European Spatial Data for Coastal and Marine Remote SensingLocal Circalittoral Rocky Seascape Structuring Fish Community: Insights from a Photogrammetric Approach - Ternon, Quentin; Collin, Antoine; Feunteun, Eric; Ysnel, Frédéric; Danet, Valentin; Guillaume, Manon; Thiriet, Pierre (Springer International Publishing, 2022)
Fish face multiple environmental pressures acting as multiscale filters structuring the community [6]. Study of the effect of local (~100 m2) habitat components such as habitat architecture, substrate composition, and benthic community on fish community is still limited because of the technical difficulties to sample reliable descriptors of all these habitat components. Nevertheless, the effect of the 3D architecture, especially the complexity, has been highlighted to act as an important variable, locally structuring fish communities and leading to an increase in diversity (species richness and Shannon index) and quantity (total density and biomass) of fish [1]. Photogrammetry is extending to submarine environment and allows to produce very fine information of the architecture and substrate composition [5], as well as of the benthic community [4]. The influence of the different habitat components (i.e., architecture, substrate composition, and benthic community) on the structure of fish community is here investigated, as well as the interest of photogrammetry in comparison to visual observation (Fig. 1).
Keywords: Architecture; Benthic community; Fish community; Photogrammetry; Seascape; Substrate composition

Exceptional preservation of internal organs in a new fossil species of freshwater shrimp (Caridea: Palaemonoidea) from the Eocene of Messel (Germany) - de Mazancourt, Valentin; Wappler, Torsten; Wedmann, Sonja (Scientific Reports, 2022)
A new species of extinct freshwater shrimp was discovered in the Eocene deposit of the Messel Pit Konservat-Lagerstätte. This rare find is represented by only a few specimens, one of which showing exceptionally preserved soft tissues and other internal parts like the stomach with possibly gastric ossicles in place, branchiae, the ovary, and the left mandible, never described in a fossil shrimp. The new species Bechleja brevirostris n. sp. is characterized by a short rostrum bearing 6–8 dorsal spines and one ventral tooth, and long second pereiopods with strong chelae. One additional specimen shows a slightly different morphology and might belong to a different species. The systematic position of the species among the superfamily Palaemonoidea is discussed, as well as implications for the knowledge of the paleoenvironment of Lake Messel and the paleobiogeography of the Eocene.

Expected contraction in the distribution ranges of demersal fish of high economic value in the Mediterranean and European SeasAbstract - Ben Lamine, Emna; Schickele, Alexandre; Goberville, Eric; Beaugrand, Grégory; Allemand, Denis; Raybaud, Virginie (Scientific Reports, 2022)
Fisheries and aquaculture are facing many challenges worldwide, especially adaptation to climate change. Investigating future distributional changes of largely harvested species has become an extensive research topic, aiming at providing realistic ecological scenarios on which to build management measures, to help fisheries and aquaculture adapt to future climate-driven changes. Here, we use an ensemble modelling approach to estimate the contemporary and future distributional range of eight demersal fish species of high economic value in the Mediterranean Sea. We identify a cardinal influence of (i) temperature on fish species distributions, all being shaped by yearly mean and seasonality in sea bottom temperature, and (ii) the primary production. By assessing the effects of changes in future climate conditions under three Representative Concentration Pathway (RCP2.6, RCP4.5 and RCP8.5) scenarios over three periods of the twenty-first century, we project a contraction of the distributional range of the eight species in the Mediterranean Sea, with a general biogeographical displacement towards the North European coasts. This will help anticipating changes in future catch potential in a warmer world, which is expected to have substantial economic consequences for Mediterranean fisheries.

Fibropapillomatosis Prevalence and Distribution in Immature Green Turtles (Chelonia mydas) in Martinique Island (Lesser Antilles) - Roost, Thibaut; Schies, Jo-Ann; Girondot, Marc; Robin, Jean-Patrice; Lelong, Pierre; Martin, Jordan; Siegwalt, Flora; Jeantet, Lorène; Giraudeau, Mathieu; Le Loch, Guillaume; Bejarano, Manola; Bonola, Marc; et al. (EcoHealth, 2022)

First evidence of migration across the South Pacific in endangered Amsterdam albatross and conservation implications - Delord, K.; Poupart, Timothée; Nicolas Gasco; Weimerskirch, H.; Barbraud, Christophe (Marine Policy, 2022)

First evidence of underwater vocalizations in green sea turtles Chelonia mydas - Charrier, Isabelle; Jeantet, Lorène; Maucourt, Léo; Régis, Sidney; Lecerf, Nicolas; Benhalilou, Abdelwahab; Chevallier, Damien (Endangered Species Research, 2022)

First record of Hippichthys albomaculosus Jenkins & Mailautoka, 2010 (Syngnathidae) in New Caledonia. Cybium, 46(1): 53-55. - Vincent Haÿ; Charpin Nicolas; Philippe Keith; Clara Lord; Marion Mennesson (Cybium, 2022)

Food selection and habitat use patterns of immature green turtles (Chelonia mydas) on Caribbean seagrass beds dominated by the alien species Halophila stipulacea - Siegwalt, Flora; Jeantet, Lorène; Lelong, Pierre; Martin, Jordan; Girondot, Marc; Bustamante, Paco; Benhalilou, Abdelwahab; Murgale, Céline; Andreani, Lucas; Jacaria, François; Campistron, Guilhem; Lathière, Anthony; et al. (Global Ecology and Conservation, 2022)

From taxonomic to functional dark diversity: Exploring the causes of potential biodiversity and its implications for conservation - Morel, Loïs; Jung, Vincent; Chollet, Simon; Frédéric Ysnel; Barbe, Lou (Journal of Applied Ecology, 2022)

A functional vulnerability framework for biodiversity conservation - Auber, Arnaud; Waldock, Conor; Maire, Anthony; Goberville, Eric; Albouy, Camille; Algar, Adam C.; McLean, Matthew; Brind'Amour, Anik; Green, Alison L.; Tupper, Mark; Vigliola, Laurent; Kaschner, Kristin; et al. (Nature Communications, 2022)
Setting appropriate conservation strategies in a multi-threat world is a challenging goal, especially because of natural complexity and budget limitations that prevent effective management of all ecosystems. Safeguarding the most threatened ecosystems requires accurate and integrative quantification of their vulnerability and their functioning, particularly the potential loss of species trait diversity which imperils their functioning. However, the magnitude of threats and associated biological responses both have high uncertainties. Additionally, a major difficulty is the recurrent lack of reference conditions for a fair and operational measurement of vulnerability. Here, we present a functional vulnerability framework that incorporates uncertainty and reference conditions into a generalizable tool. Through in silico simulations of disturbances, our framework allows us to quantify the vulnerability of communities to a wide range of threats. We demonstrate the relevance and operationality of our framework, and its global, scalable and quantitative comparability, through three case studies on marine fishes and mammals. We show that functional vulnerability has marked geographic and temporal patterns. We underline contrasting contributions of species richness and functional redundancy to the level of vulnerability among case studies, indicating that our integrative assessment can also identify the drivers of vulnerability in a world where uncertainty is omnipresent.

Geographic and taxonomic trends of rising biological invasion costs - Haubrock, Phillip J.; Cuthbert, Ross N.; Hudgins, Emma J.; Crystal-Ornelas, Robert; Kourantidou, Melina; Moodley, Desika; Liu, Chunlong; Turbelin, Anna J.; Leroy, Boris; Courchamp, Franck (Science of The Total Environment, 2022)

Histological study of the oral teeth and their bony support in the Mexican Jurassic gar †Nhanulepisosteus mexicanus (Ginglymodii, Lepisosteidae) - Brito, Paulo M.; Alvarado-Ortega, Jésus; François J Meunier (2022)
The palaeohistology of the teeth and bony skeleton of the Late Jurassic gar †Nhanulepisosteus mexicanus is described in detail from thin sections. The teeth are composed of a cone of orthodentine with a pulp cavity filled with parallel canals of osteodentine as variety of eusthenodont type plicidentine. These conspicuous histological features differentiate †Nhanulepisosteus from the majority of extant and fossil lepisosteids. The teeth are crowned with a small apical cap of acrodine, and are surrounded by a ridged layer of enamel. The bony tissues contain star-shaped osteocytes and canaliculi of Williamson matching exactly those in living lepisosteids, other holosteans, and some basal teleosts. Although the dental histology is distinct from that of extant gar species, we consider these differences are related to eco-morphological factors, noting that this pattern of histological arrangement is also found in other fossil gar species.
Keywords: Bone; Jurassic; Lepisosteidae; Palaeohistology; plicidentine; Teeth; †Nhanulepisosteus

Host use of the elkorn coral crab Domecia acanthophora (Brachyura : Domeciidae), with a phylogeny of the genus - Sancia ET Van der Meij; Henrique Bravo; Yun JH Scholten; Charlotte R. Dromard (Cahier de Biologie Marine, 2022)

Identification of a New Set of Polypeptidic Sex Pheromones from Cuttlefish (Sepia officinalis) - Céline Zatylny-Gaudin; Corre, Erwan; Zanuttini, Bruno; Endress, Maxime; Bernay, Benoît; Pontin, Julien; Leduc, Alexandre; Joël Henry (Marine Biotechnology, 2022)

Immuno-Enzymatic and Proteomic Approaches for Sexing the African Bonytongue (Heterotis niloticus Cuvier, 1829) - Koua, N’Zi Daniel; Henry, Joël; Corre, Erwan; Pontin, Julien; Bernay, Benoît; Núñez-Rodríguez, Jesús (Fishes, 2022)

Impacts of nutrient loading and fish grazing on the phytoplankton community and cyanotoxin production in a shallow tropical lake: Results from mesocosm experimentsAbstract - Ahoutou, Mathias K.; Yao, Eric Kouamé; Djeha, Rosine Y.; Kone, Mamadou; Tambosco, Kevin; Duval, Charlotte; Sahima Hamlaoui; Bernard, Cécile; Bouvy, Marc; Marie, Benjamin; Montuelle, Bernard; Troussellier, Marc; et al. (MicrobiologyOpen, 2022)

Increasing numbers of killer whale individuals use fisheries as feeding opportunities within subantarctic populations - Amelot, Morgane; Plard, Floriane; Guinet, Christophe; Arnould, John P. Y.; Nicolas Gasco; Tixier, Paul (Biology Letters, 2022)

Insights into the behavioural responses of juvenile thornback ray - Albert, Luana; Frédéric Olivier; Jolivet, Aurélie; Chauvaud, Laurent; Chauvaud, Sylvain (Journal of Fish Biology, 2022)
As part of energy transition, marine renewable energy devices (MRED) are currently expanding in developed countries inducing the deployment of dense networks of submarine power cables. Concern has thus raised about the cable magnetic emissions (direct or alternating current) because of potential interference with the sensorial environment of magneto-sensitive species, such as sharks and rays. This study sought to assess the short-term behavioural responses of juvenile thornback rays (Raja clavata) (n = 15) to direct and alternating (50 Hz) uniform 450-μT artificial magnetic fields using 1 h focal-sampling design based on a detailed ethogram. Careful control of magnetic fields' temporal and spatial scales was obtained in laboratory conditions through a custom-made Helmholtz coil device. Overall, qualitative or quantitative behavioural responses of juvenile rays did not significantly vary between control vs. exposed individuals over the morning period. Nonetheless, rays under direct current magnetic field increased their activity over the midday period. Synchronisation patterns were also observed for individuals receiving alternating current exposure (chronologic and qualitative similarities) coupled with a high interindividual variance. Further studies should consider larger batches of juveniles to address the effect of long-term exposure and explore the sensitivity range of rays with dose-response designs.

An integrative phylogenetic approach for inferring relationships of fossil gobioids - Gierl, Christoph; Dohrmann, Martin; Philippe Keith; Humphreys, William; Esmaeili, Hamid R.; Vukić, Jasna; Šanda, Radek; Reichenbacher, Bettina (PLOS ONE, 2022)

Interaction between the diatom Cylindrotheca closterium and a siliceous mortar in a silica-limited environment - Georges, Marine; Bourguiba, Amel; Boutouil, Mohamed; Chateigner, Daniel; Jolly, Orianne; Pascal Claquin (Construction and Building Materials, 2022)

Interannual variability of the initiation of the phytoplankton growing period in two French coastal ecosystems - Poppeschi, Coline; Charria, Guillaume; Daniel, Anne; Verney, Romaric; Rimmelin-Maury, Peggy; Retho, Michaël; Goberville, Eric; Emilie Grossteffan; Plus, Martin (Biogeosciences, 2022)
Decadal time series of chlorophyll a concentrations sampled at high and low frequencies are explored to study climate-induced impacts on the processes inducing interannual variations in the initiation of the phytoplankton growing period (IPGP) in early spring. We specifically detail the IPGP in two contrasting coastal temperate ecosystems under the influence of rivers highly rich in nutrients: the Bay of Brest and the Bay of Vilaine. In both coastal ecosystems, we observed a large interannual variation in the IPGP influenced by sea temperature, river inputs, light availability (modulated by solar radiation and water turbidity), and turbulent mixing generated by tidal currents, wind stress, and river runoff. We show that the IPGP is delayed by around 30 d in 2019 in comparison with 2010. In situ observations and a one-dimensional vertical model coupling hydrodynamics, biogeochemistry, and sediment dynamics show that the IPGP generally does not depend on one specific environmental factor but on the interaction between several environmental factors. In these two bays, we demonstrate that the IPGP is mainly caused by sea surface temperature and available light conditions, mostly controlled by the turbidity of the system before first blooms. While both bays are hydrodynamically contrasted, the processes that modulate the IPGP are similar. In both bays, the IPGP can be delayed by cold spells and flood events at the end of winter, provided that these extreme events last several days.

Sicyopterus garra Hora, 1925, a valid species of sicydiine goby from the Andaman Islands, India - Praveenraj, Jayasimhan; Kiruba‐Sankar, Rajendran; Saravanan, Kandasamy; Thackeray, Tejas; Singh, Pratima; Knight, John Daniel Marcus; Philippe Keith (Journal of Fish Biology, 2022)

Knowledge gaps in economic costs of invasive alien fish worldwide - Haubrock, Phillip J.; Bernery, Camille; Cuthbert, Ross N.; Liu, Chunlong; Kourantidou, Melina; Leroy, Boris; Turbelin, Anna J.; Kramer, Andrew M.; Verbrugge, Laura N.H.; Diagne, Christophe; Courchamp, Franck; Gozlan, Rodolphe E. (Science of The Total Environment, 2022)

La vie en milieu extrême - Juliette Ravaux; Sébastien Duperron (2022)

Life history and ossification patterns in Miguashaia bureaui reveal the early evolution of osteogenesis in coelacanths - Mondéjar Fernández, Jorge; François J Meunier; Cloutier, Richard; Clément, Gaël; Laurin, Michel (PeerJ, 2022)
The study of development is critical for revealing the evolution of major vertebrate lineages. Coelacanths have one of the longest evolutionary histories among osteichthyans, but despite access to extant representatives, the onset of their weakly ossified endoskeleton is still poorly understood. Here we present the first palaeohistological and skeletochronological study of Miguashaia bureaui from the Upper Devonian of Canada, pivotal for exploring the palaeobiology and early evolution of osteogenesis in coelacanths. Cross sections of the caudal fin bones show that the cortex is made of layers of primary bone separated by lines of arrested growth, indicative of a cyclical growth. The medullary cavity displays remnants of calcified cartilage associated with bony trabeculae, characteristic of endochondral ossification. A skeletochronological analysis indicates that rapid growth during a short juvenile period was followed by slower growth in adulthood. Our new analysis highlights the life history and palaeoecology of Miguashaia bureaui and reveals that, despite differences in size and habitat, the poor endoskeletal ossification known in the extant Latimeria chalumnae can be traced back at least 375 million years ago.

Linking eutrophication to carbon dioxide and methane emissions from exposed mangrove soils along an urban gradient - Barroso, Glenda C.; Gwenaël Abril; Machado, Wilson; Abuchacra, Rodrigo C.; Peixoto, Roberta B.; Bernardes, Marcelo; Marques, Gabriela S.; Sanders, Christian J.; Oliveira, Gabriela B.; Oliveira Filho, Silvio R.; Amora-Nogueira, Leonardo; Marotta, Humberto (Science of The Total Environment, 2022)

Long-Term Evolution of the Guadeloupean Shoreline (1950–2017) - Giraud-Renard, Eléa; Franck Dolique; Collin, Antoine; James, Dorothée; Gairin, Emma; Courteille, Marine; Beaufort, Océane; René-Trouillefou, Malika; Dulormne, Maguy; Jeanson, Matthieu; Lecchini, David (Journal of Coastal Research, 2022)

Macrozooplankton and micronekton diversity and associated carbon vertical patterns and fluxes under distinct productive conditions around the Kerguelen Islands - Cotté, C.; Ariza, A.; Berne, A.; Habasque, J.; Lebourges-Dhaussy, A.; Roudaut, G.; Espinasse, B.; Hunt, B.P.V.; Pakhomov, E.A.; Henschke, N.; Clara Péron; Conchon, A.; et al. (Journal of Marine Systems, 2022)

Managing biological invasions: the cost of inaction - Ahmed, Danish A.; Hudgins, Emma J.; Cuthbert, Ross N.; Kourantidou, Melina; Diagne, Christophe; Haubrock, Phillip J.; Leung, Brian; Liu, Chunlong; Leroy, Boris; Petrovskii, Sergei; Beidas, Ayah; Courchamp, Franck (Biological Invasions, 2022)

Mangrove microbiota along the urban-to-rural gradient of the Cayenne estuary (French Guiana, South America): Drivers and potential bioindicators - Fiard, Maud; Cuny, Philippe; Sylvi, Léa; Cédric Hubas; Jézéquel, Ronan; Lamy, Dominique; Walcker, Romain; El Houssainy, Amonda; Heimbürger-Boavida, Lars-Eric; Robinet, Tony; Bihannic, Isabelle; Gilbert, Franck; et al. (Science of The Total Environment, 2022)

Metagenome-Based Exploration of Bacterial Communities Associated with Cyanobacteria Strains Isolated from Thermal Muds - Halary, Sébastien; Duperron, Sébastien; Demay, Justine; Duval, Charlotte; Sahima Hamlaoui; Piquet, Bérénice; Reinhardt, Anita; Bernard, Cécile; Marie, Benjamin (Microorganisms, 2022)

Methods to detect spatial biases in tracking studies caused by differential representativeness of individuals, populations and time - Morera‐Pujol, Virginia; Catry, Paulo; Magalhães, Maria; Clara Péron; Reyes‐González, José Manuel; Granadeiro, José Pedro; Militão, Teresa; Dias, Maria P.; Oro, Daniel; Dell'Omo, Giacomo; Müller, Martina; Paiva, Vitor H.; et al. (Diversity and Distributions, 2022)

Modelling past migrations to determine efficient management rules favouring silver eel escapement from a large regulated Floodplain Lake - Bourgeaux, Jacques; Teichert, Nils; Gillier, Jean-Marc; Danet, Valentin; Eric Feunteun; Acou, Anthony; Charrier, Fabien; Mazel, Virgile; Alexandre Carpentier; Trancart, Thomas (Journal for Nature Conservation, 2022)
As human activities caused a dramatic decline of European eel population since the 1970 s, the European Union has set targets to ensure a 40% escapement to the sea of the silver eel biomass by considerably reducing anthropogenic impact. Thus, human obstacles to fish migration like dams and hydropower plants should enable efficient management measures ensuring safe passage for eels during the migration. In order to provide a quick and efficient assessment of eel conservation measure applied to the sluice gates of a large floodplain lake, we implemented a novel evaluation method using predictions on past migration seasons when no management measure were applied. For this purpose, we collected acoustic telemetry monitoring data over three migration seasons and fitted a predictive model based on Boosted Regression Trees (BRTs) to describe the influence of environmental parameters on migration. The water level difference over two days proved to be decisive, along with early migration occasions in the season, as an increase of at least 10 cm water level was associated with a sharp increase of migration probability. We then used the BRT model to predict migration occasions at the dam over 8 past seasons and forecast the impact on escapement of management measures if they had been applied. Thanks to this original prospective assessment of dam management measures, we identified an enhanced opening decision rule, capable of increasing the eel escapement for each year of the study. The management measure is particularly efficient during the years with poor hydrological conditions (i.e. droughts), that is the periods with the lowest initial escapement rates. Finally, efficient management measures to increase silver eel escapement were based on increasing the number of gate opening days by only a few days per year (c.a. 15%). However, the management measure only focused on silver eel migration, so that further investigations should consider the impacts of other threats occurring during the life cycle. This study also provides a highly operational approach for fast evaluation of conservation measures, avoiding lengthy and expensive monitoring campaigns of classical ex-post assessments.
Keywords: Eel conservation; fish migration; Predictive model; Reservoir management

Modelling the distribution of vulnerable skate from fisheries dependent data using imperfect detection - Bisch, Amaëlle; Elliott, Sophie A.M.; Alexandre Carpentier; Acou, Anthony (Progress in Oceanography, 2022)

A multi-approach study to reveal eel life-history traits in an obstructed catchment before dam removal - Teichert, Nils; Lizé, Anne; Tabouret, Hélène; Gérard, Claudia; Bareille, Gilles; Acou, Anthony; Alexandre Carpentier; Trancart, Thomas; Virag, Laure-Sarah; Robin, Emma; Druet, Morgan; Prod’Homme, Jordan; et al. (Hydrobiologia, 2022)
River fragmentation is expected to impact not only movement patterns and distribution of eels within catchment, but also their life-history traits. Here, we used otolith multi-elemental signatures to reconstruct life sequences of European silver eels within an obstructed catchment, just before the removal of hydropower dams. Beyond providing an initial state, we hypothesized that otolith signatures can provide crucial information on the way eels use the watershed. Indeed, their spatial distribution is expected to shape life-history traits, including condition coefficient, trophic level, growth rate, or infection by metazoan parasites. While Sr:Ca and Ba:Ca ratios were complementary in tracing fish movements between freshwater and estuary, the Ba:Ca variations allowed to discriminate three freshwater sectors. The eels assigned to the midstream sector were more mobile and exhibited lower growth rates, probably in response to higher competition at the vicinity of dams. While most eels are currently produced by downstream and midstream sectors, eels assigned to upper reaches of connected tributaries generally display higher richness in native parasite and higher body condition and lipid reserve, known to promote the success of migration and reproduction. In the near future, the dam removals will represent an outstanding experimental framework for evaluating impacts of catchment reconnection.
Keywords: LA-ICP-MS; life-history trait; metazoan parasites; otolith microchemistry; phenotypic plasticity; river barrier

Multifaceted roles of the egg perivitelline layer in avian reproduction: Functional insights from the proteomes of chicken egg inner and outer sublayers - Brégeon, Mégane; Tomas, Daniel; Bernay, Benoît; Céline Zatylny-Gaudin; Georgeault, Sonia; Labas, Valérie; Réhault-Godbert, Sophie; Guyot, Nicolas (Journal of Proteomics, 2022)

Multi-method approach shows stock structure in Loligo forbesii squid - Sheerin, Edel; Barnwall, Leigh; Abad, Esther; Larivain, Angela; Oesterwind, Daniel; Petroni, Michael; Perales-Raya, Catalina; Jean-Paul Robin; Sobrino, Ignacio; Valeiras, Julio; O'Meara, Denise; Pierce, Graham J; et al. (ICES Journal of Marine Science, 2022)
Knowledge of stock structure is a priority for effective assessment of commercially-fished cephalopods. Loligo forbesii squid are thought to migrate inshore for breeding and offshore for feeding and long-range movements are implied from past studies showing genetic homogeneity in the entire neritic population. Only offshore populations (Faroe and Rockall Bank) were considered distinct. The present study applied mitchondrial and microsatellite markers (nine loci) to samples from Rockall Bank, north Scotland, North Sea, various shelf locations in Ireland, English Channel, northern Bay of Biscay, north Spain, and Bay of Cadiz. No statistically significant genetic sub-structure was found, although some non-significant trends involving Rockall were seen using microsatellite markers. Differences in L. forbesii statolith shape were apparent at a subset of locations, with most locations showing pairwise differences and statoliths from north Ireland being highly distinct. This suggests that (i) statolith shape is highly sensitive to local conditions and (ii) L. forbesii forms distinguishable groups (based on shape statistics), maintaining these groups over sufficiently long periods for local conditions to affect the shape of the statolith. Overall evidence suggests that L. forbesii forms separable (ecological) groups over short timescales with a semi-isolated breeding group at Rockall whose distinctiveness varies over time.

Multiple phytoplankton community responses to environmental change in a temperate coastal system: A trait-based approach - Elsa Breton; Goberville, Eric; Benoit Sautour; Ouadi, Anis; Skouroliakou, Dimitra-Ioli; Seuront, Laurent; Grégory Beaugrand; Kléparski, Loïck; Crouvoisier, Muriel; Pecqueur, David; Salmeron, Christophe; Cauvin, Arnaud; et al. (Frontiers in Marine Science, 2022)
The effect of environmental change in structuring the phytoplankton communities of the coastal waters of the Eastern English Channel was investigated by applying a trait-based approach on two decades (1996-2019) of monitoring on diatoms and Phaeocystis. We show that phytoplankton species richness in an unbalanced nutrient supply context was influenced by wind-driven processes, ecological specialization for dissolved inorganic phosphorous, temporal niche differentiation, and a competition-defense and/or a growth-defense trade-off, a coexistence mechanism where weak competitors (i.e., slower growing) are better protected against predation. Under the influence of both environmental perturbations (e.g., wind-driven processes, freshwater influence, unbalanced nutrient levels) and biotic interactions (e.g., competition, predation, facilitation), phytoplankton species exhibited specific survival strategies such as investment on growth, adaptation and tolerance of species to environmental stresses, silicification and resource specialization. These strategies have led to more speciose communities, higher productivity, functional redundancy and stability in the last decade. Our results revealed that the unbalanced nutrient reduction facilitated Phaeocystis blooms and that anthropogenic climate warming and nitrate reduction may threaten the diatom communities of the eastern English Channel in a near future. Our results provide strong support for biogeographical historical and niche-based processes in structuring the phytoplankton community in this temperate region. The variety of species responses that we characterized in this region may help to better understand future changes in pelagic ecosystems, and can serve as a basis to consider functional approaches for future ecosystem management.

Myctobase, a circumpolar database of mesopelagic fishes for new insights into deep pelagic prey fields - Woods, Briannyn; Trebilco, Rowan; Walters, Andrea; Hindell, Mark; Guy Duhamel; Flores, Hauke; Moteki, Masato; Patrice Pruvost; Reiss, Christian; Saunders, Ryan A.; Sutton, Caroline; Gan, Yi-Ming; et al. (Scientific Data, 2022)

New Insights Into the Evolution of Corticotropin-Releasing Hormone Family With a Special Focus on Teleosts - Maugars, Gersende; Mauvois, Xavier; Martin, Patrick; Rousseau, Karine; Aroua, Salima; Sylvie Dufour (Frontiers in Endocrinology, 2022)

Obtaining DNA Samples from Sensitive and Endangered Bird Species: A Comparison of Saliva and Blood Samples - Cambrone, Christopher; Motreuil, Sébastien; Reyes, Francis O.; Landestoy, Miguel A.; Cézilly, Frank; Bezault, Etienne (Ardeola, 2022)
Methods used to collect biological samples from birds for genetic analyses should allow high-quality DNA to be obtained in sufficient quantities, while limiting negative effects on sampled individuals. In this context, we assessed the potential use of saliva sampling (using buccal swabs) as an alternative to blood sampling (supposedly more stressful) in a near-threatened Caribbean-endemic, the White-crowned Pigeon Patagioenas leucocephala, a bird known to be highly sensitive to capture and handling, based on samples collected from 28 adults captured in the wild. We quantitatively and qualitatively compared DNA extracts, amplifications of two mitochondrial genes (∼430 bp and 1040 bp), and molecular sexing between saliva and blood samples. As expected, blood samples provided larger amounts of DNA of heavy molecular weight than buccal swabs. However, buccal swabs were as reliable as blood samples as a source of genetic material to sequence mtDNA. On the other hand, buccal swab samples might require an improved PCR protocol to sex all individuals successfully. We discuss the use of buccal swabs vs. blood sampling as a way to obtain DNA in relation to research objectives and minimising stress and harmful effects.

Organic Phosphorus Scavenging Supports Efficient Growth of Diazotrophic Cyanobacteria Under Phosphate DepletionData_Sheet_1.docx - Rabouille, Sophie; Tournier, Lauralie; Duhamel, Solange; Pascal Claquin; Crispi, Olivier; Talec, Amélie; Landolfi, Angela; Oschlies, Andreas (Frontiers in Microbiology, 2022)

Pairing AIS data and underwater topography to assess maritime traffic pressures on cetaceans: Case study in the Guadeloupean waters of the Agoa sanctuary - Madon, Bénédicte; Le Guyader, Damien; Jung, Jean-Luc; de Montgolfier, Benjamin; Pascal Jean Lopez; Foulquier, Eric; Bouveret, Laurent; Le Berre, Iwan (Marine Policy, 2022)

Passive acoustics suggest two different feeding mechanisms in the Atlantic walrus (Odobenus rosmarus rosmarus) - Jézéquel, Youenn; Mathias, Delphine; Frédéric Olivier; Amice, Erwan; Chauvaud, Sylvain; Jolivet, Aurélie; Bonnel, Julien; Sejr, Mikael K.; Chauvaud, Laurent (Polar Biology, 2022)
The vocal repertoire of walruses has been widely described in the bioacoustic literature. These marine mammals produce several distinct types of vocalizations for intraspecific communication during the breeding season. In this study, we provide the first evidence of walrus-generated sounds during foraging dives when they feed on bivalves. We recorded two types of sounds that we associated to different feeding mechanisms. The first sound type was brief and low in frequency that we relate to the suction of soft parts from the bivalves’ shells through the use of walrus powerful tongues, which is the common feeding behavior reported in the walrus literature. We also recorded a second sound type composed of multiple broadband pulse trains. We hypothesize the latter were associated with bivalve shell cracking by walruses, which would represent a new feeding mechanism in the walrus literature. This new feeding mechanism is either related to bivalves’ ecology or to walruses removing the sediment when searching for food. During this study, we observed bivalves lying on the seafloor instead of being buried in the sediment in walrus feeding areas while scuba diving. As a result, walruses cannot use suction to feed on soft body part of bivalves and have to use another strategy, mastication. Our findings provide a first step towards using passive acoustics to quantify walrus behavior and feeding ecology.
Keywords: Bioacoustics; bivalves; Feeding Behavior; Marine mammal; Young Sound fjord

Phylogeography of the veined squid, Loligo forbesii, in European watersAbstract - Göpel, Anika; Oesterwind, Daniel; Barrett, Christopher; Cannas, Rita; Caparro, Luis Silva; Carbonara, Pierluigi; Donnaloia, Marilena; Follesa, Maria Cristina; Larivain, Angela; Laptikhovsky, Vladimir; Lefkaditou, Evgenia; Jean-Paul Robin; et al. (Scientific Reports, 2022)

A possible strong impact of tidal power plant on silver eels’ migration - Trancart, Thomas; Teichert, Nils; Lamoureux, Jézabel; Gharnit, Elouana; Acou, Anthony; de Oliveira, Eric; Roy, Romain; Feunteun, Eric (Estuarine, Coastal and Shelf Science, 2022)
Very few tidal power plants exist in the world. The first one was built in the Rance estuary (Brittany, France) in 1966 and the second one in South Korea. However, with the increasing demand in renewable energy, other tidal power plant projects are being studied. These power plants are larger than unidirectional fluvial hydropower plants and strongly modify the natural tidal cycle in estuarine systems. As such, their effect on megafaunal movements might strongly differ from those caused by unidirectional fluvial hydropower plants and should be specifically considered and studied before the development of similar constructions. In this study, an acoustic telemetry array was deployed to track 25 silver eels released 16 km upstream of the Rance tidal power dam. Only 1/3 of the tagged eels passed the dam and reached the sea. Data suggested that eels interrupted their migration up to 5 km upstream of the dam. We assume that the noise and tidal disturbance generated by the dam could lead to a disruption of a high proportion of silver eels’ reproductive migration.

Potential combined impacts of climate change and non-indigenous species arrivals on Bay of Biscay trophic network structure and functioning - Le Marchand, M.; Ben Rais Lasram, F.; Araignous, E.; Saint-Béat, B.; Lassalle, G.; Michelet, N.; Serre, S.; Safi, G.; Lejart, M.; Nathalie Niquil; Le Loc'h, F. (Journal of Marine Systems, 2022)

Preventing misuse of high-resolution remote sensing data - Goberville, Eric (Peer Community In Ecology, 2022)
To observe, characterise, identify, understand, predict... This is the approach that researchers follow every day. This sequence is tirelessly repeated as the biological model, the targeted ecosystem and/or the experimental, environmental or modelling conditions change. This way of proceeding is essential in a world of rapid change in response to the frenetic pace of intensifying pressures and forcings that impact ecosystems. To better understand our Earth and the dynamics of its components, to map ecosystems and diversity patterns, and to identify changes, humanity had to demonstrate inventiveness and defy gravity.

Pull the trigger: interplay between benthic and pelagic cues driving the early recruitment of a natural bivalve assemblage - Androuin, Thibault; Barbier, Pierrick; Foret, Martin; Tarik Meziane; Thomas, Mathilde; Archambault, Philippe; Winkler, Gesche; Tremblay, Rejean; Frédéric Olivier (Ecosphere, 2022)
Larval settlement and recruitment are crucial phases in the benthic-pelagic life cycle of marine benthic invertebrates that controls population dynamic and habitat connectivity. Our study investigated potential triggers driving the settlement of bivalve larvae in a highly dynamic intertidal coarse sand habitat. The early recruitment rate of five dominant bivalve families and abiotic conditions, particulate (<20 µm) organic matter and sediment organic matter, were monitored from May to October 2014. Pelagic particulate organic matter (<20 µm) was dominated by picoplankton throughout the sampling period, with a substantial diatom bloom in spring. Sediment was characterized by fresh organic matter in spring, as suggested by the dominant contribution of polyunsaturated fatty acids, and by a higher proportion of bacterial fatty acid markers during late summer. Different dynamics were also observed in early bivalve recruitment rates, with four different patterns observed over the sampling period. Multiple regression analysis on selected bivalve families showed species-specific responses to trophic settlement triggers. Indeed, the larva recruitment rate of Mytilidae paralleled pelagic concentration of picoeucaryotes, with the peak early recruitment rate occurring in spring. Surprisingly, the early recruitment rate of Mactridae larvae showed a significant relation to bacterial concentration in the surficial sediment at the end of summer. While the Mytilidae results in such a eutrophic system confirmed those of a previous study in oligotrophic lagoons, therefore supporting the trophic settlement trigger hypothesis, more work is needed to understand the potential role of bacteria in the early recruitment of Mactridae. These results highlight for the first-time inter-specific differences in trophic cues that potentially trigger primary settlement in natural bivalve assemblages.
Keywords: bacteria; bivalves; Chausey Archipelago; early larval recruitment; fatty acids; picoeucaryotes; trophic settlement trigger

Rare earth elements and yttrium in suspension-feeding bivalves (dog cockle, Glycymeris glycymeris L.): Accumulation, vital effects and pollution - Barrat, Jean-Alix; Chauvaud, Laurent; Frédéric Olivier; Poitevin, Pierre; Bayon, Germain; Ben Salem, Douraied (Geochimica et Cosmochimica Acta, 2022)

The response of microphytobenthos to physical disturbance, herbicide, and titanium dioxide nanoparticle exposure - Rimmer, James E.V.; Cédric Hubas; Wyness, Adam J.; Bruno Jesus; Hartley, Morgan; Blight, Andrew J.; Prins, Antoine; Paterson, David M (Marine Pollution Bulletin, 2022)
The microphytobenthos that form transient biofilms are important primary producers in intertidal, depositional habitats, yet we have only a limited understanding of how they respond to the cumulative impacts of the growing range of anthropogenic stressors to which they are exposed. We know even less about how the temporal alignment of exposure – such as duration and exposure sequence – may affect the response. Estuarine biofilms were cultured in mesocosms and exposed to the herbicide glyphosate and titanium dioxide (TiO2) nanoparticles in different sequences (glyphosate-first or TiO2-first), as well as in the presence and absence of physical disturbance. We found that at environmentally realistic chemical concentrations, the order of exposure was less important than the total stressor scenario in terms of impacts on key functional attributes and diatom community structure. Physical disturbance did not have an impact on functional attributes, regardless of exposure sequence.

The Response of North Sea Ecosystem Functional Groups to Warming and Changes in Fishing - Thorpe, Robert B.; Arroyo, Nina L.; Safi, Georges; Nathalie Niquil; Preciado, Izaskun; Heath, Michael; Pace, Matthew C.; Lynam, Christopher P. (Frontiers in Marine Science, 2022)

A review of methods and indicators used to evaluate the ecological modifications generated by artificial structures on marine ecosystems - Taormina, Bastien; Pascal Claquin; Vivier, Baptiste; Navon, Maxine; Pezy, Jean-Philippe; Raoux, Aurore; Dauvin, Jean-Claude (Journal of Environmental Management, 2022)

Revision of the Genus Rhyacichthys Using Integrative Taxonomy - Haÿ, Vincent; Marion Mennesson; Philippe Keith; Lord, Clara (Pacific Science, 2022)

On the road: Anthropogenic factors drive the invasion risk of a wild solitary bee species - Lanner, Julia; Dubos, Nicolas; Geslin, Benoît; Leroy, Boris; Hernández-Castellano, Carlos; Dubaić, Jovana Bila; Bortolotti, Laura; Calafat, Joan Diaz; Ćetković, Aleksandar; Flaminio, Simone; Le Féon, Violette; Margalef-Marrase, Jordi; et al. (Science of The Total Environment, 2022)

Seascapes of fear and competition shape regional seabird movement ecology - Courbin, Nicolas; Pichegru, Lorien; Seakamela, Mduduzi; Makhado, Azwianewi; Meÿer, Michael; Kotze, Pieter G. H.; Mc Cue, Steven A.; Clara Péron; Grémillet, David (Communications Biology, 2022)

Seasonal and diel modulation of DOM in a mangrove-dominated estuary - Vidal, L.O.; Lambert, T.; Cotovicz Jr., L.C.; Bernardes, M.C.; Sobrinho, R.; Thompson, F.; Garcia, G.D.; Knoppers, B.A.; Gatts, P.V.; Régis, C.R.; Gwenaël Abril; Rezende, C.E. (Science of The Total Environment, 2022)

Seasonal, Diurnal, and Tidal Variations of Dissolved Inorganic Carbon and pCO2 in Surface Waters of a Temperate Coastal Lagoon (Arcachon, SW France) - Polsenaere, Pierre; Delille, Bruno; Poirier, Dominique; Charbonnier, Céline; Deborde, Jonathan; Mouret, Aurélia; Gwenaël Abril (Estuaries and Coasts, 2022)

Seasonal dynamics of marine protist communities in tidally mixed coastal waters - Caracciolo, Mariarita; Rigaut‐Jalabert, Fabienne; Romac, Sarah; Mahé, Frédéric; Forsans, Samuel; Gac, Jean‐Philippe; Arsenieff, Laure; Manno, Maxime; Chaffron, Samuel; Cariou, Thierry; Hoebeke, Mark; Bozec, Yann; et al. (Molecular Ecology, 2022)
Major seasonal community reorganizations and associated biomass variations are landmarks of plankton ecology. However, the processes of plankton community turnover rates have not been fully elucidated so far. Here, we analyse patterns of planktonic protist community succession in temperate latitudes, based on quantitative taxonomic data from both microscopy counts (cells > 10 μm) and ribosomal DNA metabarcoding (size fraction > 3 μm, 18S rRNA gene) from plankton samples collected biweekly over 8 years (2009-2016) at the SOMLIT-Astan station (Roscoff, Western English Channel). Based on morphology, diatoms were clearly the dominating group all year round and over the study period. Metabarcoding uncovered a wider diversity spectrum and revealed the prevalence of Dinophyceae and diatoms but also of Cryptophyta, Chlorophyta, Cercozoa, Syndiniales and Ciliophora in terms of read counts and or richness. The use of morphological and molecular analyses in combination allowed improving the taxonomic resolution and to identify the sequence of the dominant species and OTUs (18S V4 rDNA-derived taxa) that drive annual plankton successions. We detected that some of these dominant OTUs were benthic as a result of the intense tidal mixing typical of the French coasts in the English Channel. Our analysis of the temporal structure of community changes point to a strong seasonality and resilience. The temporal structure of environmental variables (especially Photosynthetic Active Radiation, temperature and macronutrients) and temporal structures generated by species life cycles and or species interactions, are key drivers of the observed cyclic annual plankton turnover.

Similar trait structure and vulnerability in pelagic fish faunas on two remote island systems - Steinberg, Madeline; Juhel, Jean-Baptiste; Marques, Virginie; Clara Péron; Hocdé, Régis; Polanco Fernández, Andréa; Pellissier, Loïc; Villeger, Sebastien; Mouillot, David; Letessier, Tom B. (Marine Biology, 2022)
The link between biodiversity and ecosystem functioning has been the topic of considerable research, but it remains unclear how biodiversity decline is compromising ecosystem functionality, particularly in the pelagic realm. Here, we explore how pelagic fish species diversity relates to functional diversity by sampling two locations, which, on the basis of biogeography, environmental conditions and human pressures, were expected to host pronounced differences in species composition and abundances and therefore functionality. Strings of five drifting mid-water Baited Remote Underwater Video Systems were used to survey pelagic vertebrate diversity and abundance in two isolated oceanic island systems, the Malpelo Fauna and Flora Sanctuary—a large, 25-year-old marine protected area—and an unprotected area in Cape Verde. Functional diversity, which offers insight into a community’s resilience against disturbance, was analysed using six key functional traits of marine fishes. Abundance was recorded as MaxN, the maximum number of individuals of a given species in a single frame during the 2-h deployment time. Cape Verde showed high overall abundance (Total MaxN 873) and low biomass (3559 kg), with a predominance of smaller fishes. Malpelo showed high biomass (7839 kg) but lower abundance (Total MaxN 465), with a predominance of large species. Species and functional diversity were marginally different between locations. Multivariate analysis of species relative abundances showed significant divergence between locations, although community functional traits overlapped strongly, suggesting that both communities share a similar structure and vulnerability. The existence of a common functional ‘backbone’ in diverging species communities across the oceans, under different productivity regimes, and under different protection levels, suggests that although pelagic communities may differ considerably in terms of species composition, this does not translate into a differing functional structure and resilience potential. Whether this vulnerability is a common feature of pelagic communities and how this contrasts with benthic systems warrants further research.

Spatialized ecological network analysis for ecosystem-based management: effects of climate change, marine renewable energy, and fishing on ecosystem functioning in the Bay of SeineAbstract - Nogues, Quentin; Araignous, Emma; Bourdaud, Pierre; Halouani, Ghassen; Raoux, Aurore; Foucher, Eric; Loc'h, François Le; Loew-Turbout, Frédérique; Ben Rais Lasram, Frida; Dauvin, Jean-Claude; Nathalie Niquil (ICES Journal of Marine Science, 2022)

Spatially explicit food web modelling to consider fisheries impacts and ecosystem representation within Marine Protected Areas on the Kerguelen PlateauAbstract - Subramaniam, Roshni C; Corney, Stuart P; Melbourne-Thomas, Jessica; Clara Péron; Ziegler, Philippe; Swadling, Kerrie M (ICES Journal of Marine Science, 2022)

Spatio-temporal patterns in stable isotope composition of a benthic intertidal food web reveal limited influence from salt marsh vegetation and green tide - Sturbois, A.; Riera, P.; Desroy, N.; Brébant, T.; Alexandre Carpentier; Ponsero, A.; Schaal, G. (Marine Environmental Research, 2022)

SPREADING EUTROPHICATION AND CHANGING CO2 FLUXES IN THE TROPICAL COASTAL OCEAN: A FEW LESSONS FROM RIO DE JANEIRO - Gwenaël Abril; C. Cotovicz Jr., Luiz; Nepomuceno, Aguinaldo; Erbas, Thaís; Costa, Suzan; V. Ramos, Vinicius; Moser, Gleyci; Fernandes, Alexandre; Negri, Eduardo; A. Knoppers, Bastiaan; Brandini, Nilva; Machado, Wilson; et al. (Arquivos de Ciências do Mar, 2022)

Stable Isotope Trajectory Analysis ( SITA ): A new approach to quantify and visualize dynamics in stable isotope studies - Sturbois, Anthony; Cucherousset, Julien; De Cáceres, Miquel; Desroy, Nicolas; Riera, Pascal; Alexandre Carpentier; Quillien, Nolwenn; Grall, Jacques; Espinasse, Boris; Cherel, Yves; Schaal, Gauthier (Ecological Monographs, 2022)

Stomach content and stable isotope analyses provide complementary insights into the trophic ecology of coastal temperate bentho-demersal assemblages under environmental and anthropogenic pressures - Sturbois, A.; Cozic, A.; Schaal, G.; Desroy, N.; Riera, P.; Le Pape, O.; Le Mao, P.; Ponsero, A.; Alexandre Carpentier (Marine Environmental Research, 2022)

Structural and Functional Characterization of Orcokinin B-like Neuropeptides in the Cuttlefish (Sepia officinalis) - Endress, Maxime; Céline Zatylny-Gaudin; Leprince, Jérôme; Lefranc, Benjamin; Corre, Erwan; Le Corguillé, Gildas; Bernay, Benoît; Leduc, Alexandre; Rangama, Jimmy; Mouret, Liza; Lafont, Anne-Gaelle; Bondon, Arnaud; et al. (Marine Drugs, 2022)

The success of the bloom-forming cyanobacteria Planktothrix: Genotypes variability supports variable responses to light and temperature stress - Kim Tiam, Sandra; Comte, Katia; Dalle, Caroline; Delagrange, Marine; Djediat, Chakib; Ducos, Bertrand; Duval, Charlotte; Feilke, Kathleen; Sahima Hamlaoui; Le Manach, Séverine; Setif, Pierre; Yéprémian, Claude; et al. (Harmful Algae, 2022)

Tachykinins, new players in the control of reproduction and food intake: A comparative review in mammals and teleosts - Campo, Aurora; Sylvie Dufour; Rousseau, Karine (Frontiers in Endocrinology, 2022)

Temporal characteristics of plankton indicators in coastal waters: High-frequency data from PlanktonScope - Bi, Hongsheng; Song, Junting; Zhao, Jian; Liu, Hui; Cheng, Xuemin; Wang, Linlin; Cai, Zhonghua; Benfield, Mark C.; Otto, Saskia; Goberville, Eric; Keister, Julie; Yang, Yong; et al. (Journal of Sea Research, 2022)
Plankton are excellent indicators of ecosystem status and fisheries because of their pivotal role in marine food webs and their core values in the integrated ecosystem assessment (IEA). Monitoring plankton is essential to understand their dynamics and underlying processes. Recent advances in imaging technologies have enabled in situ, high-frequency, real-time observations of plankton in coastal waters. While high-frequency plankton time series have provided unprecedented fundamental information about physical and biological processes, understanding and identifying the underlying mechanisms that influence plankton dynamic remains a major challenge. We use high-frequency plankton data from PlanktonScope as an example to examine the impacts of physical and biological processes on plankton dynamics at different temporal scales. Frequency patterns were identified for both environmental factors and different plankton groups that matched in time. Using logistic regression models on the selected daily peaks for different plankton groups, we found that diurnal cycle, monsoon season, and major episodic events, such as typhoons, had major impacts on the dynamics of plankton, as proxied by our indicators. We further synthesized, across multiple spatiotemporal scales in the study area, the impacts of various processes on plankton with different mobility. Our study demonstrates that the suite of plankton indicators simultaneously generated from PlanktonScope provides a robust holistic view of pelagic ecosystem status over a broad range of spatiotemporal scales. In situ imaging systems like PlanktonScope are promising tools for near real-time plankton monitoring and a deep understanding of plankton dynamics.

Temporal variations in the level of chlordecone in seawater and marine organisms in Martinique Island (Lesser Antilles) - Charlotte R. Dromard; Allénou, Jean-Pierre; Tapie, Nathalie; Budzinski, Hélène; Cimmaterra, Nicolas; De Rock, Pauline; Arkam, Salim; Cordonnier, Sébastien; Gonzalez, Jean-Louis; Bouchon-Navaro, Yolande; Bouchon, Claude; Thouard, Emmanuel (Environmental Science and Pollution Research, 2022)
The present study, conducted in the Galion Bay in Martinique, aims to highlight the temporal and seasonal variations of chlordecone contamination (an organochlorine pollutant) in the ambient environment (seawater) but also in the marine organisms in three main coastal marine habitats (mangroves, seagrass beds and coral reefs). To this end, two methodologies were used to measure and compare the chemical contamination of seawater during 13 months (spot samplings and POCIS technique). In parallel, concentrations of chlordecone and isotopic ratios (C and N) were carried out on marine organisms, collected during two contrasting climatic periods (dry and rainy), to evidence seasonal variations. The results showed that the contamination of seawater displayed significant variations over time and depended on environmental factors such as water flows, which imply dilution and dispersion phenomena. Concerning the marine organisms, the level of contamination varied considerably between the two seasons in seagrass beds with higher levels of contamination during the rainy season. Reef organisms were more moderately affected by this pollution, while mangrove organisms showed a high level of chlordecone whatever the season. Finally, isotope analyses highlighted that bioamplification along marine food-webs occurs at each season and each station.
Keywords: coral reef; Mangrove; organochlorine pollution; passive samplers; seagrass; Stable isotopes

Transient Receptor Potential-Vanilloid (TRPV1-TRPV4) Channels in the Atlantic Salmon, Salmo salar. A Focus on the Pineal Gland and Melatonin Production - Nisembaum, Laura Gabriela; Loentgen, Guillaume; L'Honoré, Thibault; Martin, Patrick; Paulin, Charles-Hubert; Fuentès, Michael; Escoubeyrou, Karine; Delgado, Maria Jesus; Besseau, Laurence; Falcón, Jack (Frontiers in Physiology, 2022)
Fish are ectotherm, which rely on the external temperature to regulate their internal body temperature, although some may perform partial endothermy. Together with photoperiod, temperature oscillations, contribute to synchronizing the daily and seasonal variations of fish metabolism, physiology and behavior. Recent studies are shedding light on the mechanisms of temperature sensing and behavioral thermoregulation in fish. In particular, the role of some members of the transient receptor potential channels (TRP) is being gradually unraveled. The present study in the migratory Atlantic salmon, Salmo salar, aims at identifying the tissue distribution and abundance in mRNA corresponding to the TRP of the vanilloid subfamilies, TRPV1 and TRPV4, and at characterizing their putative role in the control of the temperature-dependent modulation of melatonin production—the time-keeping hormone—by the pineal gland. In Salmo salar, TRPV1 and TRPV4 mRNA tissue distribution appeared ubiquitous; mRNA abundance varied as a function of the month investigated. In situ hybridization and immunohistochemistry indicated specific labeling located in the photoreceptor cells of the pineal gland and the retina. Additionally, TRPV analogs modulated the production of melatonin by isolated pineal glands in culture. The TRPV1 agonist induced an inhibitory response at high concentrations, while evoking a bell-shaped response (stimulatory at low, and inhibitory at high, concentrations) when added with an antagonist. The TRPV4 agonist was stimulatory at the highest concentration used. Altogether, the present results agree with the known widespread distribution and role of TRPV1 and TRPV4 channels, and with published data on trout (Oncorhynchus mykiss), leading to suggest these channels mediate the effects of temperature on S. salar pineal melatonin production. We discuss their involvement in controlling the timing of daily and seasonal events in this migratory species, in the context of an increasing warming of water temperatures.
Keywords: Atlantic salmon; melatonin; pineal organ; Temperature; transient receptor potential vanilloid (TRPV); TRPV1; TRPV4

West Side Story: A molecular and morphological study of Caridina longicarpus Roux, 1926 (Decapoda, Caridea, Atyidae) from New Caledonia reveals a new species - de Mazancourt, Valentin; Bréthiot, Julien; Marquet, Gérard; Keith, Philippe (Zoosystema, 2022)
Numerous specimens of freshwater shrimps identified as Caridina longicarpus Roux, 1926 were recently collected from New Caledonia. Following an integrative taxonomy approach, they were morphologi- cally and genetically studied. Results of a 16S mtDNA analysis showed that the specimens initially identified as C. longicarpus were distributed in two geographically structured clades. Morphological study showed that the shrimps found in rivers draining to the east coast of the island belonged to C. longicarpus sensu stricto, whereas those from rivers draining to the west coast belonged to a new species, here described as Caridina occidentalis n. sp. Detailed redescription of C. longicarpus is pro- vided and a lectotype is designated. The existence of both species in allopatry could be explained by local biogeographical factors such as the topography of the island or oceanic circulation impacting the dispersal of larvae during the planktonic stage.

West Side Story: A molecular and morphological study of Caridina longicarpus Roux, 1926 (Decapoda, Caridea, Atyidae) from New Caledonia reveals a new species - Mazancourt, Valentin de; Bréthiot, Julien; Marquet, Gérard; Philippe Keith (Zoosystema, 2022)

Analysis of trophic networks: an optimisation approach - Caputo, Jean-Guy; Girardin, Valerie; Knippel, Arnaud; Nguyen, Minh Hieu; Nathalie Niquil; Nogues, Quentin (Journal of Mathematical Biology, 2021)

Annual phytoplankton succession results from niche-environment interactionAbstract - Caracciolo, Mariarita; Grégory Beaugrand; Pierre Hélaouët; Gevaert, Francois; Martin Edwards; Lizon, Fabrice; Kléparski, Loïck; Goberville, Eric (Journal of Plankton Research, 2021)
Annual plankton succession has been investigated for many decades with hypotheses ranging from abiotic to biotic mechanisms being proposed to explain these recurrent patterns. Here, using data collected by the Continuous Plankton Recorder (CPR) survey and models originating from the MacroEcological Theory on the Arrangement of Life, we investigate Annual Phytoplankton Succession (APS) in the North Sea at a species level. Our results show that this phenomenon can be predicted well by models combining photosynthetically active radiation, temperature and macro-nutrients. Our findings suggest that APS originates from the interaction between species’ ecological niches and the annual environmental fluctuations at a community level. We discuss our results in the context of traditional hypotheses formulated to explain this recurrent pattern in the marine field.

Anthropogenic pressures coincide with Neotropical biodiversity hotspots in a flagship butterfly group - Doré, Maël; Willmott, Keith; Leroy, Boris; Chazot, Nicolas; Mallet, James; Freitas, André V. L.; Hall, Jason P. W.; Lamas, Gerardo; Dasmahapatra, Kanchon K.; Fontaine, Colin; Elias, Marianne (Diversity and Distributions, 2021)

Anti-Inflammatory, Antioxidant, and Wound-Healing Properties of Cyanobacteria from Thermal Mud of Balaruc-Les-Bains, France: A Multi-Approach Study - Demay, Justine; Halary, Sébastien; Knittel-Obrecht, Adeline; Villa, Pascal; Duval, Charlotte; Sahima Hamlaoui; Roussel, Théotime; Yéprémian, Claude; Reinhardt, Anita; Bernard, Cécile; Marie, Benjamin (Biomolecules, 2021)

Aquatic biota responses to temperature in a high Andean geothermal stream - Quenta‐Herrera, Estefania; Daza, Antonio; Lazzaro, Xavier; Jacobsen, Dean; Dangles, Olivier; Cauvy‐Fraunié, Sophie (Freshwater Biology, 2021)
The impact of global warming on mountain ecosystems is predicted to be high, and particularly in the tropical region. Geothermal streams have provided comprehensive evidence about how aquatic biodiversity changes across natural thermal gradients, but current knowledge is restricted to arctic and temperate zones. Thermal tolerances are different in tropical biological communities, resulting in high thermal sensitivity and low capacity to endure change in their thermal environments. This feature can change the response of aquatic organisms to warming, yet there is little empirical evidence to support this assumption. In this study, we address this issue by evaluating how water temperature affects biodiversity, and the structure of primary and secondary producers of a high-elevation geothermal stream system (4,500 m above sea level) in the Bolivian Andes. We analysed multi-taxa responses to increased water temperature using benthic macroinvertebrate families, benthic algae and cyanobacteria, fishes, and macrophytes as study organisms. Different models were run to assess the response of aquatic biota to temperature. In addition, threshold indicator taxa analysis (TITAN) was used to identify changes in macroinvertebrate taxa distributions along the thermal gradient. We found that macroinvertebrate richness decreased at 24–25°C due to the different taxon-specific responses to temperature. Threshold indicator taxa analysis identified 17 temperature thresholds for each family of macroinvertebrates. Changes in macroinvertebrate community composition were significantly associated with changes in water temperature. Similarly, changes in macrophytes were associated with temperature differences, and high macrophyte richness was found at 19–20°C. Chlorophyll-a concentration of green algae and diatoms was higher at intermediate temperatures 20–22°C, macroinvertebrates density peaked at 27°C, and fish body size reduced linearly with temperature. Temperature increase in the geothermal stream resulted in a reduction of aquatic diversity and primary and secondary producers by simplifying the community structure to a few warm-adapted taxa and reduced body size. These patterns differed from those obtained in temperate/arctic geothermal streams, but are similar to other studies at high-elevation. In a context of increasing warming, the ecological structure of high-elevation streams might lose cold-adapted taxa, and change to smaller populations. Additional studies based on ecosystem functioning of geothermal streams could lead to a better understanding on how warming affects high-elevation streams.

Are we ready to track climate‐driven shifts in marine species across international boundaries? ‐ A global survey of scientific bottom trawl data - Maureaud, Aurore; Frelat, Romain; Pécuchet, Laurène; Shackell, Nancy; Mérigot, Bastien; Pinsky, Malin L.; Amador, Kofi; Anderson, Sean C.; Arkhipkin, Alexander; Auber, Arnaud; Barri, Iça; Bell, Richard J.; et al. (Global Change Biology, 2021)

Assessment of ecological status of the lagoon of Bora-Bora Island (French Polynesia) - Lecchini, David; Frédéric Bertucci; Schneider, Denis; Berthe, Cécile; Gache, Camille; Fogg, Lily; Waqalevu, Viliame; Maueau, Tehani; Sturny, Vincent; Bambridge, Tamatoa; Tong Sang, Gaston (Regional Studies in Marine Science, 2021)

Assessment of some key indicators of the ecological status of an African freshwater lagoon (Lagoon Aghien, Ivory Coast) - Koffi Ahoutou, Mathias; Yao Djeha, Rosine; Kouamé Yao, Eric; Quiblier, Catherine; Niamen-Ebrottié, Julie; Sahima Hamlaoui; Tambosco, Kevin; Perrin, Jean-Louis; Troussellier, Marc; Bernard, Cécile; Seguis, Luc; Bouvy, Marc; et al. (PLOS ONE, 2021)

Bi-decadal variability in physico-biogeochemical characteristics of temperate coastal ecosystems: from large-scale to local drivers - Lheureux, Arnaud; Savoye, Nicolas; Del Amo, Yolanda; Goberville, Eric; Bozec, Yann; Elsa Breton; Conan, Pascal; L’Helguen, Stéphane; Mousseau, Laure; Raimbault, Patrick; Rimelin-Maury, Peggy; Seuront, Laurent; et al. (Marine Ecology Progress Series, 2021)
Coastal marine ecosystems, which play a crucial role in the biogeochemical and ecological functioning of the earth system, are highly sensitive to the combined effects of climate and human activities. Because of their location, coastal ecosystems are directly influenced by human activities. Thus, it remains challenging to assess the spatial and temporal scales at which climate influences coastal ecosystems. Twelve sampling stations distributed in eight ecosystems of Western Europe were monitored during two decades for physico-biogeochemical parameters (temperature, salinity, concentrations of dissolved oxygen, nutrients and particulate material). The study encompasses a large diversity of temperate coastal ecosystems regarding geomorphology, trophic status, tidal regime, river influence, turbidity, and so on. Time-series analysis coupled with standardised 3-mode Principal Component Analyses, Partial Triadic Analyses and correlations were used to assess bi-decadal variability and ecosystems trajectories, and to detect the large-scale, regional and local drivers. Overall results highlight two abrupt changes in 2001 and 2005. The bi-decadal changes are related to changes in large-scale and regional climate; detected through proxies of temperature and atmospheric circulation, as well as through river discharge. Ecosystem trajectories usually move towards an increase in temperature, salinity and/or a decrease in chlorophyll-a, nutrients and particulate matter. However, the magnitude of change, the year-to-year variability and the sensitivity to the 2001 and 2005 changes vary among the ecosystems. This study highlights the need to perform long-term time series and combining data sets as well as multi-ecosystem and local studies to better understand long-term variability of coastal ecosystems and its associated drivers.

Biological invasions in France: Alarming costs and even more alarming knowledge gaps - Renault, David; Manfrini, Eléna; Leroy, Boris; Diagne, Christophe; Ballesteros-Mejia, Liliana; Angulo, Elena; Courchamp, Franck (NeoBiota, 2021)

Biosorption capacity of genus Dictyota facing organochlorine pesticide pollutions in coastal areas of the Lesser Antilles - Contarini, Paul-Emile; Charlotte R. Dromard (Aquatic Botany, 2021)

Born With Bristles: New Insights on the Kölliker's Organs of Octopus Skin - Villanueva, Roger; Coll-Lladó, Montserrat; Laure Bonnaud-Ponticelli; Carrasco, Sergio; Escolar, Oscar; Fernández-Álvarez, Fernando Á.; Gleadall, Ian; Nabhitabhata, Jaruwat; Ortiz, Nicolás; Rosas, Carlos; Sánchez, Pilar; Voight, Janet; et al. (Frontiers in Marine Science, 2021)

CÉPHALOPODES, EXPÉRIMENTATION ANIMALE ET LÉGISLATIONEUROPÉENNE - Laure Bonnaud-Ponticelli (Bulletin de l'Académie Vétérinaire de France, 2021)

Changes to an urban marina soundscape associated with COVID-19 lockdown in Guadeloupe - Frédéric Bertucci; Lecchini, David; Greeven, Céline; Brooker, Rohan M.; Minier, Lana; Cordonnier, Sébastien; René-Trouillefou, Malika; Parmentier, Eric (Environmental Pollution, 2021)

Characteristics of sound production and associated pharyngeal jaws in the tomtate grunt Haemulon aurolineatum (Cuvier, 1830) in Caribbean reefs - Millot, Morgane; Frédéric Bertucci; Lecchini , David; Smeets, Sarah; René-Trouillefou, Malika; Parmentier, Eric (Belgian Journal of Zoology, 2021)

The Chicken and Egg Situation of Thyroid Hormone and Glucocorticoid Signaling during Postembryonic Development - Sylvie Dufour; Sachs, Laurent M (Endocrinology, 2021)

A CO2 sink in a tropical coastal lagoon impacted by cultural eutrophication and upwelling - Erbas, Thaís; Marques, Aguinaldo; Gwenaël Abril (Estuarine, Coastal and Shelf Science, 2021)

A comment on “Morphologic and genetic characterization of Corsican and Sardinian trout with comments on Salmotaxonomy” by Delling et al. (2020): protected Tyrrhenian trouts must be named - Denys, Gaël (Knowledge & Management of Aquatic Ecosystems, 2021)

The complete mitochondrial genome of Barbatula quignardi (Băcescu-Meşter, 1967) (Teleostei, Nemacheilidae) - Gauliard, Camille; Denys, Gaël; Perea, Silvia; Dettai, Agnès (Cybium, 2021)
The complete mitochondrial DNA sequence of Barbatula quignardi (Teleostei, Nemacheilidae) was sequenced from a museum voucher caught in its type locality (Lez River). The sequence was 16,641 bp in length, consisted of 13 protein-coding genes, 22 transfer RNA genes including 2 tRNA-Leu and 2 tRNA-Ser, 2 ribosomic RNA genes and the control region. Intergenic space and overlapping gene sequences were found. The base composition of the whole mtDNA was 28.7% A, 26.2% T, 27.2% C and 17.9% G.

Conservative route to genome compaction in a miniature annelidAbstract - Martín-Durán, José M.; Vellutini, Bruno C.; Marlétaz, Ferdinand; Cetrangolo, Viviana; Cvetesic, Nevena; Thiel, Daniel; Henriet, Simon; Grau-Bové, Xavier; Carrillo-Baltodano, Allan M.; Gu, Wenjia; Kerbl, Alexandra; Marquez, Yamile; et al. (Nature Ecology & Evolution, 2021)

Contribution of toothfish depredated on fishing lines to the energy intake of killer whales off the Crozet Islands: a multi-scale bioenergetic approach - Faure, Johanna; Clara Péron; Nicolas Gasco; Massiot-Granier, Félix; Spitz, J; Guinet, C; Tixier, P (Marine Ecology Progress Series, 2021)
Fisheries modify prey availability for marine predators by extracting resources but also by providing them with new feeding opportunities. Among these, depredation, which occurs when predators feed on fish caught on fishing gear, is a behavior developed by many species as a way to acquire food through limited foraging effort. However, the extent to which depredated resources from fisheries contribute to the energetic requirements and affect the demography of depredating individuals is unknown. We investigated the contribution of Patagonian toothfish Dissostichus eleginoides depredated on longlines to the energetic requirements of killer whales Orcinus orca around the Crozet Islands (southern Indian Ocean) over the period 2007-2018. Our results indicate that during days when depredation occurred, depredating individuals fulfilled on average 94.1% of their daily energetic requirements with depredated toothfish. However, the contribution varied from 1.2 to 13.3% of the monthly energetic requirements and from 2.4 to 8.8% of the yearly energetic requirements of the total population. Together, these findings suggest that intake of depredated toothfish can be substantial at a fine scale (daily and individually), potentially leading to temporary provisioning effects and changes in predation pressures. These effects become minor (<10%), however, when considering the full population over a whole year. The contribution of depredated fish to the annual energetic requirements of the population has increased in recent years, likely due to larger fishing quotas and greater opportunities for whales to depredate, which stresses the importance of accounting for depredation in ecosystem-based management of fishing activity.

Coupling high frequency monitoring and bioassay experiments to investigate a harmful algal bloom in the Bay of Seine (French-English Channel) - Serre-Fredj, Léon; Jacqueline, Franck; Navon, Maxime; Izabel, Guillaume; Chasselin, Léo; Jolly, Orianne; Répécaud, Michel; Pascal Claquin (Marine Pollution Bulletin, 2021)
Coastal ecosystems are increasingly threatened by eutrophication and dystrophy. In this context, the full pattern of a bloom dominated by the dinoflagellate, Lepidodinium chlorophorum, was investigated by a high frequency monitoring buoy equipped with sensors allowing nutrients and photosynthesis measurements. An increase of the N/P ratio affected phytoplankton physiology leading to bloom collapse with a slight oxygen depletion. In parallel, enrichment experiments were performed on the natural bloom population. After 5 days of incubation the community structure, using flow cytometry and several physiological parameters were analysed. The data reveal a potential N and P co-limitation and a decoupling between primary production and productivity in fully enriched conditions. Under unbalanced N/P inputs, high level of alkaline phosphatase activity and transparent exopolymeric particle production, which favour phytoplankton sedimentation, were observed. Nutrient inputs and their stoichiometry control phytoplankton growth, the community structure, physiological regulations, the fate of the bloom and consequences.

Cumulative effects of marine renewable energy and climate change on ecosystem properties: Sensitivity of ecological network analysis - Nogues, Quentin; Raoux, Aurore; Araignous, Emma; Chaalali, Aurélie; Hattab, Tarek; Leroy, Boris; Ben Rais Lasram, Frida; David, Valérie; Le Loc'h, Francois; Dauvin, Jean-Claude; Nathalie Niquil (Ecological Indicators, 2021)

Data Curation, Fisheries and Ecosystem-based Management : The Case Study of the Pecheker Database - Martin Alexis; Charlotte Chazeau; Nicolas Gasco; Guy Duhamel; Patrice Pruvost (International Journal of Digital Curation, 2021)
The scientific monitoring of the Southern Ocean French fishing industry is based on the use the Pecheker database. Pecheker is dedicated to the digital curation of the data collected on field by scientific observers and which analysis allows the scientists of the Muséum national d’Histoire naturelle institution to provide guidelines and advice for the regulation of the fishing activity, the protection of the fish stocks and the protection of the marine ecosystems. The template of Pecheker has been developed to make the database adapted to the ecosystem-based management concept. Considering the global context of biodiversity erosion, this modern approach of management aims to take account of the environmental background of the fisheries to ensure their sustainable development. Completeness and high quality of the raw data is a key element for an ecosystem-based management database such as Pecheker. Here, we present the development of this database as a case study of fisheries data curation to be shared with the readers. Full code to deploy a database based on the Pecheker template is provided in supplementary materials. Considering the success factors we could identify, we propose a discussion about how the community could build a global fisheries information system based on a network of small databases including interoperability standards.

Decadal trajectories of phytoplankton communities in contrasted estuarine systems in an epicontinental sea - Lefran, Angéline; Hernández-Fariñas, Tania; Gohin, Francis; Pascal Claquin (Estuarine, Coastal and Shelf Science, 2021)
In coastal areas, global changes are known to affect estuaries and their plume leading to water temperature increase and river discharge variations, which are two of the main drivers controlling phytoplankton dynamics. This paper aims at understanding the past 10 years’ variations in term of communities’ stability and trajectories along with their relationship with the environment. Considering the high environmental variability along coastal areas, we focused our study on six contrasted estuarine systems from the eastern English Channel. Using monthly monitoring from 2008 to 2019, the response of the micro-phytoplankton compartment was investigated through the abundances of a hundred taxa and several abiotic parameters’ records. The results indicate an overall stability in community composition with an average of 30–40% similarity between pairs of samples over the study period. The phytoplankton assemblages also display greater spatial heterogeneity during summer in comparison with other seasons. The co-inertia analysis highlighted four separate systems linked to major drivers; a system under strong river and nutrient flows influence, a well-mixed and oxygenized estuary, a system challenged by offshore marine waters, and finally a system under shellfish farms pressure. This structuration is built from the dominance of a handful of species that differs from one place to another, which explains why phytoplankton is mostly site specific. Additionally, the low variations led a by few species’ dominance also explains the interannual stability noticed during summer at each area, in spite of the high diversity observed.

Detailed assessment of the reported economic costs of invasive species in Australia - Bradshaw, Corey J. A.; Hoskins, Andrew J.; Haubrock, Phillip J.; Cuthbert, Ross N.; Diagne, Christophe; Leroy, Boris; Andrews, Lindell; Page, Brad; Cassey, Phill; Sheppard, Andy W.; Courchamp, Franck (NeoBiota, 2021)

Development of robust assessment methods and harvest strategies for spatially complex, multi-jurisdictional toothfish fisheries in the Southern Ocean - Philippe Ziegler; Burch, Paul; Clara Péron; Welsford, Dirk; Bryn, Farmer; Yates, Peter; Potts, J.; Woodcock, Emma; Barnes, T.; Guy Duhamel; Gardner, C. (Fisheries Research and Development Corporation Project n°2013/013, 2021)

Dietary taurine improves vision in different age gilthead sea bream (Sparus aurata) larvae potentially contributing to increased prey hunting success and growth - Gaon, A.; Nixon, O.; Tandler, A.; Falcon, J.; Besseau, L.; Escande, M.; El Sadin, S.; Allon, G.; Koven, W. (Aquaculture, 2021)

Disentangling tropicalization and deborealization in marine ecosystems under climate change - Matthew McLean; David Mouillot; Aurore A. Maureaud; Tarek Hattab; M. Aaron MacNeil; Goberville, Eric; Martin Lindegren; Georg Engelhard; Malin Pinsky; Arnaud Auber (Current Biology, 2021)
Summary As climate change accelerates, species are shifting poleward and subtropical and tropical species are colonizing temperate environments.1, 2, 3 A popular approach for characterizing such responses is the community temperature index (CTI), which tracks the mean thermal affinity of a community. Studies in marine,4 freshwater,5 and terrestrial6 ecosystems have documented increasing CTI under global warming. However, most studies have only linked increasing CTI to increases in warm-affinity species. Here, using long-term monitoring of marine fishes across the Northern Hemisphere, we decomposed CTI changes into four underlying processes—tropicalization (increasing warm-affinity), deborealization (decreasing cold-affinity), borealization (increasing cold-affinity), and detropicalization (decreasing warm-affinity)—for which we examined spatial variability and drivers. CTI closely tracked changes in sea surface temperature, increasing in 72% of locations. However, 31% of these increases were primarily due to decreases in cold-affinity species, i.e., deborealization. Thus, increases in warm-affinity species were prevalent, but not ubiquitous. Tropicalization was stronger in areas that were initially warmer, experienced greater warming, or were deeper, while deborealization was stronger in areas that were closer to human population centers or that had higher community thermal diversity. When CTI (and temperature) increased, species that decreased were more likely to be living closer to their upper thermal limits or to be commercially fished. Additionally, warm-affinity species that increased had smaller body sizes than those that decreased. Our results show that CTI changes arise from a variety of underlying community responses that are linked to environmental conditions, human impacts, community structure, and species characteristics.
Keywords: bottom trawl; community temperature index; Fisheries; marine ecology; thermal affinity

Diversity of cyanobacteria from thermal muds (Balaruc-Les-Bains, France) with the description of Pseudochroococcus coutei gen. nov., sp. nov. - Duval, Charlotte; Sahima Hamlaoui; Piquet, Bérénice; Toutirais, Geraldine; Yéprémian, Claude; Reinhardt, Anita; Duperron, Sébastien; Marie, Benjamin; Demay, Justine; Bernard, Cécile (2021)

Do Hydrothermal Shrimp Smell Vents? - Ravaux, Juliette; Machon, Julia; Shillito, Bruce; Barthélémy, Dominique; Amand, Louis; Cabral, Mélanie; Delcour, Elise; Zbinden, Magali (Insects, 2021)
Deep-sea species endemic to hydrothermal vents face the critical challenge of detecting active sites in a vast environment devoid of sunlight. This certainly requires specific sensory abilities, among which olfaction could be a relevant sensory modality, since chemical compounds in hydrothermal fluids or food odors could potentially serve as orientation cues. The temperature of the vent fluid might also be used for locating vent sites. The objective of this study is to observe the following key behaviors of olfaction in hydrothermal shrimp, which could provide an insight into their olfactory capacities: (1) grooming behavior; (2) attraction to environmental cues (food odors and fluid markers). We designed experiments at both deep-sea and atmospheric pressure to assess the behavior of the vent shrimp Rimicaris exoculata and Mirocaris fortunata, as well as of the coastal species Palaemon elegans and Palaemon serratus for comparison. Here, we show that hydrothermal shrimp groom their sensory appendages similarly to other crustaceans, but this does not clean the dense bacterial biofilm that covers the olfactory structures. These shrimp have previously been shown to possess functional sensory structures, and to detect the environmental olfactory signals tested, but we do not observe significant attraction behavior here. Only temperature, as a signature of vent fluids, clearly attracts vent shrimp and thus is confirmed to be a relevant signal for orientation in their environment.
Keywords: antennules; behavior; chemosensory perception; grooming; hydrothermal shrimp; olfaction; thermal detection

Do Hydrothermal Shrimp Smell Vents? - Juliette Ravaux; Machon, Julia; Shillito, Bruce; Barthélémy, Dominique; Amand, Louis; Cabral, Mélanie; Delcour, Elise; Zbinden, Magali (Insects, 2021)

Do Hydrothermal Shrimp Smell Vents? - Ravaux, Juliette; Machon, Julia; Shillito, Bruce; Barthélémy, Dominique; Amand, Louis; Cabral, Mélanie; Delcour, Elise; Zbinden, Magali (Insects, 2021)
Deep-sea species endemic to hydrothermal vents face the critical challenge of detecting active sites in a vast environment devoid of sunlight. This certainly requires specific sensory abilities, among which olfaction could be a relevant sensory modality, since chemical compounds in hydrothermal fluids or food odors could potentially serve as orientation cues. The temperature of the vent fluid might also be used for locating vent sites. The objective of this study is to observe the following key behaviors of olfaction in hydrothermal shrimp, which could provide an insight into their olfactory capacities: (1) grooming behavior; (2) attraction to environmental cues (food odors and fluid markers). We designed experiments at both deep-sea and atmospheric pressure to assess the behavior of the vent shrimp and , as well as of the coastal species and for comparison. Here, we show that hydrothermal shrimp groom their sensory appendages similarly to other crustaceans, but this does not clean the dense bacterial biofilm that covers the olfactory structures. These shrimp have previously been shown to possess functional sensory structures, and to detect the environmental olfactory signals tested, but we do not observe significant attraction behavior here. Only temperature, as a signature of vent fluids, clearly attracts vent shrimp and thus is confirmed to be a relevant signal for orientation in their environment.

The economic costs of biological invasions in Africa: a growing but neglected threat? - Diagne, Christophe; Turbelin, Anna J.; Moodley, Desika; Novoa, Ana; Leroy, Boris; Angulo, Elena; Adamjy, Tasnime; Dia, Cheikh A.K.M.; Taheri, Ahmed; Tambo, Justice; Dobigny, Gauthier; Courchamp, Franck (NeoBiota, 2021)

Economic costs of biological invasions within North America - Crystal-Ornelas, Rob; Hudgins, Emma J; Cuthbert, Ross N.; Haubrock, Phillip J.; Fantle-Lepczyk, J; Angulo, Elena; Kramer, Andrew M.; Ballesteros-Mejia, Liliana; Leroy, Boris; Leung, Brian; López-López, E; Diagne, Christophe; et al. (NeoBiota, 2021)

Economic costs of invasive alien species across Europe - Haubrock, Phillip J.; Turbelin, Anna J.; Cuthbert, Ross N.; Novoa, Ana; Taylor, Nigel G.; Angulo, Elena; Ballesteros-Mejia, Liliana; Bodey, Thomas W.; Capinha, César; Diagne, Christophe; Essl, Franz; Golivets, Marina; et al. (NeoBiota, 2021)

Economic costs of invasive alien species in the Mediterranean basin - Kourantidou, Melina; Cuthbert, Ross N.; Haubrock, Phillip J.; Novoa, Ana; Taylor, Nigel G.; Leroy, Boris; Capinha, César; Renault, David; Angulo, Elena; Diagne, Christophe; Courchamp, Franck (NeoBiota, 2021)

Effects of Coastline Modification on Coral Reef Fish Nurseries (Moorea, French Polynesia) - Gasc, Julien; Gache, Camille; Frédéric Bertucci; Madi Moussa, Rakamaly; Waqalevu, Viliame; Lecchini, David (Journal of Coastal Research, 2021)

Effects of Melatonin on Anterior Pituitary Plasticity: A Comparison Between Mammals and Teleosts - Ciani, Elia; Haug, Trude M.; Maugars, Gersende; Weltzien, Finn-Arne; Falcón, Jack; Fontaine, Romain (Frontiers in Endocrinology, 2021)
Melatonin is a key hormone involved in the photoperiodic signaling pathway. In both teleosts and mammals, melatonin produced in the pineal gland at night is released into the blood and cerebrospinal fluid, providing rhythmic information to the whole organism. Melatonin acts via specific receptors, allowing the synchronization of daily and annual physiological rhythms to environmental conditions. The pituitary gland, which produces several hormones involved in a variety of physiological processes such as growth, metabolism, stress and reproduction, is an important target of melatonin. Melatonin modulates pituitary cellular activities, adjusting the synthesis and release of the different pituitary hormones to the functional demands, which changes during the day, seasons and life stages. It is, however, not always clear whether melatonin acts directly or indirectly on the pituitary. Indeed, melatonin also acts both upstream, on brain centers that control the pituitary hormone production and release, as well as downstream, on the tissues targeted by the pituitary hormones, which provide positive and negative feedback to the pituitary gland. In this review, we describe the known pathways through which melatonin modulates anterior pituitary hormonal production, distinguishing indirect effects mediated by brain centers from direct effects on the anterior pituitary. We also highlight similarities and differences between teleosts and mammals, drawing attention to knowledge gaps, and suggesting aims for future research.

Efficiency of the call-broadcast method for detecting two Caribbean-endemic columbid game species - Cambrone, Christopher; Bezault, Etienne; Cézilly, Frank (European Journal of Wildlife Research, 2021)

Electron & Biomass Dynamics of Cyanothece Under Interacting Nitrogen & Carbon Limitations - Rabouille, Sophie; Campbell, Douglas A.; Masuda, Takako; Zavřel, Tomas; Bernát, Gabor; Polerecky, Lubos; Halsey, Kimberly; Eichner, Meri; Kotabová, Eva; Stephan, Susanne; Lukeš, Martin; Pascal Claquin; et al. (Frontiers in Microbiology, 2021)

Eleotris (Teleostei: Eleotridae) from Indonesia with description of three news species - Marion Mennesson; Philippe Keith; Hubert, Nicolas (Pacific Science, 2021)
The species of Eleotris from Indonesia are reviewed and compared to the known species described from the area. Nine species are recognized including three new species in the ‘melanosoma’ neuromast pattern group. These are described using genetic and morpho-meristic approaches. The new species differ by a high percentage of genetic divergence in partial COI gene (652 bp) and by several characters including the number of pectoral fin rays, the number of scales in lateral, predorsal, forward and zigzag series. The main characteristics of the other known species in the area in the ‘melanosoma’ group, Eleotris melanosoma Bleeker, 1853 and Eleotris macrolepis (Bleeker, 1875), both belonging to this group, are given for comparison. A key for Eleotris species from Indonesia is provided.

Environmental heterogeneity drives phytoplankton community assembly patterns in a tropical riverine system - Cédric Hubas; Goberville, Eric (Peer Community In Ecology, 2021)

Epizoic diatoms on sea turtles and their relationship to host species, behaviour and biogeography: a morphological approach - Riaux-Gobin, Catherine; Ashworth, Matt P.; Kociolek, J.Patrick; Chevallier, Damien; Saenz-Agudelo, Pablo; Witkowski, Andrzej; Daniszewska-Kowalczyk, Genowefa; Gaspar, Cecile; Lagant, Magali; Touron, Margaux; Carpentier, Alice; Stabile, Vie; et al. (European Journal of Phycology, 2021)

Establishing water sample protocols for radiocarbon analysis at LAC-UFF, Brazil - Bragança, Daniela; Oliveira, Fabiana; Macario, Kita; Nunes, Vinicius; Muniz, Marcelo; Lamego, Fernando; Gwenaël Abril; Nepomuceno, Aguinaldo; Solís, Corina; Rodríguez-Ceja, María (Radiocarbon, 2021)
Since the establishment of the first radiocarbon accelerator mass spectrometry facility in Latin America in 2009, the Radiocarbon Laboratory team of Universidade Federal Fluminense (LAC-UFF) has worked to improve sample preparation protocols and increase the range of environmental matrices to be analyzed. We now present the preliminary results for DIC sample preparation protocols. The first validation tests include background evaluation with pMC value (0.35 ± 0.04) using bicarbonate dissolved in water. We also analyzed surface seawater resulting in pMC value (101.38 ± 0.38) and a groundwater previously dated from LEMA AMS-Laboratory with pMC value (12.30 ± 0.15).

Estimating ecotoxicological effects of chemicals on tropical reef-building corals; a systematic review protocol - Ouédraogo, Dakis-Yaoba; Perceval, Olivier; Ferrier-Pages, Christine; Domart-Coulon, Isabelle; Hédouin, Laetitia; Burga, Karen; Mireille M.M. Guillaume; Calvayrac, Christophe; Castelin, Magalie; Reyjol, Yorick; Sordello, Romain (Environmental Evidence, 2021)

European small pelagic fish distribution under global change scenarios - Schickele, Alexandre; Goberville, Eric; Leroy, Boris; Grégory Beaugrand; Hattab, Tarek; Patrice Francour; Virginie Raybaud (Fish and Fisheries, 2021)
The spectre of increasing impacts on exploited fish stocks in consequence of warmer climate conditions has become a major concern over the last decades. It is now imperative to improve the way we project the effects of future climate warming on fisheries. While estimating future climate‐induced changes in fish distribution is an important contribution to sustainable resource management, the impacts on European small pelagic fish—representing over 50% of the landings in the Mediterranean and Black Sea between 2000 and 2013—are yet largely understudied. Here, we investigated potential changes in the spatial distribution of seven of the most harvested small pelagic fish species in Europe under several climate change scenarios over the 21st century. For each species, we considered eight Species Distribution Models (SDMs), five General Circulation Models (GCMs) and three emission scenarios (the IPCC Representative Concentration Pathways; RCPs). Under all scenarios, our results revealed that the environmental suitability for most of the seven species may strongly decrease in the Mediterranean and western North Sea while increasing in the Black and Baltic Seas. This potential northward range expansion of species is supported by a strong convergence among projections and a low variability between RCPs. Under the most pessimistic scenario (RCP8.5), climate‐related local extinctions were expected in the south‐eastern Mediterranean basin. Our results highlight that a multi‐SDM, multi‐GCM, multi‐RCP approach is needed to produce more robust ecological scenarios of changes in exploited fish stocks in order to better anticipate the economic and social consequences of global climate change.

Eutrophication overcoming carbonate precipitation in a tropical hypersaline coastal lagoon acting as a CO2 sink (Araruama Lagoon, SE Brazil) - Cotovicz, Luiz C.; Knoppers, Bastiaan A.; Régis, Carolina R.; Tremmel, Daniel; Costa-Santos, Suzan; Gwenaël Abril (Biogeochemistry, 2021)

Evidence on the impacts of chemicals arising from human activity on tropical reef-building corals; a systematic map - Ouédraogo, Dakis-Yaoba; Delaunay, Mathilde; Sordello, Romain; Hédouin, L.; Castelin, Magalie; Perceval, Olivier; Domart-Coulon, Isabelle; Burga, Karen; Ferrier-Pages, Christine; Multon, Romane; Mireille M.M. Guillaume; Léger, Clément; et al. (Environmental Evidence, 2021)

Exploration of chemosensory ionotropic receptors in cephalopods: the IR25 gene is expressed in the olfactory organs, suckers, and fins of Sepia officinalis. - Aude Andouche; Valera, Stéphane; Sébastien Baratte (Chem Senses, 2021)
While they are mostly renowned for their visual capacities, cephalopods are also good at olfaction for prey, predator, and conspecific detection. The olfactory organs and olfactory cells are well described but olfactory receptors-genes and proteins-are still undescribed in cephalopods. We conducted a broad phylogenetic analysis of the ionotropic glutamate receptor family in mollusks (iGluR), especially to identify IR members (Ionotropic Receptors), a variant subfamily whose involvement in chemosensory functions has been shown in most studied protostomes. A total of 312 iGluRs sequences (including 111 IRs) from gastropods, bivalves, and cephalopods were identified and annotated. One orthologue of the gene coding for the chemosensory IR25 co-receptor has been found in Sepia officinalis (Soff-IR25). We searched for Soff-IR25 expression at the cellular level by in situ hybridization in whole embryos at late stages before hatching. Expression was observed in the olfactory organs, which strongly validates the chemosensory function of this receptor in cephalopods. Soff-IR25 was also detected in the developing suckers, which suggests that the unique « taste by touch » behavior that cephalopods execute with their arms and suckers share features with olfaction. Finally, Soff-IR25 positive cells were unexpectedly found in fins, the two posterior appendages of cephalopods, mostly involved in locomotory functions. This result opens new avenues of investigation to confirm fins as additional chemosensory organs in cephalopods.
Keywords: Animals; Cephalopoda; Phylogeny; Receptors, Ionotropic Glutamate; Receptors, Odorant; Sepia; Smell

First Assessment of the Benthic Meiofauna Sensitivity to Low Human-Impacted Mangroves in French Guiana - Michelet, Claire; Zeppilli, Daniela; Cédric Hubas; Baldrighi, Elisa; Cuny, Philippe; Guillaume Dirberg; Militon, Cécile; Walcker, Romain; Lamy, Dominique; Jézéquel, Ronan; Receveur, Justine; Gilbert, Franck; et al. (Forests, 2021)

First highlight of sound production in the glassy sweeper Pempheris schomburgkii (Pempheridae) - Frédéric Bertucci; Parmentier, Eric; Hillion, Anaïs; Cordonnier, Sébastien; Lecchini, David; René-Trouillefou, Malika (Marine Biology, 2021)

First use of acoustic calls to distinguish cryptic members of a fish species complex - Parmentier, Eric; Scalbert, Robin; Raick, Xavier; Gache, Camille; Frédérich, Bruno; Frédéric Bertucci; Lecchini, David (Zoological Journal of the Linnean Society, 2021)

Food source diversity, trophic plasticity, and omnivory enhance the stability of a shallow benthic food web from a high-Arctic fjord exposed to freshwater inputs - Bridier, Guillaume; Frédéric Olivier; Chauvaud, Laurent; Sejr, Mikael K.; Grall, Jacques (Limnology and Oceanography, 2021)
Under climate change, many Arctic coastal ecosystems receive increasing amounts of freshwater, with ecological consequences that remain poorly understood. In this study, we investigated how freshwater inputs may affect the small-scale structure of benthic food webs in a low-production high-Arctic fjord (Young Sound, NE Greenland). We seasonally sampled benthic invertebrates from two stations receiving contrasting freshwater inputs: an inner station exposed to turbid and nutrient-depleted freshwater flows and an outer station exposed to lower terrestrial influences. Benthic food web structure was described using a stable isotope approach (δ13C and δ15N), Bayesian models, and community-wide metrics. The results revealed the spatially and temporally homogeneous structure of the benthic food web, characterized by high trophic diversity (i.e., a wide community isotopic niche). Such temporal stability and spatial homogeneity mirrors the high degree of trophic plasticity and omnivory of benthic consumers that allows the maintenance of several carbon pathways through the food web despite different food availability. Furthermore, potential large inputs of shelf organic matter together with local benthic primary production (i.e., macroalgae and presumably microphytobenthos) may considerably increase the stability of the benthic food web by providing alternative food sources to locally runoff-impacted pelagic primary production. Future studies should assess beyond which threshold limit a larger increase in freshwater inputs might cancel out these stability factors and lead to marked changes in Arctic benthic ecosystems.

Four-Year Temporal Study of an Intertidal Artificial Structure in the English Channel - Dauvin, Jean-Claude; Deloor, Maël; Pezy, Jean-Philippe; Raoux, Aurore; Pascal Claquin; Foveau, Aurélie (Journal of Marine Science and Engineering, 2021)

Freshwater fish of Solomon Islands - Philippe Keith; Boseto, David; Clara Lord (Société Française d’Ichtyologie, 2021)

Fully Convolutional Neural Network: A solution to infer animal behaviours from multi-sensor data - Jeantet, Lorène; Vigon, Vincent; Geiger, Sébastien; Chevallier, Damien (Ecological Modelling, 2021)

Global systematic diversity, range distributions, conservation and taxonomic assessments of graylings (Teleostei: Salmonidae; Thymallus spp.)Abstract - Weiss, Steven J.; Gonçalves, Duarte V.; Secci-Petretto, Giulia; Englmaier, Gernot K.; Gomes-Dos-Santos, André; Denys, Gaël; Persat, Henri; Antonov, Alexander; Hahn, Christoph; Taylor, Eric B.; Froufe, Elsa (Organisms Diversity & Evolution, 2021)

Gonadal transcriptomes associated with sex phenotypes provide potential male and female candidate genes of sex determination or early differentiation in Crassostrea gigas, a sequential hermaphrodite mollusc. - Broquard, Coralie; Saowaros, Suwansa-Ard; Lepoittevin, Mélanie; Degremont, Lionel; Lamy, Jean-Baptiste; Morga, Benjamin; Elizur, Abigail; Anne-Sophie Martinez (BMC Genomics, 2021)
BACKGROUND: In the animal kingdom, mollusca is an important phylum of the Lophotrochozoa. However, few studies have investigated the molecular cascade of sex determination/early gonadal differentiation within this phylum. The oyster Crassostrea gigas is a sequential irregular hermaphrodite mollusc of economic, physiological and phylogenetic importance. Although some studies identified genes of its sex-determining/-differentiating pathway, this particular topic remains to be further deepened, in particular with regard to the expression patterns. Indeed, these patterns need to cover the entire period of sex lability and have to be associated to future sex phenotypes, usually impossible to establish in this sequential hermaphrodite. This is why we performed a gonadal RNA-Seq analysis of diploid male and female oysters that have not changed sex for 4 years, sampled during the entire time-window of sex determination/early sex differentiation (stages 0 and 3 of the gametogenetic cycle). This individual long-term monitoring gave us the opportunity to explain the molecular expression patterns in the light of the most statistically likely future sex of each oyster. RESULTS: The differential gene expression analysis of gonadal transcriptomes revealed that 9723 genes were differentially expressed between gametogenetic stages, and 141 between sexes (98 and 43 genes highly expressed in females and males, respectively). Eighty-four genes were both stage- and sex-specific, 57 of them being highly expressed at the time of sex determination/early sex differentiation. These 4 novel genes including Trophoblast glycoprotein-like, Protein PML-like, Protein singed-like and PREDICTED: paramyosin, while being supported by RT-qPCR, displayed sexually dimorphic gene expression patterns. CONCLUSIONS: This gonadal transcriptome analysis, the first one associated with sex phenotypes in C. gigas, revealed 57 genes highly expressed in stage 0 or 3 of gametogenesis and which could be linked to the future sex of the individuals. While further study will be needed to suggest a role for these factors, some could certainly be original potential actors involved in sex determination/early sex differentiation, like paramyosin and could be used to predict the future sex of oysters.
Keywords: Animals; Crassostrea; Female; Gene Expression Profiling; Gonads; Humans; Male; Phenotype; Phylogeny; Sex Differentiation; Transcriptome

Greenhouse gas emissions (CO2 and CH4) and inorganic carbon behavior in an urban highly polluted tropical coastal lagoon (SE, Brazil) - Cotovicz, Luiz C.; Ribeiro, Renato P.; Régis, Carolina Ramos; Bernardes, Marcelo; Sobrinho, Rodrigo; Vidal, Luciana Oliveira; Tremmel, Daniel; Knoppers, Bastiaan A.; Gwenaël Abril (Environmental Science and Pollution Research, 2021)

High and rising economic costs of biological invasions worldwide - Diagne, Christophe; Leroy, Boris; Vaissière, Anne-Charlotte; Gozlan, Rodolphe E.; Roiz, David; Jarić, Ivan; Salles, Jean-Michel; Bradshaw, Corey J. A.; Courchamp, Franck (Nature, 2021)

High nutrient loading and climatic parameters influence the dominance and dissimilarity of toxigenic cyanobacteria in northern bays of Lake Victoria - Olokotum, Mark; Troussellier, Marc; Escalas, Arthur; Sahima Hamlaoui; Okello, William; Semyalo, Ronald; Humbert, Jean-François; Bernard, Cécile (Journal of Great Lakes Research, 2021)

How many fish could be vocal? An estimation from a coral reef (Moorea Island) - Parmentier, Eric; Frédéric Bertucci; Bolgan, Marta; Lecchini, David (Belgian Journal of Zoology, 2021)

Identification of benthic egg masses and spawning grounds in commercial squid in the English Channel and Celtic Sea: Loligo vulgaris vs L. forbesii - Laptikhovsky, Vladimir; Cooke, Gavan; Barrett, Christopher; Lozach, Sophie; MacLeod, Eleanor; Oesterwind, Daniel; Sheerin, Edel; Petroni, Michael; Barnwall, Leigh; Jean-Paul Robin; Allcock, Louise; Power, Anne Marie (Fisheries Research, 2021)

Impacts of climate change on the Bay of Seine ecosystem: Forcing a spatio‐temporal trophic model with predictions from an ecological niche model - Bourdaud, Pierre; Ben Rais Lasram, Frida; Araignous, Emma; Champagnat, Juliette; Grusd, Samantha; Halouani, Ghassen; Hattab, Tarek; Leroy, Boris; Nogues, Quentin; Raoux, Aurore; Safi, Georges; Nathalie Niquil (Fisheries Oceanography, 2021)

Influence des perturbations anthropiques sur les communautés de petits mammifères des savanes gabonaises - Mboumba, Jean-François; Momboua, Brice Roxan; Perin, Eline; Frédéric Ysnel (International Journal of Biological and Chemical Sciences, 2021)

Influence of environmental conditions on the distribution of burrows of the mud crab, Scylla serrata, in a fringing mangrove ecosystem - Leoville, Alexandre; Lagarde, Raphaël; Grondin, Henri; Faivre, Laëtitia; Rasoanirina, Elisa; Teichert, Nils (Regional Studies in Marine Science, 2021)
Mud crab, Scylla serrata, is a common mangrove species in the Indian Ocean. Over the last decades, fishing pressure has greatly increased especially in Madagascar. Therefore, improving the knowledge of mud crab biology and ecology is crucial to guide conservation and restoration plans. This study aimed at describing the distribution of burrows of the mud crab in a mangrove in southwestern Madagascar. Burrows fulfill an essential functional role by limiting the exposure of crab to environmental stress, such as desiccation during low tide, and predation. A total of 140 burrows were observed and available conditions were described at 168 random sampling points at low tide in three different mangrove zones, during the dry season (July 2014). Twelve environmental factors were recorded to reflect the position within the mangrove, the substrate composition and the surrounding floristic structure. A multivariate ordination analysis highlighted an overall association between burrows and specific habitat conditions. Boosted regression trees then indicated that the burrows distribution was predominantly explained by the avoidance of hard substrates. The occurrence of burrows was positively related to the upper intertidal zone of the mangrove where the water level was below 100 cm. Although the tree density had a positive effect, the occurrence of burrows was higher for low percentage of shade (<40%). These results provide insight for identifying mangrove areas that have an essential functional role for the conservation of mud crab populations.
Keywords: Crustacean; Floristic structure; Habitat conditions; Mangrove crab; Substratum composition

Influence of infrastructure material composition and microtopography on marine biofilm growth and photobiology - Vivier, Baptiste; Pascal Claquin; Lelong, Christophe; Lesage, Quentin; Peccate, Mathias; Hamel, Bastien; Georges, Marine; Bourguiba, Amel; Sebaibi, Nassim; Boutouil, Mohamed; Goux, Didier; Dauvin, Jean-Claude; et al. (Biofouling, 2021)

Interactions between Filter-Feeding Bivalves and Toxic Diatoms: Influence on the Feeding Behavior of Crassostrea gigas and Pecten maximus and on Toxin Production by Pseudo-nitzschia - Sauvey, Aurore; Denis, Françoise; Hégaret, Hélène; Le Roy, Bertrand; Lelong, Christophe; Jolly, Orianne; Pavie, Marie; Juliette Fauchot (Toxins, 2021)

Interdependence of thyroid and corticosteroid signalling in vertebrate developmental transitions - Karine Rousseau; Sylvie Dufour; Sachs, Laurent M (Frontiers in Ecology and Evolution, 2021)

Interstitial Annelida - Worsaae, Katrine; Kerbl, Alexandra; Domenico, Maikon Di; Gonzalez, Brett C.; Bekkouche, Nicolas; Martínez, Alejandro (Diversity, 2021)

Involvement of RFamide neuropeptides in polyp contraction of the adult scleractinian corals Euphyllia ancora and Stylophora pistillata - Zhang, Yan; Shikina, Shinya; Ho, Yu-Ying; Chiu, Yi-Ling; I-Chen Yao, Jack; Céline Zatylny-Gaudin; Sylvie Dufour; Chang, Ching-Fong (General and Comparative Endocrinology, 2021)

Involvement of Transforming Growth Factor Beta family genes in gonadal differentiation in Japanese eel, Anguilla japonica, according to sex-related gene expressions - Lin, Chien-Ju; Jeng, Shan-Ru; Lei, Zhen-Yuan; Yueh, When-Shiun; Sylvie Dufour; Wu, Guan-Chung; Chang, Ching-Fong (Cells, 2021)

Isolation-by-distance and male-biased dispersal at a fine spatial scale: a study of the common European adder (Vipera berus) in a rural landscape - François, Donatien; Ursenbacher, Sylvain; Boissinot, Alexandre; Frédéric Ysnel; Lourdais, Olivier (Conservation Genetics, 2021)

Kakila database: Towards a FAIR community approved database of cetacean presence in the waters of the Guadeloupe archipelago based on citizen science - Coché, Lorraine; Arnaud, Elie; Bouveret, Laurent; David, Romain; Foulquier, Eric; Gandilhon, Nadège; Jeannesson, Etienne; Le Bras, Yvan; Lerigoleur, Emilie; Pascal Jean Lopez; Madon, Bénédicte; Sananikone, Julien; et al. (Biodiversity Data Journal, 2021)

La protection des milieux aquatiques. Vulnérabilité et sensibilité fonctionnelle des communautés de poissons - Teichert, Nils; Lepage, Mario; Hette-Tronquart, Nicolas; Argillier, Christine (Sciences Eaux & Territoires, 2021)
Les approches en écologie fonctionnelle ouvrent aujourd’hui de nouvelles perspectives dans le domaine du diagnostic écologique. C’est le cas par exemple du critère de la redondance fonctionnelle que les auteurs de cet article ont appliqué aux communautés de poissons pour évaluer leur sensibilité fonctionnelle à la perte d’espèces, et au-delà, mesurer l’influence d’un déclin potentiel de diversité sur le fonctionnement de l’écosystème. L’intégration de ce type d’indice, en complément des critères habituels, est utile pour définir des plans de gestion ou des sites prioritaires à protéger face à des perturbations environnementales, en se concentrant sur les processus écosystémiques.

Les collections naturalistes dans la science du XXIe siècleLa collection « cyanobactéries et microalgues » à l’heure des « -omics » - Pellens, Roseli; Duperron, Sébastien; Duval, Charlotte; Sahima Hamlaoui; Comte, Katia; Yéprémian, Claude; Bernard, Cécile (ISTE Group, 2021)

Levels of genetic differentiation and gene flow between four populations of the Scaly-naped Pigeon, Patagioenas squamosa: implications for conservation - Cambrone, Christopher; Cézilly, Frank; Wattier, Rémi; Eraud, Cyril; Bezault, Etienne (Studies on Neotropical Fauna and Environment, 2021)

Links between introduced fish and zooplanktonic and zoobenthic food sources in the food webs of two reservoirs of a semi-arid zone in Algeria - Djezzar, M; Mortillaro, JM; Doumandji, SE; Tarik Meziane (African Journal of Aquatic Science, 2021)
Few studies have focused on the trophic functioning of the reservoirs in Algeria. The study of the gut contents of fish species, as well as the analysis of the stable isotopes of 13C and 15N in the environment, were carried out on samples collected during spring 2010 in two reservoirs: Ghrib and Harreza of the upper Cheliff plain (Algeria) within a semi-arid climate zone. In each of the reservoirs, 13C and 15N were measured in sediments, particulate organic matter (POM), macrophytes, zooplankton, zoobenthos and fish. The isotopic analysis shows that the carbon values that supply both reservoirs, Ghrib and Harreza, were −31.16 ± 0.05 < 13C < −18.01 ± 0.21‰ and −30.82 ± 0.07 < 13C < −17.24 ± 3.50‰, respectively. The carnivorous fish Sander lucioperca, and Abramis brama, an omnivorous fish, were allocated to the top of the food web in Ghrib and Harreza reservoirs, respectively. In the latter, a reservoir with low hydrodynamism and depth, the food web is simpler with a single fish species, which benefits from both benthic and pelagic sources. In Ghrib, a deeper dam with stronger hydrodynamics, only the riverine crab Potamon algeriense exploits the benthic sources, whereas fish mainly feed on zooplankton

Local perceptions of socio-ecological drivers and effects of coastal armoring: the case of Moorea, French Polynesia - Calandra, Maëlle; Wencélius, Jean; Madi Moussa, Rakamaly; Gache, Camille; Berthe, Cécile; Waqalevu, Viliame; Ung, Pascal; Lerouvreur, Franck; Bambridge, Tamatoa; Galzin, René; Frédéric Bertucci; Lecchini, David (Population and Environment, 2021)

Long term relationship between farming damselfish, predators, competitors and benthic habitat on coral reefs of Moorea Island - Feeney, William E.; Frédéric Bertucci; Gairin, Emma; Siu, Gilles; Waqalevu, Viliame; Antoine, Morgan; Lison de Loma, Thierry; Planes, Serge; Galzin, René; Lecchini, David (Scientific Reports, 2021)

Marine artificial reefs, a meta-analysis of their design, objectives and effectiveness - Vivier, Baptiste; Dauvin, Jean-Claude; Navon, Maxime; Anne-Marie Rusig; Isabelle Mussio; Francis Orvain; Boutouil, Mohamed; Pascal Claquin (Global Ecology and Conservation, 2021)

Marine biodiversity of a pristine coral reef in French Polynesia - Lecchini, David; Frédéric Bertucci; Fogg, Lily; Gache, Camille; Ung, Pascal; Lacube, Yann; Berthe, Cécile; Waqalevu, Viliame; Siu, Alain; Bambridge, Tamatoa (Island Studies Journal, 2021)

Marine Transcriptomic Analysis for the Identification of New Antimicrobial Peptides - Houyvet, Baptiste; Bouchon-Navaro, Yolande; Bouchon, Claude; Corre, Erwan; Céline Zatylny-Gaudin (Marine Drugs, 2021)

Maturity of a giant: age and size reaction norm for sexual maturity for Atlantic leatherback turtles - Girondot, Marc; Mourrain, Baptiste; Chevallier, Damien; Godfrey, Matthew H. (Marine Ecology, 2021)

Melatonin and osmoregulation in fish: A focus on Atlantic salmon Salmo salar smoltification - Nisembaum, Laura Gabriela; Martin, Patrick; Lecomte, Frédéric; Falcón, Jack (Journal of Neuroendocrinology, 2021)
Part of the life cycle of several fish species includes important salinity changes, as is the case for the sea bass (Dicentrarchus labrax) or the Atlantic salmon (Salmo salar). Salmo salar juveniles migrate downstream from their spawning sites to reach seawater, where they grow and become sexually mature. The process of preparation enabling juveniles to migrate downstream and physiologically adapt to seawater is called smoltification. Daily and seasonal variations of photoperiod and temperature play a role in defining the timing of smoltification, which may take weeks to months, depending on the river length and latitude. Smoltification is characterised by a series of biochemical, physiological and behavioural changes within the neuroendocrine axis. This review discusses the current knowledge and gaps related to the neuroendocrine mechanisms that mediate the effects of light and temperature on smoltification. Studies performed in S. salar and other salmonids, as well as in other species undergoing important salinity changes, are reviewed, and a particular emphasis is given to the pineal hormone melatonin and its possible role in osmoregulation. The daily and annual variations of plasma melatonin levels reflect corresponding changes in external photoperiod and temperature, which suggests that the hormonal time‐keeper melatonin might contribute to controlling smoltification. Here, we review studies on (i) the impact of pinealectomy and/or melatonin administration on smoltification; (ii) melatonin interactions with hormones involved in osmoregulation (e.g., prolactin, growth hormone and cortisol); (iii) the presence of melatonin receptors in tissues involved in osmoregulation; and (iv) the impacts of salinity changes on melatonin receptors and circulating melatonin levels. Altogether, these studies show evidence indicating that melatonin interacts with the neuroendocrine pathways controlling smoltification, although more information is needed to clearly decipher its mechanisms of action.

The Merits of Loop Analysis for the Qualitative Modeling of Social-Ecological Systems in Presence of Offshore Wind Farms - Nathalie Niquil; Scotti, Marco; Fofack-Garcia, Rhoda; Haraldsson, Matilda; Thermes, Maud; Raoux, Aurore; Le Loc'h, Francois; Mazé, Camille (Frontiers in Ecology and Evolution, 2021)

Molecular and cellular regulation on sex change in hermaphroditic fish, with a special focus on protandrous black porgy, Acanthopagrus schlegelii. - Wu, Guan-Chung; Sylvie Dufour; Chang, Ching-Fong (Mol Cell Endocrinol, 2021)
In teleost fish, sex can be determined by genetic factors, environmental factors, or both. Unlike in gonochoristic fish, in which sex is fixed in adults, sex can change in adults of hermaphroditic fish species. Thus, sex is generated during the initial gonadal differentiation stage (primary sex differentiation) and later during sexual fate alternation (secondary sex differentiation) in hermaphroditic fish species. Depending on the species, sex phase alternation can be induced by endogenous cues (such as individual age and body size) or by social cues (such as sex ratio or relative body size within the population). In general, the fluctuation in plasma estradiol-17β (E2) levels is correlated with the sexual fate alternation in hermaphroditic fish. Hormonal treatments can artificially induce sexual phase alternation in sequential hermaphroditic fishes, but in a transient and reversible manner. This is the case for the E2-induced female phase in protandrous black porgy and the methyltestosterone (MT)- or aromatase inhibitor (AI)-induced male phase in protogynous grouper. Recent reviews have focused on the different forms of sex change in fish who undergo sequential sex change, especially in terms of gene expression and the role of hormones. In this review, we use the protandrous black porgy, a nonsocial cue-influenced hermaphroditic species, with digonic gonads (ovarian and testis separated by a connective tissue), as a model to describe our findings and discuss the molecular and cellular regulation of sexual fate determination in hermaphroditic fish.

Molecular and physiological characterization of a crustacean cardioactive signaling system in a lophotrochozoan - the Pacific oyster (Crassostrea gigas): a role in reproduction and salinity acclimation. - Réalis-Doyelle, Emilie; Julie Schwartz; Marie-Pierre Dubos; Pascal Favrel (J Exp Biol, 2021)
The crustacean cardioactive peptide (CCAP) is an important neuropeptide involved in the regulation of a variety of physiological processes in arthropods. Although this family of peptides has an ancestral origin, its function remains poorly understood among protostome species - apart from arthropods. We functionally characterized three G protein-coupled receptors (GPCRs) in the oyster Crassostrea gigas, phylogenetically related to ecdysozoan CCAP receptors (CCAPRs) and to chordate neuropeptide S receptors (NPSRs). Cragi-CCAPR1 and Cragi-CCAPR2 were specifically activated by the Cragi-CCAP1 and Cragi-CCAP2 peptides, respectively, both derived from the same CCAP precursor. In contrast, Cragi-CCAPR3 was only partially activated by CCAP1 and CCAP2 at high concentrations. The Cragi-CCAPR1 and Cragi-CCAPR2 genes were expressed in various adult tissues. They are both most expressed in the gills, while Cragi-CCAPR3 is mainly expressed in the visceral ganglia (VG). Cragi-CCAP precursor transcripts are higher in the VG, the labial palps and the gills. Receptor and ligand-encoding transcripts are more abundantly expressed in the gonads in the first stages of gametogenesis, while the Cragi-CCAP precursor is upregulated in the VG in the last stages of gametogenesis. This suggests a role of the CCAP signaling system in the regulation of reproductive processes. A role in water and ionic regulation is also supported considering the differential expression of the CCAP signaling components in oysters exposed to brackish water.

Morphostructural data and phylogenetic relationships of a new cnidarian myxosporean infecting spleen of an economic and ecological important bryconid fish from Brazil - Milanin, Tiago; Mathews, Patrick D.; Morandini, André C.; Mertins, Omar; Audebert, Fabienne; Pereira, Jose O.L.; Maia, Antonio A.M. (Microbial Pathogenesis, 2021)

Multi-trophic markers illuminate the understanding of the functioning of a remote, low coral cover Marquesan coral reef food web - Fey, Pauline; Parravicini, Valeriano; Bănaru, Daniela; Dierking, Jan; Galzin, René; Lebreton, Benoît; Tarik Meziane; Polunin, Nicholas V. C.; Zubia, Mayalen; Letourneur, Yves (Scientific Reports, 2021)
We studied the food web structure and functioning of a coral reef ecosystem in the Marquesas Islands, French Polynesia, characterized by low coral cover, high sea surface temperature and meso- to eutrophic waters. The Marquesas constitute a relevant ecosystem to understand the functioning of low diversity reefs that are also subject to global change. A multi-tracer assessment of organic matter pathways was run to delineate ecosystem functioning, using analysis of fatty acids, bulk and compound specific stable isotope analysis and stable isotopes mixing models. Macroalgae and phytoplankton were the two major food sources fueling this food web with, however, some marked seasonal variations. Specifically, zooplankton relied on phytoplankton-derived organic matter and herbivorous fishes on macroalgae-derived organic matter to a much higher extent in summer than in winter (~ 75% vs. ~ 15%, and ~ 70 to 75% vs. ~ 5 to 15%, respectively) . Despite remarkably high δ15N values for all trophic compartments, likely due to local dynamics in the nitrogen stock, trophic levels of consumers were similar to those of other coral reef ecosystems. These findings shed light on the functioning of low coral cover systems, which are expected to expand worldwide under global change.

Mytilus edulis and Styela clava assimilate picophytoplankton carbon through feces and pseudofeces ingestion - Sonier, R.; Comeau, L.A.; Tremblay, R.; Frédéric Olivier; Tarik Meziane; Genard, B. (Aquaculture, 2021)
Picophytoplankton (PPP) may contribute to the bulk of primary production in nutrient-rich marine ecosystems. In this study, we quantified the capacity of blue mussels (Mytilus edulis) and clubbed tunicates (Styela clava) to exploit PPP. In the water, we introduced PPP cells that were isotopically labelled with 13C and using the same enrichment approach, we measured the secondary transfer (recycling) of carbon via the assimilation of pseudofeces and feces. Results show that both M. edulis and S. clava assimilate PPP carbon by ingesting PPP cells directly from water. In addition, PPP assimilation rates were similar in both species. Most interesting was our observation that both species assimilated PPP carbon contained in pseudofeces and feces, including large fecal pellets produced by S. clava. We conclude that within cultured and invasive filter feeders, PPP carbon is recycled via ingestion of feces and pseudofeces among individuals growing in close proximity. In aquaculture settings, cultured bivalves and fouling tunicates may provide an ecological service by removing excess PPP in nutrient-rich systems via direct and secondary ingestion. Keywords: Picophytoplankton, Isotopic labelling, Aquaculture, Feces, Carbon cycling, Blue mussel, Tunicate

Natural History Collections in the Science of the 21st CenturyThe “Cyanobacteria and Microalgae” Collection in the Time of “‐omics” - Duperron, Sébastien; Duval, Charlotte; Sahima Hamlaoui; Comte, Katia; Yéprémian, Claude; Bernard, Cécile (Wiley, 2021)

New Insights on Biodiversity and Conservation of Amphidromous Shrimps of the Indo-Pacific islands (Decapoda: Atyidae: Caridina) - de Mazancourt, V.; Klotz, W.; Marquet, G.; Mos, B.; Rogers, D.C.; Keith, P. (Recent Advances in Freshwater Crustacean Biodiversity and Conservation, 2021)
Amphidromous shrimps of the genus Caridina (Crustacea: Decapoda: Atyidae) are essential components of the tropical insular freshwater ecosystems. Due to an extremely confused taxonomy, their biodiversity is poorly known and their conservation status cannot be properly assessed. However, thanks to recent advances in integrative taxonomy, the systematics of this genus progressively becomes clearer, allowing us to draw conclusions about their biogeography and conservation biology. In this chapter, we (1) review the current state of knowledge of amphidromous Caridina diversity in the light of the latest results of integrative taxonomy, (2) review the threats faced by Caridina in Indo-Pacific Islands, and (3) discuss how integrative taxonomic approaches can inform and support programs designed to limit the impacts of threatening processes on the diversity of Caridina. Finally, we provide recommendations for the conservation of these species and their habitats.

New Insights on Biodiversity and Conservation of Amphidromous Shrimps of the Indo-Pacific islands (Decapoda: Atyidae: Caridina) - de Mazancourt, V.; Klotz, W.; Marquet, G.; Mos, B.; Rogers, D.C.; Keith, P. (Recent Advances in Freshwater Crustacean Biodiversity and Conservation, 2021)
Amphidromous shrimps of the genus Caridina (Crustacea: Decapoda: Atyidae) are essential components of the tropical insular freshwater ecosystems. Due to an extremely confused taxonomy, their biodiversity is poorly known and their conservation status cannot be properly assessed. However, thanks to recent advances in integrative taxonomy, the systematics of this genus progressively becomes clearer, allowing us to draw conclusions about their biogeography and conservation biology. In this chapter, we (1) review the current state of knowledge of amphidromous Caridina diversity in the light of the latest results of integrative taxonomy, (2) review the threats faced by Caridina in Indo-Pacific Islands, and (3) discuss how integrative taxonomic approaches can inform and support programs designed to limit the impacts of threatening processes on the diversity of Caridina. Finally, we provide recommendations for the conservation of these species and their habitats.

A new species of freshwater pipefish (Teleostei: Syngnathidae: Coelonotus) from Papua New Guinea - Vincent Haÿ; Marion Mennesson; Philippe Keith; Clara Lord (Cybium, 2021)
A new species of Coelonotus, a freshwater pipefish, is described on the basis of six specimens from the Gavuvu river of West new Britain Island (Papua new Guinea). It differs from other Coelonotus species by a combination of morphomeristic values including: number of dorsal fin rays (45-47), number of subdorsal (4-5) and tail rings (35-37). the Folmer dna barcode fragment of the COI mitochondrial gene shows that this new species is indeed a different genetic lineage from other Coelonotus species of this area.

A new species of Microphis (Teleostei: Syngnathidae) from Papua New Guinea. - Haÿ, Vincent; Marion Mennesson; Philippe Keith; Clara Lord (Cybium, 2021)

A new species of Schismatogobius (Teleostei: Gobiidae) from Sulawesi (Indonesia). - Philippe Keith; Sauri, S; Busson, Frederic; Delrieu-Trottin, Erwan (Cybium, 2021)

New taxonomic and phylogeographic data on three nominal species of the genus Septaria Férussac, 1807 (Gastropoda: Cycloneritida: Neritidae) - Ahmed Abdou (Zootaxa, 2021)
Due to superficial morphological similarities, there is often confusion in the identification of some species of the genus Septaria. A combined analysis of the genital anatomy, morphometric and DNA, based on a portion of the COI gene, applied to three nominal species of this genus, confirmed the validity of Septaria tahitiana Eichhorst, 2016, and suggested that Septaria borbonica (Bory de Saint Vincent, 1804) is a subspecies of Septaria porcellana (Linnaeus, 1758), both taxa with disjunct distribution areas: Septaria borbonica in the western Indian Ocean and Septaria porcellana the western Pacific and eastern Indian Oceans. The possible presence of Septaria tesselata (Lamarck, 1816) in Mayotte (Comoros Archipelago) needs to be confirmed.
Keywords: Indo-Pacific; mitochondrial DNA; mollusc; Phylogeny; shell morphometrics; taxonomy

North Atlantic warming over six decades drives decreases in krill abundance with no associated range shiftAbstract - Martin Edwards; Pierre Hélaouët; Goberville, Eric; Lindley, Alistair; Tarling, Geraint A.; Burrows, Michael T.; Angus Atkinson (Communications Biology, 2021)
In the North Atlantic, euphausiids (krill) form a major link between primary production and predators including commercially exploited fish. This basin is warming very rapidly, with species expected to shift northwards following their thermal tolerances. Here we show, however, that there has been a 50% decline in surface krill abundance over the last 60 years that occurred in situ, with no associated range shift. While we relate these changes to the warming climate, our study is the first to document an in situ squeeze on living space within this system. The warmer isotherms are shifting measurably northwards but cooler isotherms have remained relatively static, stalled by the subpolar fronts in the NW Atlantic. Consequently the two temperatures defining the core of krill distribution (7–13 °C) were 8° of latitude apart 60 years ago but are presently only 4° apart. Over the 60 year period the core latitudinal distribution of euphausiids has remained relatively stable so a ‘habitat squeeze’, with loss of 4° of latitude in living space, could explain the decline in krill. This highlights that, as the temperature warms, not all species can track isotherms and shift northward at the same rate with both losers and winners emerging under the ‘Atlantification’ of the sub-Arctic.

Not Frozen in the Ice: Large and Dynamic Rearrangements in the Mitochondrial Genomes of the Antarctic Fish - Papetti, Chiara; Babbucci, Massimiliano; Dettai, Agnès; Basso, Andrea; Lucassen, Magnus; Harms, Lars; Céline Bonillo; Heindler, Franz Maximilian; Patarnello, Tomaso; Negrisolo, Enrico (Genome Biology and Evolution, 2021)
The vertebrate mitochondrial genomes generally present a typical gene order. Exceptions are uncommon and important to study the genetic mechanisms of gene order rearrangements and their consequences on phylogenetic output and mitochondrial function. Antarctic notothenioid fish carry some peculiar rearrangements of the mitochondrial gene order. In this first systematic study of 28 species, we analyzed known and undescribed mitochondrial genome rearrangements for a total of eight different gene orders within the notothenioid fish. Our reconstructions suggest that transpositions, duplications, and inversion of multiple genes are the most likely mechanisms of rearrangement in notothenioid mitochondrial genomes. In Trematominae, we documented an extremely rare inversion of a large genomic segment of 5,300 bp that partially affected the gene compositional bias but not the phylogenetic output. The genomic region delimited by nad5 and trnF, close to the area of the Control Region, was identified as the hot spot of variation in Antarctic fish mitochondrial genomes. Analyzing the sequence of several intergenic spacers and mapping the arrangements on a newly generated phylogeny showed that the entire history of the Antarctic notothenioids is characterized by multiple, relatively rapid, events of disruption of the gene order. We hypothesized that a pre-existing genomic flexibility of the ancestor of the Antarctic notothenioids may have generated a precondition for gene order rearrangement, and the pressure of purifying selection could have worked for a rapid restoration of the mitochondrial functionality and compactness after each event of rearrangement.
Keywords: Animals; Antarctic Regions; Evolution, Molecular; Fishes; Freezing; Gene Order; Gene Rearrangement; Genes, Mitochondrial; Genome, Mitochondrial; Genomics; Ice; Models, Genetic; Phylogeny; Vertebrates

A Novel Dop2/Invertebrate-Type Dopamine Signaling System Potentially Mediates Stress, Female Reproduction, and Early Development in the Pacific Oyster (Crassostrea gigas) - Schwartz, Julie; Réalis-Doyelle, Emilie; Le Franc, Lorane; Favrel, Pascal (Marine Biotechnology, 2021)

Observations of Sea Lampreys, attached to Humpback whales, off Saint Pierre and Miquelon archipelago (Northwestern Atlantic) - Urtizberea, Frank; Detcheverry, Joël; Denys, Gaël (Cahiers de Biologie Marine, 2021)
We report the two first observations of Sea Lampreys Petromyzon marinus attached to Humpback whales Megaptera novaeangliae during two whales surveys by boat the 5th September 2012 and 8th July 2020. Their size and marbled coloration certified their species identification. However, the lack of scarring does not allow to affirm a parasite/host relationship. These observations are also the first occurrences of this lamprey species in the exclusive economic zone of the French territory of Saint Pierre and Miquelon archipelago, and will be helpful for French managers.

Observations of sharks (Elasmobranchii) at Europa Island, a remote marine protected area important for shark conservation in the southern Mozambique Channel - Mireille M.M. Guillaume; Séret, Bernard (PLOS ONE, 2021)

Pelagic habitats under the MSFD D1: scientific advice of policy relevance : recommendations to frame problems and solutions for the pelagic habitats’ assessment. - Magliozzi, Chiara; Druon, Jean-Noel; Palialexis, Andreas; Aguzzi, Laura; Alexande, Brittany; Antoniadis, Konstantinos; Artigas, Luis Felipe; Azzellino, Arianna; Bisinicu, Elena; Boicenco, Laura; Bojanic, Natalia; Borrello, Patrizia; et al. (Publications Office of the European Union, 2021)
Pelagic habitats are a policy priority below Descriptor 1 (Biodiversity) of the Marine Strategy Framework Directive (MSFD). They are addressed under the D1C6 criterion, stating “the condition of the habitat type, including its biotic and abiotic structure and its functions…, is not adversely affected due to anthropogenic pressures”. The evaluation of pelagic habitats status is challenged by the functional and structural characteristics of pelagic habitat diversity and processes. To date, pelagic habitats assessments are lacking in common criteria and methodologies that characterize the habitat while accounting for the effects of anthropogenic pressures to achieve the Good Environmental Status (GES). It is therefore necessary to prioritise communication between scientific and policy communities and frame pelagic research to agree on common methods and approaches at regional or EU scale. This is key for achieving harmonised and comparable pelagic assessments for the MSFD. This report summarizes the outcomes on the assessment workflow of pelagic habitats of the JRC “MSFD pelagic habitats” workshop (9th and 10th March 2021), and the need for coordinated evaluations of the scientific challenges of policy relevance. Recommendations on the MSFD implementation of D1C6, that were generated from the experts during the workshop, will be communicated to the MSFD policy groups and the EU Member States competent authorities to support future harmonised assessment of pelagic habitats.

Photoperiodic regulation of pituitary thyroid-stimulating hormone and brain deiodinase in Atlantic salmon - Irachi, Shotaro; Hall, Daniel J.; Fleming, Mitchell S.; Maugars, Gersende; Björnsson, Björn Thrandur; Sylvie Dufour; Uchida, Katsuhisa; McCormick, Stephen D. (Molecular and Cellular Endocrinology, 2021)

Photosynthesis from stolen chloroplasts can support sea slug reproductive fitness - Cartaxana, Paulo; Rey, Felisa; LeKieffre, Charlotte; Lopes, Diana; Cédric Hubas; Spangenberg, Jorge E.; Escrig, Stéphane; Bruno Jesus; Calado, Gonçalo; Domingues, Rosário; Kühl, Michael; Calado, Ricardo; et al. (Proceedings of the Royal Society B: Biological Sciences, 2021)
Some sea slugs are able to steal functional chloroplasts (kleptoplasts) from their algal food sources, but the role and relevance of photosynthesis to the animal host remain controversial. While some researchers claim that kleptoplasts are slowly digestible ‘snacks’, others advocate that they enhance the overall fitness of sea slugs much more profoundly. Our analysis shows light-dependent incorporation of 13C and 15N in the albumen gland and gonadal follicles of the sea slug Elysia timida, representing translocation of photosynthates to kleptoplast-free reproductive organs. Long-chain polyunsaturated fatty acids with reported roles in reproduction were produced in the sea slug cells using labelled precursors translocated from the kleptoplasts. Finally, we report reduced fecundity of E. timida by limiting kleptoplast photosynthesis. The present study indicates that photosynthesis enhances the reproductive fitness of kleptoplast-bearing sea slugs, confirming the biological relevance of this remarkable association between a metazoan and an algal-derived organelle.

Phylogenetic analysis and characterization of a new parasitic cnidarian (Myxosporea: Myxobolidae) parasitizing skin of the giant mottled eel from the Solomon Islands - Mathews, Patrick D.; Céline Bonillo; Nicolas Rabet; Clara Lord; Causse, Romain; Philippe Keith; Audebert, Fabienne (Infection, Genetics and Evolution, 2021)

Pituitary Hormones mRNA Abundance in the Mediterranean Sea Bass Dicentrarchus labrax: Seasonal Rhythms, Effects of Melatonin and Water Salinity - Jack Falcon (Frontiers in Physiology, 2021)
In fish, most hormonal productions of the pituitary gland display daily and/or seasonal rhythmic patterns under control by upstream regulators, including internal biological clocks. The pineal hormone melatonin, one main output of the clocks, acts at different levels of the neuroendocrine axis. Melatonin rhythmic production is synchronized mainly by photoperiod and temperature. Here we aimed at better understanding the role melatonin plays in regulating the pituitary hormonal productions in a species of scientific and economical interest, the euryhaline European sea bass Dicentrarchus labrax. We investigated the seasonal variations in mRNA abundance of pituitary hormones in two groups of fish raised one in sea water (SW fish), and one in brackish water (BW fish). The mRNA abundance of three melatonin receptors was also studied in the SW fish. Finally, we investigated the in vitro effects of melatonin or analogs on the mRNA abundance of pituitary hormones at two times of the year and after adaptation to different salinities. We found that (1) the reproductive hormones displayed similar mRNA seasonal profiles regardless of the fish origin, while (2) the other hormones exhibited different patterns in the SW vs. the BW fish. (3) The melatonin receptors mRNA abundance displayed seasonal variations in the SW fish. (4) Melatonin affected mRNA abundance of most of the pituitary hormones in vitro; (5) the responses to melatonin depended on its concentration, the month investigated and the salinity at which the fish were previously adapted. Our results suggest that the productions of the pituitary are a response to multiple factors from internal and external origin including melatonin. The variety of the responses described might reflect a high plasticity of the pituitary in a fish that faces multiple external conditions along its life characterized by marked daily and seasonal changes in photoperiod, temperature and salinity.
Keywords: annual variations; hormones; melatonin; photoperiod; pituitary; salinity; sea bass

Prokaryotic abundance, cell size and extracellular enzymatic activity in a human impacted and mangrove dominated tropical estuary (Can Gio, vietnam) - Frank David; Tarik Meziane; Marchand, Cyril; Rolland, Guillaume; Pham, Aurélie; Thanh-Nho, Nguyen; Lamy, Dominique (Estuarine, Coastal and Shelf Science, 2021)
Extracellular enzymatic activities constitute the first and limiting step of the whole process of organic matter (OM) cycling in aquatic ecosystems. This study aims to identify the factors controlling prokaryotes ability to hydrolyse OM in an Indo-Pacific tropical mangrove ecosystem (Can Gio, Vietnam). Prokaryotic abundance and leucine-aminopeptidase exo-proteolytic activity (EPA) were measured at vertical (from the sea-surface microlayer to bottom waters), spatial (along a transect within the estuary) and seasonal (wet and dry season) scales. Prokaryotic abundance ranged from 1.2 to 5.7 × 109 cells L−1 and EPA ranged from 24 to 505 nmol L−1 h−1 that was relatively similar to other highly productive ecosystems. The estuary was poorly stratified, most probably because of high water turbulence. Yet, exo-proteolytic activity was significantly higher in bottom waters, where higher loads of suspended particulate matter were measured. Seasonal and spatial differences in EPA suggest that the nature of OM transported by the Can Gio mangrove estuary affect EPA. The latter seems to be increased by two “uncommon” situations: the input of fresh and labile OM (e.g. shrimp farm effluents) or the lack of labile OM and the need to hydrolyse refractory compounds (e.g. during the dry season).

Quantifying Cyanothece growth under DIC limitation - Inomura, Keisuke; Masuda, Takako; Eichner, Meri; Rabouille, Sophie; Zavřel, Tomas; Červený, Jan; Vancová, Marie; Bernát, Gabor; Armin, Gabrielle; Pascal Claquin; Kotabová, Eva; Stephan, Susanne; et al. (Computational and Structural Biotechnology Journal, 2021)

Raising names from the dead: A time-calibrated phylogeny of frog shells (Bursidae, Tonnoidea, Gastropoda) using mitogenomic data. - Sanders, Malcolm T; Merle, Didier; Laurin, Michel; Céline Bonillo; Puillandre, Nicolas (Mol Phylogenet Evol, 2021)
With 59 Recent species, Bursidae, known as «frog shells», are a small but widely distributed group of tropical and subtropical gastropods that are most diverse in the Indo-West Pacific. The present study is aimed at reconstructing phylogenetic relationships of bursid gastropods based on extensive and representative taxon sampling. Five genetic markers (cytochrome c oxidase subunit I (cox1), 16 s and 12 s rRNA mitochondrial genes, 28 s rRNA and Histone H3 nuclear gene) were sequenced for over 30 species in every known genus but Crossata. Furthermore, we sequenced the complete mt-genome of 9 species (10 specimens) (Aspa marginata, Marsupina bufo, Korrigania quirihorai, Korrigania fijiensis, Tutufa rubeta, Bursa lamarckii, Lampasopsis rhodostoma (twice), Bufonaria perelegans and Bursa aff. tuberosissima). Our analysis recovered Bursidae as a monophyletic group, whereas the genus Bursa was found to be polyphyletic. The genera Talisman and Dulcerana are resurrected and the genera Alanbeuella gen. nov. and Korrigania gen. nov. are described. Dating analysis using 21 extinct taxa for node and simplified tip calibrations was performed, showing a diversification of the group in two phases. Diversification may be linked to tectonic events leading to biodiversity relocation from the western Tethys toward the Indo-Pacific.
Keywords: Animals; Bayes Theorem; Calibration; Fossils; Gastropoda; Genes, Mitochondrial; Genome, Mitochondrial; Phylogeny; Sequence Analysis, DNA; Time Factors

Recent Advances in Freshwater Crustacean Biodiversity and ConservationNew Insights on Biodiversity and Conservation of Amphidromous Shrimps of the Indo-Pacific islands (Decapoda: Atyidae: Caridina) - Kawai, Tadashi; Rogers, D. Christopher; Mazancourt, V. de; Klotz, W.; Marquet, G.; Mos, B.; Rogers, D.C.; Philippe Keith (CRC Press, 2021)

Revalidation of the Spanish stone loach Barbatula hispanica (Lelek, 1987) (Teleostei, Nemacheilidae) according to morphological and mitochondrial data - Denys, Gaël; Perea, Silvia; Dettai, Agnès; Gauliard, Camille; Persat, Henri; Doadrio, Ignacio (Annales de Limnologie - International Journal of Limnology, 2021)

Review of Ophiocara (Teleostei: Butidae) from Indo-pacific Islands. - Philippe Keith; Marion Mennesson (Cybium, 2021)

Review of Ophiocara (Teleostei: Butidae) from Indo-Pacific Islands - Philippe Keith; Marion Mennesson (Cybium, 2021)
Révision du genre Ophiocara (Teleostei : Butidae) de la région indopacifique /Review of Ophiocara (Teleostei: Butidae) from Indo-Pacific Islands Des collections de spécimens des Ophiocara provenant de la région indopacifique ont été étudiées. Trois espèces ont été répertoriées selon des approches génétiques et morpho-méristiques. Elles diffèrent par un fort pourcentage de divergence au niveau du gène COI partiel (446 pb) et par plusieurs caractères incluant, principalement, le nombre d’écailles en séries latérale, transverse postérieure, zigzag et prédorsale, et par la longueur de la mâchoire. Ophiocara species from the Indo-Pacific area are reviewed. Three species are recognized using genetic and morphomeristic approaches. The species differ by a high percentage of divergence (around 8%) in partial COI gene (446 bp) and by several characters including the number of scales in lateral, transverse backward, zigzag, and predorsal series, and the jaw length.

Revisiting species and areas of interest for conserving global mammalian phylogenetic diversity - Robuchon, Marine; Pavoine, Sandrine; Véron, Simon; Delli, Giacomo; Faith, Daniel P.; Mandrici, Andrea; Pellens, Roseli; Dubois, Grégoire; Leroy, Boris (Nature Communications, 2021)

The rise and fall of the ancient northern pike master sex-determining gene - Pan, Qiaowei; Feron, Romain; Jouanno, Elodie; Darras, Hugo; Herpin, Amaury; Koop, Ben; Rondeau, Eric; Goetz, Frederick W; Larson, Wesley A; Bernatchez, Louis; Tringali, Mike; Curran, Stephen S; et al. (eLife, 2021)

Saint-Paul and Amsterdam rock lobster stocks Harvest Control Rule - Jules, Selles (2021)

Sargassum contamination and consequences for downstream uses: a review - Devault, Damien A.; Pierre, Ronan; Marfaing, Hélène; Dolique, Franck; Pascal Jean Lopez (Journal of Applied Phycology, 2021)

Sargassum Differentially Shapes the Microbiota Composition and Diversity at Coastal Tide Sites and Inland Storage Sites on Caribbean Islands - Hervé, Vincent; Lambourdière, Josie; René-Trouillefou, Malika; Devault, Damien Alain; Pascal Jean Lopez (Frontiers in Microbiology, 2021)

Sargassum Differentially Shapes the Microbiota Composition and Diversity at Coastal Tide Sites and Inland Storage Sites on Caribbean Islands - Hervé, Vincent; Josie Lambourdière; René-Trouillefou, Malika; Devault, Damien Alain; Pascal Jean Lopez (Front Microbiol, 2021)
Rafts of drifting pelagic that are circulating across the Atlantic Ocean are complex ecosystems composed of a large number of associated species. Upon massive stranding, they lead to various socio-environmental issues including the inflow of contaminants and human health concerns. In this study, we used metabarcoding approaches to examine the differences in both the eukaryotic- and prokaryotic-associated communities from present in two islands of the Lesser Antilles, namely Guadeloupe and Martinique. We detected significant differences in microbial community structure and composition between landing , the surrounding seawater, and from inland storage sites. In total we identified 22,214 prokaryotic and 17,679 eukaryotic OTUs. Among them, functional prediction analyses revealed a number of prokaryotes that might contribute to organic matter decomposition, nitrogen cycling and gas production, including sulfate-reducing bacteria at coastal landing sites, and methanogenic archaea at inland storage sites. We also found that Metazoan was the most abundant group in samples, with nematode clades that presented exclusive or specific richness and abundance patterns depending on their substrate. Together, these molecular inventories of the micro- and meiofauna communities provide baseline information for further characterization of trophic interactions, algal organic matter decomposition and nutrient transfers at coastal and inland storage sites.

Seasonal Variations in the Biodiversity, Ecological Strategy, and Specialization of Diatoms and Copepods in a Coastal System With Phaeocystis Blooms: The Key Role of Trait Trade-Offs - Breton, Elsa; Christaki, Urania; Benoit Sautour; Demonio, Oscar; Skouroliakou, Dimitra-Ioli; Grégory Beaugrand; Seuront, Laurent; Kléparski, Loïck; Poquet, Adrien; Nowaczyk, Antoine; Muriel Crouvoisier; Ferreira, Sophie; et al. (Frontiers in Marine Science, 2021)
Although eutrophication induced by anthropogenic nutrient enrichment is a driver of shifts in community composition and eventually a threat to marine biodiversity, the causes and consequences on ecosystem functioning remain greatly unknown. In this study, by applying a trait-based approach and measuring niche breadth of diatoms and copepods, the drivers and underlying mechanisms of the seasonal species succession of these ecological communities in a coastal system dominated in spring by Phaeocystis blooms were explored. It is suggested that the seasonal succession of diatoms and copepods is the result of several trade-offs among functional traits that are controlled by the seasonal abiotic and biotic pressure encountered by the plankton communities. The results of this study highlight that a trade-off between competition and predator, i.e., weak competitors are better protected against predation, plays an important role in promoting plankton species richness and triggers the Phaeocystis bloom. As often observed in eutrophicated ecosystems, only the biotic homogenization of the copepod community and the shift in the diet of copepods toward Phaeocystis detrital materials have been detected during the Phaeocystis bloom. The diatom and copepod communities respond synchronously to fluctuating resources and biotic conditions by successively selecting species with specific traits. This study confirms the key role of competition and predation in controlling annual plankton succession.

Short communication: Amphidromous goby postlarvae (penja) migration seasons and fisheries in West Sulawesi, Indonesia - Nurjirana, Nurjirana; Burhanuddin, Andi I; Philippe Keith; Haris, Abdul; Afrisal, Muhammad (Biodiversitas Journal of Biological Diversity, 2021)

Singular physiological behavior of the scleractinian coral Porites astreoides in the dark phase - Pascal Claquin; René-Trouillefou, Malika; Pascal Jean Lopez; Japaud, Aurélien; Yolande Bouchon-Navaro; Sébastien Cordonnier; Claude Bouchon (Coral Reefs, 2021)
Unlike most other corals that have been declining since the 1980s, the population of Porites astreoides, one of the dominant species of coral in Caribbean reefs, appears to be resilient. We investigated the physiological regulation of the electron transport chain of Symbiodiniaceae chloroplasts during the light / dark transition in P. astreoides compared to nine other common scleractinian corals. Protocols were applied to coral samples in seawater tanks and in situ. The maximum quantum yield (Fv/Fm) in the dark and the effective photochemical efficiency (Fq’/Fm’) in the light were measured during light-dark transitions, and alternative electron flow (AEF) mechanisms were evaluated using fluorescence variation in response to serial irradiation pulses (SIP-protocol). The variation in Fv/Fm (ΔYIImax) was calculated after 3 min or 2 h of dark acclimation (ΔYIImax(2h); ΔYIImax(3min)). The three species that belong to the genus Porites (P. astreoides, P. divaricata, P. furcata) showed plastoquinone reduction (PQ) in response to the SIP protocol, unlike all the other species tested. A marked decrease in Fv/Fm (ΔYIImax(2h) = 47.79%) was observed in P. astreoides in the dark whereas the average ΔYIImax(2h) of the other species tested was 0.677%. The decrease in ΔYIImax in P. astreoides was due to a significant increase in Fo (ΔFo(2h) = -108.64% ± SD 21.48) whereas Fm remained relatively stable. The increase in Fo was attributed to reduction of the PQ pool through a chlororespiration-like mechanism known to reduce the production of reactive oxygen species (ROS). This mechanism was triggered immediately after exposure to the dark, while a brief and moderate light exposure reversed it. Given the ecological success of P. astreoides, we suggest that the high antioxidant capability of this species in the dark phase could be one of the factors favoring its survival in the face of various environmental and anthropogenic threats.
Keywords: Caribbean reef corals; chlororespiration-like; PAM; resilience

Small- and large-scale processes including anthropogenic pressures as drivers of gastropod communities in the NE Atlantic coast: A citizen science based approach - Serranito, Bruno; Diméglio, Tristan; Frédéric Ysnel; Lizé, Anne; Eric Feunteun (Science of The Total Environment, 2021)