@article {9004, title = {Decoupling carry-over effects from environment in fish nursery grounds}, journal = {Science of The Total Environment}, volume = {857}, year = {2023}, month = {Jan-01-2023}, pages = {159487}, abstract = {Life-history trait expression not only depends on the current environmental constraints, but also on the past ones that shaped traits expressed earlier in life. Such an effect, named carry-over, can occur in fish nursery grounds when juvenile performances after settlement are influenced by their larval traits in combination with conditions experienced in nurseries. To date, the impacts of environmental and human stressors on post-settlement traits have been assessed, but independently from larval traits, so that the contributions of environmental versus carry-over constraints remain unquantified. Here, we used a reconstructive approach based on otolith microstructure to investigate how carry-over and environment affect life-history traits of the European seabass,\ Dicentrarchus labrax. In the northeast Atlantic Ocean, seabass juveniles were collected in six French estuarine nursery areas with contrasted environmental conditions (water temperature, salinity, food availability, and anthropogenic impacts), and five of their life-history traits across ontogenetic stages were measured (pelagic growth, larval duration, size at settlement, post-settlement growth and body condition). Piecewise structural equation model emphasized the strong co-variation of larval traits in response to food availability and temperature in the pelagic environment, stressing that fast growing larvae are characterized by shorter pelagic larval duration, but larger size at recruitment. However, the magnitude of carry-over effects greatly varied between traits, revealing that larval trait impacts on post-settlement traits remained minor as compared to the nursery environment. In estuarine nurseries, our findings suggest that resource allocation results from a trade-off between somatic growth and energy storage. Fish juveniles exposed to anthropogenic stress or risk of food limitation tended to predominantly invest in storage, whereas individuals in favourable conditions allocated their resources in somatic growth. These findings highlight the importance of heterogeneity in pelagic and nursery environments in understanding trait variations and population dynamic of estuarine dependent fish.}, issn = {00489697}, doi = {10.1016/j.scitotenv.2022.159487}, url = {https://linkinghub.elsevier.com/retrieve/pii/S004896972206586X}, author = {Teichert, Nils and Liz{\'e}, Anne and Cabral, Henrique and Acou, Anthony and Trancart, Thomas and Virag, Laure-Sarah and Feunteun, Eric and Alexandre Carpentier} } @article {9003, title = {European flounder foraging movements in an estuarine nursery seascape inferred from otolith microchemistry and stable isotopes}, journal = {Marine Environmental Research}, volume = {182}, year = {2022}, month = {Jan-12-2022}, pages = {105797}, abstract = {Despite the importance of estuarine nurseries in the regulation of many fish stocks, temporal and spatial movements and habitat use patterns of juvenile fish remain poorly understood. Overall, combining several movement metrics allowed us to characterize dispersal patterns of juvenile flounder,\ Platichthys flesus,\ along an estuarine seascape. Specifically, we investigated otolith microchemistry signatures (Sr:Ca and Ba:Ca ratios) and stable isotope ratios (δ13C and δ15N) in muscles of these juveniles, during three consecutive years to assess inter-annual fluctuations in their home range and isotopic niches. The morphological condition and lipid content of individuals were lower in years of high as compared to low dispersal along the estuarine gradient. We discuss these results in relation to the ecosystem productivity and intra- and inter-specific competition level, which in turn affects movements and foraging behaviors of juvenile flounders.}, issn = {01411136}, doi = {10.1016/j.marenvres.2022.105797}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0141113622002422}, author = {Teichert, Nils and Liz{\'e}, Anne and Tabouret, H{\'e}l{\`e}ne and Roussel, Jean-Marc and Bareille, Gilles and Trancart, Thomas and Acou, Anthony and Virag, Laure-Sarah and Pecheyran, Christophe and Alexandre Carpentier and Feunteun, Eric} } @article {8752, title = {Modelling past migrations to determine efficient management rules favouring silver eel escapement from a large regulated Floodplain Lake}, journal = {Journal for Nature Conservation}, volume = {67}, year = {2022}, month = {Jan-06-2022}, pages = {126192}, abstract = {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}, issn = {16171381}, doi = {10.1016/j.jnc.2022.126192}, url = {https://linkinghub.elsevier.com/retrieve/pii/S1617138122000656}, author = {Bourgeaux, Jacques and Teichert, Nils and Gillier, Jean-Marc and Danet, Valentin and Eric Feunteun and Acou, Anthony and Charrier, Fabien and Mazel, Virgile and Alexandre Carpentier and Trancart, Thomas} } @article {9036, title = {Modelling the distribution of vulnerable skate from fisheries dependent data using imperfect detection}, journal = {Progress in Oceanography}, volume = {206}, year = {2022}, month = {Jan-08-2022}, pages = {102859}, issn = {00796611}, doi = {10.1016/j.pocean.2022.102859}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0079661122001185}, author = {Bisch, Ama{\"e}lle and Elliott, Sophie A.M. and Alexandre Carpentier and Acou, Anthony} } @article {8599, title = {A multi-approach study to reveal eel life-history traits in an obstructed catchment before dam removal}, journal = {Hydrobiologia}, year = {2022}, month = {Sep-03-2022}, abstract = {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}, issn = {0018-8158}, doi = {10.1007/s10750-022-04833-9}, url = {https://link.springer.com/10.1007/s10750-022-04833-9}, author = {Teichert, Nils and Liz{\'e}, Anne and Tabouret, H{\'e}l{\`e}ne and G{\'e}rard, Claudia and Bareille, Gilles and Acou, Anthony and Alexandre Carpentier and Trancart, Thomas and Virag, Laure-Sarah and Robin, Emma and Druet, Morgan and Prod{\textquoteright}Homme, Jordan and Eric Feunteun} } @article {9037, title = {Spatio-temporal patterns in stable isotope composition of a benthic intertidal food web reveal limited influence from salt marsh vegetation and green tide}, journal = {Marine Environmental Research}, volume = {175}, year = {2022}, month = {Jan-03-2022}, pages = {105572}, issn = {01411136}, doi = {10.1016/j.marenvres.2022.105572}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0141113622000174}, author = {Sturbois, A. and Riera, P. and Desroy, N. and Br{\'e}bant, T. and Alexandre Carpentier and Ponsero, A. and Schaal, G.} } @article {9038, title = {Stable Isotope Trajectory Analysis ( SITA ): A new approach to quantify and visualize dynamics in stable isotope studies}, journal = {Ecological Monographs}, volume = {92}, year = {2022}, month = {Jan-05-2022}, issn = {0012-9615}, doi = {10.1002/ecm.v92.210.1002/ecm.1501}, url = {https://onlinelibrary.wiley.com/toc/15577015/92/2}, author = {Sturbois, Anthony and Cucherousset, Julien and De C{\'a}ceres, Miquel and Desroy, Nicolas and Riera, Pascal and Alexandre Carpentier and Quillien, Nolwenn and Grall, Jacques and Espinasse, Boris and Cherel, Yves and Schaal, Gauthier} } @article {9035, title = {Stomach content and stable isotope analyses provide complementary insights into the trophic ecology of coastal temperate bentho-demersal assemblages under environmental and anthropogenic pressures}, journal = {Marine Environmental Research}, volume = {182}, year = {2022}, month = {Jan-12-2022}, pages = {105770}, issn = {01411136}, doi = {10.1016/j.marenvres.2022.105770}, url = {https://linkinghub.elsevier.com/retrieve/pii/S014111362200215X}, author = {Sturbois, A. and Cozic, A. and Schaal, G. and Desroy, N. and Riera, P. and Le Pape, O. and Le Mao, P. and Ponsero, A. and Alexandre Carpentier} } @article {6724, title = {Microbial functional structure and stable isotopic variation of leptocephali across three current zones in the western South Pacific}, journal = {Progress in Oceanography}, volume = {182}, year = {2020}, pages = {102264}, abstract = {The ecology of leptocephali remains poorly known but they appear to feed on marine snow that can vary spatially and temporally according to the food web dynamics. This study provided new information about the position of leptocephali within the functional structure of microbial plankton and other food web components of the western South Pacific (WSP) region at a large geographic scale including the New Caledonia, Fiji, and Samoa islands. The hydrographic structure varied with latitude, and nutrient levels were generally low but somewhat variable. Stable isotopic signatures were examined in relation to the 3 current zones of the eastward flowing South Equatorial Countercurrent (SECC; north), the westward South Equatorial Current (SEC; mid-latitudes), and the eastward South Tropical Countercurrent (STCC; south), and all zones were found to be primarily based on a heterotrophic planktonic functioning that were co-limited by inorganic nitrogen and phosphorus, with biomasses of planktonic groups varying with depth. Isotopic signatures of leptocephali were compared to the signatures of other mesozoplankton, micronekton, and Trichodesmium components of the food web, and in relation to the signatures of particulate organic matter (POM) that varied among the 3 collection depths. The isotopic signatures of six taxa of leptocephali, other taxonomic groups and POM showed interesting variability according to latitude and among some stations. The presence of Trichodesmium at the surface in the STCC zone influenced the isotopic signatures of POM and thus the signatures of leptocephali. The signatures of leptocephali were therefore linked with the overall food web and were consistent with the larvae feeding on marine snow components of POM. The two apparent groups of leptocephali with different isotopic signatures that have also been observed in other oceanic areas may be explained by feeding behavior at different depths or on different types of marine snow.}, keywords = {Isotopic signature, Leptocephali, Meso-macro-zooplankton, Microbial loop, Micronekton, POM, Western South Pacific}, issn = {0079-6611}, doi = {10.1016/j.pocean.2020.102264}, url = {http://www.sciencedirect.com/science/article/pii/S0079661120300021}, author = {Leopold Ghinter and Christine Dupuy and Michael J. Miller and Alexandre Carpentier and Christel Lefran{\c c}ois and Anthony Acou and Jun Aoyama and Mari Kuroki and Li{\'e}nart, Camilla and Shun Watanabe and Katsumi Tsukamoto and Tsuguo Otake and Eric Feunteun} } @article {7026, title = {Towards transferability in fish migration models: A generic operational tool for predicting silver eel migration in rivers}, journal = {Science of The Total Environment}, volume = {739}, year = {2020}, month = {Jan-10-2020}, pages = {140069}, abstract = {In the global context of river fragmentation, predicting fish migration is urgent to implement management actions aimed at protecting and promoting the free movement of diadromous fish. However, large-scale applicability of conservation measures requires transferable models that enable prediction of migration even in data-poor regions. Here, we surveyed 12 contrasted European river sites to predict the activity peaks of silver eels (Anguilla anguilla) during river migration towards spawning areas through an ensemble modelling approach. Site-specific Boosted Regression Tree (BRT) models were adjusted using standardized hydrological variables to predict migration probability, which were aggregated in consensus predictions. Results of independent cross-validations demonstrated that silver eel migration runs were accurately predicted in response to changes in river discharge. Transferability and predictive performance were improved by considering catchment-size dissimilarity between river sites (85 to 109 930 km{\texttwosuperior}) when combining the site-specific predictions. Nevertheless, we provided two examples for which the effects of human actions on flow conditions were so high that they prevented reliable predictions of migration runs. Further contributions should thus take advantage of the flexibility of our approach for updating model collection with new sites to extend the predictive performance under a larger range of ecological conditions. Our transferable hydrological-based modelling framework offers an opportunity to implement large-scale management strategies for eel conservation, even in rivers where eel monitoring data lack. The BRT models and prediction functions were compiled in an R package named {\textquoteleft}silvRpeak{\textquoteright} to facilitate operational implementation by end-user managers, which can determine when mitigation measures should be implemented to improve river continuity (e.g. turbine shutdown and sluice gate opening) and balance their economic activity towards eel conservation. The only input required is discharge records that are widely available across European hydrological stations.}, keywords = {eel runs prediction, ensemble modelling, European eel management, fish migration, model transferability, river obstacle}, issn = {00489697}, doi = {10.1016/j.scitotenv.2020.140069}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0048969720335890}, author = {Teichert, Nils and T{\'e}tard, St{\'e}phane and Thomas Trancart and de Oliveira, Eric and Anthony Acou and Alexandre Carpentier and Bourillon, Bastien and Eric Feunteun} } @article {6730, title = {When {\textquotedblleft}safe{\textquotedblright} dams kill: Analyzing combination of impacts of overflow dams on the migration of silver eels}, journal = {Ecological Engineering}, volume = {145}, year = {2020}, pages = {105741}, abstract = {1. The drastic decline in European eel\ Anguilla anguilla\ stock is now widely recognized. However, while various causes for this decline have been identified, the relative importance of each cause remains unclear.

2. During the catadromous migration of silver eels, the negative impact of dams is frequently highlighted, but mainly for powered dams (with turbines) or where connectivity is completely ruptured. Mechanical impact due to turbine blades is often considered the most important cause of mortality of silver eels during downstream migration. Consequently, non-powered dams equipped with spillways are often considered safe for the passage of migrating silver eels.

3. We hypothesized that, to understand the negative impacts of dams, a much wider context must be considered than turbine mortality alone. Using an acoustic telemetry survey of silver eels, we demonstrated the negative effects of non-powered dams on downstream migration.

4. Five main impacts on eel populations were highlighted: (i) the attenuation or loss of triggering factors, leading to an absence of or delay in migration; (ii) extra delays and extra distances travelled when crossing the dam; (iii) extra energetic costs of the additional distance travelled as result of exploring the dam and the reservoir to find other escape passages; (iv) the selection of a more risky behavioral phenotype, i.e., bold eels; and (v) direct blocking once migration has started. Mortality was evaluated as a supplementary impact. Some of these effects (attenuation of triggers, extra delays to cross the dam) might be more important than the same effect from powered dams, probably due to the constant high water discharge required for turbines that facilitate the passage of eels.

5. As these {\textquotedblleft}safe{\textquotedblright} dams are very widespread, they must be considered a potential threat to effective eel conservation.}, keywords = {Acoustic telemetry, Migration, mortality, Non-powered dams, Silver eels, Turbines drinking water intake}, issn = {0925-8574}, doi = {https://doi.org/10.1016/j.ecoleng.2020.105741}, url = {http://www.sciencedirect.com/science/article/pii/S092585742030029X}, author = {Thomas Trancart and Alexandre Carpentier and Anthony Acou and Fabien Charrier and Virgile Mazel and Valentin Danet and Eric Feunteun} } @article {6742, title = {Behaviour of endangered European eels in proximity to a dam during downstream migration: Novel insights using high accuracy 3D acoustic telemetry}, journal = {Ecology of Freshwater Fish}, volume = {29}, year = {2019}, pages = {266-279}, abstract = {River infrastructures such as weirs, hydropower stations or water reservoirs represent obstructions to migration for diadromous fish. Knowledge of accurate behaviour of fish in front of such structures is required to protect migrants from hazardous areas, guide them towards safe passage or adapt structure to improve the escapement. We developed and made available a method to process acoustic telemetry data based on Time Difference Of Arrival analysis to accurately locate tagged fish. Improved accuracy allows the detection of escape routes and description of dam-crossing tactics. Sixteen tagged eels were tracked with high accuracy (1{\textendash}2\ m) and 1 location min-1 frequency during their exploration period on reaching the dam. Two migration routes (spillways and bottom compensation flow pipe) were used by 77\% and 23\% of eels respectively. Spillways were the preferred route, but a median of 16\ days were required to pass the dam versus 1.1\ days via the compensation pipe. A minimal water crest of 40\ cm was required for passage via spillways. Eels passing through the compensation pipe were exclusively nocturnal and mainly explored the bottom of the dam. Eels passing through spillways explored the whole dam area by night and day, and were not attracted to the compensation pipe entrance. With global warming, more frequent drought periods are expected, potentially leading to decreased opportunities for eels to migrate across safer dams by spillways. To conserve this endangered species, dam management strategies that account for expected hydrologic conditions and distinct exploration behaviours are needed.}, keywords = {3D acoustic telemetry, dam, diadromous fish, downstream migration, European eel}, doi = {10.1111/eff.12512}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1111/eff.12512}, author = {Thomas Trancart and Alexandre Carpentier and Anthony Acou and Danet, Valentin and Elliott, Sophie and Eric Feunteun} } @article {6734, title = {Distribution and life history trait models indicate vulnerability of skates}, journal = {Progress in Oceanography}, volume = {181}, year = {2019}, pages = {102256}, abstract = {Elasmobranchs are k-strategy species with low reproduction rate and slow growth lending to increased anthropogenic vulnerability. Specific management measures to improve the conservation of elasmobranchs can be problematic due to insufficient information on their biology and ecology. Here, three sympatric skates occupying north-eastern Atlantic waters, which have differing conservation status were studied within ICES divisions 4.c, 7.d{\textendash}e, 7.f{\textendash}h and 8a{\textendash}b and d. Fisheries-dependent data on skate bycatch and a series of environmental variables were used to model spatio-temporal differences in habitat use between the three species. Raja undulata, the undulate ray (IUCN red listed as {\textquoteleft}Endangered{\textquoteright}) was observed to have a coastal distribution within the English Channel and the Bay of Biscay (ICES division 7.d{\textendash}e and 8.a{\textendash}b). Raja clavata, the thornback ray ({\textquoteleft}Near threatened{\textquoteright}), had a broader distribution with higher presence in the eastern English Channel and the southern North Sea (ICES division 7.e and 4.c). Raja montagui, the spotted ray{\textquoteright}s probability of presence ({\textquoteleft}Least concerned{\textquoteright}) was higher off the coast of southern Ireland (ICES division 7.g). Seasonal and life-history trait differences were also observed. From the fisheries-dependent data, wider skate distributions than previously studied were modelled. Although the species do co-occur, spatio-temporal differences between these species were observed. This study contributes to a greater understanding of skate habitat during their different life history stages, and indicates reasons for R. undulata{\textquoteright}s increased vulnerability than R. clavata and R. montagui. Information from the distribution models could be used for specific spatio-temporal management measures. Better understanding of the distribution of species can also help reduce bycatch of protected species such as R. undulata.}, keywords = {Distribution modelling, Elasmobranchs, Fisheries management, Habitat, IUCN red list species, Life history traits}, issn = {0079-6611}, doi = {https://doi.org/10.1016/j.pocean.2019.102256}, url = {http://www.sciencedirect.com/science/article/pii/S0079661119304367}, author = {Sophie A.M. Elliott and Alexandre Carpentier and Eric Feunteun and Thomas Trancart} } @article {6751, title = {Migration behaviour and escapement of European silver eels from a large lake and wetland system subject to water level management (Grand-Lieu Lake, France): New insights from regulated acoustic telemetry data}, journal = {Ecology of Freshwater Fish}, volume = {27}, year = {2018}, pages = {570-579}, abstract = {Current knowledge about the downstream migration of sexually mature European eels (Anguilla\ anguilla) remains incomplete, particularly in still water habitats such as lakes and wetlands subject to water level management. However, for the management of this endangered species, it is important to understand migration dynamics, and contribution to the breeding stock. This study aimed to assess the parameters that trigger and guide the migration of silver eels in the largest floodplain lake and associated wetlands in France (the sluice regulated Grand-Lieu Lake). A telemetry survey of 50 acoustic and PIT-tagged female silver eels was performed during the 2015{\textendash}2016 migration period. We deployed a novel telemetric approach, using receivers to delimit several restricted virtual boxes to determine the instantaneous location of individuals and to transform simple discrete telemetric data into presence/absence data. The low numbers leaving the lake centre are probably explained by the lack of orienting water flows or other environmental clues, but whilst the fate of 34\% (17/50) of the tagged eels is unknown, 18\% (9/50) were caught by commercial fishermen. Modelling showed that detections were not clearly associated with environmental factors typically involved in riverine migrations (e.g. current velocity, atmospheric pressure and temperature) but they were particularly associated with higher and increasing water levels and, for eels exiting the lake, a sharp increase when sluice gates were opened to an effective gap of \>75\ cm. It is concluded that management of water levels and sluice gate opening during the migration period might aid escapement of silver eels.}, keywords = {Anguilla~anguilla, cues, silver eel migration, triggers}, doi = {10.1111/eff.12371}, url = {https://onlinelibrary.wiley.com/doi/abs/10.1111/eff.12371}, author = {Thomas Trancart and Eric Feunteun and Danet, Valentin and Alexandre Carpentier and Mazel, Virgile and Charrier, Fabien and Druet, Morgan and Anthony Acou} } @article {6746, title = {Stable isotopes as tracers can reveal resource allocation in juvenile golden gray mullets (Liza aurata, Risso, 1810)}, journal = {Journal of Experimental Marine Biology and Ecology}, volume = {503}, year = {2018}, month = {Jan-06-2018}, pages = {72 - 79}, abstract = {Studies on the nutritional physiology of predator fish in the marine environment have contributed to our understanding of how they adapt to the environment and how they have evolved. Despite the fact that herbivorous and omnivorous fish species are numerous and play a significant role in the ecosystem, there is little information on how they process nutrients and how these are allocated to different tissues. This information could be particularly important for the juvenile stages, when small-sized fish are under high predation pressure and have a limited capability to intake and digest large quantities of food. The mullet Liza aurata ingests surface sediment and obtains its nutritional requirements from the organisms associated with the sediment, including microalgae and bacteria or small invertebrates. This paper examines how the carbon and nitrogen derived from benthic micro-organisms are allocated to the liver and muscle tissues of newborn (young-of-the-year, YOY) and one-year-old (OYO) individuals. After the animals were left feeding on 13C-enriched microalgae and 15N-enriched bacteria for 1 h, we traced the 13C and 15N in the liver and muscle tissues as well as in the blood and the gut. The YOY allocated 99\% of the 13C and 88\% of the 15N to the muscles, while the liver had a negligible amount of tracers (0.4\% and 11\% for 13C and 15N). Conversely, in the OYO experiment, the tracers were uniformly distributed throughout the muscle and liver (57\% of 13C and 45\% of 15N were found in the muscle, whereas 43\% of 13C and 55\% of 15N were in the liver). Negligible amounts were traced in the blood (\<0.1\%), while a part of the tracers was not assimilated and remained in the gut of both YOY and OYO fish. These results indicated a size-related shift in resource allocation during first year of growth of L. aurata, probably related to changes in the survival strategies among juveniles. Our results also indicated that stable isotope enrichment can be a helpful tool for studying resource allocation in fish.}, issn = {00220981}, doi = {10.1016/j.jembe.2018.01.009}, url = {https://www.sciencedirect.com/science/article/pii/S0022098117301971}, author = {Como, S. and Alexandre Carpentier and Rossi, F. and Christine Dupuy and Richard, P. and Eric Feunteun and Lefran{\c c}ois, C.} } @proceedings {7892, title = {Le Mont-Saint-Michel et sa baie peuvent-ils se r{\'e}concilier ?}, volume = {12, s{\'e}rie 3}, year = {2017}, month = {2019}, pages = {103-112}, edition = {Documents Phytosociologiques}, author = {Canard, Alain and Prigent, Lionel and Fr{\'e}d{\'e}ric Ysnel and Robin, Thierry and Alexandre Carpentier and Lefeuvre, Jean-Claude and Bioret, Fr{\'e}d{\'e}ric} } @article {Trancart20169, title = {Difference in responses of two coastal species to fluctuating salinities and temperatures: Potential modification of specific distribution areas in the context of global change}, journal = {Estuarine, Coastal and Shelf Science}, volume = {173}, year = {2016}, note = {cited By 3}, pages = {9-15}, doi = {10.1016/j.ecss.2016.02.012}, url = {https://www.sciencedirect.com/science/article/pii/S0272771416300555} } @article {4226, title = {Geographic variation in stable isotopic and fatty acid composition of anguilliform leptocephali and particulate organic matter in the South Pacific}, journal = {Marine Ecology and Progress Series}, volume = {544}, year = {2016}, pages = {225-241}, abstract = {

The feeding ecology of leptocephali has remained poorly understood because they apparently feed on particulate organic matter (POM), which varies in composition, and it is unclear which components of the POM they assimilate. The δ13C and δ15N stable isotope (SI) and fatty acid (FA) compositions of 3 families of leptocephali and POM were compared in 3 latitudinal current zones of the western South Pacific. The δ15N signatures of leptocephali and POM overlapped, with both having their lowest values in the southern current zone. POM in general (across all zones) contained 38 FAs and was rich in saturated FAs (SFA) (16:0, 18:0, 14:0), while leptocephali contained 50 FAs, with high proportions of 16:0, and higher contributions of 22:6ω3, 20:5ω3, 18:1ω9, 16:1ω7 and other FAs than found in the POM. Serrivomeridae leptocephali in the north had higher δ15N signatures and were also distinguished from Nemichthyidae and Muraenidae larvae by their FA compositions (higher SFAs, lower 22:6ω3 and 20:5ω3). Although SI signatures of the Serrivomeridae larvae did not clearly vary with size, 16:0 and 18:0 FA proportions decreased with increasing larval size, and 22:6ω3 and 16:1ω7 increased in larger larvae. Correspondences between the latitudinal variations in nitrogen SI signatures and FA compositions of POM with those of leptocephali and the presence of FA markers of both autotrophic and heterotrophic organisms were consistent with leptocephali feeding on POM. POM can contain various materials from primary producers and heterotrophic microorganisms, but differences in the SI signatures and FA compositions in leptocephali remain to be explained through further research.

}, keywords = {Leptocephali {\textperiodcentered} Fatty acids {\textperiodcentered} Stable isotopes {\textperiodcentered} Biomarkers {\textperiodcentered} Trophic ecology {\textperiodcentered} Oceanic currents}, isbn = {doi:10.3354/meps11575 }, author = {Li{\'e}nart, Camilla and Eric Feunteun and Miller, M J and Aoyama, J and Jean-Michel Mortillaro and C{\'e}dric Hubas and Kuroki, M and Watanabe, S and Christine Dupuy and Alexandre Carpentier and Otake, T and Tsukamoto, K and Tarik Meziane} } @article {Trancart2015168, title = {The effect of thermal shock during diel vertical migration on the energy required for oceanic migration of the European silver eel}, journal = {Journal of Experimental Marine Biology and Ecology}, volume = {463}, year = {2015}, note = {cited By 2}, pages = {168-172}, doi = {10.1016/j.jembe.2014.12.004}, url = {https://www.sciencedirect.com/science/article/pii/S0022098114003190} } @article {3659, title = {{Individual repeatability of foraging behaviour in a marine predator, the great cormorant, Phalacrocorax carbo}}, journal = {Animal Behaviour}, volume = {103}, year = {2015}, pages = {83{\textendash}90}, abstract = {Intrapopulation variability, especially individual foraging specialization, has been investigated in many species. Nevertheless, the repeatability of foraging behaviour remains poorly understood. In particular, whether individuals differ in their respective degrees of repeatability still remains to be determined. Here, we estimated foraging behaviour repeatability in the great cormorant, at both the population and the individual levels, and assessed the effect of repeatability on individual foraging performance. At the population level, we found that some foraging variables were more repeatable (e.g. departure angle and trip duration) than others (e.g. time spent underwater per trip). At the individual level, we found differences in the degree of repeatability for each foraging variable, highlighting the presence of both highly flexible and highly consistent individuals in the population. The effect of repeatability on individual performance depended on the considered timescale: individual-level repeatability of time spent underwater per dive was negatively related to foraging efficiency while individual-level repeatability of time spent underwater per trip was positively related to foraging efficiency. Overall, our study demonstrates the importance of studying repeatability at the individual level and shows how both flexibility and consistency in animal behaviour shape their ability to extract energy from the environment.}, keywords = {behavioural consistency, foraging efficiency, individual flexibility, individual repeatability, piscivorous bird}, issn = {00033472}, doi = {10.1016/j.anbehav.2015.02.008}, url = {http://www.sciencedirect.com/science/article/pii/S0003347215000652}, author = {Potier, Simon and Alexandre Carpentier and Gr{\'e}millet, David and Leroy, Boris and Lescro{\"e}l, Am{\'e}lie} } @article {Laugier2015237, title = {Life history of the Small Sandeel, Ammodytes tobianus, inferred from otolith microchemistry. A methodological approach}, journal = {Estuarine, Coastal and Shelf Science}, volume = {165}, year = {2015}, note = {cited By 6}, pages = {237-246}, doi = {10.1016/j.ecss.2015.05.022}, url = {https://www.sciencedirect.com/science/article/pii/S0272771415001717} } @article {Feunteun201569, title = {Stable isotopic composition of anguilliform leptocephali and other food web components from west of the Mascarene Plateau}, journal = {Progress in Oceanography}, volume = {137}, year = {2015}, note = {cited By 14}, pages = {69-83}, doi = {10.1016/j.pocean.2015.05.024}, url = {https://www.sciencedirect.com/science/article/pii/S0079661115001299} } @article {Carpentier201486, title = {Feeding ecology of Liza spp. in a tidal flat: Evidence of the importance of primary production (biofilm) and associated meiofauna}, journal = {Journal of Sea Research}, volume = {92}, year = {2014}, note = {cited By 25}, pages = {86-91}, doi = {10.1016/j.seares.2013.10.007}, url = {https://www.sciencedirect.com/science/article/pii/S1385110113002013} } @article {Saint-B{\'e}at2014144, title = {How does the resuspension of the biofilm alter the functioning of the benthos-pelagos coupled food web of a bare mudflat in Marennes-Ol{\'e}ron Bay (NE Atlantic)?}, journal = {Journal of Sea Research}, volume = {92}, year = {2014}, note = {cited By 17}, pages = {144-157}, doi = {10.1016/j.seares.2014.02.003}, url = {https://www.sciencedirect.com/science/article/pii/S138511011400029X} } @article {5051, title = {How does the resuspension of the biofilm alter the functioning of the benthos{\textendash}pelagos coupled food web of a bare mudflat in Marennes-Ol{\'e}ron Bay (NE Atlantic)?}, journal = {Journal of sea research}, volume = {92}, year = {2014}, pages = {144{\textendash}157}, author = {Saint-B{\'e}at, B and Christine Dupuy and Agogue, Helene and Alexandre Carpentier and Chalumeau, J and Como, Serena and David, Val{\'e}rie and Margot de Crignis and Duch{\^e}ne, J C and Fontaine, C and others} } @article {8462, title = {Accuracy of pitfall traps for monitoring populations of the amphipod Orchestia gammarella (Pallas 1766) in saltmarshes}, journal = {Estuarine, Coastal and Shelf Science}, volume = {113}, year = {2012}, month = {Jan-11-2012}, pages = {314 - 316}, issn = {02727714}, doi = {10.1016/j.ecss.2012.07.022}, url = {https://linkinghub.elsevier.com/retrieve/pii/S0272771412002922}, author = {Mantzouki, Evanthia and Fr{\'e}d{\'e}ric Ysnel and Alexandre Carpentier and P{\'e}tillon, Julien} }