@article {9646, title = {An integrative taxonomic revision of the freshwater atyid shrimps (Crustacea: Decapoda: Caridea) of Micronesia}, journal = {Diversity}, volume = {16}, year = {2024}, month = {03/2024}, pages = {1-31}, abstract = {Twelve species of atyid shrimps are reported from three Micronesian islands (Babeldaob, Pohnpei, and Guam) and studied using a combined morphological and molecular approach. Among them, three are new records for the area (Caridina appendiculata, Caridina lobocensis, and Caridina rubella), while three new species are here described: Atyoida chacei sp. nov., Caridina ponapensis sp. nov., and Caridina rintelenorum sp. nov. Descriptions for these new species, diagnoses for poorly known species, and taxonomic notes are provided herein and their biogeography is discussed.}, keywords = {16S, amphidromy, Atyidae, DNA, island, morphology}, doi = {10.3390/d16040200}, url = {https://www.mdpi.com/1424-2818/16/4/200}, author = {de Mazancourt, Valentin and Marquet, G{\'e}rard and Keith, Philippe} } @article {9640, title = {Accounting for variability in life-history traits for the definition of amphidromous goby fry fisheries closure periods}, journal = {Cybium}, volume = {47}, year = {2023}, month = {10/2023}, pages = {391-399}, abstract = {Amphidromous goby fry (post-larvae and young juveniles) are traditionally fished when they arrive in rivers after their larval development at sea. In Reunion Island (Indian Ocean) two species of amphidromous goby are mainly targeted by the fisheries: the endemic\ Cotylopus acutipinnis\ and the cosmopolitan\ Sicyopterus lagocephalus. Despite the lack of quantitative data on these fisheries, their impact on populations\ is expected to be important because the catches can represent several tonnes per year. Consequently, fishery regulation changes have been proposed that increase the duration of the existing fisheries closure period of two weeks in March. We developed an approach to identify key periods for fisheries closure, including assessment of the proposed management scenario and several alternative protection scenarios, based on the maximization of fry abundance and on the variability of four life-history traits: (i) fry size and (ii) age at arrival in rivers, (iii) the time the juveniles spend in river before maturation and (iv) their migration behaviour. This approach is in seeking to preserve a high level of phenotypic diversity, which is predicted to promote population resilience. We conducted a multiple-criteria decision analysis to rank 4096 alternatives of fisheries closure periods, ranging from zero to 12 months, based on their propensity to maintain fry abundance and life history trait diversity. Finally, according to the type of fisheries closure period (discontinuous or continuous) and the proportion of annual abundance and variability of life-history traits preserved during the period (50\% or 75\%), we propose four different fisheries closures lasting from six to nine months.}, keywords = {amphidromy, Bichiques, Conservation, diadromy, Indian Ocean, Management, recruitment}, doi = {10.26028/cybium/2023-018}, url = {https://sfi-cybium.fr/fr/accounting-variability-life-history-traits-definition-amphidromous-goby-fry-fisheries-closure}, author = {Lagarde, Rapha{\"e}l and Valade, Pierre and Teichert, Nils} } @article {7825, title = {Water temperature influences larval survival of the amphidromous goby Sicyopterus lagocephalus}, journal = {Ecology of Freshwater Fish}, year = {2021}, month = {May-02-2022}, abstract = {Water warming induced by human activities can impact fish larvae survival, notably because it influences larval development and prey abundances. Amphidromous gobies of the subfamily Sicydiinae are particularly sensitive to this threat as the newly hatched free embryos are poorly developed and the first feeding opportunity only occurs after they reach the ocean. Here, we studied how water temperature (21, 23, 25, 29 and 31{\textdegree}C) impacts early development stages of Sicyopterus lagocephalus in both freshwater and marine aquaria (salinity 35). We monitored survival time, larval condition and the occurrence of critical developmental events such as mouth opening, yolk sac and oil globule resorption. In freshwater, the survival exceeded 150 hours at 21{\textdegree}C, while it dropped below 50 hours at 31{\textdegree}C. In seawater, the larval development of unfed larvae was significantly affected by temperature, survival time being greatly reduced in warmer waters. Accounting for the observed duration between mouth opening and the resorption of the oil globule, we estimated that larvae need to find suitable prey in seawater within a short time: around 30 hours during the peak of reproduction in summer. Otherwise, their endogenous reserves become depleted and their condition degrades. This study emphasises the sensitivity of free embryos to stream flow alterations, which contributes to the increase in water temperature and to the slowing down of larvae drift to the ocean. We conclude that once in seawater the temperature and feeding conditions experienced by amphidromous larvae are critical for survival.}, keywords = {amphidromy, Early life history, larval survival, mixed feeding period, starvation, water warming}, issn = {0906-6691}, doi = {10.1111/eff.12602}, url = {https://onlinelibrary.wiley.com/doi/10.1111/eff.12602}, author = {Teichert, Nils and Lagarde, Rapha{\"e}l and Occelli, Nicolas and Ponton, Dominique and Gaudin, Philippe} } @article {5930, title = {The complex study of complexes: The first well-supported phylogeny of two species complexes within genus Caridina (Decapoda: Caridea: Atyidae) sheds light on evolution, biogeography, and habitat}, journal = {Molecular Phylogenetics and Evolution}, volume = {131}, year = {2019}, pages = {164-180}, abstract = {

Atyid shrimps, a key component of tropical freshwater ecosystems, face multiple anthropogenic threats and thus

need special attention. With more than 300 described species, the genus Caridina is the most speciose of all the

Caridea infra-order. Caridina spp. occupy diverse habitats in tropical freshwaters of the Indo-West Pacific region.

Several species complexes have been recognized, based on common morphological features, but little is known

about how well these morphological characteristics align with phylogenetic characteristics. Furthermore, no

phylogeny of the genus Caridina published so far has provided well-resolved and supported relationships among

different species, thus impeding the possibility of proposing evolutionary hypotheses. In this study we used next

generation sequencing (NGS) to provide new insights into the phylogenetic relationships among the genus

Caridina, focusing on two complexes: {\textquoteleft}Caridina nilotica{\textquoteright} and {\textquoteleft}Caridina weberi{\textquoteright}. We collected 92 specimens belonging

to these two groups from most of their known geographical range, representing 50 species, for which we

sequenced seven mitochondrial genes and two nuclear markers using ion torrent NGS. We performed a phylogenetic

analysis, which yielded the first well-supported tree for the genus Caridina. On this tree were mapped the

geographic ranges and the habitats used by the different species, and a time calibration was tested. We found the

driving factors that most likely account for separation of clades are differences in habitat and to a lesser extent

geography. This work provides new insights into the taxonomy of this group and identifies opportunities for

further studies in order to fill knowledge gaps that currently impede the management and conservation of atyid

species.

1. Introduction

}, keywords = {amphidromy, freshwater shrimp, Indo-Pacific, Mitochondrial genome, Molecular systematics, taxonomy}, author = {de Mazancourt, Valentin and Klotz, Werner and Marquet, G{\'e}rard and Mos, B and Rogers, C and Philippe Keith} } @article {6047, title = {The global geography of fish diadromy modes}, journal = {Global Ecology and Biogeography}, year = {2019}, abstract = {

Aim: Geographical gradients in resource production are likely to translate into macroecological patterns in the biodiversity of migratory organisms, but few studies have addressed this question at a global scale. Here, we tested a hypothesis based on uncoupled latitudinal gradients in marine and freshwater primary productivities aimed at explaining where (e.g., at which latitude) and at which stage of the life cycle (larvae, amphidromy; juvenile, catadromy; or adult, anadromy) migration from ocean to freshwater occurs (diadromy).

Location: Global.

Time period: Current.

Major taxa studied: Fishes.

Methods: We modelled, using multinomial regressions, the proportion of catadromous, anadromous and amphidromous species in 994 river basins as a function of freshwater and marine net primary productivities (NPP; in milligrams of carbon per square metre per day) and additional biotic and abiotic variables. Using data extracted from the Global Biodiversity Information Facility (GBIF) database, we tested whether diadromous, catadromous and amphidromous species differed with respect to the NPP of their marine and freshwater occurrences.

Results: Among diadromous species, anadromous species are present in higher proportions when conditions for growth are more favourable in the sea (higher productivity, higher temperature and lower number of competitors) than in freshwaters. The model reconstructs the latitudinal pattern observed in the proportion of anadromous species, including an asymmetry between the Northern and Southern Hemispheres. According to GBIF occurrences, the ratio of marine over freshwater productivity is higher for anadromous species compared with catadromous and amphidromous species.

Main conclusions: Our results support the hypothesis stating that migration between ocean and freshwater occurs by choosing the biome that optimizes pre-reproductive growth and is one more example of the importance of primary productivity in shaping large-scale community patterns. This result suggests that some diadromous fish populations and species may suffer from anticipated climate change if interbiome productivity gradients are affected.

}, keywords = {amphidromy, anadromy, Biogeography, catadromy, dispersal, GBIF database, Last Glacial Maximum, latitudinal gradient, Migration, Species richness}, doi = {DOI: 10.1111/geb.12931}, author = {Chalant, Ana{\"\i}s and J{\'e}z{\'e}quel, C{\'e}line and Philippe Keith and Bernard Hugueny} } @article {3846, title = {Larval traits of the Caribbean amphidromous goby Sicydium punctatum (Gobioidei: Sicydiinae) in Guadeloupe}, journal = {ECOLOGY OF FRESHWATER FISH}, volume = {25}, year = {2016}, pages = {272-280}, keywords = {amphidromy, larval dispersal, Lesser Antilles, otolith, Sicydiinae}, author = {L{\'e}a Lejeune and H{\'e}l{\`e}ne Tabouret and Taillebois, Laura and Monti, Dominique and Philippe Keith} } @article {3727, title = {Morphological changes during the transition from freshwater to sea water in an amphidromous goby, Sicyopterus lagocephalus (Pallas 1770) (Teleostei).}, journal = {Ecology of Freshwater fish}, volume = {25}, year = {2016}, pages = {48-59}, abstract = {

The widely distributed amphidromous goby Sicyopterus lagocephalus needs drastic change of habitat to
fulfil its life cycle: adults live and spawn in rivers, where eggs hatch into prolarvae that have to reach the sea to
acquire characteristics of planktonic larvae. Postlarvae return to rivers where they recruit and grow to the adult
reproductive stage. Here, we describe the prolarval stages, namely from hatching to first contact with sea water, as
well as the first marine larval stages. The observations were made under experimental conditions. We described 3
prolarval substages in freshwater (L1a{\textendash}L1c). Prolarvae present a slight but visible ontogenetic development in
freshwater, during which the yolk sac begins to reduce, the pigmentation increases on the body and in the eyes, and
the lenses appear, although the eyes are not functional. Prolarvae need to reach the sea in a maximum of 96 h to
pursue their development. Their transfer in sea water at a salinity of 36.5 induces important morphological
modifications (i.e. yolk sac full absorption, appearance of pectoral fins, migration of the eyes in anterolateral
position of the head, opening of mouth and anus), enabling the organisms to adapt to their new environment. This
marine stage is divided into two substages: L2a corresponding to the organisation of the morphological structures
adapted to the marine environment and L2b during which these morphological structures become functional.
Whether it is in freshwater or sea water, the duration of the substages depends on the water temperature, but is
similar for all individuals for a given temperature.

}, keywords = {amphidromy, larval development, larval morphology, Reunion Island, Sicyopterus lagocephalus}, author = {Ellien, C{\'e}line and Werner, Ugo and Philippe Keith} } @article {4021, title = {Inputs from Microchemistry to the understanding of three Sicydiinae species{\textquoteright} life cycle. }, journal = {Life and environment}, volume = {65}, year = {2015}, pages = {73-84}, keywords = {amphidromy, LIFE HISTORY, MICROCHEMISTRY, Sicydiinae}, author = {Taillebois, Laura and H{\'e}l{\`e}ne Tabouret and P{\'e}cheyran, C and Philippe Keith} } @article {4100, title = {Inputs from Microchemistry to the understanding of three Sicydiinae species{\textquoteright} life cycle. }, journal = { Life and environment.}, volume = {65}, year = {2015}, pages = {73-84}, keywords = {amphidromy, LIFE HISTORY, MICROCHEMISTRY, Sicydiinae}, author = {Taillebois, Laura and H{\'e}l{\`e}ne Tabouret and P{\'e}cheyran, C and Philippe Keith} } @article {4098, title = {Population structure of the Asian amphidromous Sicydiinae goby, Stiphodon percnopterygionus with comments on larval dispersal in the northwest Pacific Ocean. }, journal = {Life and Environment}, volume = {65}, year = {2015}, pages = {63-71}, keywords = {amphidromy, larval dispersal, POPULATION STRUCTURE, Sicydiinae, Stiphodon}, author = {Clara Lord and Maeda, Ken and Philippe Keith and Watanabe, S} } @article {4019, title = {Population structure of the Asian amphidromous Sicydiinae goby, Stiphodon percnopterygionus with comments on larval dispersal in the northwest Pacific Ocean.}, journal = {Life and Environment,}, volume = { 65}, year = {2015}, pages = {63-71}, keywords = {amphidromy, Larval dispersa, Population structure., Sicydiinae, Stiphodon}, author = {Clara Lord and Maeda, Ken and Philippe Keith and Watanabe, S} }