A5090787049- Fish Ecology and Management Studies
- Genetic diversity and population structure
- Genetic and phenotypic traits in livestock
- Animal Behavior and Reproduction
- Wildlife Ecology and Conservation
- Marine and fisheries research
- Aquatic Invertebrate Ecology and Behavior
- Fish Biology and Ecology Studies
- Physiological and biochemical adaptations
- Reproductive biology and impacts on aquatic species
- Amphibian and Reptile Biology
- Identification and Quantification in Food
- Mollusks and Parasites Studies
- Avian ecology and behavior
- Plant and animal studies
- Aquaculture Nutrition and Growth
- Mediterranean and Iberian flora and fauna
- Genomics and Phylogenetic Studies
- Genetic Mapping and Diversity in Plants and Animals
- Environmental DNA in Biodiversity Studies
- Animal Ecology and Behavior Studies
- Botany and Plant Ecology Studies
- Essential Oils and Antimicrobial Activity
- Forensic and Genetic Research
- Agricultural Systems and Practices
Institut National de Recherche pour l'Agriculture, l'Alimentation et l'Environnement
2009-2025
Ifremer
2021-2025
L'Institut Agro
2021-2025
Association pour l'Utilisation du Rein Artificiel dans la région Lyonnaise
2022-2024
Centre Bretagne-Normandie
2022
Groupe de Recherche en Écologie Arctique
2022
Institut Agro Rennes-Angers
2011-2021
Ecology and Ecosystem Health
2012-2021
University of Lausanne
2005-2012
Institut National de la Recherche Agronomique
2010-2012
Abstract The identification of genetically homogeneous groups individuals is a long standing issue in population genetics. A recent Bayesian algorithm implemented the software structure allows such groups. However, ability this to detect true number clusters ( K ) sample when patterns dispersal among populations are not has been tested. goal study carry out tests, using various scenarios from data generated with an individual‐based model. We found that most cases estimated ‘log probability...
1 Sex differences in levels of parasite infection are a common rule wide range mammals, with males usually more susceptible than females. Sex-specific exposure to parasites, e.g. mediated through distinct modes social aggregation between and within genders, as well negative relationships androgen immune defences thought play major role this pattern. 2 Reproductive female bats live close association clusters at maternity roosts, whereas nonbreeding females generally occupy solitary roosts....
Understanding the evolutionary mechanisms generating parallel genomic divergence patterns among replicate ecotype pairs remains an important challenge in speciation research. We investigated between anadromous parasitic river lamprey (Lampetra fluviatilis) and freshwater-resident nonparasitic brook planeri) nine population displaying variable levels of geographic connectivity. genotyped 338 individuals with RAD sequencing inferred demographic history each pair using a diffusion approximation...
Males that are successful in intra-sexual competition often assumed to be of superior quality. In the mating system most salmonid species, intensive dominance fights common and winners monopolise mates sire offspring. We drew a random sample mature male brown trout (Salmo trutta) from two wild populations determined their hierarchy or traits linked dominance. The fish were then stripped sperm was used for vitro fertilisations full-factorial breeding designs. recorded embryo viability until...
Disentangling the effects of natural environmental features and anthropogenic factors on genetic structure endangered populations is an important challenge for conservation biology. Here, we investigated combined influences major stocking with non-native fish local adaptation Atlantic salmon (Salmo salar) populations. We used 17 microsatellite loci to genotype 975 individuals originating from 34 French rivers. Bayesian analyses revealed a hierarchical into five geographically distinct...
While the stocking of captive-bred fish has been occurring for decades and had substantial immediate genetic evolutionary impacts on wild populations, its long-term consequences have only weakly investigated. Here, we conducted a spatiotemporal analysis 1428 Atlantic salmon sampled from 1965 to 2006 in 25 populations throughout France investigate influence neutral structure (Salmo salar) populations. On basis 11 microsatellite loci, found that overall among dramatically decreased over period...
Island ecosystems, particularly vulnerable to environmental challenges, host many endangered native species. Diadromous fish, in particular, are threatened throughout their marine and freshwater habitats. The conservation of these species requires an in-depth understanding genetic diversity structure, better understand adaptive potential. We investigated fine-scale population structure brook charr (Salvelinus fontinalis) by genotyping 10 microsatellite loci 244 individuals at three spatial...
Il y a trois espèces de lamproie en France : la marine (Petromyzon marinus), rivière (Lampetra fluviatilis) et Planer (L.planeri). La est classée danger vulnérable, selon les critères l’Union internationale pour conservation nature (UICN), sur liste rouge des poissons France. répartition reste mal connue France, ce projet visait initialement à développer une approche détection partir d’ADN environnemental (ADNe). Une première étape été le développement marqueurs moléculaires permettant...
Les aloses et les lamproies anadromes sont menacées dans une grande partie de leur aire réparti-tion. Ce travail vise à déterminer tendances des populations en France identifier pressions plus probables. Des séries temporelles provenant différentes sources (vidéo-comptage, pêche professionnelle amateur, nids, bulls fronts migration) ont été collectées regroupées selon la similarité leurs tendances. Ces groupes révèlent un déclin important au cours dernières an-nées tant pour que lamproies....
Abstract We examined the spatial and temporal variation of species diversity genetic in a metacommunity comprising 16 freshwater gastropods. monitored abundance at five localities Ain river floodplain southeastern France, over period four years. Using 190 AFLP loci, we Radix balthica , one most abundant gastropod metacommunity, twice during that period. An exceptionally intense drought occurred last two years differentially affected study sites. This allowed us to test effect natural...
‘Good-genes’ models of sexual selection predict significant additive genetic variation for fitness-correlated traits within populations to be revealed by phenotypic traits. To test this prediction, we sampled brown trout ( Salmo trutta ) from their natural spawning place, analysed carotenoid-based red and melanin-based dark skin colours tested whether these can used offspring viability. We produced half-sib families in vitro fertilization, reared the resulting embryos under standardized...
Abstract Mating with attractive or dominant males is often predicted to offer indirect genetic benefits females, but it still largely unclear how important such non‐random mating can be regard embryo viability. We sampled a natural population of adult migratory brown trout ( Salmo trutta ), bred them in vitro half‐sib breeding design separate from maternal environmental effects, raised 2098 embryos singly until hatching, and exposed experimentally different levels pathogen stress at late...
Abstract In some fishes, water chemistry or temperature affects sex determination creates sex‐specific selection pressures. The resulting population ratios are hard to predict from laboratory studies if the environmental triggers interact with other factors, whereas in field studies, singular observations of unusual may be particularly prone selective reporting. Long‐term monitoring largely avoids these problems. We studied a grayling (Thymallus thymallus) Lake Thun, Switzerland, that has...
The restoration of previously extinct salmon populations is usually achieved with stocking programmes, but natural recolonization can also occur through the straying individuals from nearby populations. Here we investigated origin Atlantic ( Salmo salar ) that recently recolonized Seine River (France). degradation this river had led to extinction population, since 1990s, water quality has greatly improved. Although no was performed, 162 individual were observed by video-counting. Seven fish...
Ecologically based divergent selection is a factor that could drive reproductive isolation even in the presence of gene flow. Population pairs arrayed along continuum divergence provide good opportunity to address this issue. Here, we used combination mating trials, experimental crosses and population genetic analyses investigate evolution between two closely related species lampreys with distinct life histories. We microsatellite markers genotype over 1000 individuals migratory parasitic...
Cytidine deaminases of the AID/APOBEC family catalyze C-to-U nucleotide transitions in mRNA or DNA. Members APOBEC3 branch are involved antiviral defense, whereas AID contributes to diversification antibody repertoires jawed vertebrates via somatic hypermutation, gene conversion, and class switch recombination. In extant jawless vertebrate, lamprey, two members implicated generation diversity variable lymphocyte receptors (VLRs). Expression studies linked CDA1 CDA2 genes assembly VLRA/C...
Abstract Sperm competition has been studied in many gonochoric animals but little is known about its occurrence simultaneous hermaphrodites, especially land snails. The reproductive behaviour of the snail Helix aspersa involves several features, like multiple mating, long‐term sperm storage and dart‐shooting behaviour, which may promote competition. Cryptic female choice also occur through a spermatheca subdivided into tubules, potentially allows compartmentalized successive mates. In order...
Inferring the history of isolation and gene flow during species divergence is a central question in evolutionary biology. The European river lamprey ( Lampetra fluviatilis ) brook (L. planeri) show low reproductive but have highly distinct life histories, former being parasitic-anadromous latter non-parasitic freshwater resident. Here we used microsatellite data from six replicated population pairs to reconstruct their using an approximate Bayesian computation framework combined with random...
The antibodies of jawless vertebrates consist leucine-rich repeat arrays encoded by somatically assembled VLRB genes. It is unknown how the incomplete germline loci are converted into functional antibody genes during B lymphocyte development in lampreys. In Lampetra planeri larvae lacking cytidine deaminase CDA2 gene, assembly fails, whereas T lineage-associated VLRA and VLRC antigen receptor gene assemblies occur normally. Thus, acts a cell lineage-specific fashion to support somatic...
Genetic admixture between wild and introduced populations is a rising concern for the management of endangered species. Here, we use dual approach based on molecular analyses samples collected before after hatchery fish introduction in combination with simulation study to obtain insight into mechanisms populations. Using 17 microsatellites, genotyped pre- post-stocking from four Atlantic salmon supplemented non-native estimate genetic admixture. We also used individual-based temporally...
While introductions and supplementations using non-native potentially domesticated individuals may have dramatic evolutionary effects on wild populations, few studies documented the evolution of genetic diversity life-history traits in supplemented populations. Here, we investigated year-to-year changes from 1989 to 2009 admixture at 15 microsatellite loci phenotypic an Atlantic salmon ( Salmo salar ) population stocked during first decade this period with two genetically phenotypically...
Abstract Aim Most animal species live in spatially and temporally heterogeneous landscapes where resources are unevenly distributed. Consequently, individuals must adapt their migratory behaviour to optimize feeding breeding opportunities. Here, we assess the role of life‐history (anadromy) seascape (a derivation concept landscape) heterogeneity on genetic connectivity coastal brown trout populations ( Salmo trutta L., 1758). Location English Channel. Methods A causal modelling approach,...