Natural recolonization of the Seine River by Atlantic salmon (Salmo salar) of multiple origins

[Departement_IRSTEA]Eaux [TR1_IRSTEA]QUASARE The restoration of previously extinct salmon populations is usually achieved with stocking programmes, but natural recolonization can also occur through the straying of individuals from nearby populations. Here we investigated the origin of Atlantic salmo...

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Bibliographic Details
Published in:Canadian Journal of Fisheries and Aquatic Sciences
Main Authors: Perrier, C., Evanno, G., Belliard, Jérôme, Guyomard, R., Baglinière, Jean-Luc
Other Authors: Écologie et santé des écosystèmes (ESE), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, Hydrosystèmes et Bioprocédés (UR HBAN), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Génétique Animale et Biologie Intégrative (GABI), Institut National de la Recherche Agronomique (INRA)-AgroParisTech
Format: Article in Journal/Newspaper
Language:English
Published: HAL CCSD 2010
Subjects:
RESTAURATION DE POPULATION
RECOLONISATION
AMELIORATION DE LA QUALITE DE L'EAU
GENOTYPE
SEINE
[SDE]Environmental Sciences
Atlantic salmon
Salmo salar
Online Access:https://hal.science/hal-00584140
https://hal.science/hal-00584140/document
https://hal.science/hal-00584140/file/AN2010-PUB00027286.pdf
https://doi.org/10.1139/F09-190
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Summary:[Departement_IRSTEA]Eaux [TR1_IRSTEA]QUASARE The restoration of previously extinct salmon populations is usually achieved with stocking programmes, but natural recolonization can also occur through the straying of individuals from nearby populations. Here we investigated the origin of Atlantic salmon (Salmo salar) that recently recolonized the Seine River (France). The degradation of this river had led to the extinction of the population, but since the 1990s, the water quality has greatly improved. Although no stocking was performed, 162 individual salmon were recently observed by video-counting. Seven fish were sampled for morphological and genetic analyses. These individuals were genotyped at 17 microsatellites markers and their probable source populations were identified using baseline samples from regional and distant populations. Four of the sampled individuals were grilse and three were multi-sea-winter fish. Genetic analyses revealed that the fish partly originated from a nearby stock but also from distant populations, suggesting long-distance straying. This natural recolonization of a large river by strayers from several origins is discussed in terms of population sustainability and management. / La restauration de populations antérieurement éradiquées de saumons se fait ordinairement par des programmes d'empoissonnement, mais il peut aussi exister une recolonisation naturelle par les individus errants des populations avoisinantes. Nous examinons ici l'origine des saumons atlantiques (Salmo salar) qui ont récemment recolonisé la Seine(France). La dégradation du fleuve avait entraıné l'extinction de la population, mais depuis les années 1990, la qualité de l'eau s'est grandement améliorée. Bien qu'aucun empoissonnement n'ait été effectué, 162 saumons individuels ont récemment été observés par comptage vidéo. Sept poissons ont été prélevés pour des analyses morphologiques et génétiques.Nous avons déterminé leur génotype à 17 marqueurs microsatellites et identifié leur population d'origine probable au ...

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