Dispersal capacities of anadromous Allis shad population inferred from a coupled genetic and otolith approach

• Published in: Canadian Journal of Fisheries and Aquatic Sciences
• Main Authors: Rougemont, Q., Drouineau, Hilaire, Launey, S., Jatteau, Philippe, Bareille, Gilles, Bérail, Sylvain, Pécheyran, Christophe, Feunteun, E., Roques, Séverine, Clavé, D., Nachón, D.J., Antunes, C., Mota, M., Réveillac, Elodie, Daverat, Françoise, Martin, J.
• Other Authors: Ecosystèmes aquatiques et changements globaux (UR EABX), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Institut des sciences analytiques et de physico-chimie pour l'environnement et les materiaux (IPREM), Université de Pau et des Pays de l'Adour (UPPA)-Institut de Chimie du CNRS (INC)-Centre National de la Recherche Scientifique (CNRS), Institut pluridisciplinaire de recherche sur l'environnement et les matériaux (IPREM), Université de Pau et des Pays de l'Adour (UPPA)-Centre National de la Recherche Scientifique (CNRS), Muséum national d'Histoire naturelle (MNHN), Institut d'Electronique du Solide et des Systèmes (InESS), Centre National de la Recherche Scientifique (CNRS), Institute for Biotechnology and Bioengineering (IBB), Technical University of Lisbon, Écologie et santé des écosystèmes (ESE), Institut National de la Recherche Agronomique (INRA)-AGROCAMPUS OUEST, LIttoral ENvironnement et Sociétés (LIENSs), La Rochelle Université (ULR)-Centre National de la Recherche Scientifique (CNRS)
• Format: Article in Journal/Newspaper
• Language: English
• Published: HAL CCSD 2015
• Subjects: early-life-history; salmon oncorhynchus-tshawytscha; alosa-alosa; american shad; atlantic salmon; diadromous fish; sockeye-salmon; natal origins; fresh-water; microsatellite dna; [SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry; Sockeye; Atlantic salmon
• Online Access: https://hal.science/hal-01557337; https://doi.org/10.1139/cjfas-2014-0510

[Departement_IRSTEA]Eaux [TR1_IRSTEA]QUASARE cited By 4 International audience Understanding dispersal capacities for migratory species is crucial for their management. By coupling otolith microchemistry and microsatellite genetic analyses, we provided information on snapshot and long-term dispersal capacity of Allis shad (Alosa alosa), an anadromous clupeid in decline throughout its distribution range. The allocation of natal origin was obtained from water chemistry and signatures in otoliths of juveniles and spawners within a Bayesian model. The majority of adults were assigned to a source river with high degrees of confidence; only 4% were undetermined. Otolith natal origins were used to define a population baseline by grouping individuals from the same natal river and not from the same sampling location as usually done. While A. alosa exhibited a high level of natal site fidelity, this species showed weak genetic structure, which supported the evidence of a substantial flow of strayers between river basins in the vicinity or at longer distances. However, long distance straying was probable but not frequent. In a context of global change, straying would be a key mechanism to drive dispersal and allow resilience of Allis shad populations.