HAL will be down for maintenance from Friday, June 10 at 4pm through Monday, June 13 at 9am. More information
Skip to Main content Skip to Navigation
Journal articles

Coupling genetic and otolith trace element analyses to identify river-born fish with hatchery pedigrees in stocked Atlantic salmon (Salmo salar) populations

Abstract : This study combines otolith trace element and genetic analyses to explore the origin of individuals when hatcheryreared fish are released into wild populations. We sampled 90 juvenile Atlantic salmon (Salmo salar) in four rivers in Normandy (France) and in the hatchery stock. Individuals were analyzed at six microsatellite markers and their otolith elemental concentrations (14 elements) were measured using femto-second laser ablation inductively-coupled plasma mass spectrometry. Wild populations were genetically differentiated from the hatchery strain (FST ≈ 0.06). Significant differences in elemental concentrations were found among otoliths of juveniles from the four rivers and the hatchery, allowing the identification of their geographic origin (83%100% correct assignment). Coupling genetic and trace element analyses on the same individuals provided formal evidence that hatchery-born juveniles released into the wild can migrate to the sea and return as adults to breed on natural spawning grounds. Their progeny have pure hatchery pedigrees but have otoliths typical of riverborn juveniles, meaning that they can be mistaken for hatchery-raised juveniles if only genetic data are considered. The presence of hybrids also confirmed that individuals with hatchery pedigrees can breed with wild conspecifics.
Mots-clés : NORMANDIE
Document type :
Journal articles
Complete list of metadata

https://hal.inrae.fr/hal-02596094
Contributor : Migration Irstea Publications Connect in order to contact the contributor
Submitted on : Friday, May 15, 2020 - 8:43:31 PM
Last modification on : Saturday, February 5, 2022 - 11:26:01 AM

Identifiers

  • HAL Id : hal-02596094, version 1
  • IRSTEA : PUB00033768

Collections

Citation

C. Perrier, Françoise Daverat, Guillaume Evanno, Christophe Pécheyran, Jean-Luc Baglinière, et al.. Coupling genetic and otolith trace element analyses to identify river-born fish with hatchery pedigrees in stocked Atlantic salmon (Salmo salar) populations. Canadian Journal of Fisheries and Aquatic Sciences, NRC Research Press, 2011, 68 (6), pp.977-987. ⟨hal-02596094⟩

Share

Metrics

Record views

5