Current status of the brown trout (Salmo trutta) populations within eastern Pyrenees genetic refuges

摘要: Since the end of 20th century, some headwaters rivers in eastern Pyrenees have been designated as genetic refuges to protect remaining native brown trout (Salmo trutta) diversity. The declaration was based on limited or no evidence impact from released non-native Atlantic hatchery fish. Hatchery releases were completely banned into refuges, but pre-existing fishing activities maintained. Specific locations each refuge monitored every 2–3 generations update information accurately assess contribution these reservoirs preservation gene pools. This work updates year 2014 three (in Ter, Freser and Flamisell rivers). Previous studies identified introgressed populations within suggested discrepancies between underlying intention pools detected. Therefore, we also examined divergences among inside river segments. Combined at five microsatellite lactate dehydrogenase C (LDH-C*) loci showed reduced significant temporal allele frequency fluctuations above specific that did not modify overall levels local diversity divergences. Bayesian clustering analyses confirmed presence differentiated units refuge. Some River area high fish (over 20%). We discuss additional actions (releases fish, selective removals fishery reinforcement with sterile individuals) improve conservation objective