A single generation in the wild increases fitness for descendants of hatchery-origin Chinook salmon (Oncorhynchus tshawytscha).

ABSTRACT: Reintroduction is an important tool for the recovery of imperiled species. For threatened Pacific salmonids (Oncorhynchus spp.) species, hatchery-origin (HOR) individuals from a nearby source are often used to reestablish populations in vacant, historically occupied habitat. However, this approach is challenged by the relatively low reproductive success that HOR Pacific salmonids experience when they spawn in the wild, relative to their natural-origin (NOR) counterparts. In this study, we used genetic parentage analysis to compare the reproductive success of three groups of adult Chinook salmon (Oncorhynchus tshawytscha) reintroduced above Cougar Dam on the South Fork McKenzie River, Oregon: HOR Chinook salmon from an integrated stock; first-generation, wild-born descendants

SUBMITTER: Dayan DI 

PROVIDER: S-EPMC11009425 | biostudies-literature | 2024 Apr

REPOSITORIES: biostudies-literature