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

Autor: Dayan DI; State Fisheries Genomics Lab, Coastal Oregon Marine Experiment Station, Department of Fisheries, Wildlife, and Conservation Sciences, Hatfield Marine Science Center Oregon State University Newport Oregon USA., Sard NM; Department of Biological Sciences State University of New York-Oswego Oswego New York USA., Johnson MA; Native Fish Conservation and Recovery, Oregon Department of Fish and Wildlife Salem Oregon USA., Fitzpatrick CK; State Fisheries Genomics Lab, Coastal Oregon Marine Experiment Station, Department of Fisheries, Wildlife, and Conservation Sciences, Hatfield Marine Science Center Oregon State University Newport Oregon USA., Couture R; Oregon Department of Fish and Wildlife Corvallis Oregon USA., O'Malley KG; State Fisheries Genomics Lab, Coastal Oregon Marine Experiment Station, Department of Fisheries, Wildlife, and Conservation Sciences, Hatfield Marine Science Center Oregon State University Newport Oregon USA.
Jazyk: angličtina
Zdroj: Evolutionary applications [Evol Appl] 2024 Apr 11; Vol. 17 (4), pp. e13678. Date of Electronic Publication: 2024 Apr 11 (Print Publication: 2024).
DOI: 10.1111/eva.13678
Abstrakt: 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 (hereafter F 1 s) of Chinook salmon produced at the same hatchery; and NOR Chinook salmon that are presumed to have been produced below the dam, on the mainstem McKenzie River, or elsewhere and volitionally entered a trap below Cougar Dam. We found that F 1 s produced nearly as many adult offspring as NORs, and 1.8-fold more adult offspring than HORs. This result suggests that, for the South Fork McKenzie reintroduction program, a single generation in the wild increases fitness for the descendants of HOR Chinook salmon. Although these results are encouraging, care must be taken before extrapolating our results to other systems.
Competing Interests: The authors declare no conflicts of interest.
(© 2024 The Authors. Evolutionary Applications published by John Wiley & Sons Ltd.)
Databáze: MEDLINE
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