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- Title
Large-scale parentage-based tagging and genetic stock identification applied in assessing mixed-stock fisheries and hatchery brood stocks for coho salmon in British Columbia, Canada.
- Authors
Beacham, Terry D.; Jonsen, Kim; McIntosh, Brenda; Sutherland, Ben J.G.; Willis, David; Lynch, Cheryl; Wallace, Colin
- Abstract
Direct DNA sequencing is powering a revolution in the application of genetics to resource management, with parentage-based tagging (PBT) increasingly applied to salmon fisheries and hatchery brood stock management and assessment. Genetic stock identification (GSI) and PBT were applied to assessment of 2018 coho salmon (Oncorhynchus kisutch) ocean fisheries and hatchery brood stocks in British Columbia (BC), Canada, with 6391 individuals successfully genotyped in fishery samples and 7805 individuals genotyped in 40 hatchery brood stocks. Population-specific contributions to mixed-stock fisheries and exploitation rates were estimated with coded-wire tags (CWTs) and GSI–PBT technologies for six populations. PBT assignments, verified by CWTs, were 100% accurate for 308 individuals with respect to population of origin and age. There was generally reasonably close agreement of estimated population-specific exploitation rates between CWT and genetic methods. We conclude that a genetic approach can improve upon the results available from the current CWT program for assessment and management of coho salmon fisheries and hatchery brood stocks in BC and provide information critical to aid in implementation of Canada's Policy for Conservation of Wild Pacific Salmon.
- Subjects
BRITISH Columbia; CANADA; COHO salmon; SHELLFISH fisheries; FISH stocking; FISHERIES; PACIFIC salmon; NUCLEOTIDE sequence; FISHERY management
- Publication
Canadian Journal of Fisheries & Aquatic Sciences, 2020, Vol 77, Issue 9, p1505
- ISSN
0706-652X
- Publication type
Article
- DOI
10.1139/cjfas-2020-0035