Details

Autor(en) / Beteiligte

• Beacham, Terry D.
• Candy, John R.
• Supernault, K. Janine
• Ming, Tobi
• Deagle, Bruce
• Schulze, Angela
• Tuck, Debra
• Kaukinen, Karia H.
• Irvine, James R.
• Miller, Kristina M.
• Withler, Ruth E.

Titel

Evaluation and Application of Microsatellite and Major Histocompatibility Complex Variation for Stock Identification of Coho Salmon in British Columbia

Ist Teil von

• Transactions of the American Fisheries Society (1900), 2001-11, Vol.130 (6), p.1116-1149

Ort / Verlag

Bethesda, MD: Taylor & Francis Group

Erscheinungsjahr

2001

Quelle

Wiley Online Library Journals Frontfile Complete

Beschreibungen/Notizen

• Variation at eight microsatellite loci and two linked exons of a major histocompatibility complex (MHC) locus was surveyed in approximately 21,000 coho salmon Oncorhynchus kisutch sampled from 138 localities ranging from southeast Alaska to the Columbia River, the majority of the sites being in British Columbia. The observed regional population structure enabled evaluation of the utility of using microsatellite and MHC variation for estimating the stock composition of coho salmon in mixed‐stock fisheries. Both MHC exons were more effective for stock identification than any of the eight microsatellite loci examined. The two MHC exons combined were nearly as effective, on average, as the eight microsatellite loci combined. Some loci were particularly effective at discriminating stocks from specific regions. Mixed‐stock analysis provided accurate estimates of contributions from the threatened Thompson River and upper Skeena River stocks, even when they composed less than 5% of the sampled fish. From about 17,000 coho salmon sampled from mixed‐stock fisheries in British Columbia and Washington during 1997–1999, we found that the highest estimated proportions of coho salmon originating in southeast Alaska were in Canadian fishing areas adjacent to the international border in northern British Columbia; the highest proportions of Washington‐origin coho salmon were observed closest to the international border in southern British Columbia. Within major river drainages, MHC variation within appropriately sampled fisheries can be used to determine the timing of spawning returns of specific stocks and the relative or absolute stock escapements.