Here's a new technical memorandum on genetic analysis of Chinook salmon taken as bycatch during Alaska's pollock trawl fisheries in 2011.
The following, taken directly from the report abstract, is what federal scientists determined for the Bering Sea and Aleutian Islands fishery.
Based on the analysis of 2,473 Chinook salmon bycatch samples collected throughout the 2011 BSAI walleye pollock (Theragra chalcogramma) trawl fishery, Coastal Western Alaska stocks dominated the sample set (68%) with smaller contributions from North Alaska Peninsula (9%), British Columbia (8%), and U.S. west coast (6%) stocks.
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