Addendum to FMS 16-03 PDF Download

Author: Kyle Shedd
Publisher:
ISBN:
Category : Fish populations
Languages : en
Pages : 25

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Book Description
Accurate, precise estimates of stock-specific harvests of sockeye salmon (Oncorhynchus nerka) are lacking for commercial fisheries in the Kodiak Management Area (KMA). Such information would be useful for reconstructing runs, building accurate brood tables to define escapement goals, and refining management by identifying spatial and temporal harvest patterns of local and nonlocal stocks. Hence, the Alaska Department of Fish and Game developed a genetic baseline for mixed stock analysis (MSA) to estimate the stock compositions of sockeye salmon harvests in select KMA commercial salmon fisheries from 2014 to 2016. This report describes additional baseline testing done to verify the accuracy and precision of MSA performance for Frazer and Ayakulik reporting groups given their shared ancestry and close genetic relationships. Specifically, these additional fishery scenario tests better reflect the temporal nature of KMA commercial harvest by testing MSA performance with different relative proportions of early- and late-run Ayakulik and Karluk fish. These additional fishery scenario tests indicate consistent, directional biases in the misallocation of fish between Frazer and Ayakulik. The baseline is unable to provide accurate and precise estimates of stock composition for Frazer and Ayakulik reporting groups separately, but is able to when they are combined. Thus, these 2 stocks will be combined into a composite Frazer/Ayakulik reporting group for future reporting of 2014-2016 KMA commercial harvest mixtures.