Author: Sara Ellen GilkPublisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 79
Book Description
The Southeast Alaska (SEAK) troll fishery harvests Chinook salmon originating from Alaska, British Columbia, and the Pacific Northwest. Owing to its mixed stock nature, the overall SEAK Chinook salmon fishery is managed as one of 3 such fisheries under provisions of the Pacific Salmon Treaty (PST) Agreement. The Alaska Department of Fish and Game has used genetic mixed stock analysis to estimate the stock composition of Chinook salmon harvested in the SEAK troll fishery since 2004 based on a genetic baseline developed by the Genetic Analysis of Pacific Salmonids group for use in PST fisheries. Genetic methods allow direct estimation of the major stock groups contributing to fisheries. This project estimated the relative stock composition of seasonal troll fishery harvests from fishery accounting years 2010 to 2014 (Oct. 1, 2009-Sept. 30, 2014). The major contributors to the Southeast Alaska troll fisheries on an annual basis are the Andrew Creek, Southern Southeast Alaska, British Columbia Coast/ Haida Gwaii, West Coast Vancouver Island, Interior Columbia River (Summer/Fall), North Oregon Coast, Washington Coast, and South Thompson reporting groups. Results indicate considerable temporal and spatial variation in the composition of troll harvests within years, but consistent patterns of composition across years. Stock composition data from this and other stock assessments are being used to provide fisheries information including stock-specific run reconstructions and forecasting of transboundary river run sizes, determining the origin of catches in the SEAK troll fishery by age to assist in evaluation of the Pacific Salmon Commission Chinook Model, and estimating some terminal run sizes of some stocks in the PST area that drive the SEAK fishery.