Stock composition of subsistence harvests and total return of sockeye salmon from the Kvichak River

This project will reconstruct the total return of sockeye salmon to the Kvichak River to identify: 1) which of four stocks are most utilized by subsistence fisheries; 2) when these stocks migrate through the commercial fishery and escapement monitoring tower; and 3) if there are temporal trends in migration that may allow commercial fisheries managers to protect stocks important to subsistence fisheries. In addition, by building upon existing smolt stock composition data, this project will evaluate survival and productivity of brood years 2012–2015 at smolt and returning adult life stages.

本项目将重构克维查克河（Kvichak River）红大马哈鱼（sockeye salmon）的总洄游种群规模，以达成以下研究目标：1）明确四种种群（stock）中哪些被自给性渔业的利用程度最高；2）探明这些种群洄游经过商业渔业作业区和亲鱼洄游逃逸监测塔的具体时段；3）分析洄游过程是否存在时间趋势，以便商业渔业管理者能够针对性保护对自给性渔业至关重要的种群。此外，本项目将基于现有幼鲑（smolt）种群组成数据，评估2012-2015年亲鱼世代在幼鲑阶段与洄游成体阶段的存活率与种群生产力。