|材料类型：||文献, 政府刊物, 国际上的政府刊物, 州政府或者省政府刊物, 互联网资源|
|文件类型：||书, 计算机文档, 互联网资源|
|所有的著者/提供者：||Yukon River Joint Technical Committee. Salmon Size Subcommittee.; Alaska. Division of Commercial Fisheries.|
|描述：||ii, 34 pages : illustrations ; 28 cm.|
|详述：||This item was harvested from the Fish and Game web site: http://www.cf.adfg.state.ak.us/region3/pubs/yukon/06bofjtcchin.pdf in April 2007 for the Alaska State Publications Program; remote access available via StaticURL.|
|丛书名：||Regional informational report (Alaska. Division of Commercial Fisheries : 1999), no. 3A06-07.|
|责任：||prepared by the United States and Canada Yukon River Joint Technical Committee, Salmon Size Subcommittee.|
Concerns regarding the size and sex composition of Yukon River Chinook salmon, Oncorhynchus tshawytscha, have been expressed in public meetings for over a decade. However, reports of small size and low numbers of females have become increasingly common in recent years, and apprehension over the long-term health of the stock has grown within the drainage. In response to these reports, the Salmon Size Subcommittee of the US/Canada Yukon River Joint Technical Committee was formed and charged with advising the Committee, and thereby the US/Canada Yukon River Panel, with respect to changes in chinook salmon age, sex, and size composition. This report, which summarizes the findings of prior investigations and the scientific literature on factors that influence salmon morphology, represents the first product of the subcommittee.