Stamp Falls fishway counts, adipose clip/CWT recovery and biological sampling of chinook salmon escapements in Stamp River and Robertson Creek Hatchery, 1994 / by T.C. Nelson for Department of Fisheries...: Fs97-4/2324E-PDF

"In 1984, the Somass River system was selected under the Chinook Key Stream Program as one of the systems used to assess the response of chinook salmon stocks to a new harvest management regime. The goal of the new management regime is to rebuild chinook stocks to historical levels. The Chinook Key Stream Program was initiated in response to objectives set out in the Canada-U.S. Salmon Treaty. The major objectives of the Chinook Key Stream Program are: 1. to accurately estimate chinook escapement on key streams; 2. to estimate harvest rates and contributions to fisheries and escapement based on coded wire tagged/adipose-clip returns, including estimates of the total escapement of coded wire tags to the key stream system; and 3. to estimate the contribution of hatchery and natural production to the escapement. This report deals with the determination of spawning escapement of chinook salmon to the Stamp River in 1994 and related biological information. The objectives of the study were: 1. to estimate the total chinook salmon escapement to the Stamp River; 2. to determine the age and sex composition of both the in-river population and hatchery returns of chinook salmon to the system; and 3. to estimate the total escapement of coded wire tagged chinook salmon to the system, thereby assessing the hatchery contribution to the total escapement. …"--Introduction, page [1].

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