Progress Report on the Howard Hanson Project Adult Return Rate Study for CWT (Coded-Wire-Tagged) Coho and Chinook Salmon, 1994 and 1995

摘要

The purpose of this report is to provide an annual summary of the coded-wire-tagged (CWT) coho and Chinook salmon adult return portion of the Howard Hanson Project Adult Return Rate Study. Companion evaluations of the adult returns of fin-clipped steelhead and otolith-marked coho salmon are the responsibility of the Washington Department of Fish and Wildlife. The objective of this CWT study is to evaluate the salmon outplanting effort above the dam and provide baseline adult return rate data for pre- and post-project (pool raising) comparisons. The effect of the dam and the reservoir on survival of coho salmon from smolt to adult will also be evaluated. An effort will also be made to determine the effect of the dam and the reservoir on fall Chinook salmon.