Quantification of the Probable Effects of Alternative In-River Harvest Regulations on Recovery of Snake River Fall Chinook Salmon : Final Report March 1996.
Description: The goal of this study was to quantify the probable effects that alternative strategies for managing in-river harvest would have on recovery of Snake River fall chinook salmon. This report presents the analysis of existing data to quantify the way in which various in-river harvest strategies catch Snake River bright (SRB) fall chinook. Because there has been disagreement among experts regarding the magnitude of in-river harvest impacts on Snake River fall chinook, the authors compared the results from using the following three different methods to estimate in-river harvest rates: (1) use of run reconstruction through stock accounting of escapement and landings data to estimate harvest rate of SRB chinook in Zone 6 alone; (2) use of Coded Wire Tag (CWT) recoveries of fall chinook from Lyons Ferry Hatchery in a cohort analysis to estimate age and sex specific harvest rates for Zone 6 and for below Bonneville Dam; (3) comparison of harvest rates estimated for SRB chinook by the above methods to those estimated by the same methods for Upriver Bright (URB) fall chinook.
Date: March 1, 1996
Creator: Cramer, Steven P. & Vigg, Steven
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Partner: UNT Libraries Government Documents Department