2005 Coweeman River Juvenile Salmonid Production Evaluation PDF Format - [1.91 MB] Acknowledgements Jon Closson and Gerald Weinandt worked the trap during the 2005 field season. Their field work was exceptional, and allowed for project goals to be achieved. Pat Hulett, Chris Wagemann, and Chris Gleizes assisted with trap installation and operation. Dan Rawding, Pete Topping and Pat Hanratty provided valuable advice on trap operating protocols. Yuk Wing Cheng performed some of the KS tests for comparing sizes of maiden and recaptured fish. Anne Marshall, Craig Busack and Jim Scott of WDFW reviewed report drafts. Funding was provided by NOAAfisheries through the Mitchell Act and the Interagency Committee on Outdoor Recreation through the Hatchery Scientific Reform Group.

<<< Return to Wild Salmon Population Monitoring 2005 Coweeman River Juvenile Salmonid Production Evaluation By: Cameron Sharpe and Bryce Glaser December 2007 Executive Summary In 2005 Washington Department of Fish and Wildlife Conservation Biology Unit staff collaborated with Region 5 Fish Management staff to operate a rotary screw trap in the Coweeman watershed. The objectives of the work were to generate abundance estimates for juvenile salmonids emigrating from the Coweeman watershed including wild and hatchery winter-run steelhead, cutthroat, fall Chinook, and coho. Production estimates vary depending on the assumption made for the various analytical procedures but our best estimates for smolt and presmolt migrants past the trap between March 25 and August 8 2005 were approximately 20,000 wild winter-run steelhead, 1,500 wild cutthroat trout, 52,000 fall Chinook, and 17,000 wild coho. Approximately 16,000 hatchery winter-run steelhead trout out of approximately 19,000 planted successfully emigrated from the watershed.