Hatcheries - Hatchery Reports
Date Published: March 17, 2003
Number of Pages: 40
Author(s): Stan Hammer
This report is published annually by the Washington Department of Fish and Wildlife (WDFW) Fish Program/ Hatcheries Division. It is generated directly from the WDFW Adult Report Database. This database contains daily records of adult fish handling activities as reported by hatchery facilities on the Adult Record Form. It describes the total escapement or return of species of salmon and trout to WDFW facilities and cooperative projects within Washington State. It also enumerates the total number of fish returning to hatchery racks or traps in the rivers and streams of Washington State for the spawning activity cycle beginning in approximately March 2001 and ending in approximately March 2002. This report does not include the captive brood programs, which will be released in a separate report.
We define escapement as the return of spawning fish to hatchery racks or traps. The data for this report are developed by WDFW hatchery staff who enumerate the runs of fish returning to their respective streams; these numbers are recorded on adult records which are sent to Olympia for compilation and analysis. These records provide information on run timing; information on the results of selective fisheries, and critical data for coded wire tag (CWT) analysis.
CWTs are a management tool used to determine the status of runs and the effect of various management strategies and research projects. (CWT recovery totals are available at www.rmis.org). This report represents the collective work of many people, and as such, captures the definitive data for that spawning cycle. Thus, it provides a summary of salmonids returning to WDFW facilities throughout the state of Washington and the eggs that were spawned in association with those returning fish. The 2001-2002 return year produced 1,149,079 anadromous and 129,971 resident adult fish returning to hatchery racks and traps for a total adult escapement of 1,279,050. These returning adults produced an anadromous eggtake of 222,026,363 and a resident eggtake of 17,796,195 for a total eggtake of 239,822,558.
This annual hatchery escapement report is organized and divided into three geographical regions: Puget Sound (including the Straits of Juan de Fuca), Coast, and Columbia River. It is further divided by species and race. For example: chinook salmon are described in three geographic regions, Puget Sound (including the Straits of Juan de Fuca), Coastal, and Columbia River, as well as by their spring, summer and fall races.