The Klamath River September 2002 Fish Die-off : Older Fish from Trinity River Hatchery Affected ​

Report on Estimate of Mortality
Report Number AFWO-01-03

In September 2002, a devastating fish die-off occurred in the lower Klamath River, prompting an investigation by the U.S. ​ Fish and Wildlife Service (USFWS) and other agencies. ​ This article aims to provide an overview of the die-off and highlight the significant presence of older fish from the Trinity River Hatchery among the casualties. ​

Summary of Findings: The USFWS report on the estimate of mortality revealed that a total of 34,056 observable fish…