Survival and migration behavior of juvenile coho salmon in the Klamath River relative to discharge at Iron Gate Dam, Northern California, 2007

Abstract

Contents-Continued implement the paired-release design, because (1) an important assumption was violated in 2007, (2) the design reduces sample sizes in the IGH-to-Shasta River reach by 50 percent, and (3) the tagging and handling mortality was negligible when the design was used in 2006. We will tag and release fish from a tank at IGH as well as hatchery fish captured in traps near the I-5 Bridge. The purpose of this added activity will be to see if the use of migrant hatchery fish will result in migration behavior more similar to the behavior of wild fish in 2006. An additional group of wild fish would improve this design, but wild fish probably will not be available in sufficient numbers for our use in 2008.