Radio-Tracking Studies on Adult Chinook Salmon and Steelhead Trout at Lower Columbia River Hydroelectric Dams, 1971-77

摘要

The introduction of radio tags for fisheries research on the Columbia River in 1971 by the National Marine Fisheries Service (NMFS), Seattle, Washington, opened up a specialized technique for investigating the behavior of adult salmonids at hydroelectric dams. This report presents the results of six studies on migration of adult chinook salmon, Oncorhynchus tshawytscha, and steelhead trout, Salmo gairdneri, in the lower Columbia River. The studies were conducted from 1971 to 1977 and concern safe passage of these fish over hydroelectric dams blocking the river.