Upstream Migration Timing of Columbia Basin Chinook and Sockeye Salmon and Steelhead in 2018
Between April 25 and October 12, 2018, we sampled Chinook (Oncorhynchus tshawytscha) and Sockeye (Oncorhynchus nerka) salmon as well as steelhead (Oncorhynchus mykiss) at the Bonneville Dam Adult Fish Facility (AFF). Fish were measured for fork length, scales were collected for analysis of age, tissue samples collected for genetic analysis, and the fish were tagged with Passive Integrated Transponder (PIT) tags. These fish were tracked upstream as they passed through sites with PIT tag antennas, including fish ladders at dams, juvenile bypasses, hatcheries, and weirs, as well as in-stream antennas. Total numbers of fish tracked upstream were 1,269 spring Chinook, 643 summer Chinook, 1,266 fall Chinook, 893 steelhead, and 1,848 Sockeye Salmon.
Fryer, J.K., J. Whiteaker, D. Kelsey, and J. Hess 2020. Upstream Migration Timing of Columbia Basin Chinook and Sockeye Salmon and Steelhead in 2018. Columbia River Inter-Tribal Fish Commission Technical Report 20-02 for U.S. Dept. of Energy Bonneville Power Administration Project 2008-518-00. 144p.