Studies into Factors Limiting the Abundance of Okanagan and Wenatchee Sockeye Salmon in 2020
A total of 1757 Sockeye Salmon, Oncorhynchus nerka, were sampled and 1751 PIT tagged at the Bonneville Dam Adult Fish Facility (AFF) in 2020. Sockeye Salmon tagged by this project, along with previously PIT tagged Sockeye Salmon also sampled, were tracked upstream using data from detection arrays at mainstem Columbia River dam fish ladders as well as in-river arrays in the Wenatchee and Okanagan basins. Upstream detections of PIT tagged Sockeye Salmon tagged by this project at Bonneville Dam resulted in an estimated survival in 2020 of 90.4% to McNary Dam and 77.3% to Rock Island Dam.
Fryer, J.K., D. Kelsey, H. Wright, S. Folks, R. Bussanich, K.D. Hyatt, A. Ogden, and H. Stiff. 2022. Studies into factors limiting the abundance of Okanagan and Wenatchee Sockeye Salmon in 2020. Columbia River Inter-Tribal Fish Commission Technical Report 22-02 for U.S. Dept. of Energy Bonneville Power Administration Project 2008-503-00. 104p.