Studies into Factors Limiting the Abundance of Okanagan and Wenatchee Sockeye Salmon in 2021 and 2022
Abstract
A total of 1542 Sockeye Salmon, Oncorhynchus nerka, were sampled and 1499 PIT tagged at the Bonneville Dam Adult Fish Facility (AFF) in 2021; while in 2022 1375 were sampled and 1364 PIT tagged. 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. Tracked upstream of Bonneville Dam were 1400 Sockeye Salmon in 2021 and 1354 in 2022. Upstream detections of PIT-tagged Sockeye Salmon tagged by this project at Bonneville Dam resulted in an estimated survival in 2021 of 70.4% to McNary Dam and 53.3% to Rock Island Dam compared to 91.3% to McNary Dam and 83.6% to Rock Island Dam in 2022.
Authors
Citation
Fryer, J.K., D. Kelsey, S. Folks, R. Bussanich, C. Simpson, A. Ogden, H. stiff, and K.D. Hyatt. 2021. Studies into factors limiting the abundance of Okanagan and Wenatchee Sockeye Salmon in 2021 and 2022. Columbia River Inter-Tribal Fish Commission Technical Report 24-01, for U.S. Dept. of Energy Bonneville Power Administration Project 2008-503-00. Portland, OR. 180p.