Studies into Factors Limiting the Abundance of Okanagan and Wenatchee Sockeye Salmon in 2015
A total of 916 Sockeye Salmon, Oncorhynchus nerka, were PIT tagged at the Bonneville Dam Adult Fish Facility in 2015. High temperatures prevented sampling during two weeks and restricted sampling during two additional weeks. Sockeye PIT 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. Using data from PIT tags deployed at Bonneville Dam and detected in the system, the estimated stock composition of Sockeye Salmon was 78.4% Okanagan, 21.1% Wenatchee, and 0.5% Snake.
Fryer, J.K., D. Kelsey, H. Wright, S. Folks, R. Bussanich, K.D. Hyatt, and M.M. Stockwell. 2017. Studies into factors limiting the abundance of Okanagan and Wenatchee Sockeye Salmon in 2015. Columbia River Inter-Tribal Fish Commission Technical Report 17-06 for U.S. Dept. of Energy Bonneville Power Administration Report Project 2008-503-00. Portland, OR. 217p.