Studies into Factors Limiting the Abundance of Okanagan and Wenatchee Sockeye Salmon in 2016 and 2017
A total of 1655 Sockeye Salmon, Oncorhynchus nerka, were sampled and PIT tagged at the Bonneville Dam Adult Fish Facility in 2016, while 1092 were PIT tagged in 2017. 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. Upstream detections of adult PIT tagged Sockeye Salmon tracked by this project resulted in an estimated survival in 2016 of 89.2% to McNary Dam and 81.2% to Rock Island Dam for 2016. In 2017, estimated survival to McNary was 81.7% and 70.8% to Rock Island Dam.
Fryer, J.K., D. Kelsey, H. Wright, S. Folks, R. Bussanich, K.D. Hyatt, D. Selbie, and M.M. Stockwell. 2018. Studies into factors limiting the abundance of Okanagan and Wenatchee Sockeye Salmon in 2016 and 2017. Columbia River Inter-Tribal Fish Commission Technical Report 18-02 for U.S. Dept. of Energy Bonneville Power Administration Report Project 2008-503-00. Portland, OR. 224p.