Limiting Factors of the Abundance of Okanagan and Wenatchee Sockeye Salmon in 2012
A total of 1610 sockeye salmon, Oncorhynchus nerka, were PIT tagged at the Bonneville Dam Adult Fish Facility in 2012. An additional 752 sockeye salmon were PIT tagged at the east bank Priest Rapids Dam ladder trapping facility. These fish, along with previously PIT tagged sockeye also sampled, were tracked upstream using data from detection arrays at mainstem Columbia River dam fish ladders as in-river arrays in the Wenatchee and Okanagan basins. Using data from PIT tags deployed at Bonneville Dam, the estimated stock composition of sockeye salmon was 82.4% Okanagan and 17.6% Wenatchee. Using data from PIT tags deployed at Priest Rapids Dam, the estimated stock composition was 80.3% Okanagan and 19.7% Wenatchee. A variety of other migration timing and age composition analyses is also available in this report.
Jeffrey K. Fryer, Wright H., Folks S., Bussanich R., Hyatt K., Stockwell M., 2014. Limiting Factors of the Abundance of Okanagan and Wenatchee Sockeye Salmon in 2012. Columbia River Inter-Tribal Fish Commission Technical Report 14-01 for U.S. Dept. of Energy Bonneville Power Administration Report Project 2008-503-00. 155p.