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Scientific Report

Limiting Factors of the Abundance of Okanagan and Wenatchee Sockeye Salmon in 2011

Abstract

A total of 763 sockeye salmon, Oncorhynchus nerka, were PIT tagged at the Bonneville Dam Adult Fish Facility in 2011. These fish, in addition to three previously PIT tagged sockeye salmon we sampled at Bonneville Dam, were tracked upstream using data from detection arrays within fish ladders at Bonneville, McNary, Priest Rapids, Rock Island, Rocky Reach, Wells, Ice Harbor, Lower Granite, and Tumwater dams as well as in-river arrays in the Wenatchee and Okanagan basins. The estimated stock composition of sockeye salmon passing Bonneville Dam was 76.8% Okanagan 21.9% Wenatchee, and 1.3% Snake.

Authors

Jeffrey K. Fryer, Howie Wright, Skyeler Folks, Kim Hyatt, and Margot Stockwell

Citation

Fryer, J.K., H. Wright, S. Folks, K. Hyatt, and M. Stockwell. 2012. Limiting Factors of the Abundance of Okanagan and Wenatchee Sockeye Salmon in 2011. Columbia River Inter-Tribal Fish Commission Technical Report #12-08, Portland, Oregon.

Date

Aug 10th, 2012

Report No.

12-08

Media Type

CRITFC Technical Report

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