Re-Colonization of the Upper Cedar River by Anadromous Salmonids

Thomas Quinn, School of Aquatic & Fishery Sciences, University of Washington

R/F-159

Recent dam modifications have allowed Coho and Chinook salmon to re-colonize the upper Cedar River watershed.  For the past three years, data have been collected on all salmon entering the watershed. From this and other data, project team members will explore the origins of the fish populations – whether they are returning generations or a constant influx of strays from populations below the dams – and how traits such as body size and spawning date affect the reproductive success in this re-colonization event. The results will shed light on the factors spelling success or failure in salmon re-colonization efforts.