Cooperative Fish and Wildlife Research Units Program: Oregon
Education, Research and Technical Assistance for Managing Our Natural Resources

Oregon Project

Condition and Spawning Success of Adult Spring Chinook Salmon in the Willamette River

September 2009 - June 2011


Participating Agencies

  • Corps of Engineers

1. Evaluate condition of adult spring Chinook salmon returning to Willamette Valley Projects and relate condition to spawning success and pre-spawn mortality levels. 2. Evaluate arriving and post-spawning spring Chinook salmon for other potential pre-spawning mortality causes including environmental stressors, disease, and parasites. 3. Develop methods for sampling adult migrants at Willamette Falls adult trap. 4. Compile and synthesize available literature for anadromous adult salmonid migration in the Willamette Valley ecosystem to identify current knowledge, identify critical knowledge gaps, and to provide a context to prioritize future research needs. The review will include analysis of radio-telemetry data collected by USACE personnel on the North Fork Middle Fork Willamette River in 2004-2007