Joshua Roering, University of Oregon (IMAGE) University of Oregon Caption Joshua Roering, University of Oregon, Department of Geological Sciences, has found that coho salmon thrive and prefer in broad flat valleys with multiple small tributaries in areas formed by ancient landslides. Credit University of Oregon Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.