Salmon (IMAGE) University of California - Davis Caption Coho and Chinook salmon survival rates are growing increasingly similar in the Northern Pacific and are influenced by El Nino-associated weather patterns, UC Davis scientists found. Credit Carson Jeffres/UC Davis Usage Restrictions Provide credit. 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.