Steelhead Trout (image) EurekAlert! Share Print E-Mail Caption These are steelhead trout drift in an Oregon stream. Related news release: DNA evidence shows that salmon hatcheries cause substantial, rapid genetic changes Credit Photo by John McMillan, courtesy of Oregon State University Usage Restrictions None Share Print E-Mail 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.