Researcher Brooke Penaluna (IMAGE) Oregon State University Caption USDA Forest Service research fish biologist Brooke Penaluna collects water samples to test for fish eDNA. Credit Courtesy Brooke Penaluna 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.