Preventing Barotrauma (IMAGE) DOE/Pacific Northwest National Laboratory Caption Researcher John Stephenson observes young salmon in a chamber used to simulate the conditions that fish sometimes experience as they travel through a dam. Credit Photo courtesy of PNNL 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.