Bluefin Tuna (IMAGE) Terry Collins Assoc Caption A 10-year research project using tags and listening lines in Canada's Gulf of St. Lawrence sheds light on the species' natural mortality as well as migration, important information for sustainable management of their populations. Credit Hopkins Marine Station 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.