SEAGULLS (IMAGE) University of Barcelona Caption According to the study, seagulls could act as sentinels of the antibiotic pressure in the environment. Credit Marta Cerdà (CReSA-IRTA) Usage Restrictions The image may only be used with appropriate caption or 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.