Mesocosm Experiment (IMAGE) Hiroshima University Caption This image shows a mesocosm experiment that involves different numbers of common carp. Credit Institute for Sustainable Sciences and Development, Hiroshima University 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.