Guppies in a River Tributary (IMAGE) University of California - Riverside Caption Natural settings allow comparative studies of guppies to see how the life histories of those who lived with and without predators differed. Credit David Reznick / UCR 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.