Mark Pegg, University of Nebraska-Lincoln (IMAGE) University of Nebraska-Lincoln Caption Mark Pegg, professor of fish ecology at the University of Nebraska-Lincoln, holds a pallid sturgeon. Credit Mark Pegg 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.