Pallid Sturgeon (IMAGE) University of Nebraska-Lincoln Caption New research has found that pallid sturgeon stocked in a northerly segment of the Missouri River live an average of three times longer, produce roughly 10 times as many eggs and weigh up to seven times more than specimens stocked downriver. The findings represent a dramatic example of how environmental conditions -- in this case, fast-flowing channels introduced via human intervention -- can shape the life cycle of a species. Credit Photo: Sam Stukel, U.S. Fish and Wildlife Service / Illlustration: University of Nebraska-Lincoln 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.