A new study finds that one ot of five male black bass in American river basins have egg cells growing inside their sexual organs. The study by the U.S. Geological Survey shows that in parts of the Mississippi River in Minnesota 70 percent of the smallmouth bass had female characteristics. MPR's Cathy Wurzer spoke with Heiko Schoenfuss, the Director of the Aquatic Toxicology Laboratory at St. Cloud State University. He says the study confirms what he's been finding in his research.