By Elisabeth Pernicone
Great Lakes Echo
Oct. 9, 2009
Fish with characteristics of both genders are more prevalent than previously thought in U.S. rivers, according to a recent U.S. Geological Survey study.
While this study did not analyze fish in the Great Lakes, it may raise new concerns as to whether previously noted hermaphrodite fish in this region are becoming more prevalent as well.
“Until we take current sampling it is hard to know,” said Chris Metcalf, director of the Institute for Watershed Science at Trent University in Ontario. “However, all studies are symptomatic of …