1. Department of Natural Resource Management South Dakota State University Brookings South Dakota 57006 USA
2. Center for Fisheries, Aquaculture, and Aquatic Sciences Southern Illinois University Carbondale Illinois 62901 USA
3. U.S. Fish and Wildlife Service La Crosse Fish Health Center Onalaska Wisconsin 54650 USA
4. U.S. Fish and Wildlife Service La Crosse Fish and Wildlife Conservation Office Onalaska Wisconsin 54650 USA
5. Illinois Department of Natural Resources Havana Illinois 62644 USA
6. Department of Natural Resources Purdue University West Lafayette Indiana 47906 USA