1. Department of Biology, University of Nebraska–Kearney, Bruner Hall of Science, 2401 11th Street, Kearney, NE 68849;
2. Nebraska Game and Parks Commission, Fisheries Division, 301 E State Farm Road, North Platte, NE 69101;
3. Nebraska Cooperative Fish and Wildlife Research Unit, School of Natural Resources, University of Nebraska, Lincoln, NE 68583;
4. Nebraska Game and Parks Commission, Fisheries Division, 1617 First Avenue, Kearney, NE 68847;
5. Minnesota Department of Natural Resources, 23070 North Lakeshore Drive, Glenwood, MN 56334;
6. Wildlife Program, Colorado State University Pueblo, 2200 Bonforte Boulevard, Pueblo, CO 81001