1. Virginia Polytechnic Institute and State University, Department of Fish and Wildlife Conservation, 149 Cheatham Hall, Virginia Tech, Blacksburg, VA 24061, USA
2. US Geological Survey, Virginia Cooperative Fish and Wildlife Research Unit, 106 Cheatham Hall, Blacksburg, VA 24061, USA
3. Fort Drum Military Installation, Directorate of Public Works, Natural Resource Branch, T-4848 Delahanty Ave., Fort Drum, NY 13602-5097, USA
4. West Virginia Division of Natural Resources, Box 67, Elkins WV 24261, USA