Affiliation: | 1. Department of Fish and Wildlife Conservation, Virginia Tech, Blacksburg, VA, U.S.A.;2. Virginia Cooperative Fish and Wildlife Research Unit, U.S. Geological Survey, Virginia Tech, Blacksburg, VA, U.S.A.;3. West Virginia Cooperative Fish and Wildlife Research Unit, U.S. Geological Survey, West Virginia University, Morgantown, WV, U.S.A. |