1. US Geological Survey, Virginia Cooperative Fish and Wildlife Research Unit, Department of Fish and Wildlife Conservation, Virginia Tech, 310 W. Campus Dr., Blacksburg, VA 24061, USA
2. Department of Biology, Georgia Southern University, 1332 Southern Dr., Statesboro, GA 30458, USA
3. US Geological Survey, Western Ecological Research Center, 160 N. Stephanie Dr., Henderson, NV 89074, USA
4. US Environmental Protection Agency, Region 7, 11201 Renner Blvd., Lenexa, KS 66219, USA
5. Department of Natural Resources and Environmental Science, University of Nevada - Reno, 1664 N. Virginia St., Reno, NV 89557, USA