1. Oklahoma Cooperative Fish and Wildlife Research Unit, 404 Life Sciences West, Oklahoma State University, Stillwater, Oklahoma 74078, USA
2. United States Geological Survey, Oklahoma Cooperative Fish and Wildlife Research Unit, 404 Life Sciences West, Oklahoma State University, Stillwater, Oklahoma 74078, USA
3. Department of Biological Sciences, University of Arkansas, Fayetteville, Arkansas 72701, USA
4. Arkansas Game and Fish Commission, PO Box 729, Hwy 56 East, Calico Rock, Arkansas 72519, USA