1. Oklahoma Cooperative Fish and Wildlife Research Unit, Oklahoma State University, Stillwater, OK 74078.
2. Oklahoma Department of Wildlife Conservation, Jenks, OK 74037.
3. Department of Biological Sciences, The University of Alabama in Huntsville, Huntsville, AL 35899.
4. US Geological Survey, Oklahoma Cooperative Fish and Wildlife Research Unit, Oklahoma State University, Stillwater, OK 74078.