1. Oklahoma Cooperative Fish and Wildlife Research Unit, Oklahoma State University, Stillwater, Oklahoma 74078; Email: mollenh@okstate.edu.
2. Department of Biosystems and Agricultural Engineering, Oklahoma State University, Stillwater, Oklahoma 74078; Email: yan.zhou@okstate.edu.
3. U.S. Geological Survey, Oklahoma Cooperative Fish and Wildlife Research Unit, Oklahoma State University, Stillwater, Oklahoma 74078; Email: shannon.brewer@okstate.edu. Send reprint requests to this address.