1. Department of Agronomy & Horticulture, University of Nebraska, Lincoln, NE 66583-0915, USA
2. Haub School of Environment and Natural Resources, Wyoming Cooperative Fish and Wildlife Research Unit, Department of Zoology and Physiology, University of Wyoming, 804 East Fremont Street, Laramie, WY 82072, USA
3. Department of Ecosystem Science and Management, University of Wyoming, 1000 E University Avenue, Laramie, WY 82071, USA
4. Wyoming Game and Fish Department, State of Wyoming, 260 Buena Vista Drive, Lander, WY 82520, USA
5. Wyoming Game and Fish Department, State of Wyoming, P.O. Box 186, Sinclair, WY 82334, USA