1. Western Ecosystems Technology, Inc. 200 South 2nd Street Laramie Wyoming 82070 USA
2. Department of Environmental Science, Policy, and Management University of California, Berkeley 130 Hilgard Way Berkeley California 94720 USA
3. Wyoming Cooperative Fish and Wildlife Research Unit Department of Zoology and Physiology University of Wyoming Laramie Wyoming 82071 USA
4. U.S. Geological Survey Wyoming Cooperative Fish and Wildlife Research Unit Department of Zoology and Physiology University of Wyoming Laramie Wyoming 82071 USA
5. Haub School of Environment and Natural Resources University of Wyoming Laramie Wyoming 82071 USA