1. Department of Natural Resources Ecology and Management, Oklahoma State University, Stillwater, OK, USA
2. Norwegian Institute for Nature Research, 5685 Torgarden, 7485 Trondheim, Norway
3. New Mexico Department of Game and Fish, Las Cruces, NM, USA
4. Department of Fish, Wildlife and Conservation Ecology, New Mexico State University, Las Cruces, NM, USA
5. U.S. Geological Survey, New Mexico Cooperative Fish and Wildlife Research Unit, Las Cruces, NM, USA