1. U.S. Geological Survey; New Mexico Cooperative Fish and Wildlife Research Unit; 2980 South Espiña Street, Knox Hall Room 132 Las Cruces New Mexico 88003 USA
2. Department of Fish, Wildlife and Conservation Ecology; New Mexico State University; 2980 South Espiña Street, Knox Hall, Room 132 Las Cruces New Mexico 88003 USA
3. U.S. Fish and Wildlife Service; Southwestern Native Aquatic Resources and Recovery Center; 7116 Hatchery Road Dexter New Mexico 88230 USA
4. Applied Statistics Program; New Mexico State University; Box 30001/MSC 3CQ Las Cruces New Mexico 88003 USA