1. Idaho Cooperative Fish and Wildlife Research Unit Department of Fish and Wildlife Sciences University of Idaho 875 Perimeter Drive, Mail Stop 1141 Moscow Idaho 83844USA
2. U.S. Geological Survey Idaho Cooperative Fish and Wildlife Research Unit Department of Fish and Wildlife Sciences University of Idaho 875 Perimeter Drive, Mail Stop 1141 Moscow Idaho 83844USA
3. Idaho Department of Fish and Game 2885 West Kathleen Avenue Coeur d'Alene Idaho 83815 USA