1. Department of Wildlife and Fisheries Sciences, Box 2140B, South Dakota State University, Brookings, South Dakota 57007, USA
2. Present address: College of Forest Resources, University of Washington, AR-10, Seattle, Washington 98195, USA
3. Custer State Park, HC 83 Box 70, Custer, South Dakota 57730, USA
4. Veterinary Technology Program, UPO 995, Morehead State University, Morehead, Kentucky 40351, USA
5. Fort Dodge Laboratories, P.O. Box 518, Fort Dodge, Iowa 50501, USA