1. Department of Natural Resource Ecology and Management; Iowa State University; 339 Science II Ames IA 50011 USA
2. National Oceanic and Atmospheric Administration; Honolulu HI 96818 USA
3. U.S. Geological Survey, Wisconsin Cooperative Wildlife Research Unit; University of Wisconsin; 204 Russell Labs, 1630 Linden Dr. Madison WI 53706 USA
4. Department of Molecular, Cellular and Biomedical Sciences; University of New Hampshire; 291 Rudman Hall Durham NH 03824 USA