1. Department of Forestry, Wildlife and Fisheries University of Tennessee, 2431 Joe Johnson Drive Knoxville TN 37996 U.S.A.
2. Fisheries, Wildlife, and Conservation Biology Program, Department of Forestry and Environmental Resources North Carolina State University Raleigh NC 27695 U.S.A.
3. University of Minnesota, 1530 Cleveland Avenue N, Department of Forest Resources, St. Paul MN 55108 U.S.A.