1. Forest Economics and Ecology Section, Wisconsin Department of Natural Resources, 107 Sutliff Ave., Rhinelander, Wisconsin 54501, USA
2. Center for Water and the Environment, University of Minnesota, Duluth, 1049 University Dr., Duluth, Minnesota 55811, USA
3. Fisheries and Wildlife Division, Minnesota Department of Natural Resources, 500 Lafayette Rd., St. Paul, Minnesota 55155, USA
4. Fisheries and Wildlife Division, Minnesota Department of Natural Resources, 5463 W Broadway, Forest Lake, Minnesota 55025, USA