Environment Canada;
National Wildlife Research Centre;
Carleton University;
Ottawa;
Canada K1A0H3;
Wisconsin Department of Natural Resources;
107 Sutliff Ave;
Rhinelander;
WI 54501-3349;
USA;
Department of Biology and the River Studies Center;
University of Wisconsin a Crosse;
1725 State St;
La Crosse;
WI 54601;
USA;
Great Lakes Natural Resource Center;
National Wildlife Federation;
213 West Liberty St;
Suite200;
Ann Arbor;
MI 48104-1398;
USA;
不详;