1. U.S. Geological Survey Great Lakes Science Center Hammond Bay Biological Station Millersburg MI USA
2. Minnesota Department of Natural Resources Lake Superior Area Fisheries Office Duluth MN USA
3. Wisconsin Department of Natural Resources Bayfield WI USA
4. U.S. Geological Survey Great Lakes Science Center Lake Superior Biological Station Ashland WI USA
5. U.S. Fish and Wildlife Service Green Bay Fish and Wildlife Conservation Office New Franken WI USA