1. Great Lakes Science Center, U.S. Geological Survey, 1451 Green Road, Ann Arbor, Michigan 48105, United States
2. Upper Midwest Water Science Center, U.S. Geological Survey, 8505 Research Way, Middleton, Wisconsin 53562, United States
3. Environmental Chemistry and Technology Program, University of Wisconsin, 660 North Park Street, Madison, Wisconsin 53706, United States
4. Anchorage Fish and Wildlife Conservation Office, U.S. Fish and Wildlife Service, 4700 BLM Road, Anchorage, Alaska 99507, United States
5. Green Bay Fish and Wildlife Conservation Office, U.S. Fish and Wildlife Service, 2661 Scott Tower Drive, New Franken, Wisconsin 54229, United States