1. Michigan Department of Natural Resources, Lake Huron Fisheries Research Station, 160 East Fletcher Street, Alpena, MI 49707, USA
2. U.S. Geological Survey, Great Lakes Science Center, 1451 Green Road, Ann Arbor, MI 48105, USA
3. Michigan Department of Natural Resources, Lake St. Clair Fisheries Research Station, 33135 South River Road, Harrison Township, MI 48045, USA