1. Department of Wildlife, Fisheries, and Conservation Biology University of Maine at Orono 5755 Nutting Hall, Room 202 Orono Maine 04469‐5755 USA
2. Fisheries and Oceans Canada Science Branch Maritimes Region Post Office Box 1006 Dartmouth Nova Scotia B2Y 4A2 Canada
3. U.S. Geological Survey Maine Cooperative Fish and Wildlife Research Unit, 5755 Nutting Hall University of Maine Orono Maine 04496 USA