1. University of Maine, School of Food and Agriculture, 5735 Hitchner Hall, Orono, Maine 04469, USA
2. University of Maine, Department of Wildlife, Fisheries, and Conservation Biology, 5755 Nutting Hall, Orono, Maine 04469, USA
3. Maine Department of Inland Fisheries and Wildlife, 106 Hogan Road, Bangor, Maine 04401, USA
4. University of Maine at Augusta, College of Arts and Sciences, 102A Jewitt Hall, Augusta, Maine 04330, USA