1. School of Forest Resources, University of Maine, 5755 Nutting Hall, Orono, Maine 04469, USA
2. School of Food and Agriculture, University of Maine, 5735 Hitchner Hall, Orono, Maine 04469, USA
3. Maine Department of Inland Fisheries and Wildlife, 650 State Street, Bangor, Maine 04401, USA
4. Department of Natural Resources and the Environment, University of New Hampshire, 114 James Hall, Durham, New Hampshire 03824, USA