1. Acadia University, Department of Biology, 33 Westwood Avenue, Wolfville, NS B4P 2R6, Canada.
2. Nova Scotia Department of Fisheries and Aquaculture: Inland Fisheries Division, 91 Beeches Road, Pictou, NS B0K 1H0, Canada.
3. New Brunswick Department of Natural Resources and Energy Development, Hugh John Flemming Forestry Complex, 1350 Regent Street, Fredericton, NB E3C 2G6, Canada.
4. Canadian Rivers Institute, Department of Biology, Faculty of Forestry and Environmental Management, University of New Brunswick, PO Box 4400, Fredericton, NB E3B 5A3, Canada.