1. Département de biologie; NSERC-Université Laval Industrial Research Chair in Sylviculture and Wildlife; Université Laval; Québec QC GIV 0A6 Canada
2. Laurentian Forestry Centre; Canadian Forest Service; Natural Resources Canada; 1055 du P.E.P.S., P.O. Box 10380, Stn. Sainte-Foy Québec QC G1V 4C7 Canada