Canada Gazette 2005: The working groups concluded that the primary causes of the population growth are human-induced. Improved nutrition from agricultural practices and safety in refuges have resulted in increased survival and reproductive rates of snow geese. "Regulations Amending the Migratory Birds Regulations". Canada Gazette. 22 March 2005. Archived from the original on 7 October 2011. Retrieved 2010-12-15.
Canada Gazette 2005: The working groups concluded that the primary causes of the population growth are human-induced. Improved nutrition from agricultural practices and safety in refuges have resulted in increased survival and reproductive rates of snow geese. "Regulations Amending the Migratory Birds Regulations". Canada Gazette. 22 March 2005. Archived from the original on 7 October 2011. Retrieved 2010-12-15.