STATUS OF THE RISSO'S DOLPHIN, GRAMPUS GRISEUS, IN CANADA


Robin W. Baird and Pam J. Stacey

Canadian Field-Naturalist 105:233-242. 1991. Download Adobe PDF copy

In the eastern North Pacific and the western North Atlantic, the Risso's dolphin(Grampus griseus) reaches its northern limits in Canadian waters, and is rare in Canada. General biology, world-wide status and management are reviewed. Twenty-one records from Canadian waters are presented. Records from the Pacific coast of Canada are from throughout the year and show no seasonal trends. Little information is available on stocks or population estimates, but Risso's dolphins are not uncommon worldwide. They are taken only in small numbers in whaling and incidentally in fisheries. The effects of longterm degredation of its environment and subsequent impact on its populations are potentially serious and should be monitored.

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