A small number of captures are reported in DFO at-sea observer data² (DFO Gulf, 1997-2013) off the western coast of Newfoundland and in the Cabot Strait. A few may be cases of misidentification of the porbeagle shark (Lamna nasus), which is frequently mistaken for the shortfin mako in the St. Lawrence, but DFO officials are confident that the majority of these reported sightings are indeed the shortfin mako. If you have any further evidence that would confirm the presence of the shortfin mako in the Gulf of St. Lawrence, please contact us.
¹ Templeman, W. 1963. Distribution of sharks in the Canadian Atlantic (with special reference to Newfoundland waters). Bulletin of the Fisheries Research Board of Canada 140. 77 pp.
² Showell, M.A., G.M. Fowler, W. Joyce, M. McMahon, C.M. Miri, and M.R. Simpson. 2017. Current status and threats to the North Atlantic shortfin mako shark (Isurus oxyrinchus) population in Atlantic Canada. DFO Can. Science Advisory Secretariat Research Document 2017/039. v + 45 p.