Status of harbour seals (Phoca vitulina) in Atlantic Canada

  • Mike O Hammill Maurice Lamontagne Institute, Department of Fisheries and Oceans Canada. Box 1000, Mont Joli, QC. G5H 3Z4, Canada
  • W Don Bowen Bedford Institute of Oceanography. 1 Challenger Drive. P.O. Box 1006, Dartmouth, NS, B2Y 4A2, Canada
  • Becky Sjare Northwest Atlantic Fisheries Science Centre. Dept. of Fisheries and Oceans. P.O. Box 5667. 80 White Hills Road, St. John’s, NL A1C 5X1, Canada
Keywords: harbour seals, Canada, population status

Abstract

Harbour seals are associated with small islets, reefs and rocks exposed at low tide and estuarine habitats throughout eastern Canada. Evidence of harvesting by indigenous people has been found in pre-European contact archaeological excavations. A bounty harvest as well as subsistence and commercial hunting probably lead to a decline in the population from 1949 to the early 1970s. The bounty was removed in 1976, and harbour seals, in the southern parts of their range have been protected since then. There is little information available on total abundance and current population trend. Mitochondrial and microsatellite DNA research has shown separation between Northeast and Northwest Atlantic harbour seals. Within Canada, the subspecies Phoca vitulina concolor shows some population sub-structure with three distinct units that could be separated into Hudson Bay, Gulf of St. Lawrence and Sable Island. Urban development resulting in habitat degradation is probably the most important factor affecting harbour seal populations in AtlanticCanada, although other factors such as incidental catches in commercial fisheries and competition with grey seals may also be important.
Published
2010-09-01
How to Cite
Hammill, M. O., Bowen, W. D., & Sjare, B. (2010). Status of harbour seals (<i>Phoca vitulina</i>) in Atlantic Canada. NAMMCO Scientific Publications, 8, 175-189. https://doi.org/10.7557/3.2684