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Counting Harp Seals with ultra-violet photography

Published online by Cambridge University Press:  27 October 2009

D. M. Lavigne
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Extract

The Harp Seal Pagophilus groenlandicus is a gregarious, migratory seal inhabiting Arctic and sub-Arctic waters of the North Atlantic Ocean. In spring, asthe ice recedes, the largest of three known breeding populations migrates up the east coas of Canada from the Gulf of St Lawrence, along the coast of Labrador, to the Canadian Archipelago, Hudson Bay, and the west coast of Greenland. After spending the summer feeding in Arctic waters, the seals move southward ahead of the Arctic ice pack, reaching the coast of Labrador and the Gulf of St Lawrence sometime in late December or early January. They reappear at the end of February and in early March in whelping ‘patches’ or concentrations on ice inthe Gulf of St Lawrence west of the Magdalen Islands, and off the coast of Labrador in an areaknown as the ‘Front’. One of the two smaller and probably distinct breeding populations is to be found in the White Sea, the other in the Vestisen [West Ice] between Jan Mayen and Svalbard.

Type
Articles
Information
Polar Record , Volume 18 , Issue 114 , September 1976 , pp. 269 - 277
Copyright
Copyright © Cambridge University Press 1976

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References

Benjaminsen, T. and Øritsland, T. 1975. The survival of year-classes and estimates of production and sustainable yield of northwest Atlantic harp seals. International Northwest Atlantic Fisheries. Research Document, No 75/121.Google Scholar
Fisher, H. D. Utilization of Atlantic Harp Seal populations. Transactions of the Twentieth North American Wildlife Conference, p 507–18.Google Scholar
Lavigne, D. M. and Øritsland, N. A. 1974a. Ultra-violet photography: a new application for remote sensing of mammals. Canadian Journal of Zoology, Vol 52, No 7, p 939–41.CrossRefGoogle Scholar
Lavigne, D. M. and Ronald, K. 1975. Improved remote sensing techniques for evaluating seal populations. International Council for the Exploration of the Sea. Committee Meeting, Montreal, 1975, Section N:12.Google Scholar
Lavigne, D. M. and others. 1975a. Harp seal aerial censusing. A report prepared for the Committee on Seals and Sealing, and Canada Centre for Remote Sensing.Google Scholar
Lavigne, D. M. and others. 1975b. An aerial census of western Atlantic harp seals (Pagophilus groenlandicus) using ultra-violet photography. Paper submitted to the UN/FAO/Advisory Committee on Marine Resources Research Ad Hoc Group III, 31 09 1975, Seattle, Washington.Google Scholar
Mansfield, A. W. 1967. Seals of Arctic and eastern Canada. Fisheries Research Board of Canada. Bulletin, No 137.Google Scholar
Mendenhall, W. and others. 1971. Elementary survey sampling. Belmont, California, Wadsworth Publishing Company.Google Scholar
Øritsland, N. A. and Lavigne, D. M. 1976. Radiative surface temperatures of an exercising polar bear. Comparative Biochemistry and Physiology, Vol 53A, p 327–330.CrossRefGoogle Scholar
Polar Record. 1972. Canadian-Norwegian agreement on sealing. Polar Record, Vol 16, No 101, p 268–71.CrossRefGoogle Scholar
Sergeant, D. E. 1975a. Estimating numbers of harp seals. Rapport et Procès-verbaux des Réunions. Conseil Permanent International pour I'Exploration de la Mer, Vol 169, p 274–280.Google Scholar
Sergeant, D. E. 1975b. Interrelations of the Gulf and Front herds of harp seals, Pagophilus groenlandicus. Canadian Government-Industry Sealing Meeting, 25 02 1975. Document No R/l.Google Scholar
Snedecor, G. W. and Cochran, W. G. 1967. Statistical methods. 6th ed.Ames, Iowa State University Press.Google Scholar