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Aerial survey of walrus haul-out sites in west Spitsbergen and Moffen

Published online by Cambridge University Press:  27 October 2009

E. Cruwys  and
Dan Weinstein
E. Cruwys
Affiliation:
Scott Polar Research Institute, University of Cambridge, Lensfield Road, Cambridge CB2 1ER
Dan Weinstein
Affiliation:
3 Ridgley Terrace, Jamestown, NY 14701, USA
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Abstract

In July 1992 two aerial surveys were conducted to assess the size of the walrus (Odobenus rosmarus rosmarus) population at haul-out sites reported on the northwest coast of Spitsbergen and on Moffen. Walrus have been extensively hunted in Svalbard during the past 350 years, and in 1952 concern about decreasing stocks caused the Norwegian government to pass a law protecting the animals from hunting. At the time of the survey, it is likely that the walrus would have been at some stage of the moult, and it is tentatively suggested that the physiological changes reported to take place during moulting can cause lethargy and sluggishness that may make walrus less susceptible to disturbance by engine noise. Thirty-seven walrus were counted on the survey around Moffen, and three walrus on the northwest coast of Spitsbergen three days later.

Type
Articles
Information
Polar Record , Volume 29 , Issue 168 , January 1993 , pp. 55 - 58
Copyright
Copyright © Cambridge University Press 1993

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References

Brueggeman, J.J., Green, G.A., Grotefendt, R.A., and Chapman, D.G.. 1989. Aerial surveys of endangered cetaceans and other marine mammals in the northwestern Gulf of Alaska and southeastern Bering Sea. Outer Continental Shelf Environmental Assessment Program. Final Reports of Principal Investigators 61: 1–124.Google Scholar
Butler, R.G., and Muller-Schwarze, D.. 1977. Penguin census by aerial photographic analysis at Cape Crozier, Ross Island. Antarctic Journal of the United States 12: 25–27.Google Scholar
Crete, M., Vandal, D., Rivest, L.-P., and Potvin, F.. 1991. Double counts in aerial surveys to estimate polar bear numbers during the ice-free period. Arctic 44 (4): 275–78.CrossRefGoogle Scholar
Degtyarev, A.G. 1990. Opyt aerovizual'nogo ucheta rozovoy chayki (Rhodostethia rosea) v tundrakh Yakutii [A method of aerial census of Ross' gull (Rhodostethia rosea) in the tundras of Yakutiya]. Zoologicheskiy Zhurnal 70 (2): 81–85.Google Scholar
Fay, F.H. 1981. Walrus — Odobenus rosmarus rosmarus. In: Ridgway, S.H., and Harrison, R.J. (editors). Handbook of marine mammals. London: Academic Press.Google Scholar
Fay, F.H. 1982. Ecology and biology of the Pacific walrus, Odobenus rosmarus divergens Illiger. North American Fauna74.Google Scholar
Frost, K.J., and Lowry, L.F.. 1988. Effects of industrial activities on ringed seals in Alaska, as indicated by aerial surveys. In: Sackinger, W.M., and Jeffries, M.O. (editors). Port and ocean engineering under Arctic conditions. Vol. 2. Symposium on noise and marine mammals. Fairbanks: University of Alaska Fairbanks Geophysical Institute, 15–25.Google Scholar
Gasaway, W.C., Dubois, S.D., Reed, D.J., and Harbo, S.J.. 1986. Estimating moose population parameters from aerial surveys. University of Alaska Biological Papers 22.Google Scholar
Gjertz, I., and Wiig, ø. 1992. Feeding of walrus Odobenus rosmarus in Svalbard. Polar Record 28 (164): 57–58.CrossRefGoogle Scholar
King, J.E. 1983. Seals of the world. London: British Museum (Natural History) and Oxford University Press.Google Scholar
Krawczyk, A., and Weslawski, J.M.. 1987. Remarks on the past and present records of walrus, Odobenus rosmarus Linneaus, 1758 from south Spitsbergen coasts. Polish Polar Research 8 (2): 135–43.Google Scholar
Lønø, O. 1972. The catch of walrus (Odobenus rosmarus) in the areas of Svalbard, Novaja Zemlja and Franz Josef Land. Norsk Polarinstitutt Arbok 1970: 199–212.Google Scholar
Mansfield, A.W., and St Aubin, D.J.. 1991. Distribution and abundance of the Atlantic walrus, Odobenus rosmarus rosmarus, in the Southampton Island-Coats Island region of northern Hudson Bay. Canadian Field Naturalist 105 (1): 95–100.CrossRefGoogle Scholar
Miller, E.H. 1991. Communication in pinnipeds, with special reference to non-acoustic signalling. In: Renouf, D. (editor). The behaviour of pinnipeds. London: Chapman and Hall, 128–235.CrossRefGoogle Scholar
Myers, R.A., and Bowen, W.D.. 1989. Estimating bias in aerial surveys of harp seal pup production. Journal of Wildlife Management 53 (2): 361–72.CrossRefGoogle Scholar
Shaughnessy, P.D. 1987. Population size of the Cape fur seal Arctocephaluspusillus. 1. From aerial photography. Cape Town: Republic of South Africa, Department of Environment Affairs. (Sea Fisheries Research Institute Investigational Report 130.)Google Scholar
Sladen, W.J.L., , R. E and Le Resche, . 1970. New and developing techniques in Antarctic ornithology. ln: Holdgate, M.W. (editor). Antarctic ecology. London: Academic Press, 585–96.Google Scholar
Stonehouse, B. 1969. Air census of two colonies of Adelie penguins (Pygoscelis adeliae) in Ross Dependency, Antarctica. Polar Record 14 (91): 471–75.CrossRefGoogle Scholar
Stora, N. 1987. Russian walrus hunting in Spitsbergen. Etudes Inuit Studies 11 (2): 117–37.Google Scholar
Taylor, R.H., Wilson, P.R., and Thomas, B.W.. 1990. Status and trends of Adélie penguin populations in the Ross Sea region. Polar Record 26 (159): 293–304.CrossRefGoogle Scholar
Treacy, S.D. 1991. Aerial surveys of endangered whales in the Beaufort Sea, fall 1990. Anchorage: US Department of the Interior, Minerals Management Service. (Alaska Outer Continental Shelf Study MMS 91–0055.)Google Scholar
Wartzok, D. 1991. Physiology of behaviourin pinnipeds. In: Renouf, D. (editor). The behaviour of pinnipeds. London: Chapman and Hall, 236–299.CrossRefGoogle Scholar