Movements of female polar bears (Ursus maritimus) in the East Greenland pack ice

The movements of two adult female polar bears (Ursus maritimus) in East Greenland and the Greenland Sea area were studied by use of satellite telemetry between the fall of 1994 and the summer of 1998. One female was tracked for 621 days, the other for 1,415 days. During this time the females used maternity dens on land. If denning periods on land were excluded, the two females used between 73% and 100% of the tracking time offshore where they were able to navigate in the dynamic pack ice and counteract the fast southward movement of the ice (up to 30 km/h) in the East Greenland Current. Mean monthly movement rates varied between 0.32 and 0.76km/h. Both bears had very large home ranges (242,000 and 468,000 km2) within the dynamic pack ice of the Greenland Sea. The facts that the bears made extensive use of the offshore sea ice and that there is a marked reduction of the Greenland Sea ice call for a closer monitoring of the effects of this change on the East Greenland polar bear population.

[1]  I. Stirling,et al.  IMMOBILIZATION OF POLAR BEARS (URSUS MARITIMUS) WITH TELAZOL® IN THE CANADIAN ARCTIC , 1989, Journal of wildlife diseases.

[2]  Josefino C. Comiso,et al.  Characteristics of Arctic winter sea ice from satellite multispectral microwave observations , 1986 .

[3]  F. Messier,et al.  Activity and Movement Patterns of Polar Bears Inhabiting Consolidated versus Active Pack Ice , 2001 .

[4]  Don W. Hayne,et al.  Calculation of Size of Home Range , 1949 .

[5]  Andrew E. Derocher,et al.  Space-use strategies of female polar bears in a dynamic sea ice habitat , 2001 .

[6]  Josefino C. Comiso,et al.  A rapidly declining perennial sea ice cover in the Arctic , 2002 .

[7]  D. Douglas,et al.  Seasonal movements of adult female polar bears in the Bering and Chukchi seas , 1990 .

[8]  Torger Øritsland.  Norsk fangst og undersøkelse av sel i 1994 (Norwegian catches and investigations of seals in 1994) , 1995 .

[9]  Olga Pavlova,et al.  Female polar bears, Ursus maritimus, on the Barents Sea drift ice: walking the treadmill , 2003, Animal Behaviour.

[10]  C. Vibe,et al.  Satellite Radio-Tracking of Polar Bears between Svalbard and Greenland , 1983 .

[11]  S. Amstrup,et al.  Comparing movement patterns of satellite-tagged male and female polar bears , 2001 .

[12]  O. Wiig.  Distribution of polar bears (Ursus maritimus) in the Svalbard area , 1995 .

[13]  F. Messier,et al.  RELATIONSHIPS BETWEEN DENNING OF POLAR BEARS AND CONDITIONS OF SEA ICE , 2000 .

[14]  K. Aagaard,et al.  The East Greenland Current North of Denmark Strait: Part II , 1968 .

[15]  S. Amstrup,et al.  Movements and distribution of polar bears in the Beaufort Sea , 2000 .

[16]  Ø. Wiig,et al.  Seasonal and annual movements of radio-collared polar bears (Ursus maritimus) in northeast Greenland , 1997 .

[17]  F. Messier,et al.  Seasonal activity patterns of female polar bears (Ursus maritimus) in the Canadian Arctic as revealed by satellite telemetry , 1992 .

[18]  Gary C. White,et al.  Analysis of Wildlife Radio-Tracking Data , 1990 .

[19]  E. Hansen,et al.  Using satellite telemetry to define spatial population structure in polar bears in the Norwegian and western Russian Arctic , 2002 .

[20]  S. Amstrup,et al.  Polar bear maternity denning in the Beaufort Sea , 1994 .

[21]  R. Harris.  Tracking wildlife by satellite : current systems and performance / by Richard B. Harris ... [et al.]. , 2018 .

[22]  P. Wadhams,et al.  Sea-ice flux in the East Greenland Current , 1999 .

[23]  Ian Stirling,et al.  Habitat preferences of polar bears in the western Canadian Arctic in late winter and spring , 1993, Polar Record.

[24]  I. Stirling,et al.  Fidelity of Female Polar Bears to Winter-Den Sites , 1990 .

[25]  Claire Parkinson.  Variability of Arctic Sea Ice: The View from Space, An 18-year Record , 2000 .

[26]  R. E. Moritz.  The Ice Budget of the Greenland Sea. , 1988 .

[27]  F. Messier,et al.  Determinants of Home Range Size for Polar Bears (Ursus maritimus). , 1999, Ecology letters.

[28]  Andrew E. Derocher,et al.  Functional responses in polar bear habitat selection , 2003 .

[29]  K. Aagaard,et al.  On the velocity field of the East Greenland Current , 1988 .

[30]  S. Rysgaard,et al.  Physical Conditions, Carbon Transport, and Climate Change Impacts in a Northeast Greenland Fjord , 2003 .