Current-use pesticides in seawater and their bioaccumulation in polar bear-ringed seal food chains of the Canadian Arctic

2016 ◽  
Vol 35 (7) ◽  
pp. 1695-1707 ◽  
Author(s):  
Adam D. Morris ◽  
Derek C.G. Muir ◽  
Keith R. Solomon ◽  
Robert J. Letcher ◽  
Melissa A. McKinney ◽  
...  
Keyword(s):  
Polar Bear ◽  
Canadian Arctic ◽  
Ringed Seal ◽  
Food Chains

Presence and Distribution of Polychlorinated Biphenyls (PCB) in Arctic and Subarctic Marine Food Chains

1975 ◽  
Vol 32 (11) ◽  
pp. 2111-2123 ◽  
Author(s):  
Gerald W. Bowes ◽  
Charles J. Jonkel
Keyword(s):  
Polychlorinated Biphenyls ◽  
Polar Bear ◽  
Salvelinus Alpinus ◽  
Canadian Arctic ◽  
Food Chains ◽  
Polar Bears ◽  
Industrial Chemicals ◽  
Food Residue ◽  
Marine Food ◽  
High Concentrations

Polychlorinated biphenyls (PCB), man-made industrial chemicals, have been identified in tissues of polar bears (Ursus maritimus), ringed (Phoca hispida) and square flipper (Erignathus barbatus) seals, and Arctic char (Salvelinus alpinus) of the Canadian arctic and subarctic. All tissues from each species examined contained these compounds. PCB content in tissue, both absolute and relative to the concentration of DDT (p,p′-DDE + p,p′-DDD + p,p′-DDT), generally increased from seals to adult polar bears to polar bear cubs and young. Polar bear milk contained high concentrations of PCB and is the most probable source of the high concentrations in polar bear cubs. Chromatograms revealed a greater accumulation of higher chlorinated PCB isomers in polar bears than in seals, their main food. Residue data suggest that polar bear subpopulations in the eastern Canadian arctic and subarctic have been exposed to higher levels of PCB and DDT than western subpopulations.

Polar bear predatory behaviour reveals seascape distribution of ringed seal lairs

2013 ◽  
Vol 56 (1) ◽  
pp. 129-138 ◽  
Author(s):  
Nicholas W. Pilfold ◽  
Andrew E. Derocher ◽  
Ian Stirling ◽  
Evan Richardson
Keyword(s):  
Polar Bear ◽  
Ringed Seal ◽  
Predatory Behaviour

scholarly journals Polar bear denning distribution in the Canadian Arctic

Polar Biology ◽  
2020 ◽  
Vol 43 (5) ◽  
pp. 617-621
Author(s):  
Katie R. N. Florko ◽  
Andrew E. Derocher ◽  
C-Jae C. Breiter ◽  
Maha Ghazal ◽  
Daryll Hedman ◽  
...  
Keyword(s):  
Polar Bear ◽  
Canadian Arctic

Western Canadian Arctic Ringed Seal Organic Contaminant Trends in Relation to Sea Ice Break-Up

2012 ◽  
Vol 46 (8) ◽  
pp. 4427-4433 ◽  
Author(s):  
A. Gaden ◽  
Steve H. Ferguson ◽  
L. Harwood ◽  
H. Melling ◽  
J. Alikamik ◽  
...  
Keyword(s):  
Sea Ice ◽  
Canadian Arctic ◽  
Ringed Seal ◽  
Organic Contaminant ◽  
Break Up

The caloric value of whole ringed seals (Phoca hispida) in relation to polar bear (Ursus maritimus) ecology and hunting behavior

1975 ◽  
Vol 53 (8) ◽  
pp. 1021-1027 ◽  
Author(s):  
Ian Stirling ◽  
Eoin H. McEwan
Keyword(s):  
Total Body Water ◽  
Polar Bear ◽  
Fat Body ◽  
Ursus Maritimus ◽  
Ringed Seal ◽  
Body Water ◽  
Phoca Hispida ◽  
Hunting Behavior ◽  
Wet Weight ◽  
Total Body

Throughout its circumpolar range, the polar bear (Ursus maritimus) feeds predominantly on the ringed seal (Phoca hispida). Despite seasonal variation in availability and distribution of seals, polar bears prefer to eat mainly the fat, often leaving substantial portions of seal meat and blubber. In the present study, 12 seals were minced and analyzed for water, fat, protein, and ash contents. The percentage composition varied from 23 to 58% protein, 34 to 76% fat, 2 to 5.5% ash, and 47.4 to 69.5% total body water. The caloric values varied from 2.3 to 5.3 kcal/g wet weight. Relationships between total body water and fat (%), body water (litres) and protein (kg) are presented. These results are discussed in relation to the ecology and hunting behavior of the polar bear.

Mammals of central North Greenland

Polar Record ◽  
1989 ◽  
Vol 25 (152) ◽  
pp. 43-49 ◽  
Author(s):  
O. Bennike ◽  
A. K. Higgins ◽  
M. Kelly
Keyword(s):  
Arctic Ocean ◽  
Polar Bear ◽  
Ringed Seal ◽  
The Arctic ◽  
Arctic Fox ◽  
Bearded Seal ◽  
The Arctic Ocean ◽  
Arctic Hare ◽  
Musk Ox ◽  
North Greenland

AbstractCentral North Greenland, an uninhabited and rarely visited region bordering the Arctic Ocean, supports arctic hare, collared lemming, wolf, arctic fox, polar bear, stoat, ringed seal and musk ox. Their distribution and abundance were noted during Geological Survey of Greenland expeditions in 1984–85, which visited virtually all land areas in the region, including nunataks and islands. Bones of reindeer, bearded seal and narwhal were also found. Ringed seal and reindeer are known to have been present in the region by the early Holocene.

Comparative hepatic in vitro depletion and metabolite formation of major perfluorooctane sulfonate precursors in arctic polar bear, beluga whale, and ringed seal

Chemosphere ◽  
2014 ◽  
Vol 112 ◽  
pp. 225-231 ◽  
Author(s):  
Robert J. Letcher ◽  
Shaogang Chu ◽  
Melissa A. McKinney ◽  
Gregg T. Tomy ◽  
Christian Sonne ◽  
...  
Keyword(s):  
Polar Bear ◽  
Perfluorooctane Sulfonate ◽  
Ringed Seal ◽  
Beluga Whale ◽  
Metabolite Formation
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