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Prey and seasonal abundance of killer whales at sub-Antarctic Marion Island

被引：30
|
作者：
Reisinger, R. R. [1 ]
de Bruyn, P. J. N. [1 ]
Tosh, C. A. [1 ]
Oosthuizen, W. C. [1 ]
Mufanadzo, N. T. [1 ]
Bester, M. N. [1 ]
机构：
[1] Univ Pretoria, Mammal Res Inst, Dept Zool & Entomol, ZA-0028 Hatfield, South Africa
来源：
AFRICAN JOURNAL OF MARINE SCIENCE | 2011年 / 33卷 / 01期
关键词：
Orcinus orca; seals; diet; foraging; Southern Ocean; seasonal occurrence; SEALS ARCTOCEPHALUS-TROPICALIS; EASTERN NORTH PACIFIC; PRINCE-EDWARD ISLANDS; SOUTH-AFRICAN WATERS; ORCINUS-ORCA; FUR SEALS; BRITISH-COLUMBIA; FEEDING ECOLOGY; POPULATION; BEHAVIOR;
D O I：
10.2989/1814232X.2011.572356
中图分类号：
Q17 [水生生物学];
学科分类号：
071004 ;
摘要：
The diet of killer whales Orcinus orca was investigated from 48 predation events observed during 823 sightings at sub-Antarctic Marion Island between 2006 and 2009. From these events, there were 10 cases where prey could be identified. Killer whales fed on fur seals Arctocephalus tropicalis, elephant seals Mirounga leonina and penguins. Constant effort (dedicated) observations (259 hours, 2008-2009) showed that the peak in killer whale abundance was between September and December with a secondary peak between April and May, which coincided with peaks in the abundance of seals and penguins.
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收藏
页码：99 / 105
页数：7
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