A winter sighting of killer whales (Orcinus orca ) in Antarctic sea ice

被引：0
|
作者：
P. C. Gill
Deborah Thiele
机构：
[1] Australocetus and Oceanic Research Foundation,
[2] 148 Copeland Rd East,undefined
[3] Beecroft N.S.W. 2119 Australia Fax: 616 25003 14,undefined
[4] Australocetus and Australian Nature Conservation Agency,undefined
[5] GPO Box 636,undefined
[6] Canberra City,undefined
[7] A.C.T. 2601 Australia,undefined
来源：
Polar Biology | 1997年 / 17卷
关键词：
Prey Species; Marine Mammal; Killer Whale; Potential Prey; Antarctic Water;
D O I：
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中图分类号：
学科分类号：
摘要：
 A group of killer whales was sighted in open leads well inside Antarctic sea ice during August 1995. This was the first winter sighting of killer whales in Antarctic waters since 1955, and contradicts the view that all killer whales migrate north prior to the winter. A small calf was observed, providing the first evidence of a cetacean species breeding in Antarctic waters. Several potential prey species were also present. The sighting highlights the importance of lead and polynya systems to marine mammals, which probably use them to disperse within the winter sea-ice zone.
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页码：401 / 404
页数：3
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