Dispersal of southern elephant seals (Mirounga leonina L.) marked at Macquarie Island

被引:15
|
作者
van den Hoff, J [1 ]
机构
[1] Australian Antarctic Div, Kingston, Tas 7050, Australia
关键词
D O I
10.1071/WR00065
中图分类号
Q14 [生态学(生物生态学)];
学科分类号
071012 ; 0713 ;
摘要
Southern elephant seals marked at Macquarie Island disperse to distant locations where they are sometimes seen during their moult and, for juveniles, a mid-year haul-out period (July-August). Most (87%) of these resighted seals were within 1000 km of Macquarie Island, and most commonly at Campbell Island (700 km to the north-east). The sex and age classes most likely to disperse there were males less than two years old. Male elephant seals of all ages were resighted significantly more often than females, the ratio being 2 : 1 (P > 0.05). Migration duration tended to increase with the seals' age but migration distance was underestimated from resight observations when compared with known telemetry records. Emigration from the Macquarie Island population appears limited. From the resight effort at Campbell Island during 1995 the maximum proportion of the juvenile population from Macquarie Island to haul-out at Campbell Island was in the order of 0.0053.
引用
收藏
页码:413 / 418
页数:6
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