FORAGING ECOLOGY OF SOUTHERN ELEPHANT SEALS IN RELATION TO THE BATHYMETRY AND PRODUCTIVITY OF THE SOUTHERN-OCEAN

被引：406

作者：

MCCONNELL, BJ

CHAMBERS, C

FEDAK, MA

机构：

[1] Sea Mammal Research Unit, Natural Environment Research Council, Cambridge CB3 OET, High Cross Mading Road

来源：

ANTARCTIC SCIENCE | 1992年 / 4卷 / 04期

关键词：

SOUTHERN ELEPHANT SEAL; MIROUNGA; ANTARCTICA; FORAGING; DIVE PHYSIOLOGY;

D O I：

10.1017/S0954102092000580

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

Southern elephant seals (Mirounga leonina) are among the most proficient of mammalian divers and are a major component of the Antarctic food web. Yet little is known of their movements or interaction with their oceanic environment. Specially designed satellite-link data loggers allowed us to visualize the 3-D movements of elephant seals as they swam rapidly from South Georgia to distant (up to 2650 km) areas of Antarctic continental shelf. One seal dived continuously to the sea bed in one small area for a month, implying consumption of benthic prey. Dives here were shorter even though average swimming velocity was lower. It is suggested that the physiological requirements of feeding and digestion reduced the aerobic dive limit. Long distance travel to relocatable hydrographic or topographical features, such as shelf breaks, may allow large predators to locate rev more consistently than from mid-ocean searches.

引用

页码：393 / 398

页数：6

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