THE DIET OF ANTARCTIC FUR SEALS DURING THE LATE AUTUMN AND EARLY WINTER AROUND HEARD ISLAND

被引：47

作者：

GREEN, K

WILLIAMS, R

BURTON, HR

机构：

[1] Antarctic Division, Kingston, Tasmania 7050, Channel Highway

来源：

ANTARCTIC SCIENCE | 1991年 / 3卷 / 04期

关键词：

ARCTOCEPHALUS-GAZELLA; CHAMPSOCEPHALUS; GYMNOSCOPELUS; ELECTRONA; SQUID; SUB-ANTARCTIC;

D O I：

10.1017/S0954102091000457

中图分类号：

X [环境科学、安全科学];

学科分类号：

08 ; 0830 ;

摘要：

The diet of Antarctic fur seals around Heard Island was investigated in May and June 1990. Fish predominated in samples, occurring in an average of 93.4% of droppings. Otoliths from pelagic fish (mainly myctophids) constituted over 96% of all otoliths. There was an increase in the occurrence of squid from 3.4% in summer 1987/88 to 49.3% in the present study. For the fish species Gymnoscopelus nicholsi (Gilbert), 10.3% of otoliths recovered from scats were considered suitable for measurement compared with 30.5% from scats at Heard Island in 1987/88; this greater level of erosion provides further evidence that the seals were foraging further afield. The study demonstrates a significant difference between summer 1987/88 and winter 1990.

引用

页码：359 / 361

页数：3

共 8 条

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