Diet composition of polar bears in Svalbard and the western Barents Sea

被引：126
|
作者：
Derocher, AE [1 ]
Wiig, O
Andersen, M
机构：
[1] Norwegian Polar Res Inst, N-9296 Tromso, Norway
[2] Univ Oslo, Zool Museum, N-0318 Oslo, Norway
来源：
POLAR BIOLOGY | 2002年 / 25卷 / 06期
关键词：
D O I：
10.1007/s00300-002-0364-0
中图分类号：
X176 [生物多样性保护];
学科分类号：
090705 ;
摘要：
We estimated both the numerical and biomass composition of the prey of polar bears (Ursus maritimus) from 135 opportunistic observations of kills in Svalbard and the western Barents Sea collected from March to October 1984-2001. By number, the prey composition was dominated by ringed seals (Phoca hispida) (63%), followed by bearded seals (Erignathus barbatus) (13%), harp seals (P. groenlandica) (8%) and unknown species (16%). However, when known prey were converted to biomass, the composition was dominated by bearded seals (55%), followed by ringed seals (30%) and harp seals (15%). Results indicated that bearded seals are an important dietary item for polar bears in the western Barents Sea. We believe that different patterns of space use by different bears may result in geographic variation of diet within the same population.
引用
收藏
页码：448 / 452
页数：5
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