Cephalopod diet of the southern elephant seal, Mirounga leonina, at King George Island, South Shetland Islands
Cephalopod diet of the southern elephant seal, Mirounga leonina, at King George Island, South Shetland Islands
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DOI：
10.1017/s0954102000000031
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发表时间：
2000-03-01
影响因子：
1.6
通讯作者：
Rodhouse, PGK
中科院分区：
文献类型：
--
作者：
Daneri, GA;Carlini, AR;Rodhouse, PGK
1995/96年夏天，在南设得兰群岛国王乔治岛的陌生人点，对25只南象海豹Mirounga leonina进行了洗胃。在72%的采样个体（n = 18）中发现了食蟹猴豆荚遗骸。发现了7种鱿鱼和3种章鱼。鱿鱼Psychroteuthis glacialis是最重要的猎物的数量（77%），生物量（80.8%）和频率（94.4%）。其次在质量方面的重要性是鱿鱼Alluroteuthis anarcticus（7.8%）的饮食中的女性和octopodid Pareledane？charcoti在男性的饮食（13.2%），女性比男性（7比3）更广泛的鱿鱼类群捕食，但章鱼只出现在胃内容物从男性。在南设得兰群岛象海豹的猎物中，冰川海豹的优势可以通过与南格鲁吉亚、赫德和麦夸里群岛相比，该种群觅食区的偏南位置来解释，此前曾对南象海豹的饮食进行过分析。冰川冷鱿鱼是南极大陆附近沃茨水域的主要鱿鱼。
In the summer of 1995/96, 25 southern elephant seals, Mirounga leonina, were stomach lavaged at Stranger Point, King George Island, South Shetland Islands. Cephalopod remains were present in 72% of the individuals sampled (n = 18). Seven species of squid and three of octopus were identified. The squid Psychroteuthis glacialis was the most important prey in terms of numbers (77%), biomass (80.8%) and frequency of occurrence (94.4%). Next in importance in terms of mass was the squid Alluroteuthis antarcticus (7.8%) in the diet of females and the octopodid Pareledane ?charcoti in the diet of males (13.2%), Females preyed on a wider variety of squid taxa than males (7 vs 3) but octopodids occurred only in stomach contents from males. The predominance of P. glacialis in the prey of the South Shetland Islands elephant seals can be explained by the southerly location of the foraging areas of this population compared to South Georgia, Heard and Macquarie islands, where the diet of southern elephant seals has previously been analysed. Psychroteuthis glacialis is the predominant squid in waters close to the Antarctic continent.