Aggregation patterns of pelagic predators and their principal prey, Antarctic krill, near South Georgia
Aggregation patterns of pelagic predators and their principal prey, Antarctic krill, near South Georgia
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南乔治亚岛附近的中上层捕食者及其主要猎物南极磷虾的聚集模式
DOI：
10.2307/5204
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发表时间：
1993
影响因子：
4.8
通讯作者：
I. Everson
中科院分区：
文献类型：
--
作者：
R. Veit;E. Silverman;I. Everson
我们研究了南乔治亚岛附近的远洋海鸟和海狗的空间分布，并询问这些捕食者的分布在多大程度上受到其主要猎物南极磷虾南极磷虾的空间分布的影响。我们分析的一个新颖之处是明确考虑了磷虾群和以磷虾为食的捕食者聚集体之间的空间分离。我们的数据是 1986 年 2 月在对南乔治亚州伯德岛周围水域进行系统船上调查时收集的。使用带状横断面目视估计捕食者丰度，并使用安装在船体上的回声测深仪同时估计磷虾丰度
We examined the spatial distributions of pelagic seabirds and fur seals near South Georgia, and asked to what extent the distributions of these predators were influenced by the spatial distribution of their principal prey, Antarctic krill Euphausia superba Dana. One novel aspect of our analysis is an explicit consideration of the separation in space between swarms of krill and aggregations of predators that feed upon krill. Our data were collected in February 1986, during a systematic shipboard survey of the waters surrounding Bird Island, South Georgia. Predator abundance was estimated visually using strip transects, and krill abundance was simultaneously estimated using a hull-mounted echosounder