• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Polar biology >Intra-seasonal variation in foraging behavior among Adelie penguins (Pygocelis adeliae) breeding at Cape Hallett, Ross Sea, Antarctica
【24h】

Intra-seasonal variation in foraging behavior among Adelie penguins (Pygocelis adeliae) breeding at Cape Hallett, Ross Sea, Antarctica

机译：在南极罗斯海角哈雷特角的阿德利企鹅（Pygocelis adeliae）觅食行为的季节内变化

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

We investigated intra-seasonal variation in foraging behavior of chick-rearing Adelie penguins, Pygoscelis adeliae, during two consecutive summers at Cape Hallett, northwestern Ross Sea. Although foraging behavior of this species has been extensively studied throughout the broad continental shelf region of the Ross Sea, this is the first study to report foraging behaviors and habitat affiliations among birds occupying continental slope waters. Continental slope habitat supports the greatest abundances of this species throughout its range, but we lack information about how intra-specific competition for prey might affect foraging and at-sea distribution and how these attributes compare with previous Ross Sea studies. Foraging trips increased in both distance and duration as breeding advanced from guard to creche stage, but foraging dive depth, dive rates, and vertical dive distances travelled per hour decreased. Consistent with previous studies within slope habitats elsewhere in Antarctic waters, Antarctic krill (Euphausia superba) dominated chick meal composition, but fish increased four-fold from guard to creche stages. Foraging-, focal-, and core areas all doubled during the creche stage as individuals shifted distribution in a southeasterly direction away from the coast while simultaneously becoming more widely dispersed (i.e., less spatial overlap among individuals). Intra-specific competition for prey among Adelie penguins appears to influence foraging behavior of this species, even in food webs dominated by Antarctic krill.
机译：我们调查了连续两个夏天在西北罗斯海的哈雷特角，饲养小鸡的阿德利企鹅（Pygoscelis adeliae）的觅食行为的季节内变化。尽管已经在罗斯海的整个大陆架区域对该物种的觅食行为进行了广泛的研究，但这是第一个报告在占领大陆斜坡水域的鸟类中觅食行为和栖息地隶属关系的研究。大陆坡生境在其整个范围内都支持该物种的最大丰度，但我们缺乏关于种内对猎物的竞争如何影响觅食和海上分布以及这些属性与以前的Ross Sea研究相比如何的信息。随着从守卫到托儿所阶段的繁殖，觅食旅行的距离和持续时间都有所增加，但是每小时的觅食潜水深度，潜水速率和垂直潜水距离却减少了。与先前在南极水域其他地方的斜坡栖息地中进行的研究一致，南极磷虾（Euphausia superba）主导着雏鸡粉的组成，但从保卫阶段到托儿所阶段，鱼类增加了四倍。在育婴期，觅食，焦点和核心区域都增加了一倍，因为个体向东南方方向转移分布，远离海岸，同时变得更加分散（即个体之间的空间重叠较少）。甚至在以南极磷虾为主导的食物网中，阿德利企鹅之间对猎物的种内竞争似乎也会影响该物种的觅食行为。

著录项

  • 来源
    《Polar biology》 |2011年第1期|p.49-67|共19页
  • 作者

    P. OB. Lyver; C. J. MacLeod; G. Ballard; B. J. Karl; K. J. Barton; J. Adams; D. G. Ainley; P. R. Wilson;

  • 作者单位

    Landcare Research, P.O. Box 40, Lincoln 7640, New Zealand;

    Landcare Research, Private Bag 1930, Dunedin 9054, New Zealand;

    PRBO Conservation Science, Petaluma, CA 94954, USA,Ecology, Evolution, and Behaviour, School of Biological Sciences, University of Auckland, Auckland, New Zealand;

    Landcare Research, P.O. Box 40, Lincoln 7640, New Zealand;

    Landcare Research, Nelson Mail Centre, Private Bag 6, Nelson 7042, New Zealand;

    Western Ecological Research Center, US Geological Survey, Pacific Science Center, 400 Natural Bridges Drive, Santa Cruz, CA 95060, USA;

    H.T Harvey and Associates, 983 University Avenue, Building D, Los Gatos, CA 95032, USA;

    17 Modena Crescent, St Heliers, Auckland, New Zealand;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    adelie penguin; foraging; intra-seasonal competition; pack ice; antarctic krill; antarctic silverfish;

    机译：阿德利企鹅觅食;季节内竞争;装冰南极磷虾南极银鱼;

相似文献

  • 外文文献
  • 中文文献
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号