...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine biology >Central place foraging by breeding Cook's petrel Pterodroma cookii: foraging duration reflects range, diet and chick meal mass
【24h】

Central place foraging by breeding Cook's petrel Pterodroma cookii: foraging duration reflects range, diet and chick meal mass

机译：繁殖库克海燕Pterodroma cookii的主要觅食场所：觅食持续时间反映了范围，饮食和雏鸡的体重

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

Pelagic seabirds are central place foragers during breeding and variation in foraging trip duration and range reflect differences in diet and chick provisioning, through the exploitation of divergent habitats of varying productivity. We tested whether these relationships hold in small procellarriids by equipping chick-rearing Cook's petrel Pterodroma cookii (200 g) with geolocation-immer-sion loggers, conducting isotope analysis of blood and measuring chick meal mass following foraging trips of varying duration. Cook's petrel tracked during chick rearing from Little Barrier Island (LBI) and Codfish Island (CDF), New Zealand had larger maximum ranges during longer foraging trips. Blood nitrogen isotope signatures (δ~(15)N) of adults were significantly higher after foraging trips of longer duration, but not of greater maximum range. There was no significant relationship between blood carbon isotope signatures (δ~(13)C) and foraging trip characteristics. Proportion of time spent on the sea surface and the mass of the meal brought back to chicks were consistently greater for Cook's petrel with larger maximum ranges, which in the case of birds from CDF coincided with productive subtropical convergence zone habitats. As predicted, trip duration reflected divergent foraging behaviours in Cook's petrel during breeding. We suggest that the availability of different prey is a key factor governing at-sea distributions and dietary composition of this species.
机译：远洋海鸟是繁殖过程中的中心觅食者，其觅食行程持续时间各不相同，并且通过利用生产力不同的不同栖息地，反映出饮食和雏鸡供应的差异。我们通过在地理位置不同的浸没式记录仪上为库克小鸡的海燕Pterodroma cookii（200 g）配备装备，对血液进行同位素分析并在不同持续时间的觅食旅行后测量鸡粉质量，来测试这些关系是否在小型水母中成立。在从新西兰小屏障岛（LBI）和鳕鱼岛（CDF）进行雏鸡饲养时追踪到的库克海燕在较长的觅食行程中具有较大的最大射程。成年觅食行程较长，但最大射程不大时，成年人的血氮同位素特征（δ〜（15）N）显着较高。血液碳同位素特征（δ〜（13）C）与觅食旅行特征之间无显着关系。对于库克海燕来说，在海面上度过的时间比例和带回雏鸡的食物质量始终具有更大的最大范围，对于CDF的鸟类来说，这恰好与生产性亚热带收敛带栖息地相吻合。如预测的那样，旅行持续时间反映了库克海燕繁殖期间的不同觅食行为。我们建议，不同猎物的可用性是控制该物种在海上的分布和饮食组成的关键因素。

著录项

  • 来源
    《Marine biology》 |2010年第10期|p.2187-2194|共8页
  • 作者

    M. J. Rayner; B. W. Hartill; M. E. Hauber; R. A. Phillips;

  • 作者单位

    National Institute of Water & Atmospheric Research Ltd,Private Bag 99940, Auckland, New Zealand;

    National Institute of Water & Atmospheric Research Ltd,Private Bag 99940, Auckland, New Zealand;

    Department of Psychology, Hunter College of the City University of New York, 695 Park Avenue, New York, NY 10065, USA;

    British Antarctic Survey, Natural Environment Research Council,High Cross, Madingley Road, Cambridge CB3 0ET, UK;

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

相似文献

  • 外文文献
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