...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Marine biology >Diet composition and foraging habitats of Adelie and gentoo penguins in three different stages of their annual cycle
【24h】

Diet composition and foraging habitats of Adelie and gentoo penguins in three different stages of their annual cycle

机译：阿德利（Adelie）和金企鹅（Gentoo）企鹅在其年度周期的三个不同阶段的饮食组成和觅食栖息地

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 evaluated the diet of Adelie (Pygoscelis adeliae) and gentoo (P. papua) penguins at Stranger Point colony (25 de Mayo/King George Island) during different stages of their annual cycle using the stable isotope method and the conventional dietary analyses (i. e. stomach contents). Antarctic krill (Euphausia superba) dominated the diet of Adelie and gentoo penguins in all three studied stages (pre-breeding, breeding and post-breeding). Nevertheless, only in gentoo penguins a shift in the diet was evident from mainly krill during the breeding stage to mixed diet (i.e. krill and fish/squids) during the pre-and post-breeding stages. Results from stable isotopes suggest that Adelie penguins might be foraging in southern localities compared to their congener during the inter-breeding period. Moreover, Adelie penguins showed a large individual variability in foraging habitat during the post-breeding stage. However, our model has predicted that both species exploited similar areas during the breeding season. The results obtained during the chick-rearing stage were compared with the stomach contents of both species obtained during the same season (2011/2012). Our findings provide new knowledge on the feeding ecology and foraging habitats of pygoscelid penguins. They confirm the importance of Antarctic krill during the annual cycle and improve the understanding of life strategies and predator-prey interactions essentially out of the reproductive period, in which the information is very limited. These results can help to establish new management strategies, particularly considering the potential overlap between predators and fisheries.
机译：我们使用稳定同位素方法和常规饮食分析（即即食性）评估了他们的年周期不同阶段在陌生点殖民地（25 de Mayo /乔治国王岛）的阿德利企鹅（Pygoscelis adeliae）和金企鹅（P. papua）的饮食。胃内容物）。在所有三个研究阶段（繁殖前，繁殖和繁殖后）中，南极磷虾（Euphausia superba）主导着阿德利和金头企鹅的饮食。然而，仅在金戈企鹅中，在繁殖前和繁殖后的饮食中明显从主要磷虾向混合饮食（即磷虾和鱼/鱿鱼）转变。稳定同位素的结果表明，与它们的同类动物相比，阿德利企鹅可能在南部地区觅食。此外，在繁殖后阶段，阿德利企鹅的觅食栖息地表现出很大的个体差异。但是，我们的模型已经预测，两个物种在繁殖季节都利用相似的区域。将在雏鸡饲养阶段获得的结果与同一季节（2011/2012年）获得的两种物种的胃内容物进行了比较。我们的发现为pygoscelid企鹅的觅食生态和觅食栖息地提供了新的知识。他们确认了南极磷虾在年度周期中的重要性，并从本质上讲在信息十分有限的繁殖期之外，提高了对生活策略和捕食者与猎物之间相互作用的理解。这些结果可以帮助建立新的管理策略，尤其是考虑到捕食者和渔业之间可能存在的重叠。

著录项

  • 来源
    《Marine biology》 |2016年第5期|105.1-105.10|共10页
  • 作者

    Juares Mariana A.; Santos Mercedes; Mennucci Jorge A.; Coria Nestor R.; Mariano-Jelicich Rocio;

  • 作者单位

    Inst Antartico Argentino, Dept Biol Predadores Tope, Balcarce 290,C1064AAF, Buenos Aires, DF, Argentina;

    Inst Antartico Argentino, Dept Biol Predadores Tope, Balcarce 290,C1064AAF, Buenos Aires, DF, Argentina;

    Inst Antartico Argentino, Dept Biol Predadores Tope, Balcarce 290,C1064AAF, Buenos Aires, DF, Argentina;

    Inst Antartico Argentino, Dept Biol Predadores Tope, Balcarce 290,C1064AAF, Buenos Aires, DF, Argentina;

    Univ Nacl Mar del Plata, CONICET, Inst Invest Marinas & Costeras IIMyC, Lab Vertebrados, Funes 3250,B7602AYJ, Mar Del Plata, Buenos Aires, Argentina;

  • 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
  • 专利
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