• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Polar biology >Observations of a distinctive morphotype of killer whale (Orcinus orca), type D, from subantarctic waters
【24h】

Observations of a distinctive morphotype of killer whale (Orcinus orca), type D, from subantarctic waters

机译：来自南极水域的D型虎鲸（Orcinus orca）独特形态的观察

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

Studies have shown that killer whale (Orcinus orca) communities in high latitudes regularly comprise assemblages of sympatric 'ecotypes'-forms that differ in morphology, behavior, and prey preferences. Although they can appear superficially similar, recent genetic evidence suggests that breeding is assortative among ecotypes within individual communities, and species-level divergences are inferred in some cases. Here, we provide information on a recently recognized 'type D' killer whale based on photographs of a 1955 mass stranding in New Zealand and our own six at-sea sightings since 2004. It is the most distinctive-looking form of killer whale that we know of, immediately recognizable by its extremely small white eye patch. Its geographic range appears to be circumglobal in subantarctic waters between latitudes 40°S and 60°S. School sizes are relatively large (mean 17.6; range 9-35; n = 7), and although nothing is known about the type D diet, it is suspected to include fish because groups have been photographed around longline vessels where they reportedly depredate Patagonian toothfish (Dissostichus eleginoides).
机译：研究表明，高纬度的虎鲸（Orcinus orca）群落通常包括形态，行为和猎物偏好不同的同伴“生态型”形式的组合。尽管它们可能看起来很相似，但最近的遗传证据表明，繁殖在单个社区内的生态类型之间是不同的，并且在某些情况下可以推断出物种水平的差异。在此，我们根据1955年在新西兰发生的大规模搁浅的照片以及自2004年以来我们在海洋中的六次目击事件的照片，提供最近被认可的“ D型”虎鲸的信息。这是我们发现的最具特色的虎鲸形式众所周知，其极小的白眼斑可立即识别。它的地理范围在南纬40°S和60°S之间的南极水域似乎是全球性的。学校规模相对较大（平均17.6；范围9-35； n = 7），尽管对D型饮食一无所知，但据怀疑其中包括鱼类，因为有人在延绳钓渔船周围拍摄了成群的鱼，据报导它们会淘汰巴塔哥尼亚牙鱼（Dissostichus eleginoides）。

著录项

  • 来源
    《Polar biology》 |2011年第2期|p.303-306|共4页
  • 作者

    Robert L. Pitman; John W. Durban; Michael Greenfelder; Christophe Guinet; Morton Jorgensen; Paula A. Olson; Jordi Plana; Paul Tixier; Jared R. Towers;

  • 作者单位

    Protected Resources Division, Southwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, 8604 La Jolla Shores Drive, La Jolla, CA 92037, USA;

    rnProtected Resources Division, Southwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, 8604 La Jolla Shores Drive, La Jolla, CA 92037, USA;

    rn14940 Elton St. SW, Navarre, OH 44662, USA;

    rnCEBC-CNRS, Villiers-en-Bois, 79360 Beauvoir-sur-Niort, France;

    rnBroagergade 1, 3.th, 1672 K0benhavn V, Denmark;

    rnProtected Resources Division, Southwest Fisheries Science Center, National Marine Fisheries Service, National Oceanic and Atmospheric Administration, 8604 La Jolla Shores Drive, La Jolla, CA 92037, USA;

    rnQuaternary Research Center (CEQUA), Avenida Bulnes 01890, Casilla 737, Punta Arenas, Chile;

    rnCEBC-CNRS, Villiers-en-Bois, 79360 Beauvoir-sur-Niort, France;

    rnMarine Education and Research Society, Box 554, Alert Bay, BC VON 1A0, Canada;

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

    killer whale; orcinus orca; subantarctic; type D;

    机译：逆戟鲸;虎鲸亚南极的D型;

相似文献

  • 外文文献
  • 中文文献
  • 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