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首页> 外文期刊>Marine biology >Adult female whale sharks make long-distance movements past Darwin Island (Galapagos, Ecuador) in the Eastern Tropical Pacific
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Adult female whale sharks make long-distance movements past Darwin Island (Galapagos, Ecuador) in the Eastern Tropical Pacific

机译：成年雌性鲸鲨在热带东部太平洋经过达尔文岛（厄瓜多尔加拉帕戈斯）后进行长距离运动

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摘要

Most previous studies on whale shark movements have been on immature sharks. Here, we present tracking data for large females that we tagged at the Galapagos Islands, where they occur seasonally. We conducted fieldwork at Darwin Island (1.67, 92.0 degrees W) from July to October in 2011 and in 2012. We often saw individual sharks several times on a particular day, but rarely saw them again more than 2 days later after they were first sighted. We tagged 39 female whale sharks, 36 of which were between 8 and 12 m long. We tracked 27 sharks for 9-176 days (median = 47 day). Sharks tagged in July moved west into the open ocean, whereas those tagged in September and October moved toward the coast of South America. They travelled between 49 and 2747 km from Darwin (median = 1296 km), at about 38 km day(-1) (median rate). We observed five of those sharks later at various times at Darwin Island after >1 month absence, by photo-identification (n = 2) or satellite track (n = 3). Tracks that lasted through December ended along the continental shelf break of northern Peru. We show return movements of individuals through Darwin after moving large distances into the open ocean and establish connectivity with mainland Ecuador and Peru.
机译：以前有关鲸鲨运动的大多数研究都是针对未成熟的鲨鱼。在这里，我们提供了在加拉帕戈斯群岛标记的大型雌性的追踪数据，这些季节在季节性发生。我们分别于2011年7月至10月和2012年在达尔文岛（1.67，西风92.0度）进行了实地考察。我们经常在特定的一天见过几次鲨鱼，但很少在第一次见到鲨鱼后两天又见过。我们标记了39条母鲸鲨，其中36条长在8至12 m之间。我们跟踪了9至176天（中位数= 47天）的27条鲨鱼。 7月份标记的鲨鱼向西移入大洋，而9月和10月标记的鲨鱼则移向南美海岸。他们从达尔文（中位数= 1296公里）行驶了49至2747公里，约合每天38公里（-1）（中位数）。在缺席超过1个月后，我们通过照片识别（n = 2）或卫星轨道（n = 3）在达尔文岛的不同时间观察了其中5条鲨鱼。持续到十二月的铁轨在秘鲁北部的大陆架断裂处结束。我们向您展示了远距离进入公海后通过达尔文的个人返回运动，并建立了与厄瓜多尔大陆和秘鲁的联系。

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  • 来源
    《Marine biology》 |2016年第10期|214.1-214.12|共12页
  • 作者

    Hearn Alex R.; Green J.; Roman M. H.; Acuna-Marrero D.; Espinoza E.; Klimley A. P.;

  • 作者单位

    Univ San Francisco Quito USFQ, Quito, Ecuador|Turtle Isl Restorat Network, Olema, CA USA|Univ Calif Davis, Davis, CA 95616 USA;

    Marine Megafauna Fdn Ecuador, Quito, Ecuador;

    Interamer Trop Tuna Commiss, La Jolla, CA USA;

    Charles Darwin Fdn, Puerto Ayora, Galapagos Islan, Ecuador;

    Galapagos Natl Pk Directorate, Puerto Ayora, Galapagos Islan, Ecuador;

    Univ Calif Davis, Davis, CA 95616 USA;

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