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首页> 外文期刊>Marine biology >Effects of age, sex, colony and breeding phase on marine space use by Great Shearwaters Ardenna gravis in the South Atlantic
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Effects of age, sex, colony and breeding phase on marine space use by Great Shearwaters Ardenna gravis in the South Atlantic

机译：年龄，性别，殖民地和繁殖阶段对南大西洋大希特沃特斯重子对海洋空间利用的影响

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摘要

Shearwaters are among the most abundant seabirds globally and breeding birds often travel thousands of kilometres during foraging trips to productive marine areas. Great Shearwaters Ardenna gravis are endemic breeders of the Tristan da Cunha Archipelago with a population of 5-6 million breeding pairs making them key top predators within the South Atlantic Ocean. We deployed satellite transmitters on 42 breeding and non-breeding shearwaters at two nesting islands and one foraging site in the northern hemisphere to quantify their movements and space use with respect to age, sex, colonies and breeding phases. During the pre-laying period, birds from Gough Island made trips of 2400 km to the Benguela upwelling region off South Africa, or 4000 km to the Patagonian Shelf; patterns which overlapped with immature birds from the Bay of Fundy, Canada. During the incubation period, males and females from Inaccessible Island showed differences in trip durations, but no difference in foraging ranges: both sexes made trips of 1500-2000 km to the Sub-Antarctic Front or 4000 km to the Patagonian Shelf, among the furthest foraging trips of breeding seabirds observed to date. Although the colonies are separated by only 400 km, during the incubation period, the at-sea distribution of non-breeding birds from Gough Island was spatially segregated from breeding and failed birds from Inaccessible Island, whereas immature birds from Fundy overlapped with birds from both colonies. During the post-breeding period, all tagged populations overlapped on the Patagonian Shelf. Argentina's Exclusive Economic Zone was used extensively during pre-laying, incubation, and post-breeding periods, highlighting the global importance of the Patagonian Shelf for this species.
机译：剪切水是全球最丰富的海鸟之一，繁殖鸟类在觅食生产性海洋地区的过程中经常走数千公里。 Great Shearwaters Ardenna gravis是Tristan da Cunha群岛的特有繁殖者，种群数量为5-6百万，这使它们成为南大西洋的主要顶级捕食者。我们在北半球的两个筑巢岛和一个觅食地点的42个繁殖和非繁殖剪水中配置了卫星发射器，以量化它们在年龄，性别，殖民地和繁殖阶段方面的运动和空间利用情况。在预产期，来自高夫岛的鸟类到南非附近的本格拉上升流域旅行了2400公里，或者到巴塔哥尼亚大陆架旅行了4000公里以上；与加拿大芬迪湾的未成熟鸟类重叠的图案。在潜伏期，无法进入的岛屿的雄性和雌性表现出旅行持续时间的差异，但觅食范围却没有差异：两性都到南极亚前线旅行了1500-2000 km，或者到了巴塔哥尼亚大陆架旅行了4000 km，是最远的。迄今为止观察到的繁殖海鸟觅食之旅。尽管殖民地仅相隔400公里，但在潜伏期，高夫岛的非繁殖鸟类在海上的分布与无法进入的岛屿的繁殖和失败的鸟类在空间上是分离的，而芬迪的未成熟鸟类与这两种鸟类的重叠群落。在繁殖后期间，所有标记种群在巴塔哥尼亚架子上重叠。阿根廷的专属经济区在产蛋前，孵化和繁殖后期间被广泛使用，突出了巴塔哥尼亚大陆架对该物种的全球重要性。

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  • 来源
    《Marine biology》 |2018年第3期|58.1-58.13|共13页
  • 作者

    Ronconi Robert A.; Schoombie Stefan; Westgate Andrew J.; Wong Sarah N. P.; Koopman Heather N.; Ryan Peter G.;

  • 作者单位

    Grand Manan Whale & Seabird Res Stn, 24 Rte 776, Grand Manan, NB, Canada;

    Univ Cape Town, FitzPatrick Inst African Ornithol, ZA-7701 Rondebosch, South Africa;

    Grand Manan Whale & Seabird Res Stn, 24 Rte 776, Grand Manan, NB, Canada;

    Grand Manan Whale & Seabird Res Stn, 24 Rte 776, Grand Manan, NB, Canada;

    Grand Manan Whale & Seabird Res Stn, 24 Rte 776, Grand Manan, NB, Canada;

    Univ Cape Town, FitzPatrick Inst African Ornithol, ZA-7701 Rondebosch, South Africa;

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