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首页> 外文期刊>Marine ecology progress series >Feeding ecology and movements of the Barolo shearwater Puffinus baroli baroli in the Azores, NE Atlantic
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Feeding ecology and movements of the Barolo shearwater Puffinus baroli baroli in the Azores, NE Atlantic

机译：大西洋东北亚速尔群岛的Barolo剪水Puffinus baroli baroli的进食生态学和运动

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摘要

Trophic ecology and movements are critical issues for understanding the role of marine predators in food webs and for facing the challenges of their conservation. Seabird foraging ecology has been increasingly studied, but small elusive species, such as those forming the 'little shearwater' complex, remain poorly known. We present the first study on the movements and feeding ecology of the Barolo shearwater Puffinus baroli baroli in a colony from the Azores archipelago (NE Atlantic), combining global location-sensing units, stable isotope analyses of feathers (δ~(13)C and δ~(15)N), stomach flushings and data from maximum depth gauges. During the chick-rearing period, parents visited their nests most nights, foraged mainly south of the colony and fed at lower trophic levels than during the non-breeding period. Squid was the most diverse prey (6 families and at least 10 different taxa), but species composition varied considerably between years. Two squid families, Onychoteuthidae and Argonautidae, and the fish family Phycidae accounted for 82.3% of ingested prey by number. On average, maximum dive depths per foraging trip reached 14.8 m (range: 7.9 to 23.1 m). After the breeding period, birds dispersed offshore in all directions and up to 2500 km from the breeding colony, and fed at higher trophic levels. Overall, our results indicate that the Barolo shearwater is a non-migratory shearwater feeding at the lowest trophic level among Macaronesian seabirds, showing both diurnal and nocturnal activity and feeding deeper in the water column, principally on small schooling squid and fish. These traits contrast with those of 3 other Azorean Procellariiformes (Cory's shearwater Calonectris diomedea, the Madeiran storm-petrel Oceanodroma castro and Monteiro's storm-petrel O. monteiroi), indicating ecological segregation within the Azorean seabird community.
机译：营养生态和运动是关键问题，对于理解海洋捕食者在食物网中的作用以及面对其养护的挑战至关重要。越来越多地研究了海鸟觅食生态学，但是人们仍然很少知道诸如“小剪力水”复合物这样的小物种。我们结合全球位置传感单元，羽毛的稳定同位素分析（δ〜（13）C和C）进行了关于亚速尔群岛（东北大西洋）殖民地中Barolo剪切水Puffinus baroli baroli的运动和摄食生态学的首次研究。 δ〜（15）N），洗胃和最大深度计的数据。在雏鸡饲养期间，父母们整夜都在巢里觅食，主要在殖民地南部觅食，营养水平低于非繁殖期。乌贼是种类最多的猎物（6个科目，至少有10个不同的分类单元），但不同年份的物种组成差异很大。数量上，鱿鱼科（Onychoteuthidae和Argonautidae）和鱼类科（Phycidae）两个乌贼占食入猎物的82.3％。平均而言，每次觅食旅行的最大潜水深度达到14.8 m（范围：7.9至23.1 m）。繁殖期之后，鸟类从各个方向向海外扩散，距繁殖群最多2500公里，并以较高的营养水平觅食。总的来说，我们的结果表明，巴罗洛剪力水是一种非迁移性剪力水，在马卡罗尼海鸟中营养水平最低，表现出昼夜活动和夜间活动，并且在水柱中的取食深度更深，主要是在小型乌贼和鱼类上。这些特征与其他3种亚速尔群岛Procellariiformes（Cory的剪力水Calonectris diomedea，Madeiran风暴海燕Oceanodroma castro和Monteiro的风暴海燕O. monteiroi）形成鲜明对比，表明亚速尔海鸟群落内存在生态隔离。

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  • 来源
    《Marine ecology progress series》 |2012年第25期|p.269-285|共17页
  • 作者

    Veronica C. Neves; Joel Bried; Jacob Gonzalez-Solis; Jose L. Roscales; Malcolm R. Clarke;

  • 作者单位

    Departamento de Oceanografia e Pescas, Centro do IMAR da Universidade dos Agores, Rua Frederico Machado n°4,9901-862 Horta, Faial, Azores, Portugal;

    Departamento de Oceanografia e Pescas, Centro do IMAR da Universidade dos Agores, Rua Frederico Machado n°4,9901-862 Horta, Faial, Azores, Portugal;

    Institut de Recerca de la Biodiversitat (IRBio) and Departament de Biologia Animal, Universitat de Barcelona,Avenida Diagonal 645, 08028 Barcelona, Spain;

    Institut de Recerca de la Biodiversitat (IRBio) and Departament de Biologia Animal, Universitat de Barcelona,Avenida Diagonal 645, 08028 Barcelona, Spain Departamento de Analisis Instrumental y Quimica Ambiental, Instituto de Quimica Organica general (IQOG-CSIC),Calle Juan de la Cierva 3, 28006 Madrid, Spain;

    Rua do Porto 18, 9930-430 Lajes do Pico, Azores, Portugal;

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  • 正文语种 eng
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  • 关键词

    barolo shearwater; puffinus baroli baroli; diet; foraging behaviour; stable isotopes; activity patterns; at-sea distribution; north-eastern atlantic;

    机译：巴罗洛剪切水蓬松的baroli饮食;觅食行为;稳定同位素活动模式;海上分销;东北大西洋;

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