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首页> 外文期刊>Marine Ornithology >Krill-feeding behaviour in a Chinstrap Penguin Pygoscelis antarcticacompared with fish-eating in Magellanic Penguins Spheniscusmagellanicus: A pilot study
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Krill-feeding behaviour in a Chinstrap Penguin Pygoscelis antarcticacompared with fish-eating in Magellanic Penguins Spheniscusmagellanicus: A pilot study

机译：与麦哲伦企鹅Spheniscusmagellanicus中的鱼类进食相比，南极企鹅企鹅Pygoscelis的磷虾取食行为：一项初步研究

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摘要

Inferring feeding activities from undulations in diving depth profiles is widespread in studies of foraging marine predators. This idea, however, has rarely been tested because of practical difficulties in obtaining an independent estimate of feeding activities at a time scale corresponding to depth changes within a dive. In this study we attempted to relate depth profile undulations and feeding activities during diving in a single Chinstrap Penguin Pygoscelis antarctica, by simultaneously using a conventional time-depth recorder and a recently developed beak-angle sensor. Although failure in device attachments meant that data were obtained successfully from just a part of a single foraging trip, our preliminary results show a linear relationship between the number of depth wiggles and the number of underwater beak-opening events during a dive, suggesting that the relative feeding intensity of each dive could be represented by depth-profile data. Underwater beak-opening patterns of this krill-feeding penguin species are compared with recent data from three fish- and squid-feeding Magellanic Penguins Spheniscus magellanicus.
机译：根据潜水深度分布中的起伏来推断觅食活动在觅食海洋捕食者中得到了广泛的应用。但是，由于很难在与潜水深度变化相对应的时间尺度上独立获得摄食活动的估计数，因此这一想法很少得到检验。在这项研究中，我们试图同时使用常规的时深度记录仪和最近开发的喙角传感器，将单个Chinstrap企鹅Pygoscelis南极洲的潜水过程中的深度剖面起伏与进食活动联系起来。尽管设备附件的故障意味着仅从一次觅食之旅的一部分就可以成功获取数据，但我们的初步结果表明，深度摆动的次数与潜水过程中水下喙打开事件的次数之间呈线性关系，这表明每次潜水的相对进水强度可用深度剖面数据表示。将这种以磷虾为食的企鹅物种的水下喙开放模式与最近以三种以鱼和鱿鱼为食的麦哲伦企鹅Spheniscus magellanicus的数据进行了比较。

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