King penguins adjust their fine-scale travelling and foraging behaviours to spatial and diel changes in feeding opportunities
King penguins adjust their fine-scale travelling and foraging behaviours to spatial and diel changes in feeding opportunities
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王企鹅根据进食机会的空间和每日变化调整其精细的旅行和觅食行为
DOI：
10.1007/s00227-022-04170-4
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发表时间：
2023
期刊：
影响因子：
2.4
通讯作者：
Bost Charles-Andre
中科院分区：
文献类型：
--
作者：
Watanabe Hina;Shiomi Kozue;Sato Katsufumi;Takahashi Akinori;Handrich Yves;Bost Charles-Andre
中心位置觅食者，如远洋海鸟，经常长途跋涉到达有利可图的觅食区。王企鹅（Aptenodytes patagonicus）是众所周知的，他们的大规模觅食运动到生产力的南极极锋，虽然他们的精细规模的旅行和觅食的特点还不清楚。在这里，我们调查了王企鹅的水平运动和觅食模式，以了解他们的精细规模的运动决策在遥远的觅食之旅。我们附加了多通道数据记录器，可以记录深度，速度，三轴加速度，三轴磁，和环境温度的企鹅和获得的数据（n= 8只鸟）的水平运动率重建潜水路径和他们的喂养尝试估计从游泳速度的快速变化。在前往主要觅食区的过程中，企鹅在夜间和中午前后增加了浅潜（< 50米）的时间，并在黄昏时分增加了深潜（≥ 50米）的时间。深潜时的水平运动速率与最大潜水深度呈负相关，表明在更深处觅食与水平旅行速度下降有关。企鹅集中觅食的努力（更深的潜水和更高的喂养尝试率）在黄昏期间过境，当猎物可能更容易由于昼夜垂直迁移，而他们在夜间和中午迅速旅行时，猎物可能难以检测和访问。这种行为调整对应于鸟类深潜者在捕食表现出昼夜垂直迁移的猎物时长距离旅行所采取的运动策略。
Central place foragers such as pelagic seabirds often travel large distances to reach profitable foraging areas. King penguins (Aptenodytes patagonicus) are well known for their large-scale foraging movements to the productive Antarctic Polar Front, though their fine-scale travelling and foraging characteristics remain unclear. Here, we investigated the horizontal movements and foraging patterns of king penguins to understand their fine-scale movement decisions during distant foraging trips. We attached multi-channel data loggers that can record depth, speed, tri-axis acceleration, tri-axis magnetism, and environmental temperature of the penguins and obtained data (n= 8 birds) on their horizontal movement rates from reconstructed dive paths and their feeding attempts estimated from rapid changes in swim speed. During transit toward main foraging areas, penguins increased the time spent on shallow travelling dives (< 50 m) at night and around midday, and increased the time spent on deep foraging dives (≥ 50 m) during crepuscular hours. The horizontal movement rates during deep dives were negatively correlated with maximum dive depths, suggesting that foraging at greater depths is associated with a decreased horizontal travelling speed. Penguins concentrated their foraging efforts (more deep dives and higher rates of feeding attempts) at twilight during transit, when prey may be more accessible due to diel vertical migration, while they travelled rapidly at night and midday when prey may be difficult to detect and access. Such behavioural adjustments correspond to a movement strategy adopted by avian deep divers to travel long distances while feeding on prey exhibiting diel vertical migration.
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DOI：
--
发表时间：
1994
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