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首页> 外文期刊>Marine ecology progress series >Albatross-borne loggers show feeding on deep-sea squids: implications for the study of squid distributions
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Albatross-borne loggers show feeding on deep-sea squids: implications for the study of squid distributions

机译：信天翁的记录员展示了以深海鱿鱼为食：对鱿鱼分布研究的意义

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How surface-feeding albatrosses feed on deep-sea squids has long been a mystery. We investigated foraging behavior during daylight hours of 20 Laysan albatrosses Phoebastria immutabilis breeding in Hawaii using GPS- and camera-loggers. The birds traveled to the North Pacific Transition Zone up to 600 km north of their breeding site. The camera images showed that Laysan albatrosses fed on large (similar to 1 m body length), intact floating dead squids (6 events) and floating fragmented squids (10 events) over deep oceanic water (2000 m) while they flew in a straight path without sinuous searching. Feeding events on squids were not observed during trips when fishing vessels were photographed and seemed to be distributed randomly and sparsely. Thus, this study suggests that Laysan albatrosses found large, presumably post-spawning, squids opportunistically while they were traveling during daylight hours. Although we did not find cetaceans in our surface pictures, we could not rule out the possibility that birds fed on squids, especially fragmented specimens, in the regurgitates of cetaceans at depth. This study demonstrates the usefulness of combining animal-borne GPS- and camera-loggers on wide-ranging top predators for studying the distribution of little known deep-sea squids and their importance in the diet of marine top predators.
机译：表面饲养信天翁如何以深海乌贼为食一直是一个谜。我们使用GPS和相机记录仪在夏威夷调查了20种Laysan albatrosses Phoebastria immutabilis品种在白天的觅食行为。这些鸟类前往繁殖地点以北600公里处的北太平洋过渡区。相机图像显示，赖山信天翁以大的（直立飞行）为食，在深海水域（> 2000 m）上以完整的漂浮的死鱿鱼（6个事件）和漂浮的碎鱿鱼（10个事件）为食。没有曲折搜索的路径。在旅途中，在拍摄渔船时未观察到鱿鱼的摄食事件，并且似乎随机而稀疏地分布。因此，这项研究表明，莱山信天翁在白天旅行时偶然发现了大的，可能产卵后的鱿鱼。尽管我们在表面图片中没有找到鲸类，但我们不能排除在深处鲸类反刍动物以鱿鱼为食的可能性，尤其是零碎的标本。这项研究表明，将动物载GPS记录仪和照相机记录器结合在广泛的顶级捕食者上，对于研究鲜为人知的深海鱿鱼的分布及其在海洋顶级捕食者饮食中的重要性是有用的。

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