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首页> 外文期刊>Current Biology: CB >Spatiotemporal Group Dynamics in a Long-Distance Migratory Bird
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Spatiotemporal Group Dynamics in a Long-Distance Migratory Bird

机译：长距离迁徙鸟类的时空群体动态

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Thousands of species migrate []. Though we have some understanding of where and when they travel, we still have very little insight into who migrates with whom and for how long. Group formation is pivotal in allowing individuals to interact, transfer information, and adapt to changing conditions []. Yet it is remarkably difficult to infer group membership in migrating animals without being able to directly observe them. Here, we use novel lightweight atmospheric pressure loggers to monitor group dynamics in a small migratory bird, the European bee-eater (Merops apiaster). We present the first evidence of a migratory bird flying together with non-kin of different ages and sexes at all stages of the life cycle. In fact, 49% stay together throughout the annual cycle, never separating longer than 5?days at a time despite the ～14,000-km journey. Of those that separated for longer, 89% reunited within less than a month with individuals they had previously spent time with, having flown up to 5,000?km apart. These birds were not only using the same non-breeding sites, but also displayed coordinated foraging behaviors—these are unlikely to result from chance encounters in response to the same environmental conditions alone. Better understanding of migratory group dynamics, using the presented methods, could help improve our understanding of collective decision making during large-scale movements.
机译：成千上万的物种迁移[]。虽然我们对旅行的地方和地点有一些了解，但我们仍然对与谁迁移和多长时间的谁有很少的洞察力。组形成是关键允许个人进行交互，转移信息和适应变化条件的关键[]。然而，在迁移动物的群体成员中，无法直接观察它们是非常困难的。在这里，我们使用小型轻质大气压记录器来监测小候鸟中的组动态，欧洲蜜蜂（Merops Apiaster）。我们展示了一只候鸟与生命周期的所有阶段的不同年龄和性别的非亲属一起飞行的候鸟。事实上，49％的年度周期保持在一起，尽管〜14,000公里的旅程，但在一次的时间里从不分离超过5日。在那些分开的人的时间里，89％的人在不到一个月内重聚，他们以前已经花费的时间与他们一起度过的人，弗兰特飞往5000 km。这些鸟类不仅使用相同的非繁殖场所，而且还表现出协调的觅食行为 - 这些鸟类不太可能因单独遇到相同的环境条件而遇到的偶然遇到。利用所提出的方法更好地了解迁移群体动态，可以帮助改善我们对大规模运动中集体决策的理解。

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