Start of nocturnal migratory restlessness in captive birds predicts nocturnal departure time in free-flying birds
Start of nocturnal migratory restlessness in captive birds predicts nocturnal departure time in free-flying birds
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圈养鸟类夜间迁徙不安的开始预示着自由飞行鸟类的夜间出发时间
DOI：
10.1007/s00265-015-1902-4
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发表时间：
2015
影响因子：
2.3
通讯作者：
Eikenaar
中科院分区：
文献类型：
--
作者：
Schmaljohann;Kämpfer;Fritzsch;Eikenaar
在夜间鸣禽迁徙中，迁徙的总速度取决于鸟类停留在中途停留的时间，在那里它们补充先前飞行中使用的燃料储备，以及它们的旅行速度。与影响中途停留时间的因素相比，人们对飞行速度的个体差异知之甚少，飞行速度是鸟类对地速度和飞行时间的组合。后者直接受夜间出发时间的影响。地面速度可以很容易地跟踪，例如，但是，人们对候鸟在夜间什么时候出发知之甚少，更不用说影响其变化的因素了。研究因素如何导致夜间离开时间的变化，需要一个实验装置，允许从室内实验，其中环境条件可以控制或操纵的结果，自由飞翔的鸟类的行为。在这里，我们表明，夜间迁徙不安的笼中鸣禽“Zugunruhe”的开始显着正相关的无线电跟踪夜间离开时间的第二天晚上。我们现在可以开始确定导致夜间迁徙不安开始的个体差异的因素，并将这些结果转移到夜间的出发时间。这将使我们更好地了解为什么旅行速度和移民的总速度会因个体而异，以及它如何受到环境变化的影响。
In nocturnal songbird migrants, total speed of migration is determined by the time birds stay at stopovers, where they replenish fuel reserves used during previous flights, and by their travel speed. In contrast to factors influencing stopover duration, little is known about individual variation in travel speed which is a combination of birds’ ground speed and the time spent flying. The latter is directly affected by nocturnal departure time. Ground speed can be easily tracked, e.g., by radar, but not much is known about when migrants set off within the night, let alone factors influencing its variation. Studying how factors cause variation in nocturnal departure time requires an experimental setup that allows transferring results from indoor experiments, where environmental conditions can be controlled for or manipulated, to the behavior of free-flying birds. Here, we show that the start of nocturnal migratory restlessness „Zugunruhe” of caged songbirds was significantly positively related to their radio-tracked nocturnal departure time the following night. We can now start identifying factors causing individual variation in the start of nocturnal migratory restlessness and transfer these results to departure times within the night. This will improve our understanding of why travel speed, and with that total speed of migration, varies individually and how it is affected by environmental changes.
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迁徙鸣鸟的夜间探索性飞行、出发时间和方向
影响因子：
1.3
作者：
Heiko Schmaljohann;P. J. Becker;Hakan Karaardıç;F. Liechti;B. Naef;Celia Grande
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Celia Grande
DOI：
10.1007/978-3-662-05957-9_10
发表时间：
2003
期刊：
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影响因子：
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作者：
Heiko Schmaljohann;F. Korner‐Nievergelt;B. Naef;R. Nagel;I. Maggini;M. Bulte;F. Bairlein
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影响因子：
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作者：
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通讯作者：
F. Moore