Time of nocturnal departures in European robins, Erithacus rubecula, in relation to celestial cues, season, stopover duration and fat stores
Time of nocturnal departures in European robins, Erithacus rubecula, in relation to celestial cues, season, stopover duration and fat stores
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DOI：
10.1016/j.anbehav.2006.10.024
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发表时间：
2007-10-01
期刊：
影响因子：
2.5
通讯作者：
Tsvey, Arseny
中科院分区：
文献类型：
--
作者：
Bolshakov, Casimir V.;Chernetsov, Nikita;Tsvey, Arseny
要确定的机制控制的时间表的夜间迁徙战斗在小鸣禽的性质，我们研究了出发的时间在一个中等距离的夜间迁徙，欧洲知更鸟，在Courish Spit（东南波罗的海沿岸）使用无线电遥测。对100只鸟（58只在秋季，42只在春季）的出发时间进行了精确测量，结果表明，在夜间航海黄昏期间，夜间出发没有固定的时间窗口。起飞发生在整个晚上，甚至在早晨天文和航海黄昏时期。起飞时间在晴天和阴天条件下没有显着差异，季节之间有显着差异。与秋季相比，春季的中位出发时间在较短的夜晚明显向日落方向移动。在这两个季节中，（1）欧洲知更鸟在短暂（1-2天）停留后开始战斗，在到达时具有小型和大型燃料储存的个体之间的离开时间没有显着差异;（2）离开时间与停留时间显着相关：鸟类停留时间越长，它们离开日落的时间越早。只有在春天和最长的中途停留后，所有的离开都发生在日落后不久的短时间内。
To identify the mechanisms of control of temporal schedule of nocturnal migratory fights in small songbirds in nature, we studied the time of departure in a medium-distance nocturnal migrant, the European robin, on the Courish Spit ( southeastern Baltic coast) using radiotelemetry. Exact measurements of departure time in 100 birds ( 58 in autumn and 42 in spring) showed no fixed time window of nocturnal departures during Evening Nautical Twilight. Take-offs occurred throughout the night and even during Morning Astronomical and Nautical Twilight Periods. Departure time showed no significant difference between clear skies and overcast conditions, and significantly differed between the seasons. The median departure time shifted significantly towards sunset during shorter nights in spring as compared to autumn. In both seasons (1) European robins initiating fight after short (1-2 days) stopovers showed no significant differences in departure time between individuals with small and large fuel stores at arrival; and ( 2) departure time was significantly related to stopover duration: the longer the birds stayed, the earlier they departed in relation to sunset. Only in spring and after longest stopovers, all departures occurred within a short time window soon after sunset.