Nocturnal departure timing in songbirds facing distinct migratory challenges
Nocturnal departure timing in songbirds facing distinct migratory challenges
复制标题
面临独特迁徙挑战的鸣禽夜间出发时间
DOI：
10.1111/1365-2656.12821
复制
发表时间：
2018
影响因子：
4.8
通讯作者：
Schmaljohann H.
中科院分区：
文献类型：
--
作者：
Müller F;Eikenaar C;Crysler Z.J;Taylor P.D;Schmaljohann H.
大多数候鸟鸣禽通过一系列夜间飞行在繁殖地和越冬地之间迁徙。它们的出发时间决定了潜在的飞行时间，从而决定了迁徙之夜的飞行距离。然而，迁徙鸣禽在夜间出发时间上表现出很大的差异。通过这项研究，我们旨在评估迁徙路线各自的挑战，即距离和性质，是否有助于解释这种变化。在一个中途停留地，我们在春季捕获了两个亚种的北小麦（Oenanthe oenanthe），它们的迁徙路线的距离和性质不同，但在秋季则不然。我们确定了它们在短期圈养期间夜间迁徙不安的开始，并在两个迁徙季节对它们释放后的夜间迁徙时间进行了无线电追踪。当春季面临较长的剩余迁徙距离和延长的海障时，北方麦穗较早开始了夜间迁徙的不安。个别出发方向通常会影响夜间出发时间，提前出发的航班会被引导至各自的迁徙目的地。在春季，这种模式主要出现在携带相对较大燃料储备的鸟类中，但在瘦肉鸟类中不存在。同时，面临剩余迁徙距离短且没有延伸的海障的鸟类通过较早开始夜间迁徙行为（迁徙不安和出发时间）对相对较大的燃料储备产生强烈反应，而在面临长剩余迁徙距离和海障的鸟类中没有发现这种反应。这些结果表明鸟类迁徙活动的基本昼夜时间表适应了后续的迁徙路线。此外，他们建议鸟类调整它们的行为反应，即夜间迁徙行为的开始，为即将到来的迁徙挑战提供燃料储备。这是了解迁徙鸣禽夜间出发时间的变化及其调整的重要一步。此外，它强调了在各自的生态背景下解释鸟类夜间迁徙行为的重要性。
Most migratory songbirds travel between their breeding areas and wintering grounds through a series of nocturnal flights. The timing of their departures defines the potential flight duration and thus the distance covered during a migratory night. Yet, migratory songbirds show substantial variation in their nocturnal departure timing.With this study, we aim to assess whether the respective challenges of the migration route, namely its distance and nature, help to explain this variation.At a stopover site, we caught Northern Wheatears (Oenanthe oenanthe) of two subspecies that differ in distance and nature of their onward migration route in spring, but not in autumn. We determined the start of their nocturnal migratory restlessness during short‐term captivity, and radiotracked their nocturnal departure timing after release in both migration seasons.Northern Wheatears started their nocturnal migratory restlessness earlier when facing a long remaining migration distance and an extended sea barrier in spring. Individual departure directions generally affected the nocturnal departure timing with early departures being directed towards the respective migratory destination. In spring, this pattern was predominantly found in birds carrying relatively large fuel stores, but was absent in lean birds. At the same time, birds facing a short remaining migration distance and no extended sea barrier strongly reacted to relatively large fuel stores by an early start of nocturnal migratory behaviour (migratory restlessness and departure timing), whereas this reaction was not found in birds facing a long remaining migration distance and sea barrier.These results suggest that the basic diel schedule of birds’ migratory activity is adapted to the onward migration route. Further, they suggest that birds adjust their behavioural response, that is start of nocturnal migratory behaviour, to fuel stores in relation to their impending migratory challenges. This is a substantial step in understanding variation of nocturnal departure timing and its adjustments in migratory songbirds. Further, it emphasizes the importance of interpreting birds’ nocturnal migratory behaviour in the respective ecological context.
登录
查看更多内容
影响因子：
2.5
作者：
Bolshakov, Casimir V.;Chernetsov, Nikita;Tsvey, Arseny
通讯作者：
Tsvey, Arseny
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
影响因子：
2.3
作者：
Schmaljohann;Kämpfer;Fritzsch;Eikenaar
通讯作者：
Eikenaar
影响因子：
3.7
作者：
Taylor PD;Mackenzie SA;Thurber BG;Calvert AM;Mills AM;McGuire LP;Guglielmo CG
通讯作者：
Guglielmo CG
影响因子：
1.3
作者：
Bulyuk, VN;Tsvey, A
通讯作者：
Tsvey, A
DOI：
--
发表时间：
2015-10
期刊：
--
影响因子：
--
作者：
Douglas M. Bates;M. Maechler;Ben Bolker;Steven C. Walker
通讯作者：
Douglas M. Bates;M. Maechler;Ben Bolker;Steven C. Walker