Reduced take-off ability in robins (Erithacus rubecula) due to migratory fuel load
Reduced take-off ability in robins (Erithacus rubecula) due to migratory fuel load
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DOI：
10.1007/s002650050593
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发表时间：
1999-06-01
影响因子：
2.3
通讯作者：
Kullberg, C
中科院分区：
文献类型：
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作者：
Lind, J;Fransson, T;Kullberg, C
最近的研究表明，小鸟的大量燃料负载会损害飞行能力。这是第一项研究，展示了迁徙燃料负载如何影响飞行能力，例如中距离迁徙者在捕食者逃脱情况下起飞时获得的速度和高度，以及它们是否根据捕食者攻击角度调整起飞。一年级知更鸟 (Erithacus rubecula) 受到模型梅林 (Falco columbarius) 的模拟攻击，并分析了起飞速度和角度。翼载荷为 0.19 g cm(-2) 的知更鸟起飞角度比翼载荷为 0.13 g cm(-2) 的知更鸟低 39%，而速度不受影响。知更鸟并没有根据捕食者的攻击角度来调整自己的上升角度。由于许多捕食者依赖突然袭击，因此迁徙知更鸟中发现的不同燃料负载导致的飞行能力差异对于鸟类在实际受到攻击时的生存机会非常重要。
Recent studies have shown that large fuel loads in small birds impair flying ability. This is the first study to show how migratory fuel load affects flying ability, such as velocity and height gained at take-off in a predator escape situation, in a medium-distance migrant, and whether they adjust their take-off according to predator attack angle. First-year robins (Erithacus rubecula) were subjected to simulated attacks from a model merlin (Falco columbarius), and take-off velocity and angle were analysed. Robins with a wing load of 0.19 g cm(-2) took off at a 39% lower angle than robins with a wing load of 0.13 g cm(-2) while velocity remained unaffected. The robins did not adjust their angle of ascent in accordance with the predator's angle of attack. Since many predators rely on surprise attacks, a difference in flight ability due to varying fuel loads found in migrating robins can be important for birds' chances of survival when actually attacked.