Directional compass preference for landing in water birds.

Directional compass preference for landing in water birds.
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DOI:
10.1186/1742-9994-10-38
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发表时间:
2013-07-08
影响因子:
2.8
通讯作者:
Burda H
Burda H
中科院分区:
生物学2区
文献类型:
--
作者:
Hart V;Malkemper EP;Kušta T;Begall S;Nováková P;Hanzal V;Pleskač L;Ježek M;Policht R;Husinec V;Cervený J;Burda H

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鸟类的着陆飞行要求对速度、到目标的距离和下降斜率进行视觉控制。成群飞行的鸟类也必须保持共同的着陆路线,以避免碰撞。虽然风向可以提供着陆的提示,但在无风条件下着陆方向指示器的性质一直是未知的。我们记录并分析了8个国家14种水鸟的3,338个鸟群的着陆方向。我们表明,首选的着陆方向,独立的方向,鸟类已经到达,是沿着南北轴。我们分析了2,431群绿头鸭(Anas platyrhynchos)在一年中的时间,一天中的时间(以及太阳的位置),天气(晴天或阴天),微风,地点,纬度和磁场的影响,并没有发现这些因素对首选着陆方向的系统影响。我们发现磁北比地理北更能预测着陆方向。在没有任何其他共同点决定着陆方向的情况下,与磁场线的对齐似乎是最合理的,如果不是唯一的解释,在无风和阴天条件下的定向着陆偏好,我们建议,磁场因此提供了一个着陆方向指示器。
Landing flight in birds is demanding on visual control of velocity, distance to target, and slope of descent. Birds flying in flocks must also keep a common course of landing in order to avoid collisions. Whereas the wind direction may provide a cue for landing, the nature of the landing direction indicator under windless conditions has been unknown. We recorded and analysed landing directions of 3,338 flocks in 14 species of water birds in eight countries. We show that the preferred landing direction, independently of the direction from which the birds have arrived, is along the north-south axis. We analysed the effect of the time of the year, time of the day (and thus sun position), weather (sunny versus overcast), light breeze, locality, latitude, and magnetic declination in 2,431 flocks of mallards (Anas platyrhynchos) and found no systematic effect of these factors upon the preferred direction of landing. We found that magnetic North was a better predictor for landing direction than geographic North. In absence of any other common denominator determining the landing direction, the alignment with the magnetic field lines seems to be the most plausible if not the only explanation for the directional landing preference under windless and overcast conditions and we suggest that the magnetic field thus provides a landing direction indicator.
DOI: 10.1007/s00359-011-0674-1
发表时间: 2011-12
影响因子: 2.1
作者:
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发表时间: 1961-01-01
期刊: IBIS
影响因子: 2.1
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发表时间: 2000-02-01
影响因子: 3.4
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通讯作者: Schulten, K
DOI: 10.1371/journal.pone.0051100
发表时间: 2012
期刊: PloS one
影响因子: 3.7
作者:
Hart V;Kušta T;Němec P;Bláhová V;Ježek M;Nováková P;Begall S;Cervený J;Hanzal V;Malkemper EP;Stípek K;Vole C;Burda H
通讯作者: Burda H