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首页> 外文期刊>Proceedings of the Royal Society of London. Biological sciences >Do release-site biases reflect response to the Earth's magnetic field during position determination by homing pigeons?
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Do release-site biases reflect response to the Earth's magnetic field during position determination by homing pigeons?

机译：归巢鸽子在确定位置的过程中，释放位置的偏向是否反映对地球磁场的响应？

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摘要

How homing pigeons (Columba livia) return to their loft from distant, unfamiliar sites has long been a mystery. At many release sites, untreated birds consistently vanish from view in a direction different from the home direction, a phenomenon called the release-site bias. These deviations in flight direction have been implicated in the position determination (or map) step of navigation because they may reflect local distortions in information about location that the birds obtain from the geophysical environment at the release site. Here, we performed a post hoc analysis of the relationship between vanishing bearings and local variations in magnetic intensity using previously published datasets for pigeons homing to lofts in Germany. Vanishing bearings of both experienced and naive birds were strongly associated with magnetic intensity variations at release sites, with 90 per cent of bearings lying within +/-29 degrees of the magnetic intensity slope or contour direction. Our results (i) demonstrate that pigeons respond in an orderly manner to the local structure of the magnetic field at release sites, (ii) provide a mechanism for the occurrence of release-site biases and (iii) suggest that pigeons may derive spatial information from the magnetic field at the release site that could be used to estimate their current position relative to their loft.
机译：赛鸽（Columba livia）如何从遥远，陌生的地方返回鸽舍，一直是一个谜。在许多释放地点，未经处理的鸟类始终以与原始方向不同的方向消失，这种现象称为释放地点偏差。这些飞行方向上的偏差与导航的位置确定（或地图）步骤有关，因为它们可能反映出鸟类在释放地点从地球物理环境获得的位置信息中的局部失真。在这里，我们使用先前发布的德国归巢鸽舍数据集，对消失的轴承与局部磁场强度之间的关系进行事后分析。有经验的鸟类和幼稚鸟类的消失轴承与释放部位的磁场强度变化密切相关，其中90％的轴承位于磁场强度斜率或轮廓方向的+/- 29度内。我们的结果（i）表明鸽子对释放部位磁场的局部结构有序响应，（ii）为释放部位偏倚的发生提供了一种机制，并且（iii）建议鸽子可能获得空间信息从释放位置的磁场中提取，可以用来估计其相对于杆面倾角的当前位置。

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