No alignment of cattle along geomagnetic field lines found
No alignment of cattle along geomagnetic field lines found
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DOI：
10.1007/s00359-011-0628-7
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发表时间：
2011-06-01
影响因子：
2.1
通讯作者：
Pavlicek, A.
中科院分区：
文献类型：
--
作者：
Hert, J.;Jelinek, L.;Pavlicek, A.
本文基于谷歌卫星照片，对欧洲几个国家的自由牧场上家牛的身体定位进行了研究。总而言之，共评估了232个牛群，3412只个体。两个独立的小组参与了我们的研究，并得出了相同的结论，与其他研究人员最近的发现相反，没有发现动物和它们的牛群沿着地磁线排列。造成这种差异的几个可能的原因应该被考虑在内：谷歌卫星照片的质量很差，很难确定身体轴，在牛群中选择牛群或动物，评估中没有盲目，可能存在潜意识偏见，最重要的是，计算出的瑞利向量的主要方向对某种偏差或对某些被忽视或忽略的混淆具有很高的敏感性。这一因素很容易导致关于磁接收的存在的未经证实的肯定结论。
This paper presents a study of the body orientation of domestic cattle on free pastures in several European states, based on the Google satellite photographs. In sum, 232 herds with 3,412 individuals were evaluated. Two independent groups participated in our study and came to the same conclusion that in contradiction to the recent findings of other researchers, no alignment of the animals and of their herds along geomagnetic field lines could be found. Several possible reasons for this discrepancy should be taken into consideration: poor quality of Google satellite photographs, difficulties in determining the body axis, selection of herds or animals within herds, lack of blinding in the evaluation, possible subconscious bias, and, most importantly, high sensitivity of the calculated main directions of the Rayleigh vectors to some kind of bias or to some overlooked or ignored confounder. This factor could easily have led to an unsubstantiated positive conclusion about the existence of magnetoreception.