Further support for the alignment of cattle along magnetic field lines: reply to Hert et al.
Further support for the alignment of cattle along magnetic field lines: reply to Hert et al.
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DOI：
10.1007/s00359-011-0674-1
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发表时间：
2011-12
影响因子：
2.1
通讯作者：
Nemec, P.
中科院分区：
文献类型：
--
作者：
Begall, S.;Burda, H.;Cerveny, J.;Gerter, O.;Neef-Weisse, J.;Nemec, P.
赫特等人。 (J Comp Physiol A) 对 Begall 等人的研究的一部分提出了质疑。 （PNAS 105：13451–13455，）声称他们无法复制谷歌地球航空图像中记录的牛优先磁排列的发现。然而，赫特和合著者使用了不同的统计方法，并将统计数据应用于部分不适合检查磁对准的样本。大约 50% 的数据代表噪声（图像分辨率太差，无法明确测量身体轴的方向、牧场位于斜坡上、靠近定居点或高压电线等）。此外，作者仅选择了分析牧场上约 40% 的牛进行分析。在这里，我们重新分析了所有可用数据，结果表明，在赫特和合著者分析的牧场上，牛的身体轴线在南北方向上显着对齐。因此，这一发现支持了我们之前的研究。此外，我们通过使用具有良好分辨率的航空谷歌地球图像表明，磁对准在牛休息时比站立时更明显。本文的在线版本 (doi:10.1007/s00359-011-0674-1) 包含补充材料，可供授权用户使用。
Hert et al. (J Comp Physiol A,) challenged one part of the study by Begall et al. (PNAS 105:13451–13455,) claiming that they could not replicate the finding of preferential magnetic alignment of cattle recorded in aerial images of Google Earth. However, Hert and co-authors used a different statistical approach and applied the statistics on a sample partly unsuitable to examine magnetic alignment. About 50% of their data represent noise (resolution of the images is too poor to enable unambiguous measurement of the direction of body axes, pastures are on slopes, near settlements or high voltage power-lines, etc.). Moreover, the authors have selected for their analysis only ~ 40% of cattle that were present on the pastures analyzed. Here, we reanalyze all usable data and show that cattle significantly align their body axes in North–South direction on pastures analyzed by Hert and co-authors. This finding thus supports our previous study. In addition, we show by using aerial Google Earth images with good resolution, that the magnetic alignment is more pronounced in resting than in standing cattle. The online version of this article (doi:10.1007/s00359-011-0674-1) contains supplementary material, which is available to authorized users.
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影响因子：
2.5
作者：
Sarova, Radka;Spinka, Marek;Simecek, Petr
通讯作者：
Simecek, Petr
DOI：
10.1073/pnas.0811194106
发表时间：
2009-04-07
影响因子：
11.1
作者：
Burda, Hynek;Begall, Sabine;Nemec, Pavel
通讯作者：
Nemec, Pavel
DOI：
10.1073/pnas.0803650105
发表时间：
2008-09-09
影响因子：
11.1
作者：
Begall, Sabine;Cerveny, Jaroslav;Burda, Hynek
通讯作者：
Burda, Hynek
DOI：
10.1007/s00359-011-0628-7
发表时间：
2011-06-01
影响因子：
2.1
作者：
Hert, J.;Jelinek, L.;Pavlicek, A.
通讯作者：
Pavlicek, A.