Magnetoreception in the wood mouse (Apodemus sylvaticus): influence of weak frequency-modulated radio frequency fields.
Magnetoreception in the wood mouse (Apodemus sylvaticus): influence of weak frequency-modulated radio frequency fields.
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DOI：
10.1038/srep09917
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发表时间：
2015-04-29
影响因子：
4.6
通讯作者：
Burda H
中科院分区：
文献类型：
--
作者：
Malkemper EP;Eder SH;Begall S;Phillips JB;Winklhofer M;Hart V;Burda H
哺乳动物的磁感主要在视力下降的物种中进行研究，如鼹鼠和蝙蝠。对于眼睛发育良好的表层栖息的啮齿动物，我们所知的要少得多。在这里，我们使用一种简单的行为测试来测试木鼠黑线姬鼠的磁感应能力，在这种测试中，小鼠被允许在视觉对称的圆形竞技场上过夜筑巢。这些测试是在环境磁场中或在旋转90°的磁场中进行的。当绘制磁北时，巢在北部和南部呈双峰聚集，清楚地表明这些动物使用了磁性线索。此外，小鼠在周围磁场中进行测试，其中叠加的射频磁场约为100 NT。暴露在0.9兆赫兹到5兆赫兹频率扫描下的木鼠将它们的偏好从南北向改变为东西向。然而，与鸟类相反，调谐到拉莫尔频率(1.33MHZ)的恒定频率场对老鼠的方向没有影响。总而言之，我们证明了木鼠的磁感应，并为哺乳动物的自由基对机制提供了第一个证据。
The mammalian magnetic sense is predominantly studied in species with reduced vision such as mole-rats and bats. Far less is known about surface-dwelling (epigeic) rodents with well-developed eyes. Here, we tested the wood mouse Apodemus sylvaticus for magnetoreception using a simple behavioural assay in which mice are allowed to build nests overnight in a visually symmetrical, circular arena. The tests were performed in the ambient magnetic field or in a field rotated by 90°. When plotted with respect to magnetic north, the nests were bimodally clustered in the northern and southern sectors, clearly indicating that the animals used magnetic cues. Additionally, mice were tested in the ambient magnetic field with a superimposed radio frequency magnetic field of the order of 100 nT. Wood mice exposed to a 0.9 to 5 MHz frequency sweep changed their preference from north-south to east-west. In contrast to birds, however, a constant frequency field tuned to the Larmor frequency (1.33 MHz) had no effect on mouse orientation. In sum, we demonstrated magnetoreception in wood mice and provide first evidence for a radical-pair mechanism in a mammal.
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影响因子：
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通讯作者：
Burda H