It is known that animals are sensitive to the geomagnetic field. In the case of insects, magnetoreception has been reported in several ant species and in some bees and wasps. One study showed that the stingless bee Tetragonisca angustula is able to sense the modification of the magnetic field inclination. The aim of the present manuscript is to continue that study in T. angustula, analyzing the nest arrival and departure angles in the presence of magnetic fields generated by magnets. The bees flying to and from the nest were recorded and the flying trajectories were obtained by analyzing the video frame by frame. The magnetic field was generated by 6, 9, or 12 magnets contained inside an Eppendorf tube and fixed near the nest. Our results show that T. angustula bees are sensitive to magnetic fields because the departure angles are influenced by the magnets. It was observed that these bees are sensitive to the polarization of the magnetic field vector that influences the choice of flying up or down, and this sensitivity has a window until about 80 μT (about four times the local geomagnetic field), with the magnetic field information for higher magnetic field intensities being ignored by the bees. Bioelectromagnetics. 2021;42:51–59. © 2020 Bioelectromagnetics Society

中文翻译：

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无刺蜂 Tetragonisca angustula 的磁敏感性：磁倾角可以改变从巢中飞行的起飞角度的选择

众所周知，动物对地磁场很敏感。在昆虫的情况下，已经报道了几种蚂蚁物种以及一些蜜蜂和黄蜂的磁感受。一项研究表明，无刺蜂Tetragonisca angustula能够感知磁场倾角的变化。本手稿的目的是继续在T. angustula中进行这项研究，分析在磁铁产生的磁场存在的情况下巢的到达角和离开角。记录蜜蜂飞入和飞出巢穴的情况，并通过逐帧分析视频获得飞行轨迹。磁场由包含在 Eppendorf 管内并固定在巢附近的 6、9 或 12 个磁铁产生。我们的结果表明，T. angustula蜜蜂对磁场很敏感，因为离去角受磁铁的影响。据观察，这些蜜蜂对影响向上或向下飞行选择的磁场矢量的极化很敏感，并且这种敏感性有一个窗口，直到大约 80 μT（大约是当地地磁场的四倍），随着磁场蜜蜂忽略了更高磁场强度的信息。生物电磁学。2021；42：51-59。© 2020 生物电磁学会