The role of the antennae in the compass-based orientation of the equatorial sandhopper Talorchestia martensii Weber (Crustacea Amphipoda)

The role of the antennae in the compass-based orientation of the equatorial sandhopper Talorchestia martensii Weber (Crustacea Amphipoda)
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触角在赤道沙漏 Talorchestia martensii Weber(甲壳纲 Amphpoda)基于指南针定向中的作用

DOI:
10.1080/03949370.2020.1844303
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发表时间:
2020
影响因子:
1.2
通讯作者:
Ugolini A
Ugolini A
中科院分区:
生物学4区
文献类型:
--
作者:
Ugolini A

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赤道沙蝉利用太阳、月亮和自然磁场作为指南针的参考。在某些节肢动物物种中,触角对于时间补偿的太阳定向是重要的。因此,我们评估了触角在太阳,月球和磁罗盘定位中的作用。我们在黑暗中,在太阳或月亮下,在有和没有磁场水平分量的情况下,将完整和无触角的个体释放在有机玻璃碗中,并记录它们的方向。在月球下进行的试验中,在月球的中等方位角速度(10-15°/小时)和高方位角速度(10 - 59°/小时)的条件下释放了沙蝉。无触角和完整的个体之间的定向行为没有显着差异。因此,天线似乎并不涉及太阳或月亮指南针机制的T。martensii。在月球的高方位角速度和磁场的水平分量为零的情况下释放的个体所表现出的光正性响应表明,由于月球的方位角速度的变化,月球可能不被用作该物种的计时罗盘参考。这表明了一种趋光性机制,因此与使用月球罗盘的温带地区的沙蝉不同。
The equatorial sandhopperTalorchestia martensiiuses the sun, the moon and the natural magnetic field as orienting compass references. In some arthropod species, the antennae are important for time compensated solar orientation. Therefore, we evaluated the role of antennae in solar, lunar and magnetic compass orientation inT. martensii. We released intact and antennaeless individuals in a Plexiglas bowl in the dark, and under the sun or moon, with and without the horizontal component of the magnetic field and recorded their orientation. For the tests under the moon, sandhoppers were released in conditions of modest azimuthal speed (10–15°/hr) and high azimuthal speed (≈ 59°/hr) of the moon. No significant difference in the orienting behaviour between antennaeless and intact individuals was observed. Therefore, the antennae do not seem to be involved in the sun or moon compass mechanisms ofT. martensii. The photopositive responses showed by individuals released under high azimuthal speed of the moon and with the horizontal component of the magnetic field zeroed, indicate that the moon is probably not used as a chronometric compass reference in this species because of the variations in its azimuthal speed. This suggests a mechanism of photomenotaxis and therefore, a difference from sandhoppers from temperate latitudes that use a moon compass.
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