磁场变化对粘虫飞行定向行为的影响
The effect of converted magnetic fields on orientation behavior of armyworm moths Mythimna separata (Walker)
高月波1, 2 胡 高1 翟保平1
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DOI:
作者单位:1. 南京农业大学昆虫学系,农业部病虫害监测与治理重点开放实验室,南京 210095;2. 吉林省农业科学院植物保护研究所,农业部东北作物有害生物综合治理重点实验室,公主岭 136100
中文关键词:人工模拟磁场,粘虫,定向行为,正常磁场,反向磁场,强磁场,磁倾角
英文关键词:artificial simulated magnetic fields, Mythimna separata, orientation behavior, local geomagnetic field, horizontal component reversed, strong magnetic field, magnetic inclination
中文摘要:
【目的】 研究磁场的变化对于粘虫Mythimna separata(Walker)飞行中定向行为的影响,为揭示空中迁飞虫群的飞行行为机制提供基础理论依据。【方法】 在人工模拟磁场条件下对粘虫的定向行为进行了比较研究。【结果】 试虫在正常地磁场条件下表现为显著的群体共同定向。粘虫群体的共同定向是轴对称的。当将试虫置于较强的磁场条件下时,粘虫供试个体的定向行为发生变化,群体共同定向行为消失。试虫的定向行为不受磁场水平分量极向变化的影响。【结论】 迁飞性昆虫可能利用磁场作为自身定向的罗盘信号,在这个过程中可能和鸟类一样利用了磁倾角。
英文摘要:[Objectives] To determine the effect of converted magnetic fields on the orientation behavior of armyworm moths Mythimna separata (Walker) and to provide a theoretical basis for the behavioral mechanisms of aerial migratory insects. [Methods] The orientation behavior of M. separata was studied in artificial simulated magnetic fields. [Results] Experimental moths exhibited significant common axial orientation with respect to local geomagnetic fields. The moths obviously changed their heading in stronger magnetic field in which case the common orientation disappeared. Orientation behavior was not affected by changing the polarity of the horizontal component of the magnetic field. [Conclusion] Magnetic inclination may provide the compass cues required for aerial migratory insects to achieve collective orientation like birds.