Static electric field detection and behavioural avoidance in cockroaches
Static electric field detection and behavioural avoidance in cockroaches
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DOI：
10.1242/jeb.019901
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发表时间：
2008-12-01
影响因子：
2.8
通讯作者：
Jackson, Christopher W.
中科院分区：
文献类型：
--
作者：
Newland, Philip L.;Hunt, Edmund;Jackson, Christopher W.
电场普遍存在于环境中，其产生既是人为活动的结果，也是自然发生的结果。我们分析了蟑螂对静电场的行为，并确定了其行为反应的生理机制。使用 Y 选择室测试动物对电场的反应行为，该室的一个臂中产生电场。运动行为和回避行为受到电场强度的影响，当手臂入口处的静电场高于 8-10 kV m(-1) 时，高达 85% 的人会避开带电手臂。人们发现电场会导致触角偏转，但当触角被手术切除后，蟑螂避开电场的能力就被消除了。触角各个关节的固定表明，位于头鞘底部的毛板感觉感受器主要负责检测电场，并且当触角围绕头鞘关节的运动被阻止时，蟑螂无法避开电场。为了克服在电场存在的情况下无法进行电生理分析的技术问题，我们开发了一种程序，使用磁场结合将铁颗粒施加到天线上来偏转天线，并分析胸部中间神经元在发出这种偏转信号中的作用。讨论了高压电力线中电场的避免。
Electric fields are pervasively present in the environment and occur both as a result of man-made activities and through natural occurrence. We have analysed the behaviour of cockroaches to static electric fields and determined the physiological mechanisms that underlie their behavioural responses. The behaviour of animals in response to electric fields was tested using a Y-choice chamber with an electric field generated in one arm of the chamber. Locomotory behaviour and avoidance were affected by the magnitude of the electric fields with up to 85% of individuals avoiding the charged arm when the static electric field at the entrance to the arm was above 8-10 kV m(-1). Electric fields were found to cause a deflection of the antennae but when the antennae were surgically ablated, the ability of cockroaches to avoid electric fields was abolished. Fixation of various joints of the antennae indicated that hair plate sensory receptors at the base of the scape were primarily responsible for the detection of electric fields, and when antennal movements about the head-scape joint were prevented cockroaches failed to avoid electric fields. To overcome the technical problem of not being able to carry out electrophysiological analysis in the presence of electric fields, we developed a procedure using magnetic fields combined with the application of iron particles to the antennae to deflect the antennae and analyse the role of thoracic interneurones in signalling this deflection. The avoidance of electric fields in the context of high voltage power lines is discussed.