Changes in the Escape Eliciting System of a Cricket Revealed by Sensory Deprivation during Postembryonic Development(Behavior Biology)

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In the air-puff-evoked escape behavior of the cricket Gryllus bimaculatus, the effect of a unilateral cereal ablation and the process of behavioral recovery were investigated during postembryonic development. The response rate (relative occurrence of the escape behavior in response to an air puff stimulus) and the escape direction (relative to the stimulus direction) in first-, third-, sixth- and last-instar nymphs were almost identical with those of adults. A unilateral cereal ablation in the nymphs caused a decrease in the response rate and an increase in the number of misoriented escapes as have been observed in adults. However, the effect of ablation on the response rate was less in younger insects, i. e., the escape-eliciting potential of one cercus decreased during postembryonic development. Instead, facilitation of sensory inputs from both cerci essentially occurs, thus explaining the constant response rate throughout the developmental period. The response rate of the ablated insects measured after the final molt showed a compensational increase even when the cereal regenerates were removed at each molt. Although the final response rate was higher in crickets ablated from earlier stages, the recovery ratio was larger in crickets ablated from later stages. Regarding escape direction, a compensational change was observed in insects ablated from the first and the third instars. However, crickets ablated from the sixth and the last instar did not show any recovery in escape direction. The time course of the recovery in escape direction appears different between adults and nymphs.
社団法人日本動物学会の論文
2001-08-10

Changes in the Escape Eliciting System of a Cricket Revealed by Sensory Deprivation during Postembryonic Development(Behavior Biology)

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