Change in the character of directional motor reactions of female crickets <Emphasis Type="Italic">Gryllus argetinus</Emphasis> Sauss. to intraspecies signals under conditions of sensory pathology at different stages of imaginal ontogenesis |
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Authors: | M K Zhemchuzhnikov A N Knyazev |
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Institution: | 1.Sechenov Institute of Evolutionary Physiology and Biochemistry,Russian Academy of Sciences,St. Petersburg,Russia |
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Abstract: | The character of motor activity of female crickets Gryllus argentinus Sauss. executing reproductive and defense behavior was studied under normal conditions and under conditions of inactivation
of the cercal organ at different stages of imaginal ontogeny (on day 2, 7 and 12). Various forms of motor reactions of females
placed on a movable spherical support to models of intraspecies calling and aggressive male signals were described and analyzed.
Reversible inactivation of cercal receptors was shown to result in disturbance of the mechanisms of realization of normal
reproductive behavior at the end of pre-reproductive and in the beginning of reproductive periods of imaginal ontogeny. It
is manifested as statistically significant reduction of the proportion of positive phonotactic reactions in response to a
model of the male calling song in animals with experimental sensory pathology as compared to control groups of crickets (the
norm). No significant differences in proportions of typical directional motor reactions to presentation of the aggressive
signal under normal conditions and under conditions of sensory pathology were found. Thus preservation of the tympanic organ
was demonstrated to be a necessary but not sufficient condition for realization of adequate acoustic reproductive behavior.
Only working together, distant mechanoreceptor systems (the cercal and tympanic ones) are able to provide adequacy of behavior.
This conclusion confirmed the proposed earlier hypothesis about interaction of distant mechanoreceptor systems and about existence
of an integrated sensory complex necessary for realization of adequate behavior of insects. |
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