Variations of behavioural patterns during development in the water stick insect |
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Authors: | Ann Cloarec |
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Institution: | (1) Laboratoire d'Ethologie, URA CNRS 373, Université de RENNES I, Campus de Beaulieu, 35042 RENNES cedex, France |
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Abstract: | Variations of associations between different behavioural patterns were analysed during post-embryonic development in the water
stick insect,Ranatra linearis L. (Heteroptera: Nepidae). Behavioural patterns recorded were: quiescence, swimming, crawling, leg waving, body swaying,
respiratory ascents breathing, respiratory descents, grooming and feeding activities (predatory attempts, foreleg movements,
ingestion). A factorial analysis of correspondance stressed the contrast between the organization of larval behaviour and
that of adult behaviour. No behavioural patterns were dropped from the repertoire during post-embryonic development ofRanatra linearis and no new patterns developed in adults outside the reproductive period. Larval behaviour was characterized by more frequent
respiratory activities and grooming and adult behaviour was characterized by more frequent locomotory activities. At all larval
stages grooming was associated with respiratory activities and crawling, but not with feeding activities. |
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