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Sexual dimorphism in the lipid fraction of the defensive secretion ofGastrophysa viridula (Coleoptera: Chrysomelidae)

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Abstract

The lipid fraction of the defensive secretion of adultGastrophysa viridula was analyzed by gas-liquid chromatography and gas chromatography-mass spectrometry. Three long chain acetates and two methyl-branched hydrocarbons were identified and their amounts in the secretion of single field-collected and laboratory-reared beetles determined. The composition of the secretion was affected by the sex, reproductive status, and age of the beetle. The ratio of (Z)-11-eicosenyl acetate to (Z)-13-docosenyl acetate ranged from 0.30 to 0.78 in male beetles and from 1.05 to 2.06 in female beetles. The biological significance of this sexual dimorphism is discussed.

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Authors and Affiliations

  1. Laboratoire de Chimie Bio-organique, Faculté des Sciences, Université Libre de Bruxelles, Av. F.D. Roosevelt 50, B-1050, Bruxelles, Belgium

    F. Eggenberger, S. Heilporn & D. Daloze

  2. Laboratoire de Biologie Animale et Cellulaire, Faculté des Sciences, Université Libre de Bruxelles, Av. F.D. Roosevelt 50, B-1050, Bruxelles, Belgium

    F. Eggenberger & J. M. Pasteels

  3. Biocomputing, Biozentrum der Universität Basel, Klingelbergstrasse 70, CH-4056, Basel, Switzerland

    F. Eggenberger

Authors
  1. F. Eggenberger
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  2. S. Heilporn
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  3. D. Daloze
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  4. J. M. Pasteels
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Eggenberger, F., Heilporn, S., Daloze, D. et al. Sexual dimorphism in the lipid fraction of the defensive secretion ofGastrophysa viridula (Coleoptera: Chrysomelidae). Experientia 50, 766–770 (1994). https://doi.org/10.1007/BF01919379

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  • DOI: https://doi.org/10.1007/BF01919379

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