SEXUAL DIMORPHISM IN THE LIPID FRACTION OF THE DEFENSIVE SECRETION OFGASTROPHYSA-VIRIDULA (COLEOPTERA, CHRYSOMELIDAE)

Authors
EGGENBERGER F HEILPORN S DALOZE D PASTEELS JM
Citation
F. Eggenberger et al., SEXUAL DIMORPHISM IN THE LIPID FRACTION OF THE DEFENSIVE SECRETION OFGASTROPHYSA-VIRIDULA (COLEOPTERA, CHRYSOMELIDAE), Experientia, 50(8), 1994, pp. 766-770
Citations number
17
Categorie Soggetti
Multidisciplinary Sciences
Journal title
Experientia → ACNP
ISSN journal
00144754
Volume
50
Issue
8
Year of publication
1994
Pages
766 - 770
Database
ISI
SICI code
0014-4754(1994)50:8<766:SDITLF>2.0.ZU;2-6
Abstract
The lipid fraction of the defensive secretion of adult Gnstrophysa vir idula 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 sin gle field-collected and laboratory-reared beetles determined. The comp osition of the secretion was affected by the sex, reproductive status, and age of the beetle. The ratio of (Z)-11-eicosenyl acetate to (Z)-1 3-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 se xual dimorphism is discussed.