Ruther, Joachim and Doering, Mathias and Steiner, Sven (2011) Cuticular hydrocarbons as contact sex pheromone in the parasitoid Dibrachys cavus. ENTOMOLOGIA EXPERIMENTALIS ET APPLICATA, 140 (1). pp. 59-68. ISSN 0013-8703, 1570-7458
Full text not available from this repository. (Request a copy)Abstract
Cuticular hydrocarbons (CHCs) cover the cuticle of virtually any insect and do not only protect them from desiccation, but also possess various communicative functions. Previous studies suggested a function as contact sex pheromones in the parasitic wasp family Pteromalidae, but further species need to be studied before more general conclusions are possible. Here, we demonstrate a contact sex pheromone in females of Dibrachys cavus (Walker) (Hymenoptera: Pteromalidae). Males of this parasitoid were arrested on cadavers of 1- to 2-day-old females, but neither on newly emerged females nor on males. Extracts from 1- to 2-day-old females and non-polar fractions were also behaviorally active suggesting a non-polar contact sex pheromone. Chemical analyses of bioactive and non-active CHC profiles by gas chromatography-mass spectrometry and subsequent principal component analysis (PCA) revealed that the bioactive profiles from 1- to 2-day-old females were clearly distinguishable from all other profiles. Among the chemicals showing the strongest impact in the PCA were the two 3-methylalkanes 3-methylnonacosane and 3-methylhentriacontane, which were absent or trace components in the inactive profiles and whose relative amounts increased in females when they became sexually attractive. The putative function of 3-methylalkanes as key components of the contact sex pheromones in Pteromalidae is discussed.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | AGRILUS-PLANIPENNIS FAIRMAIRE; EMERALD ASH BORER; LARIOPHAGUS-DISTINGUENDUS; COURTSHIP BEHAVIOR; SOCIAL WASP; IDENTIFICATION; HYMENOPTERA; COLEOPTERA; COMPONENT; PTEROMALIDAE; courtship; parasitic wasp; arrestment; Hymenoptera; Pteromalidae; sexual communication; mate recognition cue; 3-methylalkanes |
| Subjects: | 500 Science > 590 Zoological sciences |
| Divisions: | Biology, Preclinical Medicine > Institut für Zoologie > Chemische Ökologie (Prof. Dr. Joachim Ruther) |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 08 Jun 2020 10:45 |
| Last Modified: | 08 Jun 2020 10:45 |
| URI: | https://pred.uni-regensburg.de/id/eprint/20585 |
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