KNAW Repository

The influence of conditioning on olfactory microhabitat and host location in Asobara tabida (Nees) and A. rufescens (Foerster) (Braconidae: Alysiinae), larval parasitoids of Drosophilidae

Vet, L.E.M. and Opzeeland van, K. (1984) The influence of conditioning on olfactory microhabitat and host location in Asobara tabida (Nees) and A. rufescens (Foerster) (Braconidae: Alysiinae), larval parasitoids of Drosophilidae. Oecologia, 63, 171-177. ISSN 0029-8549.

[img]PDF - Published Version
6Mb

Official URL: http://dx.doi.org/10.1007/BF00379874

Abstract

Olfactory responses of parasitoids can be variable. This was shown by olfactometer experiments with females of two sibling Asobara species, larval endoparasitoids of Drosophilidae. Oviposition experiences of adult female parasitoids significantly altered their behavioural responses in microhabitat and host location. Females needed prior exposure to a host before they were capable of using volatile compounds related to the presence of their host. Asobara tabida (Nees) attacks Drosophila in fermenting fruits and A. rufescens (Foerster) attacks Drosophilidae in decaying plant materials. Naïve females show a strong preference for the odour of their own microhabitat. After experience with their own host and microhabitat, females were repelled by odours of the other microhabitat. lsquoEnforcedrsquo experience with this repellent microhabitat in the laboratory modified the olfactory response from repellency to attraction. It was shown that even the microhabitat odour preference pattern could be changed through experience. This kind of behavioural flexibility may be the rule rather than the exception in many other Hymenopterous parasitoids.

Item Type:Article
Institutes:Nederlands Instituut voor Ecologie (NIOO)
ID Code:25
Deposited On:14 Mar 2012 01:00
Last Modified:17 Apr 2014 14:06

Repository Staff Only: item control page