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Post-copulatory male behaviour, sperm precedence and multiple mating in a solitary parasitoid wasp

Citation

Allen, GR and Kazmer, DJ and Luck, RF, Post-copulatory male behaviour, sperm precedence and multiple mating in a solitary parasitoid wasp, Animal Behaviour, 48, (3) pp. 635-644. ISSN 0003-3472 (1994) [Refereed Article]

Copyright Statement

Copyright 1994 The Association for the Study of Animal Behaviour

DOI: doi:10.1006/anbe.1994.1283

Abstract

Female Aphytis melinus (Hymenoptera: Aphelinidae), previously thought to be unreceptive after their first mating, mated multiply in the field at an incidence of at least 32-67%. In spring the adult sex ratio was female biased while in autumn it was male biased. Following copulation, male A. melinus guard females for an average of 149 s during which they display behaviour identical to that seen prior to copulation. Behavioural experiments using genetically marked pairs of males were set up to test several hypotheses concerning the adaptive significance of guarding and post-insemination displays. The behaviour seen during guarding probably keeps the female quiescent but does not influence the fate of second-male sperm. Second males that did not guard achieved equal paternity to those that did. Guarding and its associated post-copulatory behaviour helped 'switch off' female receptivity. The percentage of second males that managed to achieve intromission, if attempting to mate with a previously guarded female, dropped from 97 to 70%. Furthermore, males courting a previously guarded female scored significantly more contacts, unsuccessful mounts, time to achieve the successful mount, wingbeats, and time in the successful pre-coital mount. Last-male sperm precedence did not occur. Second males sired 305% of the progeny if the guarding male was immediately dislodged and 142% of the progeny if the first male was allowed to complete guarding. Thus by delaying rival male courtship through guarding, first male A. melinus decreased the chance that the female would mate again. Guarding also reduced the proportion of progeny sired by a second mating male.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Behavioural Ecology
Objective Division:Environment
Objective Group:Control of Pests, Diseases and Exotic Species
Objective Field:Control of Plant Pests, Diseases and Exotic Species in Farmland, Arable Cropland and Permanent Cropland Environments
Author:Allen, GR (Associate Professor Geoff Allen)
ID Code:102684
Year Published:1994
Web of Science® Times Cited:44
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2015-09-03
Last Modified:2015-10-06
Downloads:0

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