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Coercive mating, fluctuating asymmetry and male mating success in the dung fly Sepsis cynipsea


Allen, GR and Simmons, LW, Coercive mating, fluctuating asymmetry and male mating success in the dung fly Sepsis cynipsea, Animal Behaviour, 52, (4) pp. 737-741. ISSN 0003-3472 (1996) [Refereed Article]

Copyright Statement

Copyright 1996 The Association for the Study of Animal Behaviour

DOI: doi:10.1006/anbe.1996.0218


Males of the dung flySepsis cynipsea (L.) (Diptera: Sepsidae) mate guard before copulation by mounting the female's dorsum upon her arrival at the dung. After completing oviposition, females walk off the dung and vigorously shake to attempt to dislodge the guarding male. Only males that succeed in remaining on the female's dorsum will establish genital contact and copulate. Males are smaller than females, and engage wing clamps (specially modified areas on the femur and tibia of each foreleg) to grip the female's wing bases during guarding. The foretibiae of males and females collected at three phases of pairing (prior to struggling, during struggling and in copula) were measured. No differences in the foretibia size of either males or females across the three phases were found. However, the absolute fluctuating asymmetry of the foretibiae of males differed significantly between phases. On average, males paired in copula were the most symmetrical whilst those paired prior to struggling were the least symmetrical. It was concluded that males with more symmetrical foretibiae are indirectly selected as mates by females because of their better competitive ability to grip the female's wing bases and thereby remain on the dorsum of a struggling female during guarding.

Item Details

Item Type:Refereed Article
Research Division:Biological Sciences
Research Group:Ecology
Research Field:Behavioural ecology
Objective Division:Expanding Knowledge
Objective Group:Expanding knowledge
Objective Field:Expanding knowledge in the biological sciences
UTAS Author:Allen, GR (Associate Professor Geoff Allen)
ID Code:102678
Year Published:1996
Web of Science® Times Cited:68
Deposited By:Tasmanian Institute of Agriculture
Deposited On:2015-09-03
Last Modified:2015-10-06

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