Sexual selection as a side-effect of sexual conflict in the seaweed fly,Coelopa ursina(Diptera: Coelopidae)

Crean, Caroline S.; Gilburn, Andre S.

doi:10.1006/anbe.1998.0932

Cited by 58 publications

(55 citation statements)

References 34 publications

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“…Nevertheless, it is quite possible that SAC played a role at early stages in the evolution of the clamping structures of male sepsids. Energetic female shaking behavior that could dislodge males is widespread in sepsids (Eberhard 2005;Ingram et al 2008;Parker 1972;Ward 1983), and also in other related flies in which the male's front legs are not modified (Crean and Gilburn 1998;Eberhard 2000). Shaking may have originally evolved in sepsids due to male-inflicted losses to females when males began to ride them for long periods at oviposition sites; a female with a riding male is probably less able to avoid predators.…”

Section: Conclusion Regarding Cfc and Sacmentioning

confidence: 99%

Evolution of genitalia: theories, evidence, and new directions

2009

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Many hypotheses have been proposed to explain why male intromittent genitalia consistently tend to diverge more rapidly than other body traits of the same individuals in a wide range of animal taxa. Currently the two most popular involve sexual selection: sexually antagonistic coevolution (SAC) and cryptic female choice (CFC). A review of the most extensive attempts to discriminate between these two hypotheses indicates that SAC is not likely to have played a major role in explaining this pattern of genital evolution. Promising lines for future, more direct tests of CFC include experimental modification of male genital form and female sensory abilities, analysis of possible male-female dialogues during copulation, and direct observations of genital behavior.

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Section: Conclusion Regarding Cfc and Sacmentioning

confidence: 99%

Evolution of genitalia: theories, evidence, and new directions

2009

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“…Variation in the ability of females to reject males of different sizes results in sexual selection for large male size (Crean and Gilburn, 1998;Crean et al, 2000). Male mate choice also operates on the basis of female fecundity (Pitafi et al, 1990) and longevity (Dunn et al, 2001).…”

Section: Introductionmentioning

confidence: 99%

“…Several studies have failed to find evidence of precopulatory female mate choice in order to increase production of heterokaryotypic offspring (Gilburn et al, 1992;Crean and Gilburn, 1998;Crean et al, 2000). Furthermore, the karyotype of a female does not influence whether or not a male will attempt to mate with her (Gilburn, unpublished data), thus disassortative mating also does not occur via male mate choice.…”

Section: Introductionmentioning

confidence: 99%

“…Furthermore, the karyotype of a female does not influence whether or not a male will attempt to mate with her (Gilburn, unpublished data), thus disassortative mating also does not occur via male mate choice. In fact, precopulatory sexual selection appears to occur as a side effect of sexual conflict with large males gaining an advantage through their greater ability to withstand violent female rejection responses (Gilburn et al, 1992;Crean and Gilburn, 1998;Crean et al, 2000). However, a previous study investigating paternity of wild flies suggested the production of an excess of heterokaryotypic offspring (Day and Butlin, 1987).…”

Section: Introductionmentioning

confidence: 99%

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The effect of an inversion system and the time interval between matings on postcopulatory sexual selection in the seaweed fly, Coelopa frigida

Blyth

Gilburn

2005

Heredity

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The seaweed fly, Coelopa frigida, exhibits LMSP. A large chromosomal inversion system affects many traits including egg-to-adult viability via heterosis. Consequently, there is also considerable potential for cryptic female mate choice to operate on the basis of sperm karyotype. Here, we investigated the effect of time interval and chromosomal inversion karyotype on postcopulatory sexual selection. Homokaryotypic females were mated with a male of the same and a male of the opposite homokaryotype. The order of the matings was varied so cryptic female mate choice could operate either in concert or antagonistically with LMSP. LMSP was found when there was a 24 h time interval between matings, irrespective of the order in which the males were mated. However, when the males were mated in quick succession the order of mating was important. When LMSP and cryptic female mate choice work in concert a high level of LMSP was found. However, when the male of opposite homokaryotype mated first, then first male sperm precedence was observed. This suggests that polyandrous females might be able to bias paternity but only when matings occur in quick succession. Consequently, population density is likely to affect the operation of postcopulatory sexual selection. Heredity (2005) 95, 174-178.

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“…Large 61 male coelopids gain a mating advantage in all coelopids so far studied 62 (Crean et al, 2000) and this appears to occur as a result of their superior 63 ability to withstand female rejection for longer (Crean and Gilburn, 1998).…”

mentioning

confidence: 99%

Extreme Promiscuity in a Mating System Dominated by Sexual Conflict

Blyth

Gilburn

2006

J Insect Behav

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Coelopids live in wrack beds consisting of seaweed washed up on beaches. Their mating system is characterized by sexual conflict and convenience polyandry, with females resisting male mating attempts. We estimated the level of harassment by males and the success rate of rejection by females collected from a high density wild population. Males mounted a female every 8.41 min. Of these mounts 35% resulted in copulation. This suggests that females could be mated up to 5 times every 2 h. Females typically live for 3 weeks, and thus, could mate with hundreds of males during their lifetime. We found a 50:50 sex ratio throughout the wrack bed revealing that females do not avoid male harassment by leaving the wrack bed when not ovipositing.

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Sexual selection as a side-effect of sexual conflict in the seaweed fly,Coelopa ursina(Diptera: Coelopidae)

Cited by 58 publications

References 34 publications

Evolution of genitalia: theories, evidence, and new directions

Evolution of genitalia: theories, evidence, and new directions

The effect of an inversion system and the time interval between matings on postcopulatory sexual selection in the seaweed fly, Coelopa frigida

Extreme Promiscuity in a Mating System Dominated by Sexual Conflict

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