Female mate choice for large males in several species of seaweed fly (Diptera: Coelopidae)

Crean, Caroline S.; Dunn, Derek W.; Day, Thomas H.; Gilburn, Andre S.

doi:10.1006/anbe.1999.1268

Cited by 40 publications

(60 citation statements)

References 43 publications

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“…We also determined their wing length using a graticule unit under the same level of magniÞcation. Wing length has been used as the standard index of relative size in numerous previous studies of coelopids (Gilburn et al 1992;Day 1994, 1999;Dunn et al 1999Dunn et al , 2002Crean et al 2000;Edward and Gilburn 2007;Meader and Gilburn 2008).…”

Section: Methodsmentioning

confidence: 99%

“…The mating behavior of the other common British seaweed ßy, Coelopa pilipes, has also been studied (Crean et al 2000, Dunn et al 2002, Edward and Gilburn 2007, albeit to a lesser extent. The two species occur on beaches on which deposits of seaweed, known as wrack beds, are washed up (Dobson 1974), often occurring sympatrically.…”

mentioning

confidence: 99%

“…Both C. frigida and C. pilipes are sexually dimorphic, with males being more variable in size and possessing hairier legs in both species. Sexual selection favors large male size in both species (Gilburn et al 1992, Crean et al 2000 because large males are better at withstanding female resistance during premating struggles (Crean et al 2000).…”

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confidence: 99%

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Sex-Biased Phoretic Mite Load on Two Seaweed Flies:Coelopa frigidaandCoelopa pilipes

2009

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Two hypotheses explain male-biased parasitism. Physiological costs of male sexually selected characteristics can reduce immunocompetence. Alternatively, ecological differences could generate male-biased parasitism. One method of comparing the importance of the two theories is to investigate patterns of phoresy, which are only likely to be generated by ecological rather than immunological differences between the sexes. Here we studied the pattern of phoresy of the mite, Thinoseius fucicola, on two species of seaweed ßy hosts, Coelopa frigida and Coelopa pilipes. We found a highly male-biased pattern of phoresy of T. fucicola on both species. These are the Þrst reported instances of sex-biased phoresy in a solely phoretic parasite. We also show the Þrst two cases of size-biased phoresy. We suggest that ecological factors, particularly, male mate searching, generated male biased patterns of phoresy. We highlight the potential importance of studies of phoresy in determining the relative roles of the immunocompetence and ecological theories in generating male-biased parasitism. We suggest that more studies of patterns of phoresy are carried out to allow detailed comparisons with patterns of parasitism.

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Section: Methodsmentioning

confidence: 99%

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confidence: 99%

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Sex-Biased Phoretic Mite Load on Two Seaweed Flies:Coelopa frigidaandCoelopa pilipes

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%

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).…”

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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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Female mate choice for large males in several species of seaweed fly (Diptera: Coelopidae)

Cited by 40 publications

References 43 publications

Sex-Biased Phoretic Mite Load on Two Seaweed Flies:Coelopa frigidaandCoelopa pilipes

Sex-Biased Phoretic Mite Load on Two Seaweed Flies:Coelopa frigidaandCoelopa pilipes

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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