Adult size, longevity and fecundity in the seaweed fly, Coelopa frigida

Butlin, Roger K.; Day, Thomas H.

doi:10.1038/hdy.1985.14

Cited by 54 publications

(51 citation statements)

References 3 publications

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“…However, large size is also associated with increased longevity, there being a roughly twofold difference between aa and fl/3 males (Butlin & Day, 1985).…”

Section: Discussionmentioning

confidence: 99%

Female mating preference for large size in Coelopa frigida (seaweed fly)

1992

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Female mating preferences were studied in the seaweed fly, Coelopa frigida. The female acceptance/rejection response to the intial mount by randomly chosen males was scored and male mating success determined by the subsequent production of progeny. The sizes of males and females, as well as their genotypes at the alcohol dehydrogenase (Adh) locus, were determined. Both adult size and the Ad/i locus are known to be strongly associated with a large chromosomal inversion system. Stepwise multiple regression analyses revealed no association between male mating success and male Ad/i genotype, but a stong association was found with male size. Female mating preferences appear to exert strong directional selection in favour of large males. There was also an association between female acceptance rate and female Adh genotype, which is likely to be a consequence of inversion karyotype rather than the Adh locus. It is suggested that the discrepancy between the mean size of males in natural populations and the preferred male size indicates that the forces of natural (viability) selection and sexual selection act in opposition.

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“…However, large size is also associated with increased longevity, there being a roughly twofold difference between aa and fl/3 males (Butlin & Day, 1985).…”

Section: Discussionmentioning

confidence: 99%

Female mating preference for large size in Coelopa frigida (seaweed fly)

1992

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“…Populations also exhibit positively assortative mating with respect to size . In addition there are differences associated with size in adult fecundity and longevity (Butlin and Day, 1985).…”

Section: Introductionmentioning

confidence: 99%

Adult size and mate choice in seaweed flies (Coelopa frigida)

et al. 1990

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The willingness to mate of pairs of seaweed flies (Coelopa frigida) was measured using a stock known not to exhibit female mate choice with respect to a chromosomal inversion. Mating success was strongly correlated with the size of the female, but not at all with male size. Mating success was not associated with the size difference between the male and female in a pair, except when the male was considerably larger than the female, when mating success was reduced. The components of mating behaviour were quantified during slow-playback of video recordings. Both the mount rate and the proportion of mounts ending in female rejection were positively correlated with female size, and a strong negative correlation was found between female size and the rate of male dismounting. This lower rate of dismounting from large females may be the consequence of a male preference for large females and could account for their greater mating success. The higher rejection rate exhibited by large females, particularly of males much smaller than themselves, may be the manifestation of female choice for large males. Both sexes appear to prefer large mates. In trials involving many animals male mate choice is either weaker or is masked by other effects. The evolutionary significance of male mate choice and its interactions with other components of mating behaviour are discussed.

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“…This chromosomal rearrangement, which involves over 10 per cent of the genome (Aziz, 1975;Day et a!., 1982), has profound influences on the flies' biology. The two alternative forms (a and /3) are associated with differences in development time (Day et a!., 1980), adult size (Butlin et al, 1982b), adult longevity (Butlin and Day. 1985) and larval survival (Butlin et aL, 1984).…”

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confidence: 99%