Different rates of development associated with the alcohol dehydrogenase locus in the seaweed fly, Coelopa frigida

Day, Thomas H.; Dobson, T.; Hillier, P. C.; Parkin, David T.; Clarke, Bryan

doi:10.1038/hdy.1980.29

Cited by 28 publications

(16 citation statements)

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“…Seaweed beds were sampled at random times in their life span, which is principally determined by the cycle of spring tides and by gales (Dobson, 1974a). The chromosome I inversion is known to influence development time (Day et a!., 1980) and so there is a very real risk of biased sampling. We attempted to reduce this bias by collecting from beds containing only larvae-that is before pupation had started.…”

Section: Methodsmentioning

confidence: 99%

“…Inversion frequencies in natural populations strongly suggest that the polymorphism is maintained by selection, and laboratory experiments indicate that at least three types of selection may operate: heterokaryotypic advantage in egg to adult viability (Butlin et a!., 1984), variation in development time (Day et a!., 1980), and sexual selection (Butlin et a!., 1982b, Day et a!., 1987. This is therefore a promising system in which to study the connection between environmental parameters and inversion frequencies.…”

Section: Introductionmentioning

confidence: 99%

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Environmental correlates of inversion frequencies in natural populations of seaweed flies (Coelopa frigida)

Butlin¹,

Day

1989

Heredity

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Two populations of seaweed flies (Coelopa frigida) from the north-east coast of England were sampled at approximately monthly intervals. Single samples were also collected from populations on the south coast. The allele and genotype frequencies at the alcohol dehydrogenase locus, known to be associated with the large a/13 chromosomal inversion, were determined for each of the 34 samples.Aspects of the habitats were quantified at the time of sampling, as were 12 variables extracted from meteorological data. The genetic, ecological and climatic data are used to test predictions deriving from laboratory experiments and from previous, smaller scale, sampling programmes. There was an excess of heterokaryotypes over Hardy-Weinberg expectations which was stable over time. While the frequencies were close to the predicted equilibrium values, the rate of return following departures from the equilibrium was more rapid than predicted from the operation of heterokaryotypic advantage alone. Estimates of the effective population size were very much lower than census estimates. Karyotype frequencies cycled seasonally and were associated with both temperature and the incidence of gales. The interactions of ecological and life-historical factors with the observed genetical variation are discussed.

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Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Environmental correlates of inversion frequencies in natural populations of seaweed flies (Coelopa frigida)

Butlin¹,

Day

1989

Heredity

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“…In addition, the experiment can be criticised on the grounds that the males collected at the time of sampling were not necessarily representative of those available to be fathers at the time of mating. Differences in the longevity of males (Butlin and Day, 1985), and in particular, differences in the hatch sequence of the various genotypes (Day et aL, 1980), result in genotype frequencies changing with time. Multiple insemination and the incorrect inference of the father's genotype (due to the limited number of progeny being scored) are further potential sources of inaccuracy.…”

Section: Pilot Experimentsmentioning

confidence: 99%

Differential mating success in populations of seaweed flies (Coelopa frigida)

et al. 1987

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The reproductive success of seaweed flies (Coelopa frigida) was studied in natural populations. The sizes of females, both mothers and those not producing eggs, as well as of the males available to be fathers, were estimated from their wing lengths. The animals were also classified for their genotype at the alcohol dehydrogenase (Adh) locus-a polymorphic locus tightly associated with a large chromosomal inversion. The fathers' genotypes were inferred from the genotypes of the mother and her offspring. Males of different Adh genotypes had different reproductive success. Reproductive success of genotypes was negatively correlated with the mean sizes of males. Differences in the reproductive success of females could be accounted for by their differential egg laying capacity, and is probably not a consequence of their mating behaviour. The incidence of progeny with mixed paternity varied from 20 per cent initially, to about 65 per cent when the animals had been mating for 6 days. It appears from previous work that large males are more successful in laboratory trials, yet under natural conditions genotypes associated with large male size have low mating success. Ways of reconciling these results and their relevance to understanding the inversion polymorphisms are discussed.

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“…There are two forms of the inversion, known as a and b. The aa homokaryotypes are large, develop slowly (Day et al, 1980) and suffer relatively high levels of egg-to-adult mortality (Butlin et al, 1984;Butlin and Day, 1985). The bb homokaryotypes are small, develop quickly and suffer intermediate levels of egg-to-adult mortality.…”

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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Different rates of development associated with the alcohol dehydrogenase locus in the seaweed fly, Coelopa frigida

Cited by 28 publications

References 4 publications

Environmental correlates of inversion frequencies in natural populations of seaweed flies (Coelopa frigida)

Environmental correlates of inversion frequencies in natural populations of seaweed flies (Coelopa frigida)

Differential mating success in populations of seaweed flies (Coelopa frigida)

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

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