ENVIRONMENTAL CONDITIONS AFFECT THE MAGNITUDE OF INBREEDING DEPRESSION IN SURVIVAL OF DARWIN'S FINCHES

@inproceedings{Keller2002ENVIRONMENTALCA,
  title={ENVIRONMENTAL CONDITIONS AFFECT THE MAGNITUDE OF INBREEDING DEPRESSION IN SURVIVAL OF DARWIN'S FINCHES},
  author={Lukas F. Keller and Peter R. Grant and Barbara Rosemary Grant and Kenneth Petren},
  booktitle={Evolution; international journal of organic evolution},
  year={2002}
}
Abstract Understanding the fitness consequences of inbreeding (inbreeding depression) is of importance to evolutionary and conservation biology. There is ample evidence for inbreeding depression in captivity, and data from wild populations are accumulating. However, we still lack a good quantitative understanding of inbreeding depression and what influences its magnitude in natural populations. Specifically, the relationship between the magnitude of inbreeding depression and environmental… 
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Highly Influential Citations
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202 Citations

The Environmental Dependence of Inbreeding Depression in a Wild Bird Population

It is suggested that inbreeding-by-environment interactions may be substantial in wild populations, when measured across relevant environmental contrasts, although their detection for single traits may require very large samples, or high rates of inbreeding.

Inbreeding and inbreeding depression of early life traits in a cooperative mammal

This research provides a rare investigation into inbreeding in a cooperative mammal, revealing high levels of inbreeding, considerable negative consequences and complex interactions with the social environment.

Is lack of evidence of inbreeding depression in a threatened New Zealand robin indicative of reduced genetic load?

Evidence presented here of low lethal equivalents and relatively high survival of both inbred and non‐inbred juveniles are consistent with a population that has undergone partial purging of its genetic load during historical population bottlenecks, one of the first studies of a wild population where weak inbreeding depression for juvenile survival appears to be associated with a prolonged bottleneck.

Effects of inbreeding and parental incubation on captive breeding success in Hawaiian crows

Sensitive males: inbreeding depression in an endangered bird

It is shown that inbreeding depresses offspring survival, male embryos are more inbred on average than female embryos, the effect of inbreeding depression is male-biased and this population has a substantial genetic load.

Limited inbreeding depression in a bottlenecked population is age but not environment dependent

It is found that the Stewart Island robin population is atypical in that inbreeding depression appears to be weak even under severe environmental conditions, and may be indicative that this bottlenecked population has either reduced genetic load or has fixed deleterious alleles.

INBREEDING AND INTERBREEDING IN DARWIN'S FINCHES

It is found that relative fitness of inbred finches is less than one in the 1991 cohorts of both species, and hybridization may enhance fitness to different degrees by counteracting the effects of inbreeding depression, by other additive and nonadditive genetic effects, and by producing phenotypes well suited to exploit particular ecological conditions.

Inbreeding depression along a life‐history continuum in the great tit

Analysis of the effects of close inbreeding, based on observations of mating between relatives, in a large, free‐living noninsular great tit (Parus major) population monitored over 41’years, shows that inbreeding depression acts independently at each life‐history stage in this population, and suggests that estimates of the fitness costs of inbreeding must focus on the entire life cycle.

Inbreeding and its avoidance in a wild bird population

This thesis demonstrates that inbreeding has deleterious effects on a wild population of birds, occurring throughout an individual’s life, and is of varying strength across environments, and shows that the variation in the strength of inbreeding depression varies across environments.

Severe inbreeding depression in collared flycatchers (Ficedula albicollis)

The results illustrate how severe inbreeding depression and considerable genetic load may exist in natural populations, but detecting them may require extensive long–term datasets.
...

References

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