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Good genes, oxidative stress and condition-dependent sexual signals

Publiceringsår: 1999
Språk: Engelska
Sidor: 1-12
Publikation/Tidskrift/Serie: Proceedings of the Royal Society of London Series B-Biological Sciences
Volym: 266
Nummer: 1
Dokumenttyp: Artikel
Förlag: Royal Society Publishing

Sammanfattning

The immune and the detoxication systems of animals are characterized by allelic polymorphisms, which underlie individual differences in ability to combat assaults from pathogens and toxic compounds. Previous studies have shown that females may improve offspring survival by selecting mates on the basis of sexual ornaments and signals that honestly reveal health. In many cases the expression of these ornaments appears to be particularly sensitive to oxidative stress. Activated immune and detoxication systems often generate oxidative stress by an extensive production of reactive metabolites and free radicals. Given that tolerance or resistance to toxic compounds and pathogens can be inherited, female choice should promote the evolution of male ornaments that reliably reveal the status of the bearers' level of oxidative stress. Hence, oxidative stress may be one important agent linking the expression of sexual ornaments to genetic variation in fitness-related traits, thus promoting the evolution of female mate choice and male sexual ornamentation, a controversial issue in evolutionary biology ever since Darwin.

Disputation

Nyckelord

  • Biology and Life Sciences
  • drosophila-melanogaster
  • oxidative stress
  • allelic variation
  • major histocompatibility complex
  • sexual ornaments
  • great reed warbler
  • low-density-lipoprotein
  • complex
  • major histocompatibility
  • fragment-length-polymorphisms
  • s-transferase-theta
  • hyaluronic-acid
  • song repertoire
  • detoxication
  • alcohol-dehydrogenase
  • food-storing bird

Övriga

Published
  • Costs of the immune system and maternal effects
Yes
  • Molecular Ecology and Evolution Lab
  • ISSN: 0962-8452

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