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Good genes, oxidative stress and condition-dependent sexual signals

Författare

Summary, in English

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.

Publiceringsår

1999

Språk

Engelska

Sidor

1-12

Publikation/Tidskrift/Serie

Royal Society of London. Proceedings B. Biological Sciences

Volym

266

Issue

1

Dokumenttyp

Artikel i tidskrift

Förlag

Royal Society Publishing

Ämne

  • Biological Sciences

Nyckelord

  • 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

Status

Published

Projekt

  • Immunoecology

Forskningsgrupp

  • Molecular Ecology and Evolution Lab

ISBN/ISSN/Övrigt

  • ISSN: 1471-2954