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Bateman's principle and immunity.

Jens Rolff1

  • 1Evolution and Behaviour, Department of Animal and Plant Sciences, University of Sheffield Sheffield S10 2TN, UK. jor@sheffield.ac.uk

Proceedings. Biological Sciences
|April 18, 2002
PubMed
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This study proposes a new hypothesis for sexual selection, suggesting females invest more in immunity than males due to higher reproductive costs. This challenges the immunocompetence handicap hypothesis by focusing on Bateman's principle rather than testosterone.

Area of Science:

  • Evolutionary biology
  • Sexual selection
  • Immunology

Background:

  • The immunocompetence handicap hypothesis (ICHH) suggests testosterone-mediated trade-offs influence parasite-mediated sexual selection.
  • ICHH has been supported by studies on invertebrates, despite being based on vertebrate hormones.
  • Existing research often overlooks alternative explanations for observed patterns.

Purpose of the Study:

  • To propose an alternative hypothesis for parasite-mediated sexual selection.
  • To explain findings supporting ICHH without relying on testosterone or complex biochemical feedback loops.
  • To highlight the role of Bateman's principle in immune dimorphism.

Main Methods:

  • Review and reinterpretation of existing studies, primarily on insects.

Related Experiment Videos

  • Application of Bateman's principle to predict immune investment differences between sexes.
  • Analysis of how mating systems and genetic correlations influence immune dimorphism.

    • Main Results:

    • An alternative hypothesis is presented, positing greater female investment in immunity.
    • This hypothesis explains observed patterns without invoking testosterone-dependent mechanisms.
    • Predicted immune dimorphism is linked to reproductive effort and mating systems.

    Conclusions:

    • Bateman's principle provides a robust framework for understanding sex-based differences in immunity.
    • Female-biased immune investment is predicted due to higher reproductive costs.
    • Invertebrate models offer valuable insights into innate immunity and sexual selection.