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Evolution of risk-taking during conspicuous mating displays.

Leif Engqvist1, Nils Cordes, Klaus Reinhold

  • 1Evolutionary Biology, Bielefeld University, Bielefeld, Germany; Behavioural Ecology, Institute of Ecology and Evolution, University of Bern, Bern, Switzerland. leif.engqvist@iee.unibe.ch.

Evolution; International Journal of Organic Evolution
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Male animals with attractive traits must balance signal conspicuousness with predation risk. Male competition can drive opposing risk-taking strategies, challenging the asset-protection principle.

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Area of Science:

  • Evolutionary biology
  • Behavioral ecology

Background:

  • Sexual selection favors conspicuous male traits for female attraction.
  • These traits can increase predation risk, necessitating a balance between signaling and survival.

Purpose of the Study:

  • To develop a theoretical model of optimal signaling and risk-taking behavior in males.
  • To investigate how male attractiveness influences risk-taking strategies under predation pressure.

Main Methods:

  • Theoretical modeling of male signaling and risk-taking.
  • Analysis of factors influencing male behavior, including mortality rates and signaling costs.

Main Results:

  • More attractive males are predicted to behave more cautiously, but this can change with other factors.
  • Male competition creates feedback loops, driving opposing selection pressures on risk-taking.
  • The asset-protection principle may be violated; attractive males' caution could explain their viability.

Conclusions:

  • Male attractiveness influences risk-taking strategies, with competition creating complex selection dynamics.
  • The study offers an alternative explanation for the link between ornamentation and viability, beyond the handicap principle.