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Evolution of mate-choice copying: a dynamic model

StÖhr1

  • 1Department of Zoology, Uppsala University, Sweden

Animal Behaviour
|December 16, 1998
PubMed
Summary

Mate-choice copying may evolve in young females who are inexperienced at assessing male quality. This strategy is favored when there are many experienced females and limited time for mating.

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Area of Science:

  • Behavioral Ecology
  • Evolutionary Biology
  • Animal Behavior

Background:

  • Mate-choice copying, where individuals copy the mating decisions of others, has been observed in several species.
  • Proposed explanations include reducing mate assessment costs and errors, particularly for inexperienced individuals.
  • Young females in species like guppies and black grouse are more likely to copy, suggesting a learning mechanism.

Purpose of the Study:

  • To investigate the evolutionary conditions favoring the emergence of mate-choice copying.
  • To model how mate-choice copying might evolve in a population of pure choosers.

Main Methods:

  • Developed a 2-year dynamic model simulating a population of guppies (Poecilia reticulata).
  • Introduced a mutant female capable of mate-choice copying during her first mating season.
  • Compared copying strategy against waiting to learn or relying solely on own mate assessment abilities.

Main Results:

  • Mate-choice copying increased with a higher proportion of experienced females and less time remaining in the mating season.
  • The evolution of copying was contingent on young females having poor discrimination skills and needing to learn male quality.
  • Male quality itself was less critical than sufficient variation for mate choice to be meaningful.

Conclusions:

  • Mate-choice copying can evolve as a strategy for inexperienced females to learn about male quality.
  • Time constraints are crucial for mate-choice copying to be advantageous over individual assessment.
  • The model supports the hypothesis that copying facilitates learning in young females facing mate selection.

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