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The evolution of mutualism with modifiers.

Christopher G Quickfall1, James A R Marshall1,2

  • 1Department of Computer Science University of Sheffield Sheffield UK.

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Summary
This summary is machine-generated.

Evolutionary models show that costly interspecies donation can be suppressed or favored. Genomewide assortment can lead to intermediate donation levels, potentially benefiting the donating species indirectly.

Keywords:
altruismassortmentdonationfalsebeardgreenbeardsuppression

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Area of Science:

  • Evolutionary biology
  • Theoretical ecology
  • Behavioral ecology

Background:

  • Mutualisms are common but less theoretically studied than within-species social behaviors.
  • Previous models focused on unconditional pairwise interspecies interactions.

Purpose of the Study:

  • To extend models of interspecies social behavior to include selection for costly donation and donation-suppressing modifiers.
  • To investigate conditions favoring or disfavoring donation suppression.
  • To explore the role of assortment in the evolution of interspecies donation.

Main Methods:

  • Theoretical modeling of social behavior evolution.
  • Analysis of selection pressures on donation and modifier loci.
  • Examination of assortment effects at different genetic loci.

Main Results:

  • Assortment solely at the donation locus favors donation suppression, akin to within-species greenbeard traits.
  • Genomewide assortment with modifier loci can result in intermediate, species-specific donation levels.
  • Costly donation can evolve without suppression, explained by indirect fitness benefits via partner species.

Conclusions:

  • The evolution of costly interspecies donation is influenced by genetic assortment and modifier selection.
  • Indirect fitness benefits can drive the evolution of interspecies altruism.
  • Understanding these dynamics is crucial for assessing the stability and beneficiaries of social behavior between species.