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Interacting Phenotypes and the Evolutionary Process. II. Selection Resulting from Social Interactions.

Jason B Wolf, Edmund D Brodie Iii, Allen J Moore

    The American Naturalist
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    PubMed
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    This summary is machine-generated.

    Social selection drives evolutionary dynamics when individual fitness varies due to interactions. This occurs when traits covary with the social environment, creating a measurable force of selection on interacting phenotypes.

    Keywords:
    Hamilton's ruleindirect genetic effectskin selectionquantitative geneticssocial selection

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    Area of Science:

    • Evolutionary biology
    • Behavioral ecology
    • Quantitative genetics

    Background:

    • Social selection, distinct from natural selection, influences evolutionary dynamics.
    • The force and conditions of social selection remain understudied.
    • Theories predict social selection can lead to rapid evolution and altruism.

    Purpose of the Study:

    • To present a novel model for quantifying social selection.
    • To evaluate social selection independently of the genetics of interacting phenotypes.
    • To identify conditions promoting social selection.

    Main Methods:

    • Developed a covariance model analogous to other selection models.
    • Defined social selection as fitness variation due to interactions covarying with traits.
    • Proposed using partial regression to partition social selection from natural selection.

    Main Results:

    • Social selection opportunity exists when fitness varies with conspecific interactions.
    • Interacting phenotype covariance is crucial for social selection.
    • Factors like nonrandom interactions and indirect genetic effects contribute to this covariance.

    Conclusions:

    • Social selection is a measurable force driven by the covariance of interacting phenotypes.
    • The model allows empirical partitioning of social and natural selection.
    • This framework offers insights into the evolution of social behaviors.