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Multiple Sexual Ornaments Coevolve with Multiple Mating Preferences.

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    Female guppies may have separate preferences for male ornaments, suggesting distinct evolutionary paths for each trait. This research indicates that female preferences for orange and black coloration are independent evolutionary characters.

    Keywords:
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    Area of Science:

    • Evolutionary Biology
    • Behavioral Ecology
    • Genetics

    Background:

    • Sexual selection often drives the evolution of male ornaments and female preferences.
    • It remains debated whether multiple male ornaments evolve due to a single female preference or independent preferences for each ornament.

    Purpose of the Study:

    • To investigate if female preferences for different male ornaments (orange and black coloration) in guppies represent a single or multiple evolutionary characters.
    • To determine the genetic correlation between male ornaments and female preferences.

    Main Methods:

    • Direct selection was applied to increase and decrease orange and black coloration in male guppies (Poecilia reticulata).
    • Female preference responses to these selected ornaments were measured to infer the nature of the preferences.

    Main Results:

    • Female preferences for both orange and black coloration responded independently to the artificial selection on the respective male ornaments.
    • The pattern of response suggests that female preferences for orange and black are distinct evolutionary traits.

    Conclusions:

    • Female preferences for different visual ornaments in guppies are likely separate evolutionary characters.
    • Each female preference appears to be genetically correlated with its corresponding male ornament, supporting independent coevolution.