Trait differences among discrete morphs of a color polymorphic lizard, Podarcis erhardii

Kinsey M. Brock*, Simon Baeckens, Colin M. Donihue, José Martín, Panayiotis Pafilis, Danielle L. Edwards

*Corresponding author for this work

    Research output: Contribution to journalArticlepeer-review

    18 Citations (Scopus)
    29 Downloads (Pure)


    Color polymorphism defies evolutionary expectations as striking phenotypic variation is maintained within a single species. Color and other traits mediate social interactions, and stable polymorphism within a population is hypothesized to be related to correlational selection of other phenotypic traits among color morphs. Here, we report on a previously unknown throat color polymorphism in the Aegean Wall Lizard (Podarcis erhardii) and examine morph-correlated differences in traits important to social behavior and communication: maximum bite force capacity and chemical signal profile. We find that both sexes of P. erhardii have three color morphs: orange, yellow, and white. Moreover, orange males are significantly larger and tend to bite harder than yellow and white males. Although the established color polymorphism only partially matches the observed intraspecific variation in chemical signal signatures, the chemical profile of the secretions of orange males is significantly divergent from that of white males. Our findings suggest that morph colors are related to differences in traits that are crucial for social interactions and competitive ability, illustrating the need to look beyond color when studying polymorphism evolution.

    Original languageEnglish
    Article numbere10284
    Pages (from-to)1-29
    Number of pages29
    Publication statusPublished - 5 Nov 2020

    Bibliographical note

    Copyright the Author(s) 2020. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.


    • Bite force
    • Chemical signals
    • Color polymorphism
    • Lizard
    • Podarcis erhardii
    • Traits


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