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    Reproductive phenotype predicts adult bite-force performance in sex-reversed dragons (Pogona vitticeps )

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    Authors
    Jones, MEH
    Pistevos, JCA
    Cooper, N cc
    Lappin, AK
    Georges, A
    Hutchinson, MN
    Holleley, CE
    Issue date
    2020-02-14
    Submitted date
    2020-02-17
    Subject Terms
    Agamidae
    bite force
    lizard
    performance
    Pogona vitticeps
    scaling
    sex reversal
    sexual dimorphism
    
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    Abstract
    Sex‐related differences in morphology and behavior are well documented, but the relative contributions of genes and environment to these traits are less well understood. Species that undergo sex reversal, such as the central bearded dragon (Pogona vitticeps), offer an opportunity to better understand sexually dimorphic traits because sexual phenotypes can exist on different chromosomal backgrounds. Reproductively female dragons with a discordant sex chromosome complement (sex reversed), at least as juveniles, exhibit traits in common with males (e.g., longer tails and greater boldness). However, the impact of sex reversal on sexually dimorphic traits in adult dragons is unknown. Here, we investigate the effect of sex reversal on bite‐force performance, which may be important in resource acquisition (e.g., mates and/or food). We measured body size, head size, and bite force of the three sexual phenotypes in a colony of captive animals. Among adults, we found that males (ZZm) bite more forcefully than either chromosomally concordant females (ZWf) or sex‐reversed females (ZZf), and this difference is associated with having relatively larger head dimensions. Therefore, adult sex‐reversed females, despite apparently exhibiting male traits as juveniles, do not develop the larger head and enhanced bite force of adult male bearded dragons. This pattern is further illustrated in the full sample by a lack of positive allometry of bite force in sex‐reversed females that is observed in males. The results reveal a close association between reproductive phenotype and bite force performance, regardless of sex chromosome complement.
    Citation
    Jones, MEH, Pistevos, JCA, Cooper, N, et al. Reproductive phenotype predicts adult bite‐force performance in sex‐reversed dragons (Pogona vitticeps). J Exp Zool. 2020; 1– 12. https://doi.org/10.1002/jez.2353
    Publisher
    Wiley
    Journal
    Journal of Experimental Zoology Part A: Ecological and Integrative Physiology
    URI
    http://hdl.handle.net/10141/622643
    DOI
    10.1002/jez.2353
    Type
    Journal Article
    Item Description
    This is the peer reviewed version of the following article: Jones, MEH, Pistevos, JCA, Cooper, N, et al. Reproductive phenotype predicts adult bite‐force performance in sex‐reversed dragons (Pogona vitticeps). J Exp Zool. 2020; 1– 12. https://doi.org/10.1002/jez.2353, which has been published in final form at https://doi.org/10.1002/jez.2353. This article may be used for non-commercial purposes in accordance with Wiley Terms and Conditions for Use of Self-Archived Versions. The attached file is the final accepted manuscript version, you are advised to consult the publisher’s version if you wish to cite from it.
    ISSN
    2471-5638
    ae974a485f413a2113503eed53cd6c53
    10.1002/jez.2353
    Scopus Count
    Collections
    Life sciences

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