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    Dental microwear texture analysis as a tool for dietary discrimination in elasmobranchs

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    Authors
    McLennan, Laura J.
    Purnell, Mark A.
    Affiliation
    University of Leicester
    University of Derby
    Issue Date
    2021-01-28
    
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    Abstract
    As abundant and widespread predators, elasmobranchs play influential roles in food-web dynamics of marine communities. Clearly, these trophic interactions have significant implications for fisheries management and marine conservation, yet elasmobranch diet is relatively understudied; for the majority of species little or no quantitative dietary data exist. This reflects the difficulties of direct observation of feeding and stomach contents analysis in wild elasmobranchs. Here, by quantifying the 3D surface textures that develop on tooth surfaces as a consequence of feeding, we show that tooth microwear varies with diet in elasmobranchs, providing a new tool for dietary analysis. The technique can be applied to small samples and individuals with no gut contents, and thus offers a way to reduce the impact on wild elasmobranch populations of analysing their dietary ecology, especially relevant in conservation of endangered species. Furthermore, because microwear accumulates over longer periods of time, analysis of texture overcomes the ‘snapshot bias’ of stomach contents analysis. Microwear texture analysis has the potential to be a powerful tool, complementing existing techniques such as stable isotope analysis, for dietary analysis in living and extinct elasmobranchs.
    Citation
    McLennan, L.J., and Purnell, M.A. (2021). ‘Dental microwear texture analysis as a tool for dietary discrimination in elasmobranchs’. Scientific Reports, 11, 2444, pp. 1-9.
    Publisher
    Springer Science and Business Media LLC
    Journal
    Scientific Reports
    URI
    http://hdl.handle.net/10545/625659
    DOI
    10.1038/s41598-021-81258-9
    Additional Links
    https://www.nature.com/articles/s41598-021-81258-9
    Type
    Article
    Language
    en
    EISSN
    2045-2322
    ae974a485f413a2113503eed53cd6c53
    10.1038/s41598-021-81258-9
    Scopus Count
    Collections
    Environmental Sustainability Research Centre

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