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Mandibular Layering in Delphinapterus leucas and Age Determination

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Abstract

LAWS1 investigated mandibular periosteal layers as an aid to ageing the Sperm whale Physeter catodon. Continued studies of P. catodon indicate that mandibular layers and tooth layers occur in equal numbers2, and it has been postulated that two tooth layers are deposited annually3. Two tooth and one mandibular layer in Delphinus delphis are annual4.

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References

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Authors and Affiliations

  1. Department of Biology, Dalhousie University, Halifax, Nova Scotia

    PAUL F. BRODIE

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  1. PAUL F. BRODIE
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BRODIE, P. Mandibular Layering in Delphinapterus leucas and Age Determination. Nature 221, 956–958 (1969). https://doi.org/10.1038/221956a0

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  • DOI: https://doi.org/10.1038/221956a0

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