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Mother–offspring isotope fractionation in two species of placentatrophic sharks

Authors

  • J. J. Vaudo,

    Corresponding author
    1. Marine Science Program, Department of Biological Sciences, Florida International University, North Miami, FL 33181, U.S.A.
      Tel.: +1 305 919 4263; email: jeremy.vaudo@fiu.edu
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  • P. Matich,

    1. Marine Science Program, Department of Biological Sciences, Florida International University, North Miami, FL 33181, U.S.A.
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  • M. R. Heithaus

    1. Marine Science Program, Department of Biological Sciences, Florida International University, North Miami, FL 33181, U.S.A.
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Tel.: +1 305 919 4263; email: jeremy.vaudo@fiu.edu

Abstract

Stable-isotope values of a scalloped hammerhead Sphyrna lewini and blacktip shark Carcharhinus limbatus and their respective embryos were analysed. Embryos of both species were enriched in δ15N compared to their mothers (0·82 and 0·88‰, respectively), but fractionation of δ13C varied. Embryonic S. lewini were enriched (1·00‰) in δ13C while C. limbatus were depleted (0·27‰) relative to their mothers.

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