Mother-offspring isotope fractionation in two species of placentatrophic sharks |
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| Authors: | Vaudo J J Matich P Heithaus M R |
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| Affiliation: | Marine Science Program, Department of Biological Sciences, Florida International University, North Miami, FL 33181, USA. jeremy.vaudo@fiu.edu |
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| 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 δ(15) N compared to their mothers (0·82 and 0·88‰, respectively), but fractionation of δ(13) C varied. Embryonic S. lewini were enriched (1·00‰) in δ(13) C while C. limbatus were depleted (0·27‰) relative to their mothers. |
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| Keywords: | elasmobranch isotopic variability maternal influence maternal provisioning |
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