| Trophic inferences of blue shark (Prionace glauca) in the Mexican Pacific from stable isotope analysis in teeth. | |
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MedLine Citation:
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PMID: 22693119 Owner: NLM Status: In-Data-Review |
Abstract/OtherAbstract:
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RATIONALE: Isotopic analysis of biogenic tissues such as teeth of elasmobranchs has been well recognized as an important method to interpret present and past environmental conditions. However, few studies on shark teeth have focused their attention on making trophic inferences or reconstruction of diet. METHODS: We analyzed the carbon (δ(13) C) and nitrogen (δ(15) N) isotope composition of the tooth crown and root from blue sharks Prionace glauca caught in southern Baja California using a continuous-flow system by means of an elemental analyzer combined with a Delta Plus XL mass spectrometer, to describe their feeding ecology, considering sex and maturity stage. RESULTS: Significant differences in δ(13) C values for tooth root were found between immature and mature males, with depleted values of (13) C in immature individuals. No statistical differences were found between maturity stages in females for both the C and N isotopes in any part of the tooth, which suggests that females were consuming the same prey in the same area. In addition, we observed significant differences in δ(15) N values between the tooth crown and root. CONCLUSIONS: Isotopic analysis in the tooth crown (dentin) and root may represent a new tool to describe the feeding ecology of different species of elasmobranchs, showing dietary change over a short timescale. Copyright © 2012 John Wiley & Sons, Ltd. |
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Authors:
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Carlos J Polo-Silva; Felipe Galván-Magaña; Antonio Delgado-Huertas |
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Publication Detail:
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Type: Journal Article |
Journal Detail:
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Title: Rapid communications in mass spectrometry : RCM Volume: 26 ISSN: 1097-0231 ISO Abbreviation: Rapid Commun. Mass Spectrom. Publication Date: 2012 Jul |
Date Detail:
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Created Date: 2012-06-13 Completed Date: - Revised Date: - |
Medline Journal Info:
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Nlm Unique ID: 8802365 Medline TA: Rapid Commun Mass Spectrom Country: England |
Other Details:
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Languages: eng Pagination: 1631-8 Citation Subset: IM |
Copyright Information:
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Copyright © 2012 John Wiley & Sons, Ltd. |
Affiliation:
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Posgrado en Ciencias del Mar y Limnología, Universidad Nacional Autónoma de México, Apdo. Postal 70-305 Ciudad Universitaria, 04510, México, D.F., México. |
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From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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