Trophic inferences of blue shark (Prionace glauca) in the Mexican Pacific from stable isotope analysis in teeth

Carlos J. Polo-Silva, Felipe Galván-Magaña, Antonio Delgado-Huertas

Research output: Contribution to journalArticleResearchpeer-review

8 Citations (Scopus)

Abstract

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 13C) and nitrogen (δ 15N) 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 13C values for tooth root were found between immature and mature males, with depleted values of 13C 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 15N 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. © 2012 John Wiley & Sons, Ltd.
Original languageAmerican English
Pages (from-to)1631-1638
Number of pages1467
JournalRapid Communications in Mass Spectrometry
DOIs
StatePublished - 30 Jul 2012
Externally publishedYes

Fingerprint

Ecology
Isotopes
Mass spectrometers
Nutrition
Nitrogen
Carbon
Tissue
Chemical analysis

Cite this

@article{e6135c6ba6af4065bdb24581ab2f3087,
title = "Trophic inferences of blue shark (Prionace glauca) in the Mexican Pacific from stable isotope analysis in teeth",
abstract = "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 13C) and nitrogen (δ 15N) 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 13C values for tooth root were found between immature and mature males, with depleted values of 13C 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 15N 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. {\circledC} 2012 John Wiley & Sons, Ltd.",
author = "Polo-Silva, {Carlos J.} and Felipe Galv{\'a}n-Maga{\~n}a and Antonio Delgado-Huertas",
year = "2012",
month = "7",
day = "30",
doi = "10.1002/rcm.6275",
language = "American English",
pages = "1631--1638",
journal = "Rapid Communications in Mass Spectrometry",
issn = "0951-4198",
publisher = "John Wiley and Sons Ltd",

}

Trophic inferences of blue shark (Prionace glauca) in the Mexican Pacific from stable isotope analysis in teeth. / Polo-Silva, Carlos J.; Galván-Magaña, Felipe; Delgado-Huertas, Antonio.

In: Rapid Communications in Mass Spectrometry, 30.07.2012, p. 1631-1638.

Research output: Contribution to journalArticleResearchpeer-review

TY - JOUR

T1 - Trophic inferences of blue shark (Prionace glauca) in the Mexican Pacific from stable isotope analysis in teeth

AU - Polo-Silva, Carlos J.

AU - Galván-Magaña, Felipe

AU - Delgado-Huertas, Antonio

PY - 2012/7/30

Y1 - 2012/7/30

N2 - 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 13C) and nitrogen (δ 15N) 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 13C values for tooth root were found between immature and mature males, with depleted values of 13C 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 15N 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. © 2012 John Wiley & Sons, Ltd.

AB - 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 13C) and nitrogen (δ 15N) 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 13C values for tooth root were found between immature and mature males, with depleted values of 13C 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 15N 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. © 2012 John Wiley & Sons, Ltd.

UR - https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=84862732735&origin=inward

UR - https://www.scopus.com/inward/citedby.uri?partnerID=HzOxMe3b&scp=84862732735&origin=inward

U2 - 10.1002/rcm.6275

DO - 10.1002/rcm.6275

M3 - Article

SP - 1631

EP - 1638

JO - Rapid Communications in Mass Spectrometry

JF - Rapid Communications in Mass Spectrometry

SN - 0951-4198

ER -