FOCUS: Effect of diet and protein source on carbon stable isotope ratios in collagen: Follow up to Warinner and Tuross (2009)

A. W. Froehle, Corina M Kellner, M. J. Schoeninger

Research output: Contribution to journalArticle

113 Scopus citations


We analyzed carbon stable isotope data from bone collagen of animals consuming varied experimental diets, including recently published data from Warinner and Tuross [Warinner, C., Tuross, N., 2009. Alkaline cooking and stable isotope tissue-diet spacing in swine: archaeological implications. Journal of Archaeological Science 36, 1690-1697; this journal]. Comparing regression lines for the relationship between collagen and diet δ13C, we show that protein source, and not physiology, explains the apparent taxonomic difference between swine and rodents reported in that paper. Our results reveal a complex relationship between whole diet and dietary protein in determining collagen δ13C values, such that in many cases, collagen alone may not provide reliable reconstructions of paleodiet. We advocate the simultaneous use of both collagen and apatite δ13C, whenever possible, to assess the diets of prehistoric peoples.

Original languageEnglish (US)
Pages (from-to)2662-2670
Number of pages9
JournalJournal of Archaeological Science
Issue number10
StatePublished - Oct 2010



  • Carbon
  • Collagen
  • Diet reconstruction
  • Paleodiet
  • Rodents
  • Stable isotopes
  • Swine

ASJC Scopus subject areas

  • History
  • Archaeology

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