Carbon isotopic changes of 16 proteinogenic amino acids during trophic transfer in a cultured marine consumer

Abstract Stable carbon isotopic compositions of amino acids ( δ 13 C AA ) in organisms potentially record information on carbon sources and flow in food webs. In this study, we report δ 13 C values of 16 proteinogenic amino acids in marine consumers and evaluate their changes associated with the trophic transfer by using a newly developed analytical method based on multidimensional preparative liquid chromatography and elemental analysis with isotope-ratio mass spectrometry. Our targets in this