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Potential use of stable isotope and fatty acid analyses for traceability of geographic origins of jumbo squid ( Dosidicus gigas )
Author(s) -
Gong Yi,
Li Yunkai,
Chen Xinjun,
Chen Ling
Publication year - 2018
Publication title -
rapid communications in mass spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.528
H-Index - 136
eISSN - 1097-0231
pISSN - 0951-4198
DOI - 10.1002/rcm.8071
Subject(s) - squid , chemistry , stable isotope ratio , fishery , fatty acid , traceability , environmental chemistry , oceanography , food science , biochemistry , biology , geology , physics , statistics , mathematics , quantum mechanics
Rationale Squid is an important seafood resource for Asian and European countries. With the continuous development of processed squid products, an effective traceability system has become increasingly prominent. Here, we attempt to trace the fishery products of the main target species, jumbo squid ( Dosidicus gigas ), by using biochemical tracers. Methods Carbon and nitrogen isotope ratios (δ 13 C and δ 15 N values) and fatty acid profiles were identified in squid from three harvest locations in the eastern Pacific Ocean by isotope ratio mass spectrometry and gas chromatography/mass spectrometry, respectively. Comparative analysis was used to evaluate the geographic variations in tracers and to identify the suitable discriminatory variables among origins. Results Significant spatial variations were found in isotopic values and fatty acid profiles in squid muscle tissues, possibly because of different food availability and/or oceanographic conditions that each group experiences at a given location. The stepwise discriminant analysis indicated that δ 15 N, C16:1 n 7, C17:1 n 7, C18:2 n 6, C20:1 and C20:4 n 6 were effective variables at differentiating origin. Conclusions Combined use of stable isotope ratios and fatty acid analyses could trace geographic origins of jumbo squid. This study provides an alternative approach for improving authenticity evaluation of commercial squid products.