Determination of Origin of Atlantic Salmon (Salmo salar): The Use of Multiprobe and Multielement Isotopic Analyses in Combination with Fatty Acid Composition To Assess Wild or Farmed Origin

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• 作者：Freddy Thomas ; Eric Jamin ; Karine Wietzerbin ; Ré ; gis Gué ; rin ; Michele Lees ; Eric Morvan ; Isabelle Billault ; Sol&#xe8 ; ne Derrien ; Jose Manuel Moreno Rojas ; Francesca Serra ; Claude Guillou ; Mari
• 刊名：Journal of Agricultural and Food Chemistry
• 出版年：2008
• 出版时间：February 13, 2008
• 年：2008
• 卷：56
• 期：3
• 页码：989 - 997
• 全文大小：569K
• 年卷期：v.56,no.3(February 13, 2008)
• ISSN：1520-5118

文摘

Variability within the stable isotope ratios in various lipidic fractions and the fatty acid composition of muscle oil has been analyzed for a large sample (171 fish) of wild and farmed Atlantic salmon (Salmo salar) from 32 origins within Europe, North America, and Tasmania. Sampling was extended over all seasons in 2 consecutive years and included fish raised by different practices, in order to maximize the range of variation present. It is shown that two readily measured parameters, δ¹⁵N measured on choline and δ¹⁸O measured on total oil, can be successfully used to discriminate between fish of authentic wild and farmed origin. However, the certainty of identification of mislabeling in market-derived fish is strengthened by including the percentage of linoleic acid C18:2n-6 in the lipidic fraction. Thus, several apparent misidentifications were found. The combination of these three analytical parameters and the size of the database generated makes the method practical for implementation in official laboratories as a tool of labeling verification.