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Hiraoka H.,Food and Agricultural Materials Inspection Center Kobe Regional Center | Morita S.,Food and Agricultural Materials Inspection Center Kobe Regional Center | Gotou Y.,Food and Agricultural Materials Inspection Center Kobe Regional Center | Hattori S.,Food and Agricultural Materials Inspection Center Kobe Regional Center | And 2 more authors.
Fisheries Science | Year: 2014

In aquatic ecosystems, the stable nitrogen isotope ratio (δ15N) of wakame is affected by the δ15N of its nitrogen source. Thus, the δ15N of wakame is thought to differ between those grown in different aquatic ecosystems. To confirm the authenticity of the geographic origin of Naruto dried wakame (DW), we conducted δ15N analysis. The δ15N (mean ± σ) of Naruto DW model samples (n = 72) was 11.1 ± 1.9 ‰. The δ15N confidence range of Naruto DW from the model was 5.3-16.9 ‰ (mean ± 3σ). The δ15N values of the DW model of Chinese (n = 23) and South Korean origin (n = 22) were 4.2 ± 1.4 and 1.6 ± 2.3 ‰, respectively. Within the δ15N confidence range of Naruto DW, two model samples of Chinese DW and one model sample of South Korean DW were found. From those results, DW of Naruto origin was able to be distinguished from DWs of the Chinese and the South Korean. © 2014 The Japanese Society of Fisheries Science. Source

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