Abstract:Based on differences in fatty acid content among salmon from different regions，fatty acid fingerprint was used for salmon origin traceability.Gas chromatography was employed to detect and analyze the content of 37 fatty acids in salmon samples from three different origins. The results revealed that 25 fatty acids could serve as characteristic indicators for tracing the origin of salmons from China，Chile，and Norway. The overall accuracy rate for correctly identifying the salmon origin was 100%，with a cross-validation accuracy rate of 93.3% and a testing set validation accuracy rate of 88.9%. Therefore，the salmon origin traceability method based on fatty acid fingerprints turns out to be feasible.