Table 3 Model correct classification rate comparison results from five-fold cross-validation of 5 salmon groups, and the origin authenticity identification results of 17 test samples by using created model (6 replicants of each sample)

Model	Group	Alaska	Iceland_Farmed	Iceland_Wild	Norway	Scotland	Outlier	Correct rate (%)
KNN	Alaska	57	1	15	20	6	0	85.47
	Iceland_Farmed	0	47	0	3	0	0
	Iceland_Wild	0	1	89	0	0	0
	Norway	0	0	0	100	0	0
	Scotland	0	1	5	24	153	0
	Test samples	0	0	0	0	0	102	0
LDA	Alaska	99	0	0	0	0	0	100
	Iceland_Farmed	0	50	0	0	0	0
	Iceland_Wild	0	0	90	0	0	0
	Norway	0	0	0	100	0	0
	Scotland	0	0	0	0	183	0
	Test samples	25	1	1	1	35	39	58.83
RF	Alaska	99	0	0	0	0	0	100
	Iceland_Farmed	0	50	0	0	0	0
	Iceland_Wild	0	0	90	0	0	0
	Norway	0	0	0	100	0	0
	Scotland	0	0	0	0	183	0
	Test samples	41	1	1	0	53	6	92.16
SVM	Alaska	96	0	1	0	2	0	98.64
	Iceland_Farmed	0	47	0	0	3	0
	Iceland_Wild	0	0	90	0	0	0
	Norway	0	0	0	99	1	0
	Scotland	0	0	0	0	183	0
	Test samples	22	1	2	3	74	0	94.12
PLS-DA	Alaska	99	0	0	0	0	0	100
	Iceland_Farmed	0	50	0	0	0	0
	Iceland_Wild	0	0	90	0	0	0
	Norway	0	0	0	100	0	0
	Scotland	0	0	0	0	183	0
	Test samples	42	0	0	0	60	0	100
OPLS-DA	Alaska	99	0	0	0	0	0	100
	Iceland_Farmed	0	50	0	0	0	0
	Iceland_Wild	0	0	90	0	0	0
	Norway	0	0	0	100	0	0
	Scotland	0	0	0	0	183	0
	Test samples	42	0	0	0	60	0	100

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