Table 6. Changes in TCA-soluble peptides (μmol tyrosine/g) of houndfish treated by DW, 1% AA, CTS 1, CTS 2, CTS 3, CTS 4 during ice storage

Samples	Storage time (days)
	0	4	8	12	16	20
DW	0.25 ± 0.03^a	0.72 ± 0.04^b	0.99 ± 0.16^b	1.39 ± 0.10^b	2.46 ± 0.12^c	2.96 ± 0.06^d
1% AA	0.26 ± 0.05^a	0.68 ± 0.05^b	0.85 ± 0.08^ab	1.20 ± 1.13^ab	2.24 ± 0.09^c	2.82 ± 0.07^d
CTS 1	0.23 ± 0.04^a	0.61 ± 0.03^ab	0.77 ± 0.13^ab	1.10 ± 0.23^ab	1.85 ± 0.11^b	2.23 ± 0.07^c
CTS 2	0.22 ± 0.03^a	0.59 ± 0.05^ab	0.72 ± 0.07^ab	0.96 ± 0.13^a	1.58 ± 0.19^ab	1.77 ± 0.08^b
CTS 3	0.22 ± 0.07^a	0.53 ± 0.09^a	0.61 ± 0.08^a	0.84 ± 0.06^a	1.35 ± 0.06^a	1.45 ± 0.13^a
CTS 4	0.23 ± 0.06^a	0.60 ± 0.03^ab	0.69 ± 0.04^a	0.94 ± 0.11^a	1.46 ± 0.21^a	1.55 ± 0.14^ab

Values are mean ± SD (n = 3).
Values with different superscripts within the same column are significantly different (p < 0.05).
DW, houndfish treated with distilled water; 1% AA, houndfish treated with 1% acetic acid; CTS 1, houndfish treated with 0.5% chitosan; CTS 2, houndfish treated with 1% chitosan; CTS 3, houndfish treated with 1.5% chitosan; CTS 4, houndfish treated with 2% chitosan.