Table 4. Changes in total volatile base nitrogen (mgN/100 g) of houndfish treated by DW, 1% AA, CTS 1, CTS 2, CTS 3, CTS 4 during ice storage

Samples	Storage time (days)
Samples	0	4	8	12	16	20
DW	8.53 ± 0.20^a	13.4 ± 1.01^b	14.2 ± 0.80^c	17.1 ± 1.67^d	19.0 ± 0.54^ed	22.2 ± 0.59^e
1% AA	8.48 ± 0.17^a	12.4 ± 1.07^ab	13.2 ± 0.97^bc	15.8 ± 0.48^cd	18.3 ± 0.27^d	20.3 ± 1.55^d
CTS 1	8.44 ± 0.13^a	11.7 ± 0.59^a	12.3 ± 0.89^ab	14.7 ± 0.55^bc	16.9 ± 0.55^c	18.5 ± 1.00^c
CTS 2	8.40 ± 0.32^a	11.5 ± 1.10^a	12.0 ± 0.25^ab	13.5 ± 1.23^ab	16.4 ± 1.05^bc	18.3 ± 0.72^bc
CTS 3	8.33 ± 0.21^a	11.3 ± 0.25^a	11.7 ± 0.43^ab	12.8 ± 0.25^a	14.4 ± 1.01^a	16.3 ± 0.79^a
CTS 4	8.36 ± 0.22^a	11.5 ± 1.19^a	11.9 ± 0.55^a	13.3 ± 0.86^ab	15.1 ± 0.60^ab	16.7 ± 0.33^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.