Table 1.

Fatty acid composition (% of total fatty acids) of vacuum packaged rainbow trout treated without nisin (control) during 16 days storage at 4 °C^a

Fatty acids	Storage time (days)
	0	4	8	12	16
C14	0.96 ± 0.08	0.93 ± 0.08	0.96 ± 0.06	1.10 ± 0.05	1.40 ± 0.15
C15	ndb	0.13 ± 0.03	0.03 ± 0.00	nd	nd
C16	12.63 ± 0.61	12.12 ± 0.18	12.76 ± 0.21	12.33 ± 0.50	12.03 ± 1.72
C16:1	1.90 ± 0.10	1.06 ± 0.72	2.76 ± 0.33	2.53 ± 0.32	2.10 ± 0.26
C18	4.06 ± 3.83	4.00 ± 0.02	2.29 ± 0.34	2.00 ± 0.23	1.93 ± 0.08
C18:1	45.33 ± 1.35	44.60 ± 0.72	33.30 ± 5.77	30.26 ± 5.20	29.73 ± 3.62
C18:2 ω6	19.90 ± 0.72	19.66 ± 0.38	17.76 ± 0.43	15.98 ± 1.60	15.16 ± 2.56
C18:3 ω3	0.40 ± 0.20	0.50 ± 0.05	0.43 ± 0.03	0.60 ± 0.05	0.50 ± 0.05
C20	3.25 ± 0.05	3.93 ± 0.21	3.83 ± 0.16	3.80 ± 0.30	3.86 ± 0.48
C20:4 ω6	0.67 ± 0.20	0.53 ± 0.08	0.50 ± 0.10	0.43 ± 0.14	0.43 ± 0.04
C22	0.40 ± 0.02	0.20 ± 0.02	0.33 ± 0.03	0.50 ± 0.05	0.56 ± 0.07
C20:5 (EPA)	0.70 ± 0.05	0.5 ± 0.33	0.66 ± 0.03	0.56 ± 0.02	0.54 ± 0.05
C24	0.33 ± 0.07	0.26 ± 0.08	0.16 ± 0.03	0.30 ± 0.05	0.15 ± 0.06
C22:5 ω3	0.36 ± 0.03	0.33 ± 0.03	0.36 ± 0.03	0.33 ± 0.03	0.40 ± 0.05
C22:6 (DHA)	5.23 ± 0.18	4.86 ± 0.20	4.60 ± 0.49	4.43 ± 0.72	4.23 ± 0.80
SFA	21.63 ± 4.79a	21.57 ± 2.10b	20.36 ± 3.21bc	20.03 ± 4.00c	19.93 ± 1.96c
MUFA	47.23 ± 5.25a	45.66 ± 1.11b	36.06 ± 4.67c	32.79 ± 3.51d	31.83 ± 5.00d
PUFA	27.26 ± 1.22a	26.38 ± 3.98b	24.31 ± 5.44c	22.33 ± 5.21d	21.26 ± 1.77e
EPA+DHA	5.93 ± 1.20a	5.36 ± 1.08b	5.26 ± 0.78bc	4.99 ± 0.94bc	4.77 ± 0.84c
ω3/ω6	0.32 ± 0.04a	0.30 ± 0.03a	0.33 ± 0.01a	0.36 ± 0.05a	0.36 ± 0.08a
PUFA/SFA	1.26 ± 0.30a	1.22 ± 0.06a	1.20 ± 0.07a	1.11 ± 0.41a	1.06 ± 0.32a

^aDifferent letters within each row represent a significant difference (p < 0.05)

^b nd non detected