Table 6. Fatty acid compositions (% total fatty acids) of liver of juvenile black seabream (Acanthopagrus schlegelii) fed different dietary DHA/EPA ratios.
Name | Dietary DHA/EPA ratio | |||||||||||
---|---|---|---|---|---|---|---|---|---|---|---|---|
0.65 | 1.16 | 1.60 | 2.03 | 2.67 | ANOVA P | F-value | ||||||
Mean | SEM | Mean | SEM | Mean | SEM | Mean | SEM | Mean | SEM | |||
14:0 | 2.69 | 0.11 | 2.62 | 0.10 | 2.81 | 0.06 | 2.82 | 0.11 | 2.76 | 0.01 | 0.52 | 0.87 |
16:0 | 15.56 | 0.36 | 15.06 | 0.23 | 15.40 | 0.39 | 15.65 | 0.34 | 15.10 | 0.20 | 0.60 | 0.72 |
18:0 | 14.32 | 0.54 | 13.95 | 0.37 | 14.12 | 0.08 | 14.35 | 0.10 | 13.34 | 0.56 | 0.41 | 1.10 |
∑SFA | 32.57 | 0.97 | 31.64 | 0.63 | 32.33 | 0.36 | 32.81 | 0.17 | 31.20 | 0.41 | 0.32 | 1.36 |
16:1n-7 | 5.30 | 0.19 | 4.79 | 0.21 | 5.00 | 0.21 | 4.98 | 0.03 | 4.76 | 0.12 | 0.23 | 1.68 |
18:1n-9 | 25.89 | 1.32 | 25.56 | 0.50 | 24.65 | 0.66 | 24.65 | 0.31 | 23.83 | 0.98 | 0.47 | 0.96 |
∑MUFA | 31.19 | 1.51 | 30.35 | 0.48 | 29.65 | 0.81 | 29.63 | 0.29 | 28.59 | 1.10 | 0.43 | 1.04 |
18:2n-6 | 6.95 | 0.10 | 6.91 | 0.27 | 6.49 | 0.01 | 6.20 | 0.32 | 6.62 | 0.19 | 0.15 | 2.18 |
20:2n-6 | 4.12 | 0.12 | 4.16 | 0.13 | 4.03 | 0.18 | 3.90 | 0.28 | 4.05 | 0.24 | 0.90 | 0.25 |
20:3n-6 | 1.48a | 0.08 | 1.60ab | 0.06 | 1.68ab | 0.01 | 1.62ab | 0.09 | 1.77b | 0.03 | 0.07 | 3.13 |
20:4n-6 | 3.83 | 0.22 | 4.10 | 0.16 | 4.23 | 0.18 | 4.17 | 0.25 | 4.49 | 0.25 | 0.36 | 1.22 |
22:5n-6 | 0.27a | 0.11 | 1.13b | 0.11 | 1.60c | 0.05 | 1.87c | 0.07 | 2.33d | 0.11 | 0.00 | 71.05 |
∑n-6PUFA | 16.65a | 0.34 | 17.90ab | 0.51 | 18.04ab | 0.21 | 17.76ab | 0.43 | 19.27b | 0.31 | 0.01 | 6.24 |
18:3n-3 | 0.29 | 0.03 | 0.43 | 0.06 | 0.31 | 0.03 | 0.29 | 0.02 | 0.41 | 0.04 | 0.06 | 3.19 |
20:5n-3(EPA) | 2.48b | 0.18 | 2.22b | 0.10 | 1.79a | 0.06 | 1.47a | 0.04 | 1.43a | 0.10 | 0.00 | 17.83 |
22:5n-3 | 2.42 | 0.68 | 1.96 | 0.52 | 1.88 | 0.46 | 1.77 | 0.26 | 1.64 | 0.23 | 0.80 | 0.41 |
22:6n-3(DHA) | 4.81a | 0.46 | 5.81ab | 0.45 | 6.19ab | 0.05 | 6.75b | 0.49 | 7.23b | 0.46 | 0.02 | 4.97 |
∑n-3PUFA | 9.99 | 1.31 | 10.42 | 0.62 | 10.17 | 0.49 | 10.29 | 0.63 | 10.71 | 0.83 | 0.98 | 0.11 |
n-3/n-6 PUFA | 0.60 | 0.07 | 0.58 | 0.05 | 0.56 | 0.04 | 0.58 | 0.05 | 0.55 | 0.03 | 0.97 | 0.13 |
n-3 LC-PUFA | 9.70 | 1.29 | 9.99 | 0.68 | 9.87 | 0.47 | 9.87 | 0.47 | 10.30 | 0.79 | 0.99 | 0.07 |
DHA/EPA | 1.94a | 0.07 | 2.61b | 0.15 | 3.46c | 0.10 | 4.57d | 0.23 | 5.05d | 0.09 | 0.00 | 86.28 |
Data are reported as means and SEM (n = 3). Values in the same line with different superscripts are significantly different (P < 0.05). Some fatty acids in trace amount such as 12:0, 20:0, 22:0, 24:0, 20:1n−9, 22:1n−11, 16:2n−6, 18:3n−6, 18:4n−3, 20:3n−3 and 20:4n−3 were not listed. DHA/EPA, 22:6n−3/20:5n−3; long-chain PUFA (C20-24); MUFA, monounsaturated fatty acids; PUFA, polyunsaturated fatty acids; SFA, saturated fatty acids.