Table 4.
The effects of FRS and NRS on fatty acid composition of duck thigh muscle.
| Items1 | Thigh muscle |
|||
|---|---|---|---|---|
| 8w |
13w |
|||
| FRS | NRS | FRS | NRS | |
| C12:0 | 0.167 ± 0.019c | 0.222 ± 0.021b,c | 0.328 ± 0.039a,b | 0.294 ± 0.017a |
| C13:0 | – | – | – | – |
| C14:0 | 1.742 ± 0.162c | 2.565 ± 0.236b | 2.888 ± 0.433a,b | 3.432 ± 0.186a |
| C15:0 | 0.18 ± 0.017b | 0.245 ± 0.022b | 0.325 ± 0.040a | 0.357 ± 0.019a |
| C16:0 | 68.522 ± 6.193c | 100.037 ± 9.851b | 112.151 ± 12.861a,b | 131.487 ± 7.607a |
| C17:0 | 0.463 ± 0.036c | 0.597 ± 0.056b,c | 0.731 ± 0.082a,b | 0.895 ± 0.050a |
| C18:0 | 27.475 ± 2.008 | 21.903 ± 2.730 | 18.743 ± 2.423 | 17.541 ± 2.556 |
| C20:0 | 0.463 ± 0.033 | 0.581 ± 0.053 | 0.706 ± 0.079 | 0.749 ± 0.051 |
| C21:0 | 0.069 ± 0.006 | 0.102 ± 0.0112 | 0.109 ± 0.015 | 0.104 ± 0.008 |
| C22:0 | 0.893 ± 0.080 | 1.219 ± 0.1122 | 0.729 ± 0.11 | 0.82 ± 0.113 |
| C24:0 | 0.074 ± 0.019 | 0.111 ± 0.025 | 0.138 ± 0.028 | 0.161 ± 0.046 |
| ƩSFA | 100.033 ± 6.875 | 127.569 ± 9.5462 | 136.834 ± 13.467 | 155.828 ± 7.199 |
| C14:1 | 0.181 ± 0.021 | 0.305 ± 0.0252 | 0.347 ± 0.045 | 0.334 ± 0.021 |
| C16:1 | 8.001 ± 0.866 | 14.125 ± 1.5082 | 15.111 ± 1.771 | 16.493 ± 0.922 |
| C17:1 | 0.729 ± 0.0412 | 0.554 ± 0.033 | 0.561 ± 0.052 | 0.515 ± 0.033 |
| C18:1(n-9)t | 0.976 ± 0.080 | 0.807 ± 0.151 | 1.018 ± 0.123 | 1.064 ± 0.223 |
| C18:1(n-9)c | 138.323 ± 14.658c | 213.313 ± 23.501b,2 | 217.065 ± 24.660b | 301.926 ± 20.378a,2 |
| C20:1 | 1.485 ± 0.141 | 2.026 ± 0.205 | 2.442 ± 0.277 | 2.891 ± 0.185 |
| C22:1(n-9) | 0.224 ± 0.018 | 0.279 ± 0.029 | 0.375 ± 0.040 | 0.375 ± 0.027 |
| ƩMUFA | 149.919 ± 15.699c | 231.247 ± 25.143b,2 | 236.783 ± 26.605b | 323.031 ± 21.332a,2 |
| C18:2(n-6)t | 0.082 ± 0.003 | 0.088 ± 0.008 | 0.085 ± 0.008 | 0.091 ± 0.004 |
| C18:2(n-6)c | 86.124 ± 7.299c | 113.434 ± 10.106b,c | 141.69 ± 16.164a,b | 166.306 ± 9.849a |
| C18:3(n-6) | 0.531 ± 0.057 | 0.699 ± 0.083 | 0.728 ± 0.097 | 0.917 ± 0.053 |
| C20:2(n-6) | 1.039 ± 0.052b | 1.02 ± 0.068b | 1.27 ± 0.116a,b | 1.377 ± 0.088a |
| C20:3(n-6) | 1.405 ± 0.083 | 1.587 ± 0.116 | 1.427 ± 0.086 | 1.815 ± 0.1192 |
| C20:4(n-6) | 43.979 ± 1.207 | 41.283 ± 1.507 | 42.693 ± 0.933 | 43.136 ± 1.591 |
| Ʃn-6 | 133.111 ± 6.956c | 158.095 ± 11.236b,c | 187.871 ± 16.348a,b | 213.635 ± 11.073a |
| C18:3(n-3) | 3.401 ± 0.325 | 4.834 ± 0.456 | 4.864 ± 0.868 | 5.644 ± 0.478 |
| C20:3(n-3) | 0.074 ± 0.009 | 0.092 ± 0.013 | 0.081 ± 0.008 | 0.084 ± 0.006 |
| C20:5(n-3) | 0.183 ± 0.015 | 0.265 ± 0.0282 | 0.237 ± 0.014 | 0.219 ± 0.019 |
| C22:6(n-3) | 4.014 ± 0.184 | 3.955 ± 0.251 | 3.728 ± 0.241 | 3.99 ± 0.324 |
| Ʃn-3 | 7.666 ± 0.366 | 9.115 ± 0.562 | 8.878 ± 0.866 | 9.881 ± 0.663 |
| ƩPUFA | 140.777 ± 7.284c | 167.209 ± 11.744b,c | 196.749 ± 17.138a,b | 223.517 ± 11.633a |
| ƩMUFA/ƩSFA | 1.452 ± 0.066c | 1.756 ± 0.080b,2 | 1.71 ± 0.055b | 2.057 ± 0.071a,2 |
| ƩPUFA/ƩSFA | 1.437 ± 0.039 | 1.329 ± 0.040 | 1.47 ± 0.046 | 1.435 ± 0.034 |
| Ʃn-6/Ʃn-3 | 17.366 ± 0.435b | 17.323 ± 0.57b | 22.433 ± 1.623a | 22.671 ± 1.57a |
a-cIndicated a significance (P ＜0.05) of Duncan's multiple-range tests among 8w-FRS, 8w-NRS, 13w-FRS, and 13w-NRS in thigh muscle.
Abbreviations: FRS, floor rearing system; MUFA, monounsaturated fatty acid; NRS, net rearing system; PUFA, polyunsaturated fatty acids; SFA, saturated fatty acid; 8w, eight week; 13w, 13th week.
1
The items displayed in the table were selected from 35 kinds of fatty acids with detectable rates higher than 30%, otherwise were not shown in the table or displayed in “–”.
2
Indicated a significance between FRS ducks and NRS ducks at the certain age of 8w or 13w.