Table 3.
Effect of rearing system on lipid content (g/100 g of muscle), fatty acid profile (g/100 g of total lipids) and fatty acid indices of Longissimus dorsi.
| Rearing System | I | FR | O | SED |
|---|---|---|---|---|
| Lipid content | 4.23 c | 3.50 b | 2.16 a | 0.52 |
| Fatty acid Profile | ||||
| C14:0 | 1.48 b | 1.56 b | 1.20 a | 0.24 |
| C16:0 | 27.01 | 26.66 | 26.77 | 1.51 |
| C18:0 | 13.03 | 12.57 | 12.77 | 1.36 |
| SFA | 41.52 | 40.79 | 40.74 | 2.33 |
| C16:1n7 | 3.16 | 3.47 | 3.42 | 0.57 |
| C18:1n7 | 3.87 | 4.07 | 4.08 | 0.42 |
| C18:1n9 | 42.32 | 41.50 | 41.02 | 2.58 |
| C20:1n9 | 0.86 a | 1.24 b | 1.62 c | 0.32 |
| MUFA | 49.35 | 49.03 | 48.52 | 2.76 |
| C18:2n6 | 6.26 | 7.28 | 7.05 | 1.59 |
| C18:3n3 | 0.74 | 0.70 | 0.67 | 0.12 |
| PUFA | 7.00 | 7.97 | 7.73 | 1.57 |
| Fatty acid indices | ||||
| Δ9-desaturase (C16) 1 | 10.47 | 11.52 | 11.33 | 0.98 |
| Δ9-desaturase (C18) 2 | 458.46 a | 478.38 b | 478.88 b | 2.50 |
| Δ9-desaturase (C16+C18) 3 | 55.21 | 55.56 | 55.10 | 0.19 |
| Elongase 4 | 0.48 | 0.47 | 0.48 | 0.12 |
| Thioesterase 5 | 18.25 a | 17.09 a | 22.31 b | 2.23 |
N = 50/group; ac Means in the same row with the same superscript do not differ significantly (P < 0.05); 1 Calculated as 100 × [16:1n-9/(16:1n-9 + 16:0)]; 2 Calculated as 100 × [(18:1n7 + 18:1n-9)/(18:1n7 + 18:1n-9 + 18:0)]; 3 Calculated as 100 × [(16:1n-9 + 18:1n7 + 18:1n-9)/(16:1n-9 + 16:0 + 18:1n7 + 18:1n-9 + 18:0)]; 4 Calculated as 16:0/14:0; 5 Calculated as 18:0/16:0.