Table 4.
Growth performance, somatic indexes, apparent protein digestibility coefficients of diets and fillet analysis in rainbow trout fed with diets containing increasing levels of Narbonne vetch meal.
| Days | Parameter | Control | A10 | A30 |
| 0 | IBW (g) | 26.81 ± 0.49 | 26.03 ± 1.29 | 27.46 ± 0.24 |
| ITL (cm) | 13.59 ± 0.26 | 13.15 ± 0.24 | 13.61 ± 0.36 | |
| 63 | FBW (g) | 137.24 ± 4.16 a | 125.04 ± 10.27 a | 96.33 ± 1.03 b |
| FTL (cm) | 21.85 ± 0.23 a | 21.14 ± 0.68 a | 19.23 ± 0.18 b | |
| CF | 1.32 ± 0.04 | 1.32 ± 0.02 | 1.35 ± 0.02 | |
| WG (%) | 411.90 ± 10.56 a | 380.16 ± 24.51 a | 250.83 ± 2.46 b | |
| SGR (%/day) | 2.59 ± 0.03 a | 2.49 ± 0.08 a | 1.96 ± 0.01 b | |
| FCR | 0.78 ± 0.01 c | 0.83 ± 0.02 b | 1.07 ± 0.00 a | |
| HSI (%) | 1.06 ± 0.09 b | 1.04 ± 0.09 b | 1.27 ± 0.09 a | |
| VSI (%) | 11.11 ± 0.91 | 10.34 ± 0.27 | 10.36 ± 1.42 | |
| Protein Apparent Digestibility (%) | ||||
| ADC Protein | 93.72 ± 0.39 a | 85.11 ± 3.83 a | 72.21 ± 6.15 b | |
| Proximate Analysis of Muscle (%; on Wet Weight Basis) | ||||
| Humidity | 74.78 ± 0.67 | 74.99 ± 0.17 | 75.77 ± 0.63 | |
| Protein | 17.98 ± 0.10 | 18.17 ± 0.34 | 18.12 ± 0.16 | |
| Fat | 4.70 ± 0.70 | 4.15 ± 0.81 | 3.39 ± 0.43 | |
Values are expressed as mean ± standard deviation. Different superscript letters within each row denote significant differences among experimental groups (ANOVA, p < 0.05; n = 3). IBW, initial body weight; ITL, initial total length; FBW, final body weight; FTL, final total length; CF, condition factor; WG, weight gain; SGR, specific growth rate; FCR, feed conversion ratio; HSI, hepato-somatic index; VSI, viscero-somatic index; ADC Protein, apparent digestibility coefficient of protein.