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. 2020 Jan 1;8(1):0. doi: 10.3390/microorganisms8010067

Table 3.

Growth performance and feed utilization of juvenile Nile tilapia fed the experimental diets for 8 weeks.

Diets 1 Pooled
SEM
CON OTC BS7 BS8 LL7 LL8
IBW (g) 2 2.85 2.83 2.83 2.80 2.82 2.85 0.01
FBW (g) 3 9.77 b 10.6 a 10.3 ab 10.6 a 10.6 a 10.8 a 0.15
WG (%) 4 242 b 276 a 264 ab 277 a 278 a 279 a 5.78
FE (%) 5 81.9 b 93.5 a 90.4 ab 93.3 a 92.7 a 94.3 a 1.90
SGR(%/day) 6 2.37 b 2.54 a 2.48 ab 2.55 a 2.56 a 2.56 a 0.03
PER 7 2.31 b 2.58 a 2.51 ab 2.57 a 2.53 a 2.59 a 0.04
HSI (%) 8 1.46 1.46 1.36 1.35 1.45 1.45 0.02
VSI (%) 9 7.39 7.70 7.75 7.43 7.12 7.84 0.11
CF 10 1.70 1.64 1.71 1.69 1.74 1.70 0.01
Survival (%) 11 90.0 96.7 96.7 95.0 95.0 95.0 1.00

1 Values are means ± SD of triplicate groups of fish. Values in each row with different superscripts are significantly different (p < 0.05). Diets: CON = the basal diet, refer to Table 1; BS7 = B. subtilis at 1 × 107 CFU/g; LL7 = L. lactis at 1 × 107 CFU/g; BS8 = B. subtilis at 1 × 108 CFU/g; LL8 = L. lactis at 1 × 108 CFU/g; OTC = oxytetracycline; oxytetracycline at 4 g/kg. 2 Initial body weight. 3 Final body weight. 4 Weight gain (WG, %) = ((final wt.−initial wt.) × 100)/initial wt. 5 Feed efficiency ratio (FE, %) = (wet weight gain / dry feed intake) × 100. 6 Specific growth rate (SGR, %) = ((loge final wt.−loge initial wt.) × 100)/days. 7 Protein efficiency ratio (PER) = (wet weight gain/protein intake). 8 Hepatosomatic index (HSI) = (liver wt. × 100)/body wt. 9 Visceralsomatic index (VSI, %) = (viscera wt. × 100)/body wt. 10 Condition factor = (wet weight/total length3) × 100. 11 Survival rate (%) = ((total fish−dead fish) × 100)/total fish. a,b Data with different superscripts are significantly different.