Parameters Control 6 mg 10 mg
Length 12.39 ± 0.73 12.89 ± 0.8 a 13.13 ± 0.79 a
Weight 20.3 ± 3.38 23.36 ± 4.18 a 24.22 ± 4.05 a
Body weight gain (%BWI) 216.52 ± 9.52 258.34 ± 16.55 a 271.48 ± 17.64 a
Specific growth rate (SGR) 1.92 ± 0.05 2.13 ± 0.08 a 2.19 ± 0.08 a
Daily growth rate (DGR) 3.61 ± 0.16 4.31 ± 0.28 4.52 ± 0.29 a
Food conversional rate (FCR) 1.53 ± 0.09 1.3 ± 0.2 a 1.24 ± 0.1 a
Survival Rate 1.07 ± 0.02 1.09 ± 0.01 1.07 ± 0.01
Condition Factor (K) 100 ± 0 100± 0 ac 100 ± 0
Erythrocyte cell count (106) 0.81 ± 0.08 0.70 ± 0.0 2 a 0. 70 ± 0.03 a
Hb (g/100ml) 7.23 ± 0.72 6.23 ± 0.18 a 6.26 ± 0.27 a
Hematocrit 35.33 ± 5.5 30 ± 1 a 30.33 ± 2.3 a
MCV 420.66 ± 7.24 428 ± 6.88 a 432 ± 3.52 ab
MCH 98 ± 0.57 88.66 ± 0.33 ac 89.33 ± 0.33
MCHC 20.66 ± 0.33 20.33 ± 0.33 ac 20.66 ± 0.33
WBC (104) 0.35 ± 0.01 0.52 ± 0.07 a 0.66 ± 0.02 ab
Neutrophil 38 ± 0.88 28 ± 0.55 a 27 ± 1.73 a
Lymphocyte 24 ± 1.73 25 ± 1.0 a 25 ± 3.51 a
Monocyte 2.33 ± 0.33 2.66 ± 0.33 a 2.33 ± 0.33
Eosinophil 1.0 ± 0.57 1.33 ± 0.33 a 2.0 ± 0.57 ab
Total Immunoglobulin 14.47 ± 0.49 14.3 ± 1.8 a 16.53 ± 0.32 ab
IgM 16.66 ± 0.88 23.33 ± 2.6 a 27.33 ± 3.71 ab
Lysozyme  26 ± 2.64 51 ± 7.02 a 48.66 ± 10.13 a
CH50 31.66 ± 3.66 50.33 ± 10.68 a  37.33 ± 7.42 a
Table 1: Changes in biometric and blood factors of fingerling rainbow trout fishes (Oncorhynchus mykiss) treated with 6 and 10 mg folic acid per kg food: a, b and c (p<0.05).
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