Items 0.0 % (control) At Origanum vulgareextract % in the diet
0.50% 1.00% 1.50%
Feed intake 34.10 ± 0.34c 39.74 ± 0.22a 38.75 ± 0.36a 37.29 ± 0.52b
(g feed/fish)
FCR 2.01 ± 0.05a 1.67 ± 0.07b 1.72 ± 0.06b 1.86 ± 0.04ab
PER 1.81 ± 0.05c 2.17 ± 0.08a 2.05 ± 0.05ab 1.94 ± 0.04bc
APU %   28.37 ± 0.28d 35.73 ± 0.20a 34.08 ± 0.32b 32.40 ± 0.45c
AFU % 41.36 ± 0.40d 50.76 ± 0.28a 46.56 ± 0.42b 44.14 ± 0.60c
EU % 17.32 ± 0.17c 21.84 ± 0.11a 20.63 ± 0.22b 20.40 ± 0.21b
Feed intake, feed conversion ratio (FCR), protein efficiency ratio (PER), apparent protein utilization (APU), apparent fat utilization (AFU) and energy utilization (EU) of Nile tilapia fed diets containing different levels of Origanum vulgare extract. Means the same letter (a/b/c) in the same row is not significantly different at P<0.05.
Table 4: Feed intake, feed conversion ratio (FCR), protein efficiency ratio (PER), apparent protein utilization (APU), apparent fat utilization (AFU) and energy utilization (EU) of Nile tilapia fed diets containing different levels of Origanum vulgare extract.