Items 0.00% At Origanum vulgare extract % of the diets
(control) 1.50% 1% 0.50%
Moisture 74.64 ± 068a 73.77 ± 0.14a 73.75 ± 0.27a 73.84 ± 0.46a
Crude protein 60.00 ± 0.06a 60.79 ± 0.32a 60.59 ± 0.37a 60.68 ± 0.39a
Total lipids 19.72 ± 0.22a 19.79 ± 0.36a 19.67 ± 0.18a 19.97 ± 0.49a
Ash 19.81 ± 0.31a 19.24 ± 0.55a 19.11 ± 0.61a 1.31 ± 0.60a
a-no significant different in the same row from the table at P<0.05.Proximate chemical composition of fish at start of this study was 75.22 ± 0.30% moisture; 59.04 ± 0.82% protein; 18.11 ± 0.76% lipid and 21.42 ± 0.57% ash.
Table 2: Proximate chemical analysis on dry matter basis (mean ± SE) of Nile tilapia fed diets containing different levels of Origanum vulgare extract.