The Effects of Some Phytobiotics on Biochemical Composition of Oreochromis Niloticus Meat Reared in a Recirculating Aquaculture System

The purpose of this experiment is the evaluation of biochemical composition of Nile tilapia meat by administrating several phytobiotics in feed. Oreochromis niloticus, with an initial average weight of 125.41±34.33 g/exemplar, were reared, during six weeks in a recirculating aquaculture system. The phytobiotics from this experiment were administered in feed in a concentration of 1%/kg feed and consist in: thyme (Thymus vulgaris), fenugreek (Trigonela foenum graecum), neem (Azadirachta indica). Thus, the experimental variants were: V1-control, V2-thyme, V3-fenugreek and V4-neem. Fish were fed with SOPROFISH pelleted feed with 38% crude protein and 7% crude fat. During the experiment, the physico-chemical parameters of technological water were situated in normal range for optimal growth. At the end of the experiment, significant differences (p0.05; p=0.68). The highest value of moisture (87.25%) was registered in V2; the lowest value of fat content (0.05%) was recorded in V4 and the lowest protein content (10.79%) in V2. In conclusion, thyme, fenugreek and neem administration, in concentration of 1%/kg feed, influenced significantly the biochemical composition of Oreochromis niloticus