Published in Scientific Papers. Series D. Animal Science, Vol. LXIV, Issue 2
Written by Alina MOGODAN, Ira-Adeline SIMIONOV, Ștefan-Mihai PETREA, Aurelia NICA, Dragoș CRISTEA, Mihaela NECULIȚĂ
The purpose of this research was to evaluate the growth performance of Oreochromis niloticus reared in a recirculating aquaculture system in case of inclusion in feed of some phytoadditives. The experiment was conducted on 98 days and the biometric measurements were performed at the beginning (I.), at the end (F.), but also at an intermediary moment (INT.-after20 days of the experiment). The experimental variants were: V1-control, V2-1% Rosmarinus officinalis, V3-1% Hippophae rhamnoides and V4-1% Zingiber officinale. At the end of the experiment the best values of IBG (1.95 g/ind.-Int.; 8.50 g/ind.-F.), SGR (1.28%/day-Int.; 0.76%/day-F.), FCR (1.37 g/g-Int.; 1.63 g/g- F.) and PER indicator (1.93 g/g-Int.; 1.61 g/g-F.) were registered in case of variant V3. Also, in same variant, were observed a reduction of the variability of body mass and total length of fish. In the variants in which phytobiotics were administered, were obtained a better condition factor (V1-2.04; V2-2.11; V3-2.07; V4-2.09) at the end of the experiment. In conclusion, the results shows that the administration of sea buckthorn in a long period of time, has the best effect on growth performance of Oreochromis niloticus species.
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