The Influence of some Phytobiotics (Thyme, Seabuckthorn) on Growth Performance of Stellate Sturgeon (A. stellatus, Pallas, 1771) in an Industrial Recirculating Aquaculture System
Keywords:
growth performance, growth rate, phytobiotics, recirculating aquaculture system, stellate sturgeonsAbstract
The objective of this experiment was to assess the influence of some phytobiotics on growth performance of stellate sturgeon (A. stellatus). There were two experimental variants: V1–thyme and V2–seabuckthorn. The fish used in this experiment were one year and four months old, with an initial mean weight of 122.78±31.60 g/fish (V1), respectively 121.21±32.54 g/fish (V2). The phytobiotics used, thyme (Thymus vulgaris) and seabuckthorn (Hippophae rhamnoides), have been embedded in fodder, by using gelatin, having a concentration of 2%/ kg fodder. Alterna Storioni feed-48% crude protein was used. The water quality parameters during the experiment were within normal limits for an optimum growth of experimental fish. At the end of the experiment significant differences (p<0.05) were observed between the two experimental variants in terms of final mean weight and individual growth rate. Differences regarding the SGR, FCR, PER were insignificant (p>0.05). Highest individual growth rate value (105.90 g) was recorded in V2 case and the lowest value (98.45 g) in case of V1. As a conclusion, it can be said that the two types of phytobiotics (thyme, seabuckthorn), administered in a concentration of 2%/kg fodder, have influenced the growth performance of stellate sturgeons.
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