Published in Scientific Papers. Series D. Animal Science, Vol. LXIII, Issue 2
Written by Ștefan-Mihai PETREA, Ira-Adeline SIMIONOV, Alina MOGODAN, Aurelia NICA, Dragoș CRISTEA, Mihaela NECULIȚĂ
The meat nutritional value is an important factor that influence consumer preferences for certain fish species. Thus, the aim of this study is to identify the influence of feeding rate on stellate sturgeon meat biochemical composition, assessed by determining the percentage of dry matter, crude fat, crude protein and ash. Two feeding rates were tested (F1 - 1% BW, respectively F2 - 2% BW), in replicate. The biochemical evaluation of stellate sturgeon meat revealed better values in terms of crude protein content at F2 duplicate (17.86±0.14 %, respectively 17.70±0.17%), compared to F1 experimental variant duplicate (16.71±0.2%, respectively 16.78±0.18%). Also, F2 registered a higher crude fat (1.32±0.04%, respectively 1.36±0.03) and ash content (1.69±0.06%, respectively 1.77±0.09), compared to F1 (crude fat: 1.21±0.04%, respectively 1.27±0.05%; ash: 1.33±0.10%, respectively 1.39±0.11%). The water-to-protein ratio indicate a high nutritional value for meat of stellate sturgeon exemplars, reared by applying a feeding rate of 2% BW (4.31±0.15, respectively 4.35±0.17 at F2 duplicate, compared to 4.71±0.11, respectively 4.67±0.10 at F1). As a conclusion, the use of 2% BW feeding rate for rearing stellate sturgeons in a recirculating aquaculture system (RAS) assures a superior protein and fat retention and improves protein use efficiency (PUE).
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