The influence of feeding frequency on the haematological profile of A. stellatus (Pallas 1771), reared in a recirculating aquaculture system.

The aim of this study is to assess the physiological status of Acipenser stellatus species (Pallas, 1771) in different feeding frequencies conditions: V1-2 meals/day, respectively V2-4 meals/day. Thus, the physiological status of stellate sturgeon is characterized by hematological indicators, erythrocyte constants, as well as two important blood biochemical parameters (serum protein and serum glucose). At the final of 30 days experiment, both grow performance parameters (FCR, SGR, PER) and hematological parameters analyzed (erythrocyte count, hematocrit, hemoglobin) have almost equal values (statistically insignificant differences p ≥ 0.05) for both feeding frequencies applied. Among blood biochemical parameters analyzed, glucose values are higher at V1 37.53 ± 2.66 mg/dl blood, compared to V2 34.26 ± 4.89 mg/dl blood. Regarding serum proteins, the differences between their registered values, for each one of the variants, are statistically insignificant (p ≥ 0.05). The general conclusion that emerges from this current study shows that in case of six months old stellate sturgeons, reared under recirculating aquaculture system conditions, feeding frequency does not significantly influence their haematological profile.