Growth and haematological response of sturgeon hybrids Russian sturgeon X belgua to protein and lipid contents in the diet

Gershanovich, A.D.; Kiselev, G.A.

Comparative Biochemistry and Physiology A Comparative Physiology 106(3): 581-586


ISSN/ISBN: 0300-9629
Accession: 031619593

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1. Fingerlings of intergenious hybrid Russian sturgeon (Acipenser guldenstadti) times beluga (Huso huso) weighing 22 g reared in water with salinity 18 ppt were fed nine diets differing in protein and fat content. 2. The increase of dietary protein content (from 45 to 52%) improved the fingerlings growth rate, food and protein conversion efficiencies. No effect of further protein content increase to 60% was observed. 3. The increase of dietary fat content from 10 to 20% positively influenced all growth results. 4. The muscular lipid content increased following the increase in dietary fat due to accumulation of triacylglycerols. 5. Distinctive leucopenia in neutrophils and leucophilia in lymphocytes following dietary protein and fat content increase were observed. 6. It was concluded that within the analysed range of values the increase of dietary protein and lipid content improved the physiological status of sturgeon hybrid fingerlings.