Efficiency of growth blood cells parameters, hepatic enzymes and price of cultured Beluga (Huso huso) fed by three Iran-made diets
Subject Areas : New Technologies in Aquaculture Development
Habib
Vahabzadeh
1
(Member of scientific board of fisheries department, Islamic Azad University, branch of Lahijan)
Keywords: growth, Cost, Diet, Keywords: Beluga, Conversion ratio,
Abstract :
Breeding expansion of giant sturgeon (Huso huso) in different regions of Iran and production of formulated food in sturgeon farms by domestic factories and changes in the price of imported foods, caused the importance of appropriate diet selection. This research was conducted to evaluate the diets' biological performances and economic efficiency of some diets produced in Iran for rearing two-years-old Beluga for 45 days. Several 32 pieces of giant sturgeon with an average weight of 2156.94 ± 336.61 grams were labelled and cultured in 4 groups. 4 treatments including three types of Iranian food (treatments 1, 2, and 3) and an imported diet (treatment 4) were determined, which by default had different formulations in terms of protein and fat sources and amounts. Feeding set up according to the manufacturer's instructions based on stocking density (every 15 days Biometry) and water temperature. The results showed that the highest values of body weight gain, obesity coefficient, and the lowest food conversion rate were observed in treatment 2. In the comparison of red blood indices, except for the haematocrit percentage of treatment 4, which was higher, there was a difference in the treatments was not observed. But the difference in the number of white blood cells counts and the differential count in the treatments were significant. The fish fed with treatments 3 and 1 had lower amounts of liver enzymes compared to other treatments. Considering the costs related to each of the rations, overall, treatment 2 was preferred to other treatments.
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