Journal of Fisheries Science and Technology

Journal of Fisheries Science and Technology

The Effect of Different Levels of Dietary Choline on Growth Rate, Body Composition Blood Indices and Liver Lipid of Juvenile Acipenser baerii

Authors
Mohammad Ali Yazdani Sadati 1
Mir Hamed Sayed Hassani
Mahmoud Bahmani 2
Mahmoud Mohseni
Mahmoud Shakorian
Hamid Reza Pourali
Mohsen Pou asadi
1 Head of aquaculture departemant of caspian sea internationa; research institue
2 Head ofinternational sturgeon Research Institue of Caspian sea
Abstract
A 12-week feeding trial was carried out in 500 L fiberglass tanks to evaluate the effect of dietary choline at 0, 2, 4, and 8 g kg -1 levels on growth rate, body composition and total liver lipid of juvenile Acipenser baerii (37.67±0.67 g). A semi purified basal diet was formulated using vitamin free casein and wheat gluten as a protein source, a mixture of animal and plant oils as a lipid source and dextrin as a carbohydrate source. Four isonitrogenous (40% protein) and isoenergetic (18 MJ kg-1) diets were prepared and fed to the fish three times daily to apparent satiation. Weight gain, feed conversion ratio (FCR), specific growth rate (SGR) and protein efficiency ratio (PER) were significantly affected by dietary choline (p<0.05). The best growth performance was observed in fish fed diets containing 2 and 8 g kg -1 choline (p<0.05). Fish fed with 2 and 4 g kg -1 choline showed higher lipid content compared with the control diet (p<0.05), but not significantly different in body protein (p>0.05). Total lipid of liver and plasma, plasma cholesterol, triglyceride and phospholipids levels showed an increasing trend with increasing levels of dietary choline, but not significantly different among treatments (p>0.05). Based on the results, we recommend adding a 1.5 gkg-1 choline to commercial diet of juvenile Acipenser baerii.
Keywords
Acipenser baeri
Cholin Chloride
Growth performance
Body composition
Index Blood