Vol.15, No.3, July 2016
Blood parameters of Caspian brown trout (Salmo trutta caspius) fingerlings affected by dietary L-ascorbyl-2-polyphosphate
Description:-Department of Fisheries, Science and Research Branch, Islamic Azad University, P.O. Box: 14515-775, Tehran, Iran. -Young Researchers and Elites club, Science and Research Branch, Islamic Azad University, Tehran, Iran. -Young Researchers and Elites Club, North Tehran Branch, Islamic Azad University, Tehran, Iran. -Department of Cultivation, Coldwater Fishes Research Center (CFRC), Tonekabon, Iran. * Corresponding Author's Email Address: rajabi.h@srbiau.ac.ir
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Abstract
This study was aimed to evaluate the effect of L-ascorbyl-2-polyphosphate as a dietary ascorbic acid source on blood parameters of Caspian brown trout (Salmo trutta caspius), including red blood cell (RBC) count, white blood cell (WBC) and WBC differential. A total number of 600 Caspian brown trout (9.6±0.6 g) fingerlings were randomly distributed in triplicates among five treatments each containing 40 specimens. Experimental diets were also prepared by adding 0, 50, 100, 200 and 400 mg kg-1
L-Ascorbyl-2-Polyphosphate to the basal diet. Feeding was done for nine weeks in each treatment. The survival rate in all treatments was 100%. The results showed a significant increase in RBC, hemoglobin, hematocrit, WBC and lymphocyte (p<0.05) by supplementing L-ascorbyl-2-polyphosphate compared to the control treatment. The fish fed by 200 mg ascorbic acid kg-1 diet had the maximum hemoglobin and hematocrit in comparison with the other treatments. The current research showed that dietary L-ascorbyl-2-polyphosphate influences the complete blood count of Caspian brown trout while fingerlings fed with the optimum amounts of 200 mg ascorbic acid kg-1 diet for a period of 9 weeks trail.
Keywords: Ascorbic acid, Growth, Hematological parameters,Salmo trutta caspius.

Author:Rajabi Islami H. *; Arab N.; Assare R.; Rastravan M.I.; Ebtekari R.1
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