The effects of different levels of vitamins C and E on the growth indices in rainbow trout (Oncorhynchus mykiss)

Document Type : Biology(Animal)

Authors

1 Department of Fisheries, Faculty of Agriculture and Natural Resources, Science and Research Branch, Islamic Azad University, Tehran, Iran

2 Iran Fisheries Science Research Institute, Agricultural Research, Education and Promotion Organization, Tehran, Iran

3 Department of Aquatic Animal Health, Veterinary Faculty, University of Tehran, Tehran, Iran

4 Department of Fisheries, Ahvaz Branch, Islamic Azad University, Ahvaz, Iran

Abstract

This study was conducted to assay the effects of different levels of dietary vitamins C and E on growth indices and survival of rainbow trout (Oncorhynchus mykiss) in pond culture of Marzan  abad (Kelardasht-Mazandaran  Province)  from  December  2011  to  February  2011. Seven diets were supplemented. 300 fish with the average weight of 17 g were introduced to ponds for 60 days. The results showed that the highest and the lowest weight gain were in fish fed  with  diet  containing  50  mg/kg  vitamin  C  and  E  and  0  mg/kg  vitamin  C  and  E, respectively.  The  highest  and  the  lowest  Feed  Conversion  Ratio  (FCR)  were  measured  in control and diet 50 mg/kg vitamin C and E.  There is a significant different in their treatments (P<0.05). Also, the lowest and highest amount of Weight Gain (WG), Specific Growth Rate (SGR),  Protein  Efficiency  Ratio  (PER),  Condition  Factor  (CF)  was  found  in  control  and treatment  50  mg/kg  vitamin  C  and  E,  respectively.  In  conclusion  vitamin  C  and  have  an important role in enhancement of growth performance and feed efficiency of rainbow trout.

Keywords

Journal of Animal Environment
Volume 5, Issue 3
November 2012
Pages 9-15

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