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Investigating effects of different values of Chitosan polysaccharide on growth parameters in rainbow trout (Oncorhynchus mykiss)

Document Type : Article

Authors

1 Ph.D. Candidate of Aquaculture, Faculty of Natural Resources, Urmia University, Iran

2 Assistance of Professor, Faculty of Veterinary Medicine and Artemia and Aquatic Animals Research Institute, Urmia University, Iran

Abstract

Abstract
In this study 900 rainbow trout (mean weight 25 gr) were obtained from a local fish farm in Urmia city and after acclimatization for 10 days, the fish were randomly divided into four groups (with three replication) and fed for 8 weeks with 0 (control), 2.5, 5 and 10 g chitosan/kg feed, respectively. Finally treatments were fed the control diet (without any chitosan) for another 3 weeks. Body weight, total length, food conversion rate, Special Growth Rate, Condition Factor and Daily weight gain were determined every two weeks and at the end of the trial. Data were analyzed using SPSS ver. 20. Results depicted no positive effects of chitosan on growth and nutritional parameters of rainbow trout. However, treatment four considerably (10 g chitosan/kg feed) inhibited live weight gain, total length increment and deteriorated food conversion rate (FCR) and specific growth rate (SGR) in comparison to control group and third treatment (5 g chitosan/kg feed).

Keywords

References
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Experimental animal Biology
Volume 4, Issue 1 - Serial Number 1
September 2015
Pages 35-44
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