The Effect of feeding with Selenium enriched Saccharomyces cerevisiae on the growth and resistant of rainbow trout (Oncorhynchus mykiss) against environmental stresses and Yersinia ruckeri

Document Type : Nutrition

Authors

1 Department of Pathobiology and Quality Control, Artemia and Aquatic Research Institute, Urmia University, Urmia, Iran

2 Department of Biology, Faculty of Science, Urmia University, Urmia, Iran

Abstract

Selenium is an essential micronutrient element due to the antioxidant and anti-cancer properties have attracted much attention. Organic form of this element has high bioavailability and toxicity is very low. The goal of this study was evaluate the effect of feeding by Selenium-enriched Saccharomyces cerevisiae as an organic form on the growth and resistant of rainbow trout. For this purpose, Six hundred rainbow trout with 29 ± 4 g mean weight were fed for a period of 60 days with a commercial pellet containing different concentration of Selenium Enriched yeast (106, 107 and 108 CFU/g of diet) and control diet (without complementation). Sampling was done for biometry at the day of 0 and 60 and at the end of trial the fish were challenged with thermal and hypoxia stresses, also an experimental challenge was scheduled with Yersinia ruckeri. Results showed that the addition of Selenium enriched yeast into the fish diet significantly (P<0.05) improved rainbow trout growth parameters in comparison the control. Also, the fish that received maximum level of Selenium enriched yeast (108 CFU/ml) had higher resistant against stresses and Yersinia ruckeri than the other groups. In conclusion, addition of selenium enriched Saccharomyces cerevisiae into diet could enhance the growth and resistant of rainbow trout against environment stresses and disease.

Keywords

Journal of Animal Environment
Volume 4, Issue 4
February 2013
Pages 49-58

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