Effect of Fructo-Oligosaccharides prebiotic on the blood parameters and growth of Rainbow trout (Oncorhynchus mykiss)

Document Type : Original Article

Authors

1 Department of Fisheries, Islamic Azad University, Sanandaj Branch, Sanandaj, Iran.

2 Department of Fisheries, Faculty of Fisheries and Environmental Sciences, Gorgan University of Agricultural Sciences and Natural Resources, Gorgan, Iran.

3 Offshore Water Research Center, Iranian Fisheries Science Research Institute, Agricultural Research, Education and Extension Organization, Chabahar, Iran.

Abstract

The aim of this study was to determine the effect of different levels of prebiotic Fructo-Oligosaccharides on the growth and hematology indices of rainbow trout (Oncorhynchus mykiss). For this purpose, 120 specimens for 42 days in 4 treatments, including treatment (1) control, without prebiotics, treatment (2) food containing 0.05, treatment (3) food containing 0.1, and treatment (4) food containing 0.2% prebiotic were divided and their growth and blood indices were evaluated. The results of the growth parameters showed significant difference in the rate of food conversion coefficient between the treatments (P<0.05), and in the specific growth rate factor, the lowest value was found in the control group and there was a significant difference with other treatments (P<0.05). In the final weight, fish fed prebiotics on day 42 compared to the control group, there was a significant difference (P<0.05). In the hematological parameters, the first sampling, the prebiotic had no significant effect on the number of red blood cells, average red blood cell volume, hematocrit, and hemoglobin (P<0.05), but the treatments on day 42 increased the indices of white blood cell count, the average concentration of red blood cell hemoglobin, and average cellular hemoglobin compared to prebiotic treatments and the control group. We suppose that prebiotics in the edible method has stimulated non-specific immunity in Rainbow trout. It is concluded that the levels of 0.1 and 0.2% Fructo-Oligosaccharides prebiotic in food can improve the condition of growth and hematology indices of Rainbow trout.

Keywords

References

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Aquaculture Sciences
Volume 11, Issue 1
March 2023
Pages 114-121

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