Probiotic bacteria <Emphasis Type="Italic">Lactobacillus rhamnosus</Emphasis> influences the blood profile in rainbow trout <Emphasis Type="Italic">Oncorhynchus mykiss</Emphasis> (Walbaum) |
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| Authors: | A Panigrahi V Kiron S Satoh T Watanabe |
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| Institution: | (1) Department of Marine Biosciences, Tokyo University of Marine Science and Technology, Minato Tokyo, 108-8477, Japan;(2) Central Institute of Brackish Water Aquaculture, 75, Santhom High Road, R. A. Puram, Chennai, 600-028, India |
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| Abstract: | This paper reports the effect of feeding probiotic diets on blood profiles in rainbow trout. Two experiments were performed:
in the first, fish of average weight 75 g were offered either a commercial feed or the same incorporated with 109 CFU g−1 of lactic acid bacteria Lactobacillus rhamnosus for 30 days; in the second study performed for a similar duration, fish of average weight 126 g were offered formulated diets
that either contained the same bacteria in heat-killed or freeze-dried form (nearly 1011 CFU g−1), or the basal diet without the bacteria. Blood samples were collected at different times after commencement of probiotic
feeding to determine the total cholesterol, triglyceride contents, the plasma alkaline phosphatase activity, plasma protein
and hematocrit value. The plasma cholesterol significantly increased upon probiotic feeding in the first experiment. A significant
elevation (P < 0.05) of plasma cholesterol and triglyceride and alkaline phosphatase activity level was found in the freeze-dried probiotic
fed groups at 20 and 30 days postfeeding. This was concomitant with the increased plasma protein and hematocrit values in
FD group at 20 and 30 days. Likewise, the heat-killed probiotic fed group registered significantly high values of triglycerides,
alkaline phosphatase activity, and plasma protein compared to the control diet fed groups after 20 days of feeding. Thus,
alterations in the blood profiles could serve as supplementary information when examining the benefits of probiotics for fish. |
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