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Influence of Probiotic Administration, Dominant Gut Bacterial Strain Bacillus subtilis on Growth Performance of Labeo rohita (Hamilton) Fingerlings

Akansha Bisht1 and Nityanand Pandey2
1. College of Fisheries, G B Pant University of Ag. & Tech. Pantnagar 263145, Uttarakhand
2. Directorate of Coldwater Fisheries Research, Bhimtal-263136, Nainital, Uttarakhand
Abstract—The growth of aquaculture as an industry has accelerated over the past decades; this has resulted in environmental damages and low productivity of various crops. The need for increased disease resistance, growth of aquatic organisms, and feed efficiency has brought about the use of probiotics in aquaculture practices. The objective of present study was to evaluate the effect of dietary administration of Bacillus subtilis, the dominant bacteria in the gut of fish on weight gain, growth performance and survival of Labeo rohita fingerlings. Fingerlings of average weight 3-4 g were divided into four experimental groups each with three replicates. Tanks T1, T2, T3 were fed with prepared diets (30±0.4% crude protein) incorporated with isolated intestinal bacteria Bacillus subtilis at three different levels (1x105, 1x108 and 1 x 1010 cells g-1 respectively). T0 was control group. The experiment was conducted for 90 days. The results demonstrated that fish group (T2) supplemented with Bacillus subtilis at the level of 1 x 108  cells g–1 showed significant improvement in growth parameters (Body weight gain, Specific Growth Rate, Condition Factor and RNA DNA ratio, food conversion efficiency) and survival in comparison to other fish groups. Hence, Bacillus subtilis can be used as growth promoting probiotic in the diet of Labeo rohita fingerlings. Better results for weight gain, growth performance, survival and feed utilization can be achieved by administering Bacillus subtilis at the level of 1 x 108 cells g–1

Index Terms—bacillus subtilis, labeo rohita, fingerlings, growth

Cite: Akansha Bisht and Nityanand Pandey, "Influence of Probiotic Administration, Dominant Gut Bacterial Strain Bacillus subtilis on Growth Performance of Labeo rohita (Hamilton) Fingerlings," International Journal of Life Sciences Biotechnology and Pharma Research, Vol. 2, No. 3, pp. 386-392, July 2013.
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