Acta Scientific Veterinary Sciences (ISSN: 2582-3183) Volume 4 Issue 2 February 2022 Effect of Dietary Probiotics (Lactobacillus acidophilus) on the Growth Performance of Labeo Rohita Amit Sharma, S Kumar and S.K. Raghuvanshi* P.G. Department of Zoology, Bareilly College, MJP Rohilkhand University, Bareilly, UP, India *Corresponding Author: S.K. Raghuvanshi, Department of Zoology, Bareilly College, Bareilly, Utter Pradesh, India. Research Article Received: January 25, 2022 Published: January 31, 2022 © All rights are reserved by S.K. Raghuvanshi., et al. Abstract The present study was carried out to evaluate the influence of dietary supplementation of probiotic bacteria (Lactobacillus aci- dophilus), on growth performance of Labeo rohita. The probiotic L. acidophilus was procured from the market and the feed was pre- pared by crushing the basal food with probiotic bacteria in different combinations. The feeding trials were conducted in triplicate for 60 days, to determine the effect of dietary probiotics on growth status of fish. For this, the live fishes (L. rohita) were captured from Sagar Taal, Budaun, U.P. After acclimatization for 10 days, the fishes with similar body weight were distributed randomly into five treatment groups at Department of Zoology, Bareilly College, Bareilly, U.P. These fishes were given basal feed containing L. acidophilus in five concentrations viz., 0.5 (T 1 ), 1.0 (T 2 ), 1.5 (T 3 ), 2.0 (T 4 ) and 2.5 (T 5 ). The control group (T 0 ) was fed basal food only, without L. acidophilus for the same period. Growth was analysed by measuring body length and weight, after the interval of every 15 days (at 15, 30, 45 and 60 days). Two treatment groups (T 4 and T 5 ) showed better growth of fishes, than any other treatment group. Group T 4 showed a weight gain of 20.51 ± 0.64%, while the percentage length gain was 16.40 ± 0.43%. Similarly, the performance of group T 5 was also found good (weight gain 20.22 ± 0.61%, length gain 17.05 ± 0.08%). On the other hand, the results of control treatment were comparatively poor (weight gain 19.50 ± 0.49%, length gain 15.37 ± 0.08%). These results suggest that L. acidophilus can be used as an effective probiotic @ 2% or more in the form of dietary supplement, for L. rohita in aquaculture practices. Keywords: Feed, Probiotic; Lactobacillus; Growth Performance; Labeo rohita Introduction Aquaculture possesses great potential to meet the increasing demands of the world in terms of high biological-value protein. Now a days, advanced rearing techniques and practices of nutri- tional improvement have promoted the aquaculture at large scale [1-4]. Aquaculture production in India has shown remarkable growth during the past six decades from a very small amount of 0.75 million tons in 1950-51 to 9.38 million tons in 2012-13 [5]. In India, freshwater fin fish production is dominated by three Cyp- rinid species, namely, rohu (Labeo rohita), catla (Catla catla) and mrigal (Cirrhinus mrigala), which contribute about 87% of the to- tal freshwater fish production [6]. Labeo rohita (rohu) is an impor- tant freshwater fish and most preferred species usually cultured in Asia, specifically in the Indian subcontinent, because of the rapid growth and higher adequacy to consumers [7,8]. India is by far the largest producer of rohu followed by Bangladesh and Myanmar [9]. The appearance of diseases is a major obstacle in sustainable aquaculture production [10]. The conventional technique for dis- ease control, such as antibiotics and antimicrobial drugs, are being used since last few years, but they have limited success in prevent- ing fish diseases. Probiotics, therefore, are a good strategy for con- trolling the microbial infections with a great potential to replace antibiotics [11,12]. Citation: Sharma, et al. “Effect of Dietary Probiotics (Lactobacillus acidophilus) on the Growth Performance of Labeo Rohita". Acta Scientific Veterinary Sciences 4.2 (2022): 88-95.