• Shivaji G Jetithor
• Datta A.Nalle

Abstract: In present investigation we were designed five experimental diets with containing changeable concentration of probiotic (Lactobacillus acidophilus) like 0.20,0.40,0.70 and 1.0% were formulated using full fat soybean as the protein source. Labeo rohita fingerling were obtained from local fish supplier and kept in glass aquaria (40x20x20cm) with aeration facilities in the laboratory where the temperature was kept as 27+1.c ,.(Mean body weigh 2.90 ± 4.0 g) were arbitrarily distributed among the aquaria, with 10 fish per aquarium. Each diet treatment was tested in replicate of four (Four aquaria per diet). All fish were fed twice daily. The feeding rate was at 5 percent of body weight per day for the whole rearing period of 60 days, and the amount of feed was adjusted every tenth day following a bulk weighing of each group of fish. The fish were exposed to their respective diet for 4h during each ration, Fish growth, digestibility and nutrient retention result shows that, survival was not affected by the inclusion levels of probiotic. Growth performance (in terms of live weight gain), growth percent gain in BW and final length), SGR and nutrient retention (PER, GPR, GER and APD)] increased when dietary probiotic level were increased from 0.20g to 0.70g 100g-1 of diet; further increase in dietary probiotic level (>0.70g 100g-1) resulted in a significant (P<0.05) growth depression and nutrient depletion. Apparent protein digestibility was significantly (P<0.05) higher in fish which were fed diets containing probiotic at 0.70g 100g-1 than in fish fed probiotics free diet (Control) or diets containing low or high levels of lactobacillus acidophillus. FCR values observed were also significantly (P<0.05) lower in fish fed diet containing Lactobacillus acidophillus at 0.70g 100g-1 than fish fed other dietary preparations including control diet.

Key words: Lactobacillus acidophillus, growth performance, Labeo rohita

"Effectual employment of Probiotics supplements on growth performance of labeo rohita fingerlings.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org), ISSN:2349-5162, Vol.8, Issue 4, page no.380-383, April-2021, Available :http://www.jetir.org/papers/JETIR2104150.pdf

"Effectual employment of Probiotics supplements on growth performance of labeo rohita fingerlings.", International Journal of Emerging Technologies and Innovative Research (www.jetir.org | UGC and issn Approved), ISSN:2349-5162, Vol.8, Issue 4, page no. pp380-383, April-2021, Available at : http://www.jetir.org/papers/JETIR2104150.pdf