Efficacy of probiotics and biofloc system in maintenance of water quality and growth performance in shrimp Litopenaeus vannamei

Using a variety of external carbon sources, including molasses, tapioca, maize flour and sucrose in combination for the development of bio flocs, an attempt has been made to investigate the effects of adding both probiotics (Bacillus licheniformis and Lactobacillus rhamnosus ) and the Biofloc system on water quality parameters and the performance of Pacific shrimp, Litopenaeus vannamei , under a 15: 1 carbon to nitrogen ratio in the current experimental feeding trail. Feeding trail experiments were conducted with Seven Experimental diets including One Control, Probiotics added and Five Bioflocs developed with different external Carbon sources for a period of 60 days with L. vannamei . Due to the addition of combinations of both Probiotics and Bioflocs, maintain rigorous control of all the Water quality parameters and provide protection and resistance to the Candidate species of culture i.e. all the Water quality parameters were ideally maintained. Intense mechanical aeration also favours degradation of toxic nitrogen and other compounds by the microbial community that additionally serve as a food supplement for shrimp, thereby Productivity rates were substantially increased. Therefore, BFT is an efficient alternative against pathogens, maintenance of water quality at optimum levels and enhances survival and growth of shrimp L. vannamei . The combined use of both Probiotics and Bioflocs in the present study not only maintains a good Water quality parameters and also Growth performance in L. vannamei .