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Abstract

This work emphasized the growth performance of the prawn, Macrobrachium rosenbergii post larvae (PL) supplemented with a probiotic bacterium, Bacillus licheniformis at five different serially diluted concentrations (10 -2 , 10 -4 , 10 -6 , 10 -8 and 10 -10 ) respectively. After 90 days of feeding trial, in 10 -6 (CFU, 935x10 -6 ) dilution supplemented feed fed prawn produced significantly (P<0.05) increased survival rate, growth rate, contents of total protein, amino acid, carbohydrate, lipid and digestive enzymes activities (protease, amylase and lipase)when compared with control. The gut microfloral study showed the presence of Pseudomonas sp., Klebsiella., Escherichia coli., Bacillus sp., Streptococcus sp., Staphylococcus sp., Citrobacter sp., and Acinitobacter sp., in control prawn. The gut of experimental PL fed with B. Licheniformis showed presence of Bacillus sp., Lactobacillus sp., E. coli., Streptococcus sp., and Citrobacter sp. Thus, the pathogenic bacteria, such as Pesudomonas sp., Klebsiella sp., Staphylococcus sp., and Acinitobacter sp., were found to be competitively excluded in B. licheniformis supplemented feed fed prawn's gut.

Probiotics in the rearing of freshwater prawn Macrobrachium rosenbergii (de Man, 1879) in a biofloc system

“…Studies verify that after establishment in the intestinal region of the host, probiotic bacteria increase the concentration of enzymes. High enzymatic activity contributes to the significant increase in the digestion of essential amino acids, proteins, carbohydrates and lipids, which positively influence in survival, feed conversion and consequent production of prawns (Sudha et al, 2019).…”