Effect of Lactobacillus plantarum and Lactobacillus delbrueckii subsp. bulgaricus on growth performance, gut microbial flora and digestive enzymes activities in Tor grypus (Karaman, 1971)

In this study, two main probiotics (Lactobacillus plantarum and Lactobacillus delbrueckii subsp < em>. bulgaricus) were isolated from the intestine of Tor grypus and their effects on growth performance, gut microbial flora and digestive enzymes activities (i.e., α-amylase, lipase, trypsin, chymotrypsin, and alkaline phosphatase) of Tor grypus (Karaman, 1971) were determined. Juveniles of T. grypus (n=480, weighing 45±10 g) were randomly divided into 4 equal  groups (with 3 replications) and fed on diets containing 5×107 cfu g-1 of L. plantarum (G1), L. bulgaricus (G2), L. casei (G3) and a control diet (without probiotic) for 60 continuous days. Results showed that probiotic supplementations had generally significant effects on growth performance (p