Benefits of Polyphenol-Based Synbiotics in Crustacean Diet

Here, the olive leaf extract (OLE) rich in polyphenols was employed as a prebiotic agent, together with Lactobacillus reuteri and Bacillus clausii, to develop synbiotics. The effect of on probiotic strains tested at concentrations 0, 50, 100, 400, 1000 μg mL−1, also 20 40 mg mL−1. Olive mL−1 showed best activity L. B. clausii. A basal diet two experimental synbiotic-containing diets were prepared. synbiotic manufactured by adding 5 × 106 CFU g−1 + clausii 0.25 OLE 1 107 OLE. administered freshwater crayfish Astacus astacus (1.35 ± 0.04 g) an 84-day feeding trial. containing significantly improved (p < 0.05) final weight, specific growth rate, body condition, survival rate. significant Enterobacteriaceae, which include proven beneficial activities for intestinal health general animal welfare, increased fed obtained results could be suitable functional feed development farming.