“…The present results indicated that the higher intestinal enzyme activities obtained with diets containing 1 × 10 6 CFU/g L. delbrueckii improved the digestion of protein, starch and fat, which in turn explain the better growth observed with the L. delbrueckii ‐supplemented diets. Similar effects have been reported for other fish, in which digestion was shown to increase considerably in response to probiotics in the diets (Adorian et al, ; Fang, Ma, Ji, Ren, & Mims, ; Nimrat, Tanutpongpalin, Sritunyalucksana, Boonthai, & Vuthiphandchai, ; Suzer et al, ; Talpur et al, ; Wang et al, ; Yengkokpam et al, ; Zhou, Wang, & Li, ). The enhanced digestive enzyme activities might be partially attributed to the extracellular enzymes secreted by L. delbrueckii because Gram‐positive bacteria could secrete a wide range of enzymes (Moriarty, ).…”