than 6%. At that time significant i

than 6%. At that time significant improvements due to probiotics
administration were observed: A1 animals weighed significantly
more and had an increased daily growth index (DGI) than control
animals; feed conversion ratio (FCR) was significantly lower than
control in A1 and B2 groups while protein efficiency ratio (PER) was
significantly higher in A1, B1 and B2 diets. Voluntary feed intake
(VFI) was significantly lower in animals fed A2 and B2 diets
comparing to control fish.