Characterization of the major classes of digestive enzymes (amylase, protease and lipase) in the pyloric caeca and
intestine of an omnivorous, white seabream(Diplodus sargus) and a carnivorous,meagre (Argyrosomus regius) fish
species was assessed in response to dietary brewer's spent yeast (BSY, Saccharomyces pastorianus) supplementation.
For that purpose, three isonitrogenous (50%) and isolipidic (12%) diets were formulated: unsupplemented
(control) or supplemented with BSY at 1 or 2%. White seabream exhibited lower proteolytic but higher amylase
and lipase activities than meagre. In white seabream, BSY administration enhanced amylase and protease activities
in the pyloric caeca and the intestine and lipase activity in the pyloric caeca, while in meagre, improvement on
amylase activity in the pyloric caeca was observed with the 2% BSY diet. The results of the current study indicate
that white seabream has higher ability to digest non-protein energy sources than meagre and that diet supplementation
with BSY improved digestive capacities in both species.