Propolis extract as a feed additive of the Nile tilapia juveniles

ABSTRACT This study was conducted to investigate the effects of dietary propolis alcohol extract supplementation on growth performance, digestibility, intestinal morphometry, and physiologic parameters Nile tilápia (Oreochromis niloticus L.) juveniles. For performance experiment 120 fish averaging 1.41±0.3g were randomly distributed into 24 tanks (70L each) in a closed recirculation water system with constant aeration biofilter. The animals four treatments using completely randomized design six replicates per treatment. consisted pellet feeds different concentrations (AEP) (0.0, 0.5, 1.0 1.5gkg-1). period for 45 days. digestibility experiment, an inert marker feed adapted Guelph feces collecting used. results showed no differences parameters, crude protein apparent dry matter feeds, parameters. However, there increasing linear effect energy PAE feed. usage levels 1% is recommended optimum villus morphometry tilapia.