标题：Dry biomass of Aspergillus niger in commercial diets for juveniles of Nile tilapia (Oreochromis niloticus) in the intermediate growth phase (15 to 70g)
出版社：Grupo de Pesquisa Metodologias em Ensino e Aprendizagem em Ciências
摘要：The objective of the present study was to evaluate different inclusion levels of drymass of the yeast Aspergillus niger (0; 0.125; 0.250; 0.500; 1.00; 2.00; 4.00 and 8.00%) in commercial diets for juveniles of Nile tilapia (16.11 ± 1.74g) in a water recirculation system. The productive performance, organosomatic indexes and carcass composition of these animals were evaluated after 58 days of experiment. A total of 192 juveniles were distributed among 32 tanks made up of eight treatments with four repetitions. A significant difference was observed for the hepatosomatic index at 2.00% of inclusion, which was similar to the other treatments except for the 0.125% inclusion level. The inclusion of A. niger had no negative impacts on performance when compared with the control diet. Since it is a by-product, the use of A. niger can be an alternative in the formulation of diets for tilapia in the initial stages (15-70g).
