ABSTRACT
Athirty days experimental trial was performed to investigate the effect of aerobic microbial floc system and aerobic microbial floc/ biofloc incorporated feed on water quality, growth performance, survival and the digestive enzyme activity of the Penaeus vannamei in 30-tonnes raceways. To encounter the growing food demand of the rapidly growing haman population the shrimp farming industry is likely to shift from semi intensive rearing to intensive rearing systems with multiple crops/year. Intensive aquaculture systems efficiently produce dense biomass of shrimp and fish. Aerobic microbial floc technology has been gaining importance and found to be lucrative for treating in-situ culture water without affecting the shrimp production. The physicochemical parameters of water from the experimental groups has been analyzed daily for the whole experimental period. Visual analysis of water quality, such as color and flocculation was also observed daily. Amylase activity assay was done according to 3,5 dinitrosalicylic acid colorimetric method by Clark using starch as the substrate.
