The current studywas aimed at investigating the use of different fertilizers - dicalcium phosphate,biosolid and quail feces - as a strategy for water fertilization in Daphniasp production. It was used twenty-four 100-L tanks of asbestos cement distributedin a completely randomized split-plot design with six replicates, with plotsin the three kinds of fertilizers (biosolid, dicalcium phosphate, and quailfeces) and a control without fertilization (WF) and subplots at the times ofassessment (days 8 and 13). It was assessed the biomass production of Daphniasp. and the following water quality parameters: chlorophyll a, electrical conductivity,pH, dissolved oxygen, temperature, ammonia and organic nitrogen, total phosphorusand total hardness. There was a significant correlation between the values ofchlorophyll a and biomass weight of Daphnia sp, which indicates interactionsbetween phytoplankton and zooplankton communities. The maximum weight of Daphniasp. biomass is found in tanks fertilized with quail feces (35.98 g), followedby the biosolid (16.80 g), control without fertilization (6.75 g) and dicalciumphosphate (5.24 g).
