This research aimed at studying the economical effect of common carp (Cyprinus carpio LINNAEUS, 1758) settling of fingerlings with differenciated density and with artificial feeding and chemical fertilization. The design was entirely randomized with three treatments (1; 0.5 and 0.33 fishes/m²) evaluated along the time and 3 repetitions. The fish were stocked with medium weight and mediun length of 2.40 g and 5.35; 5.40 and 5.39 cm, respectively, in the treatments, and 45 days old. The diets were formulated with 27% PB and 2.925 kcal/kg of ration, being given daily in the quantities of 3% of living weight. The results for the length and weight of the fishes were 25.68; 28.66 and 31.21 cm and 255.00; 424.00 and 519.66 g, respectively. The economical analisys was studied through cost planning. In the total production, the results were 1882; 1513 and 1367 kg/ha in a cycle. In similar conditions all the studied densities coud be zootechnically recommended. The economical profitability of the activity is growing with the increase of density and there is unitary or mediun cost decrease.
Common carp; Cyprinus carpio; density; economical; fattering
