Evaluación del cultivo de dorada (Brycon sinuensis Dahl, 1955) en estanques a diferentes densidades de siembra

the dorada′s culture (brycon sinuensis) to different stocking densities was evaluated. the length and stocking weight were: 4.6±0.1 cm fork length (fl) and 1.6±0.2 gram (g), and 14.2±0.4 cm fl and 42.5±7.2 g at growing and finishing phases, respectively. commercial concentrated with 24% of gross protein and 2600 kcal/kg was offered and the time′s culture were 129 days. the physical- physical-chemical parameters were: dissolved oxygen, 3.1±0.5 mg/l; temperature, 30.4±0.1 °c; ph, 5.8±0.2; dissolved total solids, 73.7±1.1 mg/l and conductivity, 148.0±2.3 μs/cm. the best values for growth in length and weight were: 14.7±1.3 cm fl (t1) and 45.4±10.2 g (t1) and 20.2±1.2 cm fl (t2) and 116.8±18.8 (t2) g at growing and finishing phases, respectively, without significant differences between treatments (p>0.05). the growth′s rates were similar and very low; the survival was very low at growing phase (20.6%±18.8), increasing at finishing phase, (98.1%±0.4); and the best yield in biomass were of 3842.3 g (t3) and 6253.2 g (t3) at growing and finishing phases, respectively. in general, it is inferred that the treatment 3 reached the best results, that the dissolved oxygen, the temperature and the ph of the ponds′s water affected the growth and development of fishes, and that the dorada didn？t assimilate efficiently the diet offered during the culture, because the consumed food was used for the maintenance or survival and it doesn？t for the growth.