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Dorada is a native fish of the Magdalena River and have good husbandry characteristics; despite these potential, few data have been published on captive management. This study aimed to evaluate the effect of two stocking densities on zootechnical parameters of dorada, using a commercial diet. For this a total of 7200 doradas of initial average weight 8 ± 0.5 g and 5 ± 1 cm of total length, was stocking in six ear then ponds of 800 m2with two treatments: T1 (1fish / m2) and T2 (2 fish / m2); daily growth (DG), weight gain (G) feed conversion (FC) and survival (% S) was evaluated. The water quality parameters, dissolved oxygen (DO mg / L), pH, temperature (T°C), alkalinity (Alk), hardness (Dz) (mg / L CaCO3) and total ammonium (mg / L NH3) were registered. A commercial concentrate starting with 38% crude protein (% CP) along the first month was used; 30% CP in these cond month and ending with 25% CP until day 80 follow-up. Analyses of water quality remained stable during the culture period: OD (6.5 ± 1.2 mg / L), pH (6 ± 1.4), T (24 ± 1.5 °C), Alk-Dz (17.8 mg CaCO3 / L) and total NH3 (0.002 mg / L). The results of zootechnical parameters were: weight and total length for T1 281.48 ± 36 g and 26.01 ± 1.06 cm, respectively; T2 298.17 ± 27 g and 26.2 ± 1.1 cm; gain period 273 g and 290 g in T1 and T2 respectively; Daily growth 3.41 gfor T1 and 3.6 g for T2. Feed conversion 1.17 and 1.01 for T1 and T2. The survival was 98% in both treatments; differences between treatments were not significant (p> 0.05). It can be concluded that stocking density did not affect the measured zootechnical parameters, however T2 performed better.

Ensayo preliminar de engorde de dorada (Brycon moorei Steindachner 1878) en dos densidades de siembra