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Abstract
The study was developed in the fish culture station “Las Tallas” attached to the Regional Corporation of Cauca, located in the geographic coordinates: latitude 02° 06’ 22” N and longitude 077° 25’ 15.4”W, to an altitude of 670 m.a.s.l, average annual precipitation of 2000 mm, an average temperature of 25.24°C. Thirty six adult fish were evaluated, with an average weight of 217.91±48.14 g and total length of 31.7±2.83 for de female fish, and an average weight of 137.20±13.18 g for the male fish with total length of 26.97±0.86 cm. A completely radom design was used, made up of four treatments distributed in the following way: T0 natural reproduction, T1 5.5 mg/kg of extract of hypophysis (EPC), T2 5 IU/g of Human Corionic Gonadotropin (hCG), and the T3 with 2 IU of hCG/g and 4 mg/kg of EPC. The T0 did not present positive answer. The rest of the treatments were 100% effective in the artificial reproductive process, estimating the hormones effect in relation to the ovulation index, number of oocytes, percentage of fertilization and hatch. Considering the weight as a co- variable in the number of mature oocytes obtained, it was determined that T2 produced a greater amount of ovules (332,602 oocitos/kg) with statistical significance (P<0.05). However, the fertilization and hatching percentages did not present significant differences between T1, T2, T3 treatments, in such a way that the percentage of fertilization was 32% for T1; 31.09% for T2; 32.5% for T3. The hatching percentage was 12% for T1, 9.43% for T2, 11% for T3. As far as the economical analysis is concerned, it was established that treatment T1 registered the best relation cost-profit.
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