The objective of the research was to improve the productive parameters in Creole chickens through gonadectomy in the Tungurahua Province, Ecuador. A completely randomized design with three treatments and a control was used, the results were subjected to an analysis of variance (ADEVA) for the separation of means and the Tukey test of 5%, the factors under study were: T1 (8), T2 (9) and T3 (10), castrated weeks of age, and uncastrated chickens (20 birds / treatment), with a productive period after castration of 12 weeks. Weight gain 12 weeks after castration was higher in chickens operated on at 8 weeks of age, (343.6 g bird / week, p <0.05). The lowest feed consumption was in week 3 post castration (p <0.05). Roosters castrated at 8 and 9 weeks had better feed conversion (6.33 and 6.53, respectively) (p <0.05). Carcass yield was higher in castrated roosters compared to the uncastrated control group (p <0.01). The mortality. It was better in T1 (8 weeks old) with 0%. For this reason, the application of the surgical technique performed at of age is the most recommended.
El objetivo de la investigación fue determinar la edad propicia para mejorar los parámetros productivos en pollos criollos mediante la gonadectomía en la Provincia de Tungurahua, Ecuador. Se utilizó un diseño completamente al azar con tres tratamientos y un testigo, los resultados se sometieron a un análisis de varianza (ADEVA) para la separación de medias y la prueba de Tukey 5%, los factores en estudio fueron: T1 (8), T2 (9) y T3 (10), semanas de edad castrados, y pollos sin castrar (testigo), (20 aves/tratamiento), con un periodo productivo posterior a la castración de 12 semanas. La ganancia de peso a las 12 semanas de la castración fue mayor en pollos intervenidos a las 8 semanas de edad, (343.6 g ave/semana, p<0.05). El menor consumo de alimento fue en la semana 3 post castración (p<0.05). Los gallos castrados a las 8 y 9 semanas registraron mejor conversión alimenticia (6.33 y 6.53, respectivamente) (p<0.05). El rendimiento a la canal fue superior en los gallos castrados con respecto al grupo control no castrado (p<0.01). La tasa de mortalidad fue mejor en el T1 (8 semanas de edad) con 0%. Por tal motivo la aplicación de la técnica quirúrgica realizada a menor edad es la más recomendada.
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