Desempeño reproductivo del bocachico Prochilodus magdalenae inducido dos veces en un mismo año

Objective. To evaluate the reproductive performance of hormonally induced bocachico with carp pituitary extract (CPE) twice in the same year. Materials and methods. 23 females, in their final maturation phase, were induced with 5 mg EPC/Kg of body weight in two applications, initially 10% and 90% twelve hours later. Males was applied 80% of the total female dose. Results. After the first hormonal induction, females were fit again at 97.6±12.4 days. Ovulation rate in both hormonal inductions was 0.91 (21/23). Absolute fecundity (g-oocytes/female) showed no significant differences between the first and second induction (36.2 and 44.6 g oocytes/female, respectively) (p>0.05), but when expressed in number of oocytes per female there was a significant difference (p0.05); pero cuando se expresó en número de ovocitos/hembra se observó diferencia significativa (p<0.05), siendo mayor en la primera inducción (53535 ovocitos/hembra) que en la segunda (40658 ovocitos/hembra). La fecundidad relativa, expresada tanto en g-ovocitos/Kg-hembra como ovocitos/Kg-hembra, mostraron diferencia significativa, siendo mayor en la primera inducción (p<0.05). La tasa de fecundación (73.9±19.6%) y eclosión (56.9±17.9%) fueron mayores en la primera inducción, comparadas con la segunda (55.6±21.1% y 35.6±20.7%, respectivamente) (p