Palabras clave
anestro estacional
actividad sexual
Cómo citar
Resumen
El objetivo del presente estudio fue determinar si la presencia de hembras estrogenizadas y machos sexualmente inactivos estimula la actividad estral de las cabras anovulatorias del norte de México, y si el porcentaje de hembras estrogenizadas afecta esta respuesta a mitad del anestro estacional. Se utilizaron tres grupos (n=31, c/u) de hembras anovulatorias expuestas a dos machos/grupo. Un grupo fue expuesto además a seis hembras estrogenizadas (G20 %), un segundo grupo fue expuesto a tres hembras estrogenizadas (G10 %), y el tercer grupo fue expuesto a seis hembras no estrogenizadas (G0 %). El porcentaje total de cabras que presentaron actividad estral durante el estudio fue similar entre los grupos G10 y G20 % (93 y 90 %, respectivamente, P>0.05), pero diferente en el grupo G0 % donde ninguna hembra presentó estro (P<0.01). El inicio de la actividad estral fue más tardía en el G10 % (167.8±17 h) que en el G20 % (142±20 h; P<0.001). Estos resultados indican que la presencia de hembras estrogenizadas al momento del efecto macho, estimula la actividad estral de las hembras anovulatorias locales del semidesierto mexicano, y además, que la presencia de un 20 % de hembras estrogenizadas reduce el lapso entre la introducción de machos + hembras estrogenizadas, y el inicio de la actividad estral o latencia al primer estro.
Citas
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