Resumen

MARTINEZ-ROJERO, Rubén D. et al. Intrauterine artificial insemination in creole goats with cooled semen. Agrociencia [online]. 2006, vol.40, n.1, pp.71-76. ISSN 2521-9766.

The objective of the present study was to evaluate the fertility rate and prolificity index of Creole goats, either inseminated into the uterus with cooled semen, or served by natural mating. The study took place during the breeding season. Goats were synchronized with intravaginal sponges containing 40 mg of flurogestone acetate (FGA) during 11 d, plus an intramuscular injection of equine corionic gonadotropin (eCG) when sponges were withdrawn. Goats were served either by natural mating (n=41) or inseminated into the uterus by laparoscopy (n=40) with cooled semen 24 h after estrus was detected. Data were analyzed by χ2 tests and variance analysis. The fertility rate (82.5%) obtained by natural mating was higher (p≤0.05) than that obtained by artificial insemination (67.5%). No differences were found (p>0.05) for the prolificity rate between natural mating (1.20±0.41 kids per goat) and artificial insemination (1.18±0.39 kids per goat). It is concluded that a moderate fertility was obtained by cooled semen, however, it was lower than that registered for natural mating. Prolificity index was not affected by the form in which goats were served.

Palabras llave : Capra hircus; cooled semen.

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