Abstract:
The aim of this paper was to test the effectiveness of an estrus synchronization method during the reproductive season in goats kept under extensive conditions as well as to evaluate the effectiveness of natural breeding versus artificial insemination with freshly collected and diluted semen. Estrus synchronization was performed using 2 successive administrations of PGF2alpha in 20 cycling does. Next, 2 groups of 10 does and 2 fertile bucks each were randomly created. In group 1 the females were naturally covered by the two bucks, as soon as heats were expressed. In group 2 semen was collected from the two bucks by electroejaculation, diluted using an original extender based on skimmed milk and artificial insemination was performed. Pregnancy diagnosis was performed in all females using ultrasounds and all pregnancies were monitored until full term. Thus, after performing estrus synchronization followed by natural breeding or artificial insemination in the two experimental groups, the following reproductive indices were obtained: group 1: conception rate 80% and prolificity 170%; group 2: conception 90% and prolificity 220%. The two biotechnologies - estrus synchronization and artificial insemination - are thus complementary, with a major advantage resulting from grouped parturitions, which fully justifies their use in goats breeding.
