The effects of natural mating and artificial insemination using cryopreserved buck semen on reproductive performance in Alpine goats
2018
D. J. Agossou | N. Koluman
This study compared the effects of natural mating andartificial insemination using frozen buck semen on reproductive performancein Alpine goats. Sixty reproductive Alpine goats were grouped according tonatural mating (<span class="inline-formula">n=30</span>) and artificial insemination (<span class="inline-formula">n=30</span>) breedingmethods. Oestrus was synchronised in experimental goats using a vaginalsponge impregnated with 20 mg of progestogen FGA (fluorogestone acetate) for 11 days. At the time ofsponge insertion, 150 <span class="inline-formula">µ</span>g of prostaglandin F<span class="inline-formula"><sub>2α</sub></span> (PGF<span class="inline-formula"><sub>2α</sub></span>) analogue was injectedintramuscularly. Forty-eight hours prior to vaginal sponge withdrawal,500 IU equine chorionic gonadotropin (eCG) was injected into the animals. At the end of synchronisationprotocol, goats were fertilised using frozen semen or mated with awell-performing buck (ratio: 1 male to 5 females). The pregnancy(pregnant/synchronised goats) and mortality rates (<span class="inline-formula">P<0.05</span>) werehigher (93 % vs. 70 %; 2 % vs. 4 %) in the naturally mated goats than theartificially inseminated group. Kids' live weight at birth was similar(<span class="inline-formula">3.83±0.23</span> and <span class="inline-formula">3.15±0.11</span> kg) in both groups. The oestrussynchronisation followed by natural mating achieved better reproductiveperformance than the goats artificially inseminated using frozen semen.However, the artificially inseminated animals displayed an acceptable twinning rate.
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