Agossou Dehouegnon Jerry, Koluman Nazan
Department of Animal Science, Çukurova University, Adana, 01330, Turkey.
Arch Anim Breed. 2018 Dec 5;61(4):459-461. doi: 10.5194/aab-61-459-2018. eCollection 2018.
This study compared the effects of natural mating and artificial insemination using frozen buck semen on reproductive performance in Alpine goats. Sixty reproductive Alpine goats were grouped according to natural mating ( ) and artificial insemination ( ) breeding methods. Oestrus was synchronised in experimental goats using a vaginal sponge impregnated with 20 mg of progestogen FGA (fluorogestone acetate) for 11 days. At the time of sponge insertion, 150 g of prostaglandin F (PGF ) analogue was injected intramuscularly. Forty-eight hours prior to vaginal sponge withdrawal, 500 IU equine chorionic gonadotropin (eCG) was injected into the animals. At the end of synchronisation protocol, goats were fertilised using frozen semen or mated with a well-performing buck (ratio: 1 male to 5 females). The pregnancy (pregnant/synchronised goats) and mortality rates ( ) were higher (93 % vs. 70 %; 2 % vs. 4 %) in the naturally mated goats than the artificially inseminated group. Kids' live weight at birth was similar ( and kg) in both groups. The oestrus synchronisation followed by natural mating achieved better reproductive performance than the goats artificially inseminated using frozen semen. However, the artificially inseminated animals displayed an acceptable twinning rate.
本研究比较了自然交配和使用冷冻公羊精液人工授精对阿尔卑斯山羊繁殖性能的影响。60只处于繁殖期的阿尔卑斯山羊根据自然交配（ ）和人工授精（ ）的繁殖方法进行分组。使用浸有20毫克孕激素FGA（醋酸氟孕酮）的阴道海绵对实验山羊进行11天的发情同步处理。在插入海绵时，肌肉注射150微克前列腺素F （PGF ）类似物。在取出阴道海绵前48小时，给动物注射500国际单位的马绒毛膜促性腺激素（eCG）。在同步处理结束时，山羊使用冷冻精液进行受精或与一只性能良好的公羊交配（比例：1只雄性对5只雌性）。自然交配的山羊的怀孕率（怀孕山羊数/同步处理的山羊数）和死亡率（ ）高于人工授精组（93%对70%；2%对4%）。两组出生时羔羊的体重相似（ 和 千克）。发情同步后自然交配的山羊比使用冷冻精液人工授精的山羊具有更好的繁殖性能。然而，人工授精的动物表现出可接受的双羔率。
