The effects of natural mating and artificial insemination using cryopreserved buck semen on reproductive performance in Alpine goats

Abstract

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 (n = 30) and artificial insemination (n = 30) 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 µg of prostaglandin F 2α (PGF 2α ) 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 (P < 0.05) 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 (3.83 ± 0.23 and 3.15 ± 0.11 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.

Cryobank: Giải pháp khôi phục nhanh đàn vật nuôi sau dịch bệnh

“…Ở trên heo, quá trình thủy tinh hóa giảm rõ rệt khả năng vận động, khả năng tồn tại và tính toàn vẹn acrosome của tinh trùng (Arraztoa et al, 2017;My và ctv., 2021). Kết quả giảm chất lượng tinh trùng sau khi giải đông cũng có kết quả tương tự, hiệu quả thấp hơn so với phương pháp đông lạnh chậm cũng ở cừu, dê, gia cầm ( Long et al, 2010);Jiménez-Rabadán et al, 2015;Agossou & Koluman, 2018).…”

Effect of eCG dose on ovarian haemodynamics, hormonal profiles and prolificacy rate when oestrus was induced during low‐breeding season in Beetal goats

“…Goat reproduction is affected by seasonality, where the normal breeding season occurs when days are shorter, followed by a period of anestrous, and consequently, a decline in reproduction is observed when days are longer (Fatet et al, 2011); therefore, seasonality is considered as a major limiting factor. It has shown that pregnancy rate was higher during high‐breeding season compared with low‐breeding season (LBS), and this leads to a continuous struggle to optimize strategies for the improved reproduction during LBS in goats (Agossou & Koluman, 2018). In the past, administration of exogenous melatonin along with the presence of males resumed the reproductive performance during LBS; however, it negatively affected the resumption of ovarian activity during the breeding season (Zarazaga et al, 2009).…”

Validation of double freezing protocol for Beetal buck (Capra hircus) spermatozoa

“…Semen cryopreservation is a routine practice in goats, followed by artificial insemination (AI), and it is regarded as a vital approach for establishing the genetic resource bank (Lv et al, 2019). Yet, it offers great challenges for achieving high‐quality sperm viability and subsequently its reproductive performance (Agossou & Koluman, 2018), so differnt cryopreservation protocols have been investigated in this context.…”

“…Yet, it offers great challenges for achieving high-quality sperm viability and subsequently its reproductive performance (Agossou & Koluman, 2018), so differnt cryopreservation protocols have been investigated in this context.…”