■母羊的发情同步已使用几种方案实现,在提高繁殖效率和获得用于绵羊养殖的最有效方案方面取得了不同程度的成功。这项研究旨在比较三种治疗方案的有效性,并记录巴巴多斯黑腹(BBB)绵羊的发情体征的强度和持续时间以及怀孕率。
■将32例18~24个月的初产妇BBB母羊平均分为3个治疗组。T1:在第0天和第10天对母羊肌内注射2mLLutalyse(PGF2α)(10mg)。T2:在第0天,1mL费替林(50μg;Gonadorelin乙酸酯)和在第7天,2mLlutalyse(10mg)。T3:在第0天1mL费替林(50μg),在第7天2mL费替林(10mg),在第9天1mL费替林(50μg)。使用自然交配的公羊和母羊评估发情反应。在最后一次激素注射后的55至80天之间使用超声检查确定怀孕。注意到以下发情迹象:外阴肿胀,粘液排出,嗅探,兴奋,食欲不振,安装,和快速的尾巴运动。
■在表达的符号中,外阴肿胀最常见,而食欲不振和粘液排出是记录到的最不明显的迹象。发情反应(%),发病(%),三种治疗方案的母羊同步持续时间(h)为100%,58.3±23.4%,和48.0±18.2h(T1),100%,61.7±41.2%,45.0±27.0h(T2),和37.5%,32.1±1.7%,和29.2±1.25h(T3),分别。妊娠率为87.5%,87.5%,37.5%,T1、T2、T3和T4分别为50.0%。
■与GnRH+PGF2α+GnRH(OVS)方案相比,前列腺素F2α+PGF2α和GnRH+PGF2α同步方案在BBB母羊受精中更有效,发情体征表达更好。
UNASSIGNED: Estrus synchronization of ewes has been accomplished using several protocols with various degrees of success in improving reproductive efficiency and obtaining the most effective protocol used in sheep farming. This study aimed to compare the effectiveness of three treatment protocols and to record the intensity and duration of estrus signs and pregnancy rate in Barbados Black Belly (BBB) sheep.
UNASSIGNED: Thirty-two primipara BBB ewes aged 18-24 months were equally divided into three treatment groups. T1: the ewes were injected intramuscularly with 2 mL Lutalyse (PGF2α) (10 mg) on days 0 and 10. T2: 1 mL Fertiline (50 μg; Gonadorelin acetate) on day 0 and 2 mL lutalyse (10 mg) on day 7. T3: 1 mL fertiline (50 μg) on day 0, 2 mL lutalyse (10 mg) on day 7, and 1 mL Fertiline (50 μg) on day 9. Estrus response was assessed using naturally mating rams and ewes. Pregnancy was determined using ultrasonography between 55 and 80 days after the last hormonal injection. The following estrus signs were noted: Swollen vulva, mucus discharge, sniffing, excitement, loss of appetite, mounting, and rapid tail movement.
UNASSIGNED: Of the expressed signs, swollen vulva was most frequent, whereas loss of appetite and mucus discharge were the least overt signs recorded. The estrus response (%), onset (%), and duration (h) in ewe synchronization of the three treatment protocols were 100%, 58.3 ± 23.4%, and 48.0 ± 18.2 h (T1), 100%, 61.7 ± 41.2%, and 45.0 ± 27.0 h (T2), and 37.5%, 32.1 ± 1.7%, and 29.2 ± 1.25 h (T3), respectively. The pregnancy rates were 87.5%, 87.5%, 37.5%, and 50.0% in T1, T2, T3, and T4, respectively.
UNASSIGNED: Prostaglandin F2α+PGF2α and GnRH+PGF2α synchronization protocols were more effective in the fertilization of BBB ewes with better expression of estrus signs compared with the GnRH+PGF2α+GnRH (OVS) protocol.