Bahadi Majdi Ahmed, Al-Badwi Mohammed Abdo, Samara Emad Mohammed, Abdoun Khalid Ahmed, Alhidary Ibrahim Abdullah, Al-Haidary Ahmed Abraham
Department of Animal Production, College of Food and Agriculture Sciences, King Saud University, Riyadh, Saudi Arabia.
Anim Reprod. 2023 Apr 21;20(1):e20220051. doi: 10.1590/1984-3143-AR2022-0051. eCollection 2023.
There is a paucity of information with respect to group-training for artificial vagina and its influence on semen characteristics and sexual behavior of young untrained rams. A total of 18 healthy Najdi rams (with an initial body weight of 40-45 Kg and 7-8 month-old) were consequently used herein to test the usefulness of group-training for artificial vagina-mediated semen collection during the breeding season. Rams were randomly segregated into three groups ( = 6 rams per protocol), and the whole experiment was lasted for 10 weeks. The 1 group was subjected to a training protocol where one untrained ram was placed for 20 min with a teaser ewe, while the 2 group were subjected to a protocol where one untrained ram was placed for 20 min with one trained ram and a teaser ewe, whereas the 3 group were subjected to a protocol where three untrained rams were placed for 20 min with one trained ram and a teaser ewe. The obtained results clearly ( < 0.05) showed that training young rams in group has increased their sperm concentration and sexual stimulation, shortened the period of their training time, and descriptively had a complete training efficiency. The sexual stimulation of young untrained rams was intensified by the competition between rams in the co-presence of a trained ram. Collectively, these data may suggest that group-training of rams at puberty is a better protocol for AV-mediated semen collection compared to individual training. Some shortcomings were noted herein, but research dealing with this subject may very well improve the reproductive performance of young untrained rams.
关于人工阴道群体训练及其对未训练年轻公羊精液特征和性行为的影响，目前信息匮乏。因此，本研究共使用了18只健康的纳吉迪公羊（初始体重40 - 45千克，7 - 8月龄），以测试在繁殖季节通过群体训练使用人工阴道采集精液的有效性。公羊被随机分为三组（每组6只公羊），整个实验持续10周。第1组采用的训练方案是将一只未训练的公羊与一只诱情母羊放置在一起20分钟，而第2组采用的方案是将一只未训练的公羊与一只训练过的公羊和一只诱情母羊放置在一起20分钟，第3组采用的方案是将三只未训练的公羊与一只训练过的公羊和一只诱情母羊放置在一起20分钟。所得结果清晰显示（P < 0.05），群体训练年轻公羊可提高其精子浓度和性刺激，缩短训练时间，并在描述上具有完全的训练效率。在有训练过的公羊在场的情况下，公羊之间的竞争增强了未训练年轻公羊的性刺激。总体而言，这些数据可能表明，与个体训练相比，青春期公羊的群体训练是人工阴道介导精液采集的更好方案。本研究中指出了一些不足之处，但针对该主题的研究很可能会改善未训练年轻公羊的繁殖性能。
