Pimprasert Maruay, Kheawkanha Theerapat, Boonkum Wuttigrai, Chankitisakul Vibuntita
Department of Animal Science, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, Thailand.
Network Center for Animal Breeding and Omics Research, Faculty of Agriculture, Khon Kaen University, Khon Kaen 40002, Thailand.
Animals (Basel). 2023 Feb 6;13(4):573. doi: 10.3390/ani13040573.
This study aimed to determine the effects of the frequency of semen collection (once, twice, and thrice weekly) and seasonal variations on the fresh and frozen semen quality of Thai native roosters throughout the year. Data on temperature and humidity were collected and used to calculate the temperature-humidity index (THI). The average temperature and THI were lower in the winter than in the rainy season and the summer ( < 0.05). In contrast, the average relative humidity was not different among the seasons but was higher in the rainy season ( > 0.05). None of the fresh or frozen semen quality parameters were influenced by the frequency of semen collection, but the season did have an effect. The highest sperm concentration was obtained in the winter ( < 0.05). In contrast, the lowest sperm concentration was found during the rainy season, which presented the highest humidity. Regarding the frozen semen quality, the highest malondialdehyde concentration and the lowest motility were found in the summer ( < 0.05). In conclusion, semen collection can be conducted thrice per week for a consecutive year without affecting semen quality while maximizing sperm production. However, the highest sperm production was obtained in the winter, which is also a suitable season for producing semen for cryopreservation.
本研究旨在确定采精频率（每周一次、两次和三次）以及季节变化对泰国本土公鸡全年新鲜精液和冷冻精液质量的影响。收集了温度和湿度数据，并用于计算温湿度指数（THI）。冬季的平均温度和THI低于雨季和夏季（<0.05）。相反，各季节的平均相对湿度没有差异，但雨季相对湿度较高（>0.05）。新鲜精液或冷冻精液的质量参数均不受采精频率的影响，但季节确实有影响。冬季获得的精子浓度最高（<0.05）。相反，在湿度最高的雨季发现精子浓度最低。关于冷冻精液质量，夏季丙二醛浓度最高，活力最低（<0.05）。总之，连续一年每周可采精三次，而不影响精液质量，同时可使精子产量最大化。然而，冬季精子产量最高，冬季也是生产用于冷冻保存精液的适宜季节。
