Adjassin Josias Steve, Assani Alassan Seidou, Bani Abou Adam, Sanni Worogo Hilaire Sorébou, Adégbeïga Alabi Cham Donald, Comlan Assogba Brice Gérard, Virgile Azando Erick Bertrand, Alkoiret Ibrahim Traoré
Laboratory of Ecology, Health and Animal Productions (LESPA), University of Parakou, P.O Box 123 Parakou, Benin.
Department of Sciences and Techniques of Animal Production and Fisheries, University of Parakou, Faculty of Agronomy, P.O. Box 123, Parakou, Benin.
Heliyon. 2022 Feb 16;8(2):e08971. doi: 10.1016/j.heliyon.2022.e08971. eCollection 2022 Feb.
Reproductive parameters of dairy animals are generally affected by meteorological factors. This study aimed to investigate the effects of heat stress (HS) on reproductive parameters Saanen and Saanen× Red Maradi (½S½RM) dairy goats reared on a private farm in a tropical sub-humid environment in Benin. To assess the reproductive performances 103 goats (46 Saanen and 57 ½S½RM) were followed up from January 2015 to December 2019. The temperature-humidity index (THI) was obtained during the same period using meteorological data such as ambient temperature (AT) and relative humidity (RH). Pearson correlation matrix analysis was then performed between the environmental variables and the reproductive parameters. Reproductive parameters of ½S½RM goats were better than those of Saanen goats. The conception (92.09%), prolificacy (156.54%) and fecundity (117.11%) rates of ½S½RM goats were significantly higher than those of Saanen goats (67.16%; 149.41% and 89.70%). The conception rate of Saanen goats was not affected by the level of THI. The conception, prolificacy, and fertility rates of ½S½RM goats decreased from 97.22%, 161.35% and 121.52%, at moderate THI to 83.89%, 148.86%, and 110.04% at extreme THI, respectively. In summary, although Saanen goats were very efficient in milk production, their reproductive performance was affected by the level of THI. On the contrary, the ½S½RM crossbred goats had a better conception, prolificacy and fertility rates in the sub-humid tropical climate of Benin.
奶牛的繁殖参数通常受气象因素影响。本研究旨在调查热应激（HS）对在贝宁热带半湿润环境中的私人农场饲养的萨能山羊和萨能×红马拉迪（½S½RM）奶山羊繁殖参数的影响。为评估繁殖性能，于2015年1月至2019年12月对103只山羊（46只萨能山羊和57只½S½RM山羊）进行了跟踪。同期利用环境温度（AT）和相对湿度（RH）等气象数据获得温度湿度指数（THI）。然后对环境变量与繁殖参数进行Pearson相关矩阵分析。½S½RM山羊的繁殖参数优于萨能山羊。½S½RM山羊的受孕率（92.09%）、产仔率（156.54%）和繁殖力（117.11%）显著高于萨能山羊（67.16%；149.41%和89.70%）。萨能山羊的受孕率不受THI水平的影响。½S½RM山羊的受孕率、产仔率和繁殖率分别从中等THI时的97.22%、161.35%和121.52%降至极端THI时的83.89%、148.86%和110.04%。总之，尽管萨能山羊产奶效率很高，但其繁殖性能受THI水平影响。相反，在贝宁的半湿润热带气候中，½S½RM杂交山羊具有更好的受孕率、产仔率和繁殖率。
