Galina C S, Horn M M, Molina R
Departamento de Reproducción, Facultad de Medicina Veterinaria y Zootecnia, Universidad Nacional Autónoma de México, Mexico.
Horm Behav. 2007 Jun;52(1):26-31. doi: 10.1016/j.yhbeh.2007.03.026. Epub 2007 Apr 4.
The present review describes the behavioral characteristics of bulls raised under tropical and subtropical conditions and emphasizes the difficulties associated with adequately monitoring their performance in the field to predict reproductive potential. Most of the information generated for improving our understanding of bull behavior under range conditions has been generated in Bos taurus bulls. The limited information available in Bos indicus indicates that males searching for cows in estrus display different sexual patterns when compared to B. taurus bulls and a poor selection of a sire utilized in range conditions can have an important impact in cattle production. Screening and selecting [cg1] bulls for desirable reproductive traits and high libido is known to improve the reproductive performance of the herd. The reproductive and genetic potential of a bull is influenced by factors such as management, age, nutrition and problems related to the female such as embryonic death and anestrus. However, behavioral characteristics of bulls when detecting and serving cows in estrus is poorly understood.
本综述描述了在热带和亚热带条件下饲养的公牛的行为特征，并强调了在实地充分监测其性能以预测繁殖潜力所面临的困难。为增进我们对公牛在放牧条件下行为的理解而产生的大部分信息都是关于欧洲牛公牛的。印度瘤牛的相关信息有限，这表明与欧洲牛公牛相比，寻找发情母牛的印度瘤牛公牛表现出不同的性行为模式，并且在放牧条件下对公畜的选择不当会对养牛生产产生重大影响。筛选和选择具有理想繁殖性状和高性欲的公牛，已知可提高牛群的繁殖性能。公牛的繁殖和遗传潜力受到管理、年龄、营养以及与母牛相关的问题（如胚胎死亡和发情期）等因素的影响。然而，对于公牛在检测和配种发情母牛时的行为特征，我们了解甚少。
