Season Induced Changes in Seminal Characteristics of Sahiwal Breeding Bulls

作者：Muhammad Fahad Bhutta, M. M. Tariq, Muhammad Tarique Tunio, Abubakar Sufyan, Hafiz Abdul Rauf, Moazzam Javed, Safdar Imran · 发表于：Advances in Animal and Veterinary Sciences · 年份：2020 · DOI：10.17582/journal.aavs/2020/8.6.601.607 · 被引用次数：4 · 研究领域：Reproductive biology and impacts on aquatic species、Animal Genetics and Reproduction、Genetic and phenotypic traits in livestock

T he Sahiwal breed of cattle is native breed of Pakistan.Sahiwal breed is reputed to be known for its high tolerance against harsh climate, tropical disease resistance and having high production potential in least resource availability, making it one of the best cattle breeds of tropical regions (Ilatsia et al., 2011).Originating from Pakistan, the breed has now spread to almost 29 other countries including 12 African countries (McSweeney and Mackie, 2012).The breed is also a part of many breeding plans to develop new breeds where tropical climate dominates e.g.Australian Friesian Sahiwal in Australia.Therefore, there has been ever increasing demand for the semen of Sahi-wal cattle in Pakistan in general and globally in particular (Singh et al., 2015).Health and management of donor bulls is empirical for production of semen having good quality and quantity.Quality of semen is a function of various factors and season is most important among those.Season affects the reproductive performance of bulls through its major meteorological components like temperature, humidity, daylength and rainfall (Bhakat et al., 2009).A recent study conducted on Friesian bulls in Libya (Alragubi, 2015) indicated that higher atmospheric temperature in summer season adversely affect different biological and physical characteristics of semen.