Indian Journal of Animal Research

  • Chief EditorK.M.L. Pathak

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Indian Journal of Animal Research, volume 54 issue 3 (march 2020) : 286-292

Analysis of the Factors Affecting Boar culling in commercial Boar Studs in Southern China

Zhili Li, Yunxiang Zhao, Jiedan Liao, Shujian Huang
1College of Life Science and Engineering, Foshan University, Jiangwan street, Foshan 528 231, Guangdong province, China.
Cite article:- Li Zhili, Zhao Yunxiang, Liao Jiedan, Huang Shujian (2017). Analysis of the Factors Affecting Boar culling in commercial Boar Studs in Southern China. Indian Journal of Animal Research. 54(3): 286-292. doi: 10.18805/ijar.B-773.
The objectives of this study were to measure culling frequency and analysis of reasons for boar culling in commercial boar studs. Data were obtained from nine commercial boar studs included 2342 culled boars in Southern China during July 2013 to June 2016. Descriptive statistics of reasons for boar culling revealed that the frequency of unplanned cull boar accounted for a large proportion (88.04%), reproductive disorders (40.61%) and lameness (27.2%) were the most frequently cited reasons. Sperm-related problems accounted for the largest proportion (668, 70.24%) due to reproductive disorders, followed by the abnormal genital system (169, 17.78%). The highest frequency of reproductive disorders was arisen in May (17.98%), and the relatively high culling frequency lasted for 16 weeks until August (10.00%), especially for the Yorkshire boar that owned highest culling risk (47.09%) with the culled number reached peak in May (60, 21.82%), followed by July (33, 12.00%). In additionÿthe highest frequency of boar culling due to lameness appeared in May (90, 14.13%), followed by January (68, 10.68%) and December (66, 10.36%) with cold and wet. It was speculated that extreme weather was more likely to cause lameness. Our research suggested farmers under subtropical climate should take effective measures to reduce heat and humidity stress at the earliest, preferably from late spring to August to improve reproductive efficiency on boar studs, and also take breed differences into their decision-making processes to ensure adequate boar power and customer satisfaction.
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