Indian Journal of Animal Research

  • Chief EditorK.M.L. Pathak

  • Print ISSN 0367-6722

  • Online ISSN 0976-0555

  • NAAS Rating 6.50

  • SJR 0.263

  • Impact Factor 0.4 (2024)

Frequency :
Monthly (January, February, March, April, May, June, July, August, September, October, November and December)
Indexing Services :
Science Citation Index Expanded, BIOSIS Preview, ISI Citation Index, Biological Abstracts, Scopus, AGRICOLA, Google Scholar, CrossRef, CAB Abstracting Journals, Chemical Abstracts, Indian Science Abstracts, EBSCO Indexing Services, Index Copernicus
Submit

Research Article

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.

ABSTRACT

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.

REFERENCES

  1. Bao Z-Q, Liao T-T, Yang W-R, Wang Y, Luo H-Y, et al., (2016). Heat stress-induced autophagy promotes lactate secretion in cultured immature boar Sertoli cells by inhibiting apoptosis and driving SLC2A3, LDHA and SLC16A1 expression. Theriogenology. 87:339-348. 
  2. Dong HJ, Wu D, Xu SY, Li Q, Fang ZF, et al., (2016). Effect of dietary supplementation with amino acids on boar sperm quality and fertility. Anim Reprod Sci. 172:182-9.
  3. Estienne MJ. (2014). A review of the effects of prostaglandins on sexual behavior in boars. Appl Anim Behav Sci. 154:1-7.
  4. Holinger M, Früh B, Hillmann E. (2015). Group composition for fattening entire male pigs under enriched housing conditions—    Influences on behaviour, injuries and boar taint compounds. Appl Anim Behav Sci. 165:47-56.
  5. Huang S.Y, Kuo Y.H, Lee Y.P, Tsou H.L, Lin E.C, et al., (2000). Association of heat shock protein 70 with semen quality in boars. Anim Reprod Sci. 63: 231-40
  6. Jensen TB, Baadsgaard NP, Houe H, Toft N, Østergaard S. (2008). The association between disease and profitability in individual finishing boars at a test station. Livest Sci. 117:101-8.
  7. Knox RV. (2016). Artificial insemination in pigs today. Theriogenology. 85:83-93.
  8. Knox R, Levis D, Safranski T, Singleton W. (2008). An update on North American boar stud practices. Theriogenology. 70:1202-8.
  9. Koketsu Y, Sasaki Y. (2009). Boar culling and mortality in commercial swine breeding herds. Theriogenology. 71:1186-91.
  10. Le HT, Nilsson K, Norberg E, Lundeheim N. (2015).Genetic association between leg conformation in young pigs and sow reproduction. Livest Sci. 178:9-17. 
  11. Levis DG, Reicks DL. (2005). Assessment of sexual behavior and effect of semen collection pen design and sexual stimulation of boars on behavior and sperm output—a review. Theriogenology. 63:630-42.
  12. Munsterhjelm C, Heinonen M, Valros A. (2015). Effects of clinical lameness and tail biting lesions on voluntary feed intake in growing pigs. Livest Sci. 181:210-9.
  13. Robinson JA, Buhr MM. (2005). Impact of genetic selection on management of boar replacement. Theriogenology. 63:668-78.
  14. Rodriguez-Gil JE, Bonet S. (2016). Current knowledge on boar sperm metabolism: Comparison with other mammalian species. Theriogenology. 85:4-11.
  15. Safranski TJ. (2008).Genetic selection of boars. Theriogenology. 70:1310-6.
  16. Sasaki Y, Koketsu Y. (2010). Culling intervals and culling risks in four stages of the reproductive life of first service and reserviced female pigs in commercial herds. Theriogenology. 73:587-94.
  17. Schulze M, Buder S, Rudiger K, Beyerbach M, Waberski D. (2014). Influences on semen traits used for selection of young AI boars. Anim Reprod Sci. 148:164-70.
  18. Smital J. (2009). Effects influencing boar semen. Anim Reprod Sci. 110:335-46.
  19. Sonderman JP, Luebbe JJ. (2008). Semen production and fertility issues related to differences in genetic lines of boars. Theriogenology. 70:1380-3.
  20. Suriyasomboon A, Lundeheim N, Kunavongkrit A, Einarsson S. (2004). Effect of temperature and humidity on sperm production in Duroc boars under different housing systems in Thailand. Livest Prod Sci. 89:19-31.
  21. Sylvie D, Allen D. (1990). Boar culling in swine breeding herds in Minnesota. Can Vet J. 31:581-3
  22. Zaja IZ, Samardzija M, Vince S, Majic-Balic I, Vilic M, Duricic D, et al. (2016). Influence of boar breeds or hybrid genetic composition on semen quality and seminal plasma biochemical variables. Anim Reprod Sci. 164:169-76.
  23. Zasiadczyk L, Fraser L, Kordan W, Wasilewska K. (2015). Individual and seasonal variations in the quality of fractionated boar ejaculates. Theriogenology. 83:1287-303.
  24. Zhao Y, Liu X, Mo D, Chen Q, Chen Y. (2015). Analysis of reasons for sow culling and seasonal effects on reproductive disorders in Southern China. Anim Reprod Sci. 159:191-7. 
Reviewed By

Download Article
In this Article
    Contact us
    Follow us

    Editorial Board

    View all (0)