Journal of
Veterinary Medicine and Animal Health

  • Abbreviation: J. Vet. Med. Anim. Health
  • Language: English
  • ISSN: 2141-2529
  • DOI: 10.5897/JVMAH
  • Start Year: 2009
  • Published Articles: 351

Full Length Research Paper

Development of hormonal profiles of Nubian bucks at puberty in Sudan

Shaaeldin Sara Abdelrahman
  • Shaaeldin Sara Abdelrahman
  • Department of Anatomy, Department of Reproduction and Obstetrics, Faculty of Veterinary Medicine, University of Khartoum, Shambat, Sudan.
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Makawi Sharaf Aldin Abdalla
  • Makawi Sharaf Aldin Abdalla
  • Anatomy Unit, School of Medicine, Ahfad University for Women, P. O. Box 167 Omdurman Sudan.
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Tingari Muddathir Darderi
  • Tingari Muddathir Darderi
  • Department of Anatomy, Faculty of Veterinary Medicine, University of Khartoum, Shambat, Sudan.
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Eltayeb Ahmed Eltyeb Ali
  • Eltayeb Ahmed Eltyeb Ali
  • College of Science-Dawadmy, University of Shaqra, P. O. Box 1040 Dawadmy, Saudi Arabia.
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  •  Received: 21 September 2018
  •  Accepted: 11 June 2019
  •  Published: 31 October 2019

Abstract

This study was designed to monitor the development of the hormonal profiles of the Nubian bucks at puberty. Thirty two (32) Nubain male kids between 1 day and 24 weeks having body weights of 2.3 to 13.5 kg were utilized in this study. All kids were injected with human chorionic gonadotropin (hCG). Blood samples were collected from the jugular veins of the animals immediately before hCG injection and 1 h after the injection. Plasma was separated from the samples and stored at 20°C until it was assayed for determination of hormonal levels. After hCG injection, the plasma level of testosterone was significantly higher (p< 0.01) than the level of the hormone before hCG treatment. Significant increase was also observed in luteinizing hormone (LH) values after hCG injection (P≤ 0.01). Plasma follicles stimulating  hormone (FSH) had one peak in week 8 in samples taken before hCG injection. This was followed after two weeks by the first elevation of LH. Plasma prolactin (PRL) concentration showed a gradual increase with age, reaching the peak in week 18. Based on the first appearance of spermatozoa in the lumina of the seminiferous tubules, penile separation and attainment of maximal levels of testosterone, LH, FSH and PRL, pubertal age was reached between 18 to 20 weeks. 

Key words: Nubian bucks, hormonal profiles, puberty.