Bilateral testicular hypoplasia among mature Sahel bucks in Nigeria

Among 1608 Sahel goat bucks presented for slaughter at the Maiduguri Metropolitan abattoir in March-April 2007, 65.7% had plain white or black-white coat colour, and 91.2% were aged >1.5-3.0 years with mean body weights of 15.6-25.7 kg. Twenty-two (1.4%) of the mature bucks, aged 1.9 ± 0.3 years and weighing 20.6 ± 3.5 kg, had bilateral small hypoplastic testes that were symmetric, approximately 7 times smaller in weight, with a 2-fold reduction in longitudinal length and mid-circumference than the full-sized normal testes. The epididymes were also reduced in size as the testes. Histologically, the seminiferous tubules and caudal epididymides showed no evidence of spermatogenesis and the basement membranes of the seminiferous tubules were smooth. This is first report of bilateral testicular hypoplasia among Sahel goats in Nigeria.

Bilateral testicular hypoplasia among mature Sahel bucks in Nigeria

Among 1608 Sahel goat bucks presented for slaughter at the Maiduguri Metropolitan abattoir in March-April 2007, 65.7% had plain white or black-white coat colour, and 91.2% were aged >1.5-3.0 years with mean body weights of 15.6-25.7 kg. Twenty-two (1.4%) of the mature bucks, aged 1.9 ± 0.3 years and weighing 20.6 ± 3.5 kg, had bilateral small hypoplastic testes that were symmetric, approximately 7 times smaller in weight, with a 2-fold reduction in longitudinal length and mid-circumference than the full-sized normal testes. The epididymes were also reduced in size as the testes. Histologically, the seminiferous tubules and caudal epididymides showed no evidence of spermatogenesis and the basement membranes of the seminiferous tubules were smooth. This is first report of bilateral testicular hypoplasia among Sahel goats in Nigeria.

___

  • Devendra, C., Mcleroy G.B.: Goat and Sheep Production in the Tropics. Intermediate Agric Series Longmans, London. 1982; 1-27. 2. Bourn, D., Wint, W., Blench, R., Woolley, E.: Nigerian livestock resources survey. Wld. Anim. Rev., 1994; 78: 49-58.
  • Gall C.: Goat Breeds of the World. Margraf Verlag, Germany. 1996; 47-69.
  • Kwari, H.D., Sivachelvan, M.N., Chibuzo, G.A.: Characterization of Sahel goat in Borno state, Nigeria, for certain qualitative traits. Nig. J. Exptl. Appl. Biol., 2004; 5: 151- 154.
  • Alade, N.K., Adamu, S.B., Muhammed, I.D.: Breed and environmental eff ects on maturity of goats in semi-arid region of Nigeria. Proceedings of the 11th Annual Conference of Animal Science Association of Nigeria, September 18-21, 2006, IAR&T, Ibadan, Nigeria. 2006.
  • Raji, A.O., Igwebiuke, J.U., Aliyu, J.: Testicular biometry and relationship with body weight of indigenous goats in a semi arid region of Nigeria. ARPN J. Agric. Biol. Sci., 2008; 3: 6-9.
  • Alamquist, J.O., Amann, R.P.: Reproductive capacity of dairy bulls II. Gonadal and extragonadal sperm reserves as determined by direct counts and depletion trials, dimensions and weight of genitalia. J. Dairy Sci., 1961; 44: 1668-1678.
  • Lino, B.F.: Th e output of spermatozoa in rams. II. Relationship to scrotal circumference, testis weight, and the number of spermatozoa in diff erent parts of the urogenital tract. Aust. J. Biol. Sci., 1972; 25: 359.
  • Coulter, G.H., Foote, R.H.: Relationship of body weight to testicular size and consistency in growing Holstein bulls. J. Anim. Sci., 1976; 44: 1076-1079.
  • Berndston, W.E., Th ompson, T.L.: Changing relationships between testis size, Sertoli cell number and spermatogenesis in Sprague-Dawley rats. J. Androl., 1990; 11: 429-435.
  • Blottner, S., Roelants, H., Wagener, A., Wenzel U.D.: Testicular mitosis, meiosis and apotosis in mink (mustela vision) during breeding and non breeding seasons. Anim. Reprod. Sci., 1999; 57: 237-249.
  • Acland, H.M.: Male reproductive system. In: Carlton, W.W. and McGavin, M.D. ed. Th ompson’s Special Veterinary Pathology, 2nd edn. Mosby, Missouri, 1995; 544-560.
  • Chibuzo, G.A., Sivachelvan, M.N.: Ruminant Dissection Guide: A Regional Approach in the Goat, Faculty of Veterinary Medicine Occasional Publication No. 1, University of Maiduguri, Maiduguri, Nigeria 1994; 49-50.
  • Drury, R.A.B., Wallington E.A.: Carleton’s Histological Techniques, 4th Edn. Oxford University Press, London. 1976; 21-71.
  • Mohammed, I.D., Amin, J.D.: 1996. Estimating body weight from morphometric measurements of Sahel (Borno White) goats. Small Rumin. Res., 1996; 24: 1-5.
  • Dumas R.: Contribution a l’etude des petits ruminants du Tschad. Rev. Elev. Med. Vet. Pays Trop., 1980; 33: 215-233.
  • Ngere, L.O., Adu, I.F., Okubanjo, I.O.: Th e indigenous goats of Nigeria. In: Animal Genetic Resources Information No. 3, 1-9, UNEP/FAO, Rome. 1984.
  • Rollinson, D.H.L.: A case of testicular hypoplasia in the goat. Vet. Rec., 1950; 62: 303-304.
  • Soller, M., Laor, M., Barnea, R., Weiss, Y., Ayalon, N.: Polledness and infertility in male Saanen goats. J. Hered., 1963; 54: 237- 240.
  • Soller, M., Pageh, B., Wysoki, M., Ayalon, N.: Cytogenetics of Saanen goats showing abnormal development of the reproductive tract associated with the dominant gene of polledness. Cytogenetics, 1969; 8: 51-67.
  • Mathew, J., Raha, C.K.S.V.: 1978. Studies on testicular hypoplasia in goats. Kerala J. Vet. Sci., 1978; 9: 24-30.
  • Sponengerg, D.P., Smith, M.C., Johnson, R.J.: Unilateral testicular hypoplasia in a goat. Vet. Pathol., 1983; 20: 503-506.
  • Takebbayashi, S.S.G., Jorge, W.: Testicular hypoplasia in a horned goat with 61, XXY/60, XY karyotype. Jpn J. Genet., 1986; 61: 177-181.
  • Foster, R.A.: Male reproductive system. In: McGavin M.D. and Zachary J.F. ed. Pathologic Basis of Veterinary Disease. 4th edn. Mosby Elsevier, Missouri. 2007; 1317-1348.
  • Maina V.A., Chaudhari, S.U.R., William, A.: Semen characteristics of the Brown Ecotype of Sahel goats in the semi- arid zone of Nigeria. J. Appl. Sci., 2006; 6: 2329-2331.
Turkish Journal of Veterinary and Animal Sciences-Cover
  • ISSN: 1300-0128
  • Yayın Aralığı: Yılda 6 Sayı
  • Yayıncı: TÜBİTAK
Sayıdaki Diğer Makaleler

Eosinophils in lung tissue in 2 Chilean Criollo horses with exacerbated recurrent airway obstructions “heaves”

Alexander ORTLOFF, Hugo FOLCH, Gabriel MORÁN

Aflatoxin M1 contamination in cow’s milk in Kayseri (central Turkey)

Hikmet Mavuş BULDU, A.Nedret KOÇ, Güven URAZ

Analysis of the ORF region of the prion protein gene in the Botosani Karakul sheep breed from Romania

Steliana Elvira Maria KEVORKIAN*, Mihaela ZAULET, Maria Adina MANEA

Effects of varying levels of prrotected fat on perfomance of Shami goats during early and mid lactation

Hosam TITI

Eosinophils in lung tissue in 2 Chilean Criollo horses with exacerbated recurrent airway obstructions “heaves”

Alexander ORTLOFF, Hugo FOLCH, Gabriel MORÁN

Statistical evaluation of some environmental factors aff ecting the gross effi ciency of crude protein in high producing dairy cows

Pouya ZAMANI, Ahmad AHMADI, Seyed Reza MIRAEI-ASHTIANI, Hasan ALIARABI, Ali Asghar SAKI, Khalil ZABOLI, Daryoush ALIPOUR

Aflatoxin M1 contamination in cow’s milk in Kayseri (central Turkey)

Hikmet Mavuş BULDU, A.Nedret KOÇ, Güven URAZ

Duration of immunity following the administration of oil-based avian influenza H5N1 vaccine in layers

Maryam NISAR, Asif RASHID*, Muhammad IQBAL

Disodium EDTA used as anticoagulant causes hemolysis in common carp blood

Malgorzata WITESKA*, Wioleta WARGOCKA

Effect of ejaculation frequency on spermatozoa survival in diluted semen from Pleven Blackhead rams

Stanimir YOTOV*, İvan FASULKOV, Nasko VASSILEV