GONADAL AND EXTRA-GONADAL SPERM RESERVES OF KANO BROWN BUCKS AS AFFECTED BY SEASON AND FEEDING REGIME
Abstract
This study investigated the influence of season and feeding regimes on the reproductive parameters of Kano Brown bucks. Forty-eight (48) bucks were utilized, with sixteen (16) bucks allocated to each of the three distinct seasons. The Kano Brown Bucks, a breed integral to Nigeria's meat production industry, hold significant agricultural value, necessitating a deeper understanding of their reproductive physiology to optimize breeding strategies. Central to this is the concept of gonadal reserves, which pertain to sperm stored within the testes and serve as a critical indicator of fertility potential. These reserves, influenced by environmental and nutritional conditions, directly affect the breed's reproductive capacity. Similarly, extra-gonadal reserves sperm stored in the epididymis and associated structures play a pivotal role in successful mating, underscoring the need to evaluate both reserves holistically. Seasonal variations, such as fluctuations between wet and dry seasons, introduce stressors that may disrupt hormonal balance and sperm production, while feeding regimes further modulate reproductive health, as balanced nutrition is essential for maintaining sperm quality and quantity. At the conclusion of the experimental period, twelve (12) bucks (three per treatment group) were orchidectomised. A total of twenty-four (24) testes (right and left) were harvested, and their weights (g) and lengths (cm) were recorded. Subsequently, the epididymis was meticulously dissected from each testis using a scalpel blade and further divided into its three anatomical regions: caput, corpus, and cauda epididymides. The weight (g) and length (cm) of each epididymal segment were also measured. Both testicular and epididymal tissues were processed in...
References
Adu, I. F., Buvanendran, V and Lakpini. C. A. M. (1979). The Reproductive Performance of Red Sokoto goats in Nigeria. Journal of Agricultural Science, Cambridge; 93: 563-566. DOI: https://doi.org/10.1017/S002185960003896X
Amann, R. P. (1970). Sperm production rate in the testis. A. D. Johnson, W. R. Gomes and N. L. Van Demark (Ed) New York, academic press Vol 1: Pp 112-115.
Bianca, W. (1955). The effect of repeated short exposures to heat on volume and hydration of the blood of the calf. British Veterinary Journal, 113, PP 227-241. DOI: https://doi.org/10.1016/S0007-1935(17)46002-7
Coulson, P. B., Snell, R. L. and Praise, C. (1980). Short term metabolic effects of the antifertility agent, gossypol, on various reproductive organs of male mice. International Journal of Andrology, 3: 507-518. DOI: https://doi.org/10.1111/j.1365-2605.1980.tb00139.x
FAO. (2012). Food and Agriculture Organization. FAO Statistic retrieved from http://fao.org/site/569 on 13/04/2014.
Gyang, E. O. (1990). Castration in large Animals In: Introduction to Large Animal Surgery Agitab Publishers Ltd. Nigeria pp. 279-292.
Hassan A. M. (2010). Effect of groundnut haulms supplementation on growth and reproductive performance of Kano Brown bucks (Msc) thesis, ABU-Zaria. Unpublished.
Igboeli, G. and Rakha, A. M. (2007). Seasonal changes in ejaculate characteristics of Angoni (short-horn) Zebu bulls. Journal of Animal Science, 33: 651-654. DOI: https://doi.org/10.2527/jas1971.333651x
KNARDA. (2001). Kano State Agricultural and Rural Department Authority. Metrological station report book. Page 11 - 13
Lombin, L. (2007). African Agriculture; Nigerian Livestock Population. Retrieved from http://www.africanagricultureblog.com/2007/12/Nigeria-has-16-million-cattle.html .on 12/3/2015.
Malami, B. S. P. 1. Y. Hicrnaux. H. M. Tukur, and J. Steinbach (2006). Effect of supplementation on feed intake and live weight of Sheep grazing natural range and crop fields of Zamfara reserve in semi-arid Nigeria. Tropical Journal of Animal Science, 9 (2): 107-117.
Marai, I. F. M., Baghat, L. B., Shalaby, T. H. and Abdel-Hafez, M. A. (2007). Fattening performance, some behavioural traits and physiological reactions of male lambs fed concentrates mixture alone with or without natural clay, under hot summer of Egypt, Annals Arid Zone, 39: 449-460.
Nasir, M., Njadda, A. A., and Hassan, A. M. (2014). Testicular histometry, gonadal and extra gonadal sperm reserve of Red Sokoto bucks fed cotton seed cake. Journal of Science, 4: 227-232.
Ngere, L. O., Adu I. F., and Okobayo, I. O. (1984). The indigenous goat of Nigeria. In FAO/UNEP Animals Genetic Information Technology 1 - 9. FAO; Rome, Italy. DOI: https://doi.org/10.1017/S1014233900000109
Olofin, E. A. (2007). Some aspects of physical geography of Kano region and related human resources. Departmental Lecture note series Vol. 1 Pp 50, Geography Department, Bayero University, Kano.
Osinowo, O. A., Bale, J. O. and Eduvie, L. O. (1982). Semen quality of Yankasa rams. Tropical Animal Health and Production, 14, 189. DOI: https://doi.org/10.1007/BF02242155
Osuga, I. M., Abdulrazak, S. A., Nishino, N., Ichinohe, T. and Fujihara, T. (2006). Potential nutritive value of selected browse species from Kenya using in vitro gas production techniques and polyethylene glycol. Livestock Research and Rural Development. 18 Article # 171. http://www.irrd.org/irrd18/18/12/osug18171.htm.
Rekwot, P. I., Oyedipe, E. O., Akereiola, O. O., Kumi-Diaka, J. and Umoh, J. E. (1987). The effect of intake on pubertal Bunaji and crossbred bull, Theriogenology, 28. 427-434.
Rekwot, P. I., Oyedipe, E. O., Akerejola, O. O., Kumi-Diaka, J. and umoh, J. E. (1984). The effect of protein intake on the onset of puberty in Bunaji and Friesian x Bunaji crossbred bulls in Nigeria. Theriogenology, (4): 427-434. DOI: https://doi.org/10.1016/0093-691X(87)90247-0
SAS Institute Inc. (2002). Statistical Analysis System SAS/STAT. Guided for Personal Computers. Version 9.1 Edition, Cary N.C. USA 967 978 Pp.
Sakesena, S. K. and Salmonsen, R. A. (1982): Antifertility effects of gossypol in male hamsters. Fertility and Sterility, 37: 689-690. DOI: https://doi.org/10.1016/S0015-0282(16)46283-7
Taha, T. A., Shaaban W. F., El-Mahdy, A. R., El-Nouty F. D., Salem, M. H. (2006). Reproductive toxiological effects of gossypol on male rabbits: Semen characteristics and hormonal levels. Journal of Animal Science, 82: 259-269 DOI: https://doi.org/10.1079/ASC200632
Tibbo, M. (2006). Reproductivity and health of indigenous sheep breeds and crossbreds in the central Ethipian highland. Ph.D. Dissertation, Swedish University of Agricultural Science, Uppsala, Sweden. Un-published
Valasquez-Pereira, J., P. J. Chenoweth, L. R. McDowell, C. A. Risco, C. A. Staples, D. Prichard, F, G. Martin, M. C. Calhoun, S. N. Williams and Wilkinson, N. S. (1998). Reproductive effects of feeding gossypol and Vitamin E to Bulls. Journal of Animal Science, 76: 2894-2904. DOI: https://doi.org/10.2527/1998.76112894x
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