References

Agarwal, V.K., S.P. Agarwal, N.K. Dixit, N. Singh and P.K. Dwaraknath, 1983. A twenty-four hour temporal variation in peripheral levels of testosterone and thyroid hormones in male buffaloes. Theriogenology, 20: 37-45.
CrossRef  |  Direct Link  |  

Almquist, J.O. and R.P. Amann, 1961. Reproductive capacity of dairy bulls. II. Gonadal and extra-gonadal sperm reserves as determined by direct counts and depletion trials: Dimensions and weight of genitalia. J. Dairy Sci., 44: 1668-1678.
Direct Link  |  

Amann, R.P., 1970. Sperm Production Rates. In: The Testis, Johnson, A.D., W.R. Gomes and N.L. Van Demark (Eds.). Academic Press, New York.

Coulter, G.H. and R.H. Foote, 1979. Bovine testicular Measurements as indicators of reproductive performance and their relationship to productive traits in cattle: A review. Theriogenology, 11: 297-311.
PubMed  |  Direct Link  |  

Deviche, P., 1983. Interaction between Adrenal Function and Reproduction in Male Birds. In: Avian Endocrinology: Environmental and Ecological Perspectives. Mikami, S., M. Wada and K. Homma (Eds.). Springer-Verlag, Berlin, pp: 243-254.

Edqvist, L.E., A. Haggstrom, H. Kindahl and G.H. Stabenfeldt, 1976. Radioisotopic techniques for the study of reproductive physiology in domestic animals 1. Assay Procedures, Nuclear Techniques in Animal Reproduction and Health. Proc. Symp. Vienna, pp: 513.

Entwistle, K.W., 1983. Factors influencing reproduction in beef cattle in Australia. Australia Meat Res. Council Rev., 43: 1-30.

Etches, R.J., 1993. Reproduction in Poultry. In: Reproduction in Domesticated Animals, King, G.J. (Ed.). Elsevier, Huddersfield, UK.

Etches, R.J., 1996. Reproduction in Poultry. CAB International, Wallingford, Oxon, UK., pp: 318.

Fields, M.J. J.F. Hentges, W. Kenneth and K.W. Cornelisse, 1982. Aspects of the sexual development of Brahman versus Angus bulls in Florida. Theriogenology, 18: 17-31.

Fields, M.J., W.C. Burns and A.C. Warnick, 1979. Age season and breed effects on testicular volume and semen traits in young bulls. J. Anim. Sci., 48: 1299-1304.
Direct Link  |  

Hafez, E.S.E., 1987. Reproductive Cycles in Poultry, the Male: Reproduction in Farm Animals. 5th Edn., Lea and Febiger, Philadelphia, USA., pp: 388-392.

Hafez, E.S.E., 1990. Artificial Insemination. In: Reproduction in Farm Animals, 5th Edn., Hafez, E.S.E. (Ed.). Lea and Fabiger, Philadelphia, pp: 481-497.

Heiblum, R., E. Arnon, G. Gvaryahu, B. Robinzon and N. Snapir, 2000. Short-term stress increases testosterone secretion from testes in male domestic fowl. Gen. Comp. Endocrinol., 120: 55-66.
CrossRef  |  

Johnson, T.S. and M. Zuk, 1995. Testosterone and aggression in male red jungle fowl. Hormone Behav., 29: 593-598.
Direct Link  |  

Karg, H., T. Gimenez, L.M. Hurt, B. Hoftmann, E. Schallenberger and D. Schams, 1976. Testosterone Luteinizing Hormone (LH) and follicle stimulation hormone (FSH) in peripheral plasma of bulls: Levels from birth through puberty and short-term variations. Zentbl. Vet. Med., 23: 793-803.

Osinowo, E.O., E.C. Molokwu and D.C. Osori, 1981. Growth and testicular development in Bunaji bulls. J. Anim. Res., 16: 55-67.

Peters, A.R. and P.J.H. Ball, 1995. Pharmacological Control of the Estrous Cycle. In: Reproduction in Cattle, 2nd Edn., Peters, A.R. and J.P.H. Ball, (Eds.). Blackwell Science, New York, pp: 89-105.

Reeves, K.R. and B.H. Johnson, 1976. Energy intake and testis function in pre-pubertal bulls. J. Anim. Sci., 42: 264-264.

Rekwot, P.I., 2000. The influence of bull biostimulation and season on puberty and postpartum ovarian function in cattle. Ph.D. Thesis, Postgraduate School, Ahmadu Bello University, Zaria, pp: 195.

Rekwot, P.I., E.O. Oyedipe, O.O. Akerejola and J. Kumi-Diaka, 1988. The effect of protein intake on body weight scrotal circumference and semen production of Bunaji bulls and their Friesian crosses in Nigeria. Anim. Reprod. Sci., 16: 1-9.
CrossRef  |  

Rekwot, P.I., O.S. Lamidi, A.M. Adamu, C.U. Egbuedo, J.S. Rwuaan and S.N. Okereke, 1997. Reproductive performance of Bunaji bulls grazing natural pasture and receiving supplements containing palm kernel meal. Nig. Vet. J., 18: 26-36.

Roberts, S.J., 1971. Veterinary Obstetrics and Genital Diseases. 2nd Edn., CBS Publication and Distributors, New Delhi, India, pp: 496-506.

Sanwal, P.C., A. Sundby and L.E. Edqvist, 1974. Diurnal variations of LH, FSH, prolactin and testosterone in peripherial plasma of prepubertal bulls. J. Reprod. Fertility, 54: 145-148.

Sharp, S.P., J. Culbert and J.W. Wells, 1977. Variations in stored plasma concentrations of androgens and luteinizing hormone during sexual development in the cockerel. J. Endocrinol., 74: 467-476.
CrossRef  |  Direct Link  |  

Tegegne, A., K.W. Entwistle and W. Mukasa-Mugerwa, 1992. Gonadal and extra gonadal sperm reserves and testicular biometric characteristics in Zebu and crossbred bulls: Effect of dry season nutritional supplementation. Anim. Reprod. Sci., 29: 25-33.

Tegegne, A., Y. Dembarga, T. Kassa and R. Franceschni, 1994. Effect of plane of nutrition and eason on body and testicular growth on semen characteristics in Boran and Boranxfriesian bulls in Ethiopia. Anim. Reprod. Sci., 36: 197-209.
CrossRef  |  

Thibier, M., 1976. Diurnal testosterone and 17α-hydroxyprogesterone in peripheral plasma of young post-pubertal bulls. Acta Endocrinol., 81: 623-634.
Direct Link  |  

Van Demark, N.L. and R.E. Mauger, 1964. Effect of energy intake on reproductive performance of dairy bulls. 1. Growth of reproductive organs and puberty. J. Dairy Sci., 47: 798-802.
CrossRef  |  

Weisgold, A.D. and J.O. Almquist, 1979. Reproductive capacity of beef bulls. VI. Daily spermatozoa production, spermatozoa reserves and dimensions and weight of reproductive organs. J. Anim. Sci., 48: 351-358.
Direct Link  |  

Wildeus, S. and K.W. Entwistle, 1982. Post pubertal changes in gonadal and extra gonadal sperm reserves in Bos indicus strain of bulls. Theriogenology, 17: 655-668.
CrossRef  |  

Wilson, E.K., J.C. Rogler and R.E. Erb, 1979. Effect of sexual experience location, malnutrition and repeated sampling on concentrations of testosterone in blood plasma of Gallus domesticus roosters. Poultry Sci., 58: 718-786.
PubMed  |  Direct Link  |