Testosterone concentration in blood serum of buffalo bulls during 24 hours in winter and summer seasons
Keywords:Testosterone, Serum, Buffaloes
AbstractTestosterone concentration was measured by radioimmunoassay in 30 samples of blood serum obtained five times at each 6 hour’s interval during 24 hours from 6 Jaffarabadi x Mediterranean buffalo bulls. Blood samplings were carried out twice, respectively, in one day of summer and one day of winter season. Testosterone concentration ranged from 0.10 to 1.36 ng/ml in the winter day and from 0.10 to 2.54 ng/ml in the summer day. Maximum values were obtained at 6:00 p.m. (0.52) in summer and 0.82 ng/ml in winter, then abrupt drops occurred, first at 12 m. (0.37) in summer and 0.21 in winter, and the second one at 24 p.m. (0.17) in summer and 0.49 ng/ml in winter. In summer, higher serum testosterone levels were observed during the day.
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Barnabé, V. H., Barnabé, R. C., Oliveira, C. A. de, Gambarini, M. L., Guido, M. C., & Valentim, R. (1995). Testosterone concentration in blood serum of buffalo bulls during 24 hours in winter and summer seasons. Brazilian Journal of Veterinary Research and Animal Science, 32(3), 191-193. https://doi.org/10.11606/issn.1678-4456.bjvras.1994.52110
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