Testosterone secretion in young and adult buffalo bulls

Abstract Studies were conducted to determine the 24-hour fluctuations in blood serum testosterone concentration in adult buffalo bulls, and to measure testosterone secretion before and after GnRH administration in male buffaloes of different age groups. Testosterone levels in three sexually mature bulls ranged from 0.2 to 2.7 ng/ml with a mean of 0.6 ± 0.2 ng/ml. Samples collected in November had significantly higher (P