Prepubertal Serum Testosterone Concentration In Vembur Rams At Different Rearing System

R. Selvakkumar, T. Sivakumar, S. Ganesh Kumar, P. Anuradha


The present investigation was carried out to study the prepubertal testosterone pattern and age
at puberty in Vembur rams reared under farm and farmers field condition. A total number of 8
Vembur ram lambs each from farm and farmers field were selected. The measurement of
testosterone was performed by Radioimmunoassay (RIA). The serum testosterone level from 6th
to 20th month of age ranged from 0.132 0.04 to 3.823 ng/ml in semi intensively maintained farm
males and 0.1380.04 to 3.4560.17 ng/ml in animals maintained at farmers holdings. The serum
testosterone levels were crossing the concentration of 2.5 ng/ml at the age of 17 to 18th weeks
and successful mounting, intromission and ejaculation were noticed after this age.


Testosterone, puberty, Vembur sheep, different management, RIA

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