Preliminary report on the age-related variations in the serum and seminal plasma testosterone, seminal plasma biochemistry and seminal vesicle histochemistry of male broodstock African catfish (Clarias gariepinus)

This study investigated the age-related changes in the concentrations of serum testosterone and seminal plasma testosterone, ions, total protein, glucose concentrations and alkaline phosphatase (AP), amino aspartate transferase (AST) activities and the periodic acid Schiff-Alcian blue histochemistry of the seminal vesicle of cultured male broodstock African catfish of 6, 9 and 12 months of age. Each of these months constituted an age group and had five fish. The mean seminal plasma testosterone concentrations of the 6 months-age group were significantly higher ( P