A comparative study on some semen characteristics and testosterone level of black goat and meriz bucks

الملخص EN

Over the period from 1st October 2009 to 1st March 2010, 29 and 57 ejaculates were obtained by electro ejaculator from five of each of black goat and Meriz bucks, 2-3 years of age, respectively raised at Animal farm, College of Agriculture, University of Suliamany.

Scrotal circumference was measured at weekly interval and blood samples were withdrawn at biweekly interval for testosterone determination.

Results revealed that Black bucks yielded significantly higher volume (0.97 vs.

0.70 ml), concentration (113.50 vs.

81.72 x 107/ml), total number of sperms per ejaculate (116.29 vs.

58.31 x 107), mass motility (83.07 vs.

71.18 %) individual motility (89.47 vs.

80.17 %), live sperm (78.93 vs.

57.41 %) and lower abnormal sperms (7.00 vs.

22.31 %) than Meriz bucks.

Although a non significant effect of month of collection was noticed in all seminal traits except percent live sperm, however, semen quantity and testosterone level was at its highest during November.