Present study was conducted to study the effect of age on semen parameters in Surti buck. Age was significantly influenced on majority of the semen parameters in Surti bucks. Adult bucks significantly (P<0.01) performed better in terms of semen quantitative parameters viz., semen density (3.91+0.03 vs 3.79+0.03), volume (1.01+0.03 vs 0.86+0.03 mL), sperm concentration (2564.22+87.27 vs 1978.13+60.79 million/mL), total sperm count (2483.83+115.22 vs 1546.93+62.96 million) and semen index (1737.19+78.10 vs 1104.39+47.29 million). However, semen qualitative parameters viz., initial progressive motility (93.75+0.22 vs 93.72+0.21%), live sperm count (75.36+0.93 vs 75.93+0.74%), sperms with physically intact plasma membrane (85.28+0.27 vs 85.31+0.19%), progressive motility at various intervals and morphologically normal spermatozoa were at par in adult as well as in young Surti bucks.
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