Libido and Physico-Morphological Characteristics of Semen in Pantja Bucks

A study was conducted on Pantja bucks to evaluate libido and physico-morphological characteristics of semen. The libido expressed by reaction time (sec) in bucks of Gr 1 (6–12 months), Gr 2 (12–24 months) and Gr 3 (> 24 months) were 89.28±4.41, 38.59±1.00, 39.28±7.72 sec and no. of mounts/ejaculation as 4.43±2.12, 3.14±0.14, 2.90±0.87, respectively. The average semen volume in Pantja bucks ranged from 0.35–0.53 ml. The average mass activity, progressive motility, live and dead sperm percentage were not influenced by age of buck. The sperm concentration ranged significantly (P<0.05) from 2.62±0.04 x10⁹/ml (Gr 1) to 2.93±0.18 x10⁹/ml (Gr 3). The average abnormal spermatozoa ranged significantly (P<0.05) from 7.37±0.76% in 6–12 months bucks to 4.77±0.19% in >24 months old bucks. Similar pattern was observed for primary and secondary abnormalities. Of the characters studied, libido, semen volume, sperm concentration and % abnormal spermatozoa were significantly influenced by age of the bucks. It can be concluded that the values of seminal biology of local Pantja bucks were within the normal range of wellestablished breeds.