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ABSTRACT: This study was aimed to find out the effects of non-genetic factors on semen quality of Black Bengal buck. Accumulated one year’s data on 9 bucks in the nucleus breeding flock of Black Bengal goats were analyzed for the study of production traits. The traits considered were body weight, weight at every week interval and semen characteristics such as volume, sperm concentration, mass motility, sperm livability and normal sperm. Semen parameters were evaluated from bucks collected twice a week by artificial vagina method. The significance of effects on body weight and scrotal circumference were analyzed. The average volume of semen (ml/ejaculate), sperm concentration (109 /ml), mass motility (%), live spermatozoa (%) and normal spermatozoa (%) at 10-15 kg body weight were 0.38, 2.3, 78.2, 85.2 and 85.68 respectively. The average volume of semen (ml/ejaculate), sperm concentration (109 /ml), mass motility (%), live spermatozoa (%) and normal spermatozoa (%) at 15 to above body weight were 0.42, 2.5, 75.4, 84.8 and 85.32 respectively. Body weight of Black Bengal goat had a significant (p<0.05) effect on semen volume and scrotal circumference significantly influenced (p<0.05) all the semen characteristics. Semen volume and sperm concentration increased with scrotal circumference. It is suggested that non-genetic factors should be adopted as a technique for improving the productive traits.
Keywords: Goat, non-genetic, body weight, scrotal circumference, semen
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