National Academy of Agricultural Sciences (NAAS)
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PRINT ISSN : 2319-7692
Online ISSN : 2319-7706 Issues : 12 per year Publisher : Excellent Publishers Email : editorijcmas@gmail.com / submit@ijcmas.com Editor-in-chief: Dr.M.Prakash Index Copernicus ICV 2018: 95.39 NAAS RATING 2020: 5.38 |
The objective of the present study was to investigate the seasonal effect on neat semen quality of Gir bulls. In the winter, a total of 27 ejaculates were collected and in the summer, 59 were collected from three healthy bulls. Ejaculates were collected on a weekly basis using the artificial vagina method (42–45°C). Meteorological data were recorded daily during the experimental period. Semen samples were evaluated for ejaculated volume, initial motility, mass motility, sperm livability, hypo-osmotic swelling test (HOST), acrosomal integrity and sperm abnormalities. During winter season, initial motility, mass motility, sperm viability, HOST and sperm acrosomal integrity was significantly (p<0.05) lower compared to the summer season, while, ejaculate volume and sperm concentration was higher during summer. The season had no significant effect on sperm abnormalities. Mass motility was positively correlated with the initial motility (r=0.309), sperm viability (r=0.600), HOST (r=0.512), acrosomal integrity (r=0.558), sperm abnormalities (r=0.027). Whereas, initial motility was positively correlated with the mass motility (r=0.309), sperm viability (r=0.127), HOST (r=0.149), acrosomal integrity (r=0.210) and negatively correlated with sperm concentration (r= -0.123) and sperm abnormalities (r= -0.450).
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