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A total of 2084
semen ejaculates collected from 16 Jersey bulls (aged
between 2 to 6 years) during three seasons (winter, summer
and rainy) of the year were studied to know the seasonal
influence on their semen production potential. Overall mean
values for various seminal parameters viz. number of
ejaculates per month, semen volume (ml), sperm concentration
(106/ml), sperm output per ejaculate (million), initial
motility (%) and post thaw motility (%) were 10.85, 4.39 ±
0.04, 944.47 ± 10.07, 4076.27 ± 50.23, 68.20 ± 0.18 and
50.52 ± 0.06, respectively. The season had significant
(P<0.05) effect on sperm concentration, sperm output per
ejaculate and initial motility; whereas, ejaculate volume
and post thaw motility were non-significant. Overall mean
values for number of ejaculates per month per bull, sperm
output per ejaculate, initial motility and post thaw
motility were best observed during the winter season.
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