Effect of season, age and period on semen quality traits in buffalo bulls.

This study investigated the effect of season, age and period on semen traits in buffalo bulls. Data collected during the year 2010–2021 for seven semen traits viz. ejaculate volume (VOL), sperm concentration (SPC), mass activity (MA), initial motility (BFM), post-thaw motility (PTM), number of sperms per ejaculate (NSP) and number of motile sperm (NMSP) from Murrah buffalo bulls (<italic>n </italic>= 45; aged: 24–75 months). A general mixed model was applied to obtain the R2 value which was the proportion of variation in semen variable. With study period, the highest SPC was obtained during 2012; with the season, the highest VOL (ml) in hot humid and the highest SPC during the hot-dry season and with age, higher VOL, SPC, NSP and NMSP was obtained in older bulls. This study showed that factors i.e. period, season and age had a significant effect on semen traits <italic>viz</italic>. VOL, MA, SPC, BFM, PTM, NSP and NMSP in buffalo bulls. [ABSTRACT FROM AUTHOR]