Although buffalo bulls breed the year round, conflicting reports havebeen published about semen quality and volume at different ages andduring various seasons of the year. Better semen quantity of buffalo bullhas been reported during the hot and humid summer than in coldermonths (WIERZBOWSKI and TAHIR, 1980; SINGH et al., 1992), butcontrary observations have also been published (LI et al., 1988). Similarly,significantly (P<0.05) inferior (ERB et al., 1942; BHATTACHARYA 1968;BHOSREKAR, 1980; RAO, 1984) and superior semen quality has beenreported during summer (SINGH et al., 1992). SAEED (1988), reported thebest quality semen at 3-4 years of age. He concluded that the age of thebull and season of the year significantly affect semen characteristics butthat variations in these parameters do exist even in the same season andat same age in different localities.Although information on semen quality with reference to age andseason is available separately, no effort has been made study itcomprehensively, including both healthy and abnormal bulls together. Thepresent study was therefore planned with the following objectives: 1) tostudy the effect of age and season on semen volume and quality in healthyand abnormal (having poor semen quality, Table 1) Nili-Ravi buffalobulls; 2) to study the differences in the above-mentioned parametersbetween healthy and abnormal Nili-Ravi buffalo bulls; 3) to investigate therelationship between semen characteristics in Nili-Ravi buffalo bulls.
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