STUDY OF RELATIONSHIP OF AGE, TESTICULAR BIOMETRY AND SEMEN CHARACTERISTICS IN BULLS OF SAHIWAL AND FRIESIAN CROSSES

ABSTRACT

The present study was carried out on seventy-eight Karan Fries bulls (averaged age from 6 to 113 months) and thirty-one Sahiwal bulls (averaged aged from 6 to 94 months) for testicular biometry. Thirty-seven Karan Fries bulls (averaged aged from 25 to 113 months) and fourteen Sahiwal bulls (averaged aged from 37 to 94 months) were taken for semen evaluation in the present study. All animals were maintained from 6 months of age under intensive management conditions. The animals were classified into three age groups (AG1, AG2, AG3) for testicular biometry study; two age groups (SDAG1 and SDAG2) and two scrotal circumference groups (SCG1 and SCG2) for semen quality analysis. Parameters studied were body weight, age, height at wither, chest girth, scrotal circumference (SC), testicular length (TL), thickness (TT), scrotal skin thickness (SST), paired testicular volume (PTV) and testicular weight (TTWT); Semen quality parameters viz., volume, concentration, mass activity, progressive motility, non-eosinophilic sperm, acrosome integrity, and sperm abnormalities. The animals were examined twice and data collected and analysed on age, testicular measurement and seminal attributes. All the testicular measurements were found to be significantly correlated with age. Significant differences were found in the testicular measurements among different age groups. Between breeds some of the testicular measurements were found significantly different.

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REFERENCES

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Asian Journal of Dairy and Food Research

STUDY OF RELATIONSHIP OF AGE, TESTICULAR BIOMETRY AND SEMEN CHARACTERISTICS IN BULLS OF SAHIWAL AND FRIESIAN CROSSES

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