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A Study of the Metabolic Activity of Bull Semen and Spermatozoa in Relation to their Fertilizing Ability¹

University of Wisconsin

Abstract

An investigation was made to determine whether the potential fertilizing ability of a semen sample could be predicted from data on the respiratory metabolism of the semen and washed sperm in the absence as well as presence of added glycolysable substrate.

With 53 samples of semen collected from eight bulls a total of 702 inseminations was made. Correlations were determined between percentage fertility and each of the following metabolic characters: Z_O2 (1st hr.), average Z_O2 (1st and 2nd hr.), Z_O2 (1st hr.)/Z_O2 (2nd hr.), and average Z_O2/percent motility.

No significant correlation was found with any of the above characters with the exception of average Z_O2/percent motility which showed a negative correlation between bulls (P = 0.05).

¹ Published with the approval of the Director of the Wisconsin Agricultural Experiment Station, Madison. From the Departments of Biochemistry and Genetics. The authors gratefully acknowledge the cooperation of Dr. George Barrett who supervised the breeding records from which the fertility data in this paper were obtained.

² Government of India Research Fellow.

³ Department of Genetics.

⁴ Department of Biochemistry.