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Rapid Methods for Estimating the Quality of Bull Semen

Department of Animal Husbandry, Cornell University, Ithaca, New York

ABSTRACT

Certain methods have been used for making judgments of the potential fertilizing capacity of semen before it is used for actual breeding. The methods include the determination of (a) the duration of spermatozoan motility at a standard low temperature (9); (b) the glyolytic power of spermatozoa (1); (e) the oxygen consumption of spermatozoa (14) ; and (d) the resistance of spermatozoa to temperature shock (6), or to a 1.0 per cent sodium chloride solution (7).

Recent work in this laboratory has been directed at similar objectives. New techniques for testing quality of bull semen have been developed which may be employed in field artificial insemination with the simplest of equipment.

I. Motility Duration at High Temperatures

A study was undertaken to determine the relation between the duration of spermatozoan motility in a nutrient-buffer diluter at a standard low temperature and the duration of spermatozoan motility from the same semen ejaculations in the same diluter at higher temperatures.

¹ Now Assistant Professor of Dairy Husbandry, Kansas State College.