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Factors Influencing the Metabolic Activity of Bovine Spermatozoa. V. Season

Department of Dairy Science, University of Illinois, Urbana

ABSTRACT

The aerobic metabolic activity (oxygen consumption, fructose utilization, and lactic acid accumulation) of semen and washed spermatozoa from collections made from eight bulls during two seasons (winter and summer) and 2 yr. was determined in two diluents and three treatments. The treatments included the suspension of washed cells in diluent containing fructose or diluted seminal plasma from the same ejaculate or that from the same bull stored from the previous season. Summer-collected cells lived through the 4-hr. incubation at 37° C. better, consumed more oxygen, and accumulated less lactic acid whether incubated as semen or as washed cells resuspended in fructose or in their own diluted seminal plasma. Diluted seminal plasma of the previous season reversed some of these trends. The primary though not exclusive seasonal effect in metabolism resides in the cells.

¹ Present address: The Tyler Clinic, 921 Westwood Blvd., Los Angeles, California.