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Bovine Semen Metabolism. V. Influence of Incubation Temperature on Certain Measures of Fructolysis¹

Department of Dairy Science, New Jersey Agricultural Experiment Station, Sussex

ABSTRACT

Twenty bull semen samples were used to determine the effects of incubation temperature and length of incubation period on fructolysis. Split ejaculates were incubated at 27, 37, and 47° C. and fructose utilizations were determined at 60, 120, and 180 min. Increase in temperature of incubation resulted in increased utilization, but had no effect on the fructolysis coefficient (Kv). For every 1° C. increase in incubation temperature, there was a 4.22% increase in fructose utilization and a 3.84% increase in maximum fructose utilization (MFU). The role of fructose as a rate-limiting factor was suggested by its effect on the 2nd- and 3rd-hr. fructose utilizations at 47° C. The routine addition of fructose to all incubated semen samples was suggested, to prevent fructose concentration from becoming a rate-limiting factor.

¹ Paper of the Journal Series, New Jersey Agricultural Experiment Station, Rutgers University, the State University of New Jersey, Department of Dairy Science, New Brunswick. This work was supported in part by a grant-in-aid from the National Association of Artificial Breeders.

² Present address: Department of Physiology and Pharmacology, New York Medical College, Flower and Fifth Avenue Hospital, New York City.