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Journal of Dairy Science Vol. 47 No. 1 87-89
© 1964 by American Dairy Science Association ®
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Bovine Semen Metabolism. VI. Comparative Effects of Initial Fructose Level and Incubation Temperature on Fructolysis and Sperm Motility1

N. Nashed2, J. P. Mixner and R. E. Mather

Department of Animal Sciences, New Jersey Agricultural Experiment Station, Sussex

ABSTRACT

Forty-four semen ejaculates from 12 bulls were used in a 3 x 3 factorial experiment to study the effects of three initial fructose levels (1.25, 1.96, and 4.81 mg/ml) and three incubation temperatures (27, 37, and 47 C) over a 3-hr incubation period on fructolysis and motility.

Increases in initial fructose levels and in the incubation temperatures caused increases in fructolysis in all instances with the exception of the highest initial fructose level at the highest incubation temperature. Motility responses were similar, except that they were depressed markedly at the high initial fructose level with all incubation temperatures. Thus, depression of motility anticipated and preceded the depression in fructolysis. Hyperstimulation of the sperm may have interfered with the recycling of ATP-ase. It is also possible that structural changes in the sperm proteins (denaturation?) may have led to paralysis of the contractile mechanism before actual cell death.

FOOTNOTES

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

2 Present address: Laboratorium D. Chirurg. Univ. Klinik, Hugstetterstrasse 55, Freiburg 1 Br., Germany.






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Copyright © 1964 by the American Dairy Science Association ®.