[Effect of tropical climate on the androgenic activity of various strains of bulls]

By means of experiments the effect of a tropical climate on the androgenic activity of bulls expressed by the fructose level in the sperm was proved as well as a direct dependence of its concentration on the volume of the ejaculate and an indirect dependence on the density of spermatozoa. Besides this also its positive relation to the vitamin C level and to the polarographic and hemolytic activity of the sperm was proved. From the results obtained the conclusion has been drawn that the androgens affect the protein, vitamin and enzymic structures of the sperm.