Effect of Casein, Lecithin, Glycerol, and Storage At 5°C on Diluted Ram and Bull Semen

Abstract

The addition of casein and lecithin to a phosphate-saline diluent in which ram and bull spermatozoa were cooled to 5�C increased their subsequent viability at 37�C and the effects were additive. Casein and lecithin also increased the metabolism of fresh ram semen. After storage at 5�C, oxygen uptake and oxidation of lactate by ram and bull spermatozoa were lower than before storage. The decrease in the amount of fructose oxidized to carbon dioxide was greater.