Fertility of Ram Spermatozoa Following Pellet Freezing on Dry Ice At ?79 And ?140°C

Abstract

The fertility obtained with ram semen pellet frozen on dry ice (-79°0) (Lightfoot and Salamon 1970; Salamon and Lightfoot 1970) has stimulated further investigation. Information was also needed on fertility of ram spermatozoa pelleted at a temperature below -79°C (Salamon 1970) and this communication presents the results of two experiments and treatment comparisons for each.