Am. Soc. Anim. Prod.
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Am. Soc. Anim. Prod. 1937:311-316
© 1937 American Society of Animal Science
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Measurement of Reproductive Capacity as an Aid in Selection of Rams of High Fertility

(A Preliminary Report)

C. E. Terrill

United States Department of Agriculture, Dubois, Idaho

Abstract

Procedures for measuring breeding capacity in the ram by means of semen tests are presented. Higher levels of breeding capacity seem in general to be associated with more ejaculations in a given period, larger volumes of semen, higher concentrations of spermatozoa, better motility, longer duration of viability and a higher proportion of normal spermatozoa. Marked individual differences in breeding capacity, as indicated by the semen tests, were found.






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Copyright © 1937 by the American Society of Animal Science.