HOME HELP FEEDBACK SUBSCRIPTIONS ARCHIVE SEARCH TABLE OF CONTENTS		QUICK SEARCH:   [advanced] Author: Keyword(s): Year:  Vol:  Page:

This Article Full Text (PDF) Alert me when this article is cited Alert me if a correction is posted Services Similar articles in this journal Alert me to new issues of the journal Download to citation manager Citing Articles Citing Articles via Google Scholar Google Scholar Articles by Etgen, W. M. Articles by Ely, F. Search for Related Content PubMed Articles by Etgen, W. M. Articles by Ely, F.

Use of Mechanical Refrigeration in Preservation of Bull Semen^{1, 2, 3,}

Department of Dairy Science, Ohio Agricultural Experiment Station, Wooster and The Ohio State University, Columbus

ABSTRACT

Twelve ejaculates from nine bulls were frozen and stored under mechanical and dry-ice refrigeration. Portions of each ejaculate remained under the two storage conditions for a 24-week period. At various intervals, semen samples were transferred from one storage condition to the other. Samples were evaluated at the end of each period for per cent of live cells and motility, to obtain an estimate of the quality of the sample.

Under conditions of the experiment, evaluations of the samples indicate that mechanical refrigeration is superior to dry-ice refrigeration in maintaining quality of frozen semen. It is also indicated that semen samples may be transferred from mechanical refrigeration (–96° C.) to dry ice, and vice versa, without reducing their quality below that normally obtained by dry-ice refrigeration.

¹ Contribution to North Central Regional Project NC-2, Improvement of Dairy Cattle Through Breeding.

² The material herein reported was taken from the data submitted by the senior author in partial 'fulfillment of the requirements for the degree, Master of Science, The Ohio State University, Columbus, Ohio, 1953.

³ The study was made possible through the assistance of Central Ohio Artificial Breeding Association, Richard Kellogg, Manager.