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Lipid Comparison in Angus Bulls, Induced Cryptorchids and Steers

Abstract

Two trials involving 50 Angus bulls, 49 Angus induced cryptorchids and 51 Angus steers were utilized to study fatty acid composition of sub-cutaneous tissue and M. longissimus acquired at slaughter. In addition serum lipid concentration was determined on blood samples taken at the initiation and completion of the growing and finishing period. Serum lipid levels were lower at the completion of the feeding periods for all three sex types. Bulls possessed lower serum lipid concentrations, steers the highest and induced cryptorchids were intermediate. Bulls tended to possess lower concentration of subcutaneous tissue and M. longissimus C14:0, C14:1, C16:0 and C16:1 and more C18:0, C18:1 and C18:2 fatty acid than steers. Induced cryptorchid fatty acid concentration tended to be intermediate between bulls and steers.

¹ Published with the approval of the Director as Paper Number 3646, Journal Series, Nebraska Agricultural Experiment Station. Research reported was conducted under Project No. 13-3.

² The authors wish to express their gratitude to Mr. M. Prokop for his laboratory assistance with the serum lipid determinations and Dr. P. J. Cunningham for his assistance with the statistical analysis.