J. Anim Sci.
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J. Anim Sci. 1974. 39:488-492.
© 1974 American Society of Animal Science
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Live and Carcass Characteristics of Holstein Castrated, Short Scrotum and Intact Males1

L. L. Wilson, M. C. Rugh, J. H. Ziegler and T. J. McAllister2

The Pennsylvania State University, University Park 16802

Abstract

Thirty male Holstein calves were allotted at an average age of 63 days to three treatments: a) intact bulls; b) shortened scrotums; and c) castrated. An additional 10 calves were used to determine rate of testicle enlargement between 63 and 190 days of age. The three groups of cattle were slaughtered at the same average age of 402 days. Mean growth rates of the steer and short scrotum calves were similar to 190 days of age, but significantly (P< .05) less than that for bulls. From 190 to 402 days of age, there were significant (P< .01) ADG differences between each of the three sex conditions. However, the means for carcass weight/day of steer and short scrotum cattle did not differ significantly, and both were less (P< .01) than the corresponding means for bulls. Mean testicle weight of bulls was twice the mean testicle weight of short scrotum cattle at slaughter. The means for characteristics measuring carcass cutability were similar for bull and short scrotum cattle, with steer carcasses generally having more itermuscular fat and smaller longissimus muscle areas. Means for organoleptic characters were similar or more desirable for bull carcasses. These results indicate that there is little to be gained by using the short scrotum procedure.

Footnotes

1 Approved for publication by the Director, The Pennsylvania Agricultural Experiment Station; Paper No. 4523 of the Journal Series Authorized for Publication on August 29, 1973.

2 Appreciation is expressed to East Carson Packing Co., Pittsburgh, Pennsylvania for their cooperation.






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