J. Anim Sci.
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J. Anim Sci. 1989. 67:15-19.
© 1989 American Society of Animal Science
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Bilateral Removal of the Cauda Epididymides in the Neonatal Pig as a Technique for Creating Teaser Boars1

S. Arkins, L. H. Thompson2, J. R. Giles, T. Camacho and B. D. Hosmon

University of Illinois3, Urbana 61801

Abstract

Five pairs of crossbred littermate boars were used to assess the efficacy of bilateral removal of the cauda epididymides at an early age as a technique for creating teaser boars. The cauda epidiymides were surgically removed in one of each litter pair; the other of the pair served as an intact control. Boars subjected to removal of the epididymides (Epid) were rendered sterile by the technique. The Epid-treated and control untreated littermate boars had similar levels of sexual aggression and libido, as measured by behavioral characteristics at semen collection. The Epid-treated boars showed a slight, but not significant, reduction in ejaculate volume. Upon slaughter at 273 d of age, Epid and control boars had similar weights for the accessory sexual organs and penis and similar penile lengths. The Epid-treated boars displayed enlarged caput epididymides and granulomata. It is suggested that bilateral removal of the cauda epididymides in the neonatal pig may prove a worthwhile alternative to the traditional vasectomy procedure to create teaser boars.

Footnotes

1 This study was a part of Project No. 35-0398 of the Agric. Exp. Sta., Univ. of Illinois at Urbana-Champaign. Additional funding was provided by the Illinois Pork Producers Assoc. (Grant No. 14 d) and by the Illinois Swine Progeny Testing Assoc. The authors gratefully acknowledge J. M. Stookey for care and handling of experimental animals, Henry Soto for advice on statistical analyses, Peggy Ann Eichen for technical assistance and Victoria Garza for preparation of the manuscript.

2 Address reprint requests to this author.

3 Dept. of Anim. Sci.






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