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A note on efficacy of complete v. partial boar exposure on puberty attainment in the gilt

  • S. G. Deligeorgis (a1), D. C. Lunney (a1) and P. R. English (a1)

Abstract

Sixty-three Large White ♂ × (Landrace ♂ × Large White ♀) ♀ gilts were allocated to one of three treatments as follows: (i) boar contact for 20 h/day; (ii) boar influence through a mesh pen division for 20 h/day; and (iii) control, which had no boar exposure.

The experiment started when gilts averaged 156 days of age, and continued until either puberty was detected or the age of 210 days was reached. Analysis revealed significant differences between groups for proportion of gilts reaching puberty (0·76, 0·38 and 0·19), the interval from stimulation to-puberty (10·4, 34·1 and 36·7 days) and age at puberty (167·9, 192·2 and 191·2 days) respectively.

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References

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Anderson, L. L. and Melampy, R. M. 1972. Factors affecting ovulation rate in the pig. In Pig Production (ed. Cole, D. J. A.), pp. 329366. Butterworth, London.
Brooks, P. H. and Cole, D. J. A. 1970. The effect of the presence of a boar on the attainment of puberty in gilts. J. Reprod. Fen. 23: 435440.
Kirkwood, R. N. and Hughes, P. E. 1980. A note on the efficacy of continuous v. limited boar exposure on puberty attainment in the gilt. Anim. Prod. 31: 205207.
Perry, G. C. 1982. The role of olfaction in the reproductive behaviour of pigs. Pigs News Inf. 3:(1), 1115.
Zimmerman, D. R., Bourn, P. and Donovan, D. 1976. Effect of "transport phenomenon" stimuli and boar exposure on puberty in gilts. J. Anim. Sci. 42: 1362 (Abstr.).

A note on efficacy of complete v. partial boar exposure on puberty attainment in the gilt

  • S. G. Deligeorgis (a1), D. C. Lunney (a1) and P. R. English (a1)

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