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The influence of the presence of the female on the sexual behaviour and plasma testosterone levels of the mature male pig

Published online by Cambridge University Press:  02 September 2010

P. H. Hemsworth
Affiliation:
Department of Agriculture, Animal Research Institute, Werribee, Victoria 3030, Australia
C. G. Winfield
Affiliation:
Department of Agriculture, Animal Research Institute, Werribee, Victoria 3030, Australia
W. A. Chamley
Affiliation:
Department of Agriculture, Animal Research Institute, Werribee, Victoria 3030, Australia
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Abstract

Twenty-seven mature boars were housed in individual pens for 9 weeks under one of the following social conditions: isolated from female pigs; near sexually non-receptive female pigs; and near sexually receptive female pigs. The sexual behaviour of the boars during the 9-week treatment period was observed weekly in standard 15- min tests. The sum of the individual courting behaviour activities and the total time spent ejaculating were significantly greater for the boars housed near either sexually receptive or sexually non-receptive females than for those boars isolated from female pigs (P<0·01 and P<0·05, respectively). Although the boars housed near sexually receptive and sexually non-receptive females achieved 43 and 38% more copulations, respectively, than those isolated from females, the difference was significant only for the latter comparison (P<005). There was no consistent difference in testosterone concentration over a 12-h period between boars housed near sexually-receptive females and those isolated from females.

Type
Research Article
Copyright
Copyright © British Society of Animal Science 1981

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References

Hemsworth, P. H. 1978. Social and sexual factors affecting reproduction of the domestic boar. Ph.D. Thesis, Univ. Melbourne.Google Scholar
Hemsworth, P. H., Findlay, J. K. and Beilharz, R. G. 1978. The importance of physical contact with other pigs during rearing on the sexual behaviour of the male domestic pig. Anim. Prod. 27: 201207.CrossRefGoogle Scholar
Hemsworth, P. H., Winfeld, C. G., Beilharz, R. G. and Galloway, D. B. 1977. Influence of social conditions post-puberty on the sexual behaviour of the domestic male pig. Anim. Prod. 25: 305309.CrossRefGoogle Scholar
Sokal, R. R. and Rohlf, F. J. 1969. Biometry: the Principles and Practice of Statistics in Biological Research. W. H. Freeman, San Francisco.Google Scholar
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