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Effects of post-weaning stress and feeding management on return to oestrus and reproductive traits during early pregnancy in swine

Published online by Cambridge University Press:  02 September 2010

M. H. Fahmy  and
J. J. Dufour
M. H. Fahmy
Affiliation:
Research Station, Agriculture Canada, Lennoxville, Quebec JIM 1Z3, Canada
J. J. Dufour
Affiliation:
Research Station, Agriculture Canada, Lennoxville, Quebec JIM 1Z3, Canada
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Summary

A total of 177 sows representing five two-breed crosses were used in a 2×2 factorial experiment to study the effects of post-weaning stress (changing environment and group housing) and feeding regime (flushing by feeding ad libitum until mating) on the weaning-oestrus interval and other reproductive traits up to 30 days of pregnancy.

The group which was stressed had about 10% (P<0·05) fewer reproductive failures than those not stressed, while little difference was found between the two feeding regimes. About 61% of the flushed sows returned to oestrus within 7 days after weaning, 9% higher than for those not flushed. The stress treatment had little effect on the weaning-oestrus interval. Neither treatment affected ovarian and follicular-fluid weights, percentage of follicles of different sizes, ovulation rate nor number of viable embryos. The flushed group, however, had 9% lower embryo survival than the group not flushed. A positive relation was found between the number of days on ad libitum feeding and ovulation rate and embryonic mortality.

Differences among breeds were significant for all the traits, except weaning-oestrus interval, weight of follicular fluids, percentage of large follicles, ovulation and survival rates. The weaning-oestrus interval was not significantly correlated with any of the reproductive traits studied.

Type
Research Article
Information
Animal Production , Volume 23 , Issue 1 , August 1976 , pp. 103 - 110
Copyright
Copyright © British Society of Animal Science 1976

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References

REFERENCES

Anderson, L. L. and Melampy, R. M. 1972. Factors affecting ovulation rate in the pig. In Pig Production (ed. Cole, D. J. A.), pp. 329–366. Butterworth, London.Google Scholar
Braude, R. 1973. The potential for improving sow productivity with particular reference to early weaning. In The Improvement of Sow Productivity, (ed. Jones, A. S., Fowler, V. R. and Yeats, J. C. R.), pp. 3–13. Rowett Research Institute, Aberdeen.Google Scholar
Brooks, P. H. and Cole, D. J. A. 1974. The effect of nutrition during the growing period and the oestrous cycle on the reproductive performance of the pig. Livest. Prod. Sci. 1: 7–20.CrossRefGoogle Scholar
Cole, D. J. A. and Brooks, P. H. 1973. Reproductive efficiency in sows. In lllrd World Conf. on Anim. Prod. 5(e): 39–40.Google Scholar
Dailey, R. A., Clark, J. R., First, N. L., Chapman, A. B. and Casida, L. E. 1972. Effects of high and low feeding at two stages of the estrous cycle on follicular development in gilts from four genetic groups. J. Anim. Sci. 35: 1210–1215.CrossRefGoogle ScholarPubMed
Dufour, J. J. and Fahmy, M. H. 1974. Follicular and luteal changes during early pregnancy in three breeds of swine. Can. J. Anim. Sci. 54: 29–33.CrossRefGoogle Scholar
Dufour, J. J. and Fahmy, M. H. 1975. Embryonic mortality and development during early pregnancy in three breeds of swine with purebred and crossbred litters. Can. J. Anim. Sci. 55: 9–15.CrossRefGoogle Scholar
Du Mesnil du Buisson, F. and Signoret, J. P. 1962. [The influence of external factors on the onset of puberty in the gilt.] Annls Zoo tech. 11: 53–59.CrossRefGoogle Scholar
Harvey, W. R. 1960. Least squares analysis of data with unequal subclass numbers. United States Department of Agriculture, ARS-20-8 (Mimeograph).Google Scholar
MacLean, C. W. 1969. Observations on non-infectious infertility in sows. Vet. Rec. 85: 675–682.Google ScholarPubMed
Paredis, F. 1962. Fertility and artificial insemination in pigs. Int. J. Fert. 7: 223–233.Google ScholarPubMed
Salehar, A. 1965. [Conception in sows after weaning the litters.] Stočarstvo 19: 70–72.Google Scholar
Šchlegel, W. and Sklenar, V. 1972. [The effect of different management systems on reproductive performance in sows.] Tierzucht 26: 409–410.Google Scholar
Shearer, I. J. and Adam, J. L. 1973. Nutritional and physiological developments in reproduction of pigs. Proc. N.Z. Soc. Anim. Prod. 33: 62–86.Google Scholar
Signoret, J. P. 1972. The mating behaviour of the sow. In Pig Production, (ed. Cole, D. J. A.), pp. 295–313. Butterworth, London.Google Scholar
Sviben, M., Bajt, G., Čalehar, A., Herak, M. and Černe, F. 1969. [Effect on conception of the method of housing sows after mating.] Vet. Arh. 39: 241–244.Google Scholar
Van Der Heyde, H., Lievens, R., Van nieuwerburgh, G. and Doorme, H. 1974. [Reproduction in the sow as a function of different lactation lengths.] Revue Agric, Univ. de Gand. 27: 1153–1189.Google Scholar
Van Der Heyde, H., Van Nieuwerburgh, G. and Christiaens, J. 1973. Sow performance in relation to early weaning. In The Improvement of Sow Productivity (ed. Jones, A. S., Fowler, V. R. and Yeats, J. C. R.), pp. 35–42. Rowett Research Institute, Aberdeen.Google Scholar