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The physical relationships of the abdominal organs in the pregnant ewe

Published online by Cambridge University Press:  27 March 2009

J. M. Forbes
J. M. Forbes
Affiliation:
School of Agricultural Sciences, Leeds University
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Summary

Five non-pregnant ewes and seventeen ewes at various stages of pregnancy were fed on a medium quality hay for several weeks before being slaughtered and frozen. Each ewe was sawn into 5 cm cross-sections.

The sections were photographed. The uterus was extracted from the sections and its volume measured. Volumes of reticulo-rumen contents, intestinal contents and abdominal fat were estimated from the photographs.

Models of the uterus and rumen were constructed and examples of these and of the photographs are shown.

The volume of the uterus increased steadily as pregnancy progressed, but rumen volume was not reciprocally depressed until the last 5 weeks of pregnancy. Volume of digesta was inversely related to volume of incompressible abdominal content (uterus and fat). Abdominal fat was a particularly important factor in the depression of rumen capacity in pregnancy when there was great competition for space in the abdomen.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 70 , Issue 2 , April 1968 , pp. 171 - 177
Copyright
Copyright © Cambridge University Press 1968

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References

REFERENCES

Campling, R. C. & Baich, C. C. (1961). Factors affecting the voluntary feed intake of the cow. I. Preliminary observations on the effect, on the voluntaryintake of hay, of changes in the amount of the retioulorumen contents. Br. J. Nutr. 15, 523–30.Google Scholar
Davies, H. L. (1962). Intake studies in sheep involving high fluid intake. Proc. Aust. Soc. Anim. Prod. 4, 167–71.Google Scholar
Forbes, J. M. (1966). Investigation of the abdominal anatomy in the ewe by serial sectioning. Proc. IX Int. Congr. Anim. Prod., Edinburgh, p. 28.Google Scholar
Forbes, J. M., Rees, J. K. S. & Boaz, T. G. (1967). Silage as a feed for pregnant ewes. Anim. Prod. 9, 399–408.Google Scholar
Hecker, J. F., Budtz-Olden, O. E. & Ostwald, M. (1964). The rumen as a water-store in sheep. Aust. J. agric. Res. 15, 961–8.CrossRefGoogle Scholar
Hyden, S. (1961). Determination of the amount of fluid in the reticulo-rumen of the sheep and its rate of passage to the omasum. Ann. Roy. Agric. Coll. Sweden 27, 51–79.Google Scholar
Johns, A. T., Ulyatt, M. J. & Glenday, A. C. (1963). Pasture type in relation to live-weight gain, carcass composition, iodine nutrition and some rumen characteristics of sheep. IV. Some rumen characteristics of sheep. J. agric. Sci., Camb. 61, 201–8.CrossRefGoogle Scholar
Lagerlof, N. (1929). Investigations of the topography of the abdominal organs in cattle, and some clinical observations and remarks in connection with the subject. Skand. VetTidskr. 19, 253–365.Google Scholar
Mäxelä, A. (1956). Studies on the question of bulk in the nutrition of farm animals with special reference to cattle. Suom. maatal. Seur. Julk. (Ada Agralia Fennica), 85, 1–130.Google Scholar
Rbid, R. L. & Hinks, N. T. (1962). Studies on the carbohydrate metabolism of sheep. XVII. Feed requirements and voluntary feed intake in late pregnancy with particular reference to prevention of hypoglycaemia and hyperketonaemia. Aust.Rea. 13, 1092–111. J. agric.Google Scholar
Sand, G. (1909). Et Bidrag til Belysring au Borslyngringens Aetiologiog Patogenese. [Etiology and pathogenesis of displacement of the uterus.] Maanedsskr. Dyrlag. 21, 49.Google Scholar
Tayler, J. C. (1959). A relationship between weight of internal fat, ‘fill’, and herbage intake of grazing cattle. Nature, Lond. 184, 2021–2.CrossRefGoogle Scholar
Winters, L. M. & Feutfel, G. (1936). Studies on the physiology of reproduction in sheep. IV. Foetal development. Tech. Bull. Minn, agric. Exp. Sta. no. 118.Google Scholar