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Studies of the skeleton of the sheep V. Radiographic and chemical investigations of the skeleton of Scottish Blackface ewes and wethers on three hill farms in Scotland

Published online by Cambridge University Press:  27 March 2009

D. Benzie ,
E. Cresswell ,
J. Duckworth ,
R. Hill  and
A. W. Boyne
D. Benzie
Affiliation:
The Rowett Research Institute, Bucksburn, Aberdeen
E. Cresswell
Affiliation:
The Rowett Research Institute, Bucksburn, Aberdeen
J. Duckworth
Affiliation:
The Rowett Research Institute, Bucksburn, Aberdeen
R. Hill
Affiliation:
The Rowett Research Institute, Bucksburn, Aberdeen
A. W. Boyne
Affiliation:
The Rowett Research Institute, Bucksburn, Aberdeen
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Extract

1. Studies on the mineralization of the skeletons Scottish Blackface wethers and breeding ewes have been carried out on three widely scattered and differing Scottish hill farms using field radiography and bone-ash analysis.

2. Regular small autumnal improvements in the density of the ewes' skeletons were detected by in vivo radiography using the right radii although, in general, the radii of the ewes were at all times considered to be in good condition (for Scottish Blackface sheep on the hill) and underwent no marked resorption (as judged from in vivo radiographs) during pregnancy and lactation. This was contrary to what was expected in view of the results of previously reported laboratory experiments (Benzie et al. 1955, 1956, 1959) and also in view of commonly held beliefs that hill pastures are, in general, deficient in calcium or phosphorus, or both of these dietary factors.

3. There were few significant flock differences (both ewes and wethers) for the values assigned to the radiographs or for the results of skeletal ash determinations even though the flocks were maintained in widely separated and differing locations and husbandry systems.

4. It is suggested that further field work along these lines may be of great value to the obtaining of a clearer understanding of the ewe: hill pasture relationship.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 57 , Issue 3 , November 1961 , pp. 395 - 399
Copyright
Copyright © Cambridge University Press 1961

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References

REFERENCES

Benzie, D., Boyne, A. W., Dalgarno, A. C., Duckworth, J., Hill, R. & Walker, D. M. (1955). J. Agric. Sci. 46, 425.CrossRefGoogle Scholar
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Benzie, D., Boyne, A. W., Dalgarno, A. C., Duckworth, J. & Hill, R. (1959). J. Agric. Sci. 52, 1.CrossRefGoogle Scholar