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The accretion of copper and of zinc by the foetuses of prolific ewes

Published online by Cambridge University Press:  09 March 2007

R. B. Williams ,
I. McDonald  and
I. Bremner
R. B. Williams
Affiliation:
The Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
I. McDonald
Affiliation:
The Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
I. Bremner
Affiliation:
The Rowett Research Institute, Bucksburn, Aberdeen AB2 9SB
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Abstract

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1. The amounts of copper and zinc in the foetuses of ewes carrying from one to four lambs were measured at different stages of gestation and estimates were made of the amounts of these metals in their livers.

2. The accretion of Cu and Zn could be described by growth equations of the Gompertz form, from which could be derived estimates of the instantaneous and fractional rates of deposition of these metals in the foetal body.

3. Between the 80th and 144th day of gestation the instantaneous rates of deposition of the metals increased exponentially, and at the end of pregnancy were calculated to be 0.24 and 2.0 mg Cu and Zn/d respectively in the triplet lamb foetus. The corresponding total accretions were estimated to be 10 and 69 mg respectively.

4. The fractional rates of live-weight gain and of deposition of Cu were similar and decreased at similar rates; that of Zn deposition decreased much more slowly.

5. The proportion of whole-body Cu estimated to be in the liver was always greater than 50 %. The amount of Zn in the liver remained constant and contributed 72 % of the total body Zn at 80 d but only 8 % at 144d.

6. The relative amounts of Cu and of Zn accrued per unit body-weight gain were not constant during the development of the foetus. As foetal numbers increased the amounts of each metal deposited in the foetus decreased more rapidly than did foetal weight.

7. The results are discussed in relation to the demands for Cu and Zn during pregnancy in sheep.

Type
Papers on General Nutrition
Information
British Journal of Nutrition , Volume 40 , Issue 2 , September 1978 , pp. 377 - 386
Copyright
Copyright © The Nutrition Society 1978

References

Allcroft, R. (1952). Vet Rec. 64, 17.Google Scholar
Apgar, J. (1968). Am. J. Physiol. 215, 160.CrossRefGoogle Scholar
Barcroft, J. (1946). Researches on Pre-Natal Life, Vol. 1. Oxford: Blackwell.Google Scholar
Bremner, I. & Davies, N. T. (1975). Biochem. J. 149, 733.CrossRefGoogle Scholar
Bremner, I., Williams, R. B. & Young, B. W. (1977). Br. J. Nutr. 38, 87.CrossRefGoogle Scholar
Davies, N. T. & Williams, R. B. (1977). Br. J. Nutr. 38, 417.CrossRefGoogle Scholar
Hansard, S. L. & Mohammed, A. S. (1968). J. Anim. Sci. 27, 807.CrossRefGoogle Scholar
Hurley, L. S. & Swenerton, H. (1966). Proc. Soc. exp. Biol. Med. 123, 692.CrossRefGoogle Scholar
Innes, J. R. M. & Shearer, G. D. (1940). J. comp. Pathol. 53, 1.CrossRefGoogle Scholar
McDonald, I., Wenham, G. & Robinson, J. J. (1977). J. agric. Sci., Camb. 89, 373.CrossRefGoogle Scholar
McDougall, E. I. (1947). J. agric. Sci., Camb. 37, 337.CrossRefGoogle Scholar
Mills, C. F. & Dalgarno, A. C. (1972). Nature, Lond. 239, 171.CrossRefGoogle Scholar
Moss, B. R., Madsen, F., Hansard, S. L. & Gamble, C. T. (1974). J. Anim. Sci. 38, 475.CrossRefGoogle Scholar
Pryor, W. J. (1964). Res vet. Sci. 5, 123.CrossRefGoogle Scholar
Robinson, J. J., McDonald, I., Fraser, C. & Crofts, R. M. J. (1977). J. agric. Sci., Camb. 88, 539.CrossRefGoogle Scholar
Saunders, R. W. (1977). Biochem. Soc. Trans. 5, 447.CrossRefGoogle Scholar
Suttle, N. & Price, J. (1976). Anim. Proc. 23, 233.Google Scholar
Underwood, E. J. (1977). Trace Elements in Human and Animal Nutrition, 4th ed.New York and London: Academic Press.Google Scholar
Wainman, F. W., Blaxter, K. L. & Pullar, J. D. (1970). J. agric. Sci., Camb. 74, 311.CrossRefGoogle Scholar
Wallace, L. R. (1948). J. agric. Sci., Camb. 38, 243.CrossRefGoogle Scholar
Williams, R. B. & Bremner, I. (1976). Proc. Nutr. Soc. 35, 86A.Google Scholar
Williams, R. B., Davies, N. T. & McDonald, I. (1977). Br. J. Nutr. 38, 407.CrossRefGoogle Scholar
Williams, R. B., Demertzis, P. & Mills, C. F. (1973). Proc. Nutr. Soc. 32, 3A.Google Scholar