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The effect of breed and of dried seaweed meal in the diet on the levels of copper in liver, kidney and plasma of sheep fed on a high copper diet

Published online by Cambridge University Press:  02 September 2010

J. G. Herbert ,
G. Wiener  and
A. C. Field
J. G. Herbert
Affiliation:
ARC Animal Breeding Research Organisation, West Mains Road, Edinburgh EH9 3JQ
G. Wiener
Affiliation:
ARC Animal Breeding Research Organisation, West Mains Road, Edinburgh EH9 3JQ
A. C. Field
Affiliation:
Moredun Research Institute, Gilmerton Road, Edinburgh EH17 7JH
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Abstract

Twenty-one mature ewes of each of two breeds, the Scottish Black-face and the Welsh Mountain, were allocated in equal numbers to three diets based on a complete cobbed feed with a 0, 5 and 15% inclusion of dried seaweed meal (Ascophyllum nodosum). All diets were made up to a Cu content of approximately 30 mg/kg by adding CuSO4 to the mix. Sheep were housed and fed individually for 15 weeks.

There was a significant breed difference in the Cu level of the liver dry matter; the Welsh increased by 316 mg/kg compared with 240 mg/kg in the Blackface and the amount of Cu accumulated in the liver per kg feed consumed was 0·66 mg in the Welsh and 0·46 in the Blackface. Diets also had a significant effect; the Cu levels in liver dry matter rose by 323, 293 and 220 mg/kg for the 0, 5 and 15% seaweed diets respectively and the Cu stored per kg feed consumed was 0·66, 0·61 and 0·41 mg respectively. There was no corresponding effect of diet on plasma Cu level, but there was a breed difference with Welsh higher than Blackface. Cu level in kidney dry matter showed a breed-by-diet interaction. Total food consumption did not differ among the treatments, and live-weight and carcass-weight data suggested no adverse effects from the inclusion of seaweed meal in the diet.

Type
Research Article
Information
Animal Production , Volume 26 , Issue 2 , April 1978 , pp. 193 - 201
Copyright
Copyright © British Society of Animal Science 1978

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References

REFERENCES

Bradfield, E. G. and Stickland, J. F. 1975. The determination of molybdenum in plants by an automated catalytic method. Analyst, Lond. 100: 1–6.CrossRefGoogle Scholar
Haug, A. 1961. The affinity of some divalent metals to different types of alginates. Ada chem. scand. 15: 1794–1795.CrossRefGoogle Scholar
Haug, A. and Smidsro, D. O. 1965. The effect of divalent metals on the properties of alginate solutions. II. Comparison of different metalions. Ada chem. scand. 19: 341–351.CrossRefGoogle Scholar
Jensen, A. 1972. The nutritive value of seaweed meal for domestic animals. Proc. 7th int. Seaweed Symposium, pp. 7–14. University of Tokyo Press.Google Scholar
McDowell, R. H. 1973. Properties of Alginates. Alginate Industries Ltd, London.Google Scholar
Smidsro, D. O. and Haug, A. 1965. The effect of divalent metals on the properties of alginate solutions. I. Calcium ions. Ada chem. scand. 19: 329–340.CrossRefGoogle Scholar
Suttle, N. F. 1974. A technique for measuring the biological availability of copper to sheep using hypocupraemic ewes. Br. J. Nutr. 32: 395–405.CrossRefGoogle ScholarPubMed
Suttle, N. F. and Field, A. C. 1974. The effect of dietary molybdenum on hypocupraemic ewes treated by subcutaneous copper. Vet. Rec. 95: 165–168.CrossRefGoogle ScholarPubMed
Suttle, N. F. and McLauchlin, M. 1976. Predicting the effects of dietary Mo and S on the availability of Cu to ruminants. Proc. Nutr. Soc. 35: 22A.Google Scholar
Thompson, R. H. and Blanchflower, W. J. 1971. Wet-ashing apparatus to prepare biological materials for atomic absorption spectrophotometry. Lab. Pract. 20: 859–861.Google ScholarPubMed
Wainman, F. W., Smith, J. S. and Dewey, P. J. S. 1975. The nutritive value for sheep of ruminant Diet AA6, a complete cobbed diet containing 30% barley straw. J. agric. Sci., Camb. 84: 109–111.CrossRefGoogle Scholar
Wiener, G., Field, A. C. and Smith, Carol. 1977. Deaths from copper toxicity of sheep at pasture and the use of fresh seaweed. Vet. Rec. 101: 424–425.CrossRefGoogle ScholarPubMed
Wiener, G., Field, A. C. and Wood, Jean. 1969. The concentration of minerals in the blood of genetically diverse groups of sheep. I. Copper concentrations at different seasons in Blackface, Cheviot, Welsh Mountain and crossbred sheep at pasture. J. agric. Sci., Camb. 72: 93–101.CrossRefGoogle Scholar
Wiener, G., Herbert, J. G. and Field, A. C. 1976. Variation in liver and plasma copper concentrations of sheep in relation to breed and haemoglobin type. J. comp. Path. 86: 101–109.CrossRefGoogle ScholarPubMed
Wiener, G., Suttle, N. F., Field, A. C., Herbert, J. G. and Wooliams, J. A. 1978. Breed differences in copper metabolism in the sheep. J. agric. Sci., Camb. In press.CrossRefGoogle Scholar