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Variation in the concentration of copper in the blood plasma of Finnish Landrace and Merino sheep and their crosses with reference to reproductive performance and age

Published online by Cambridge University Press:  02 September 2010

Susan Hayter ,
Gerald Wiener  and
A. C. Field
Susan Hayter
Affiliation:
ARC Animal Breeding Research Organisation, West Mains Road, Edinburgh EH9 3JQ
Gerald Wiener
Affiliation:
ARC Animal Breeding Research Organisation, West Mains Road, Edinburgh EH9 3JQ
A. C. Field
Affiliation:
Moredun Research Institute, Gilmerton, Edinburgh EH17 7JH
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Summary

Concentrations of copper in blood plasma were determined in January and in February 1971 and in February and March 1972 in a grassland flock of sheep comprising the Finnish Landrace and (Tasmanian) Merino breeds and their reciprocal crosses. Numbers of animals ranged from 30 to 100. The unadjusted mean copper levels of the flock varied from 63 to 81 μg/100 ml. The Finnish Landrace had a markedly lower plasma copper concentration than did the Merino, the mean difference after adjustment for other factors varied from 16 to 54 μg/100 ml. First crosses had levels halfway between those of the parental breeds. Copper concentration fell in the 4-week period between February and March 1972 when most of the ewes were pregnant. This fall was greatest for the Finnish Landrace which started with the lowest level and least for the Merino.

Neither the breed differences in the change in level nor the actual concentration appeared to be related to the number of lambs (0 to 4) carried by the ewes. Variation in copper level associated with the age of ewe, significant for the two bleedings in 1972, was largely attributable to the higher level among the youngest age class, approximately 10 months old when bled. The stage of pregnancy at the time of blood sampling, as reflected by date of lambing, did not significantly affect plasma copper concentration in this flock.

Type
Research Article
Information
Animal Production , Volume 16 , Issue 3 , June 1973 , pp. 261 - 269
Copyright
Copyright © British Society of Animal Science 1973

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References

REFERENCES

Donald, H. P. and Read, J. L. 1967. The performance of Finnish Landrace sheep in Britain. Anim. Prod. 9: 471–476.Google Scholar
Eden, A. 1939. The influence of varying copper intake on normal blood copper levels of Northumbrian sheep. J. comp. Path. Ther. 52: 249–257.Google Scholar
Lüke, Von F. and Wiemann, H. 1970. [Chronic copper poisoning and copper retention in the liver of sheep of different types]. Berl. Münch. Tieräarztl. Wschr. 83: 253–255.Google Scholar
Poole, D. B. R. 1970. An outbreak of swayback in lambs, with particular reference to breed susceptibility. Ir. vet. J. 24: 189–192.Google Scholar
Summers, Reuby M. 1960. Micro-determination of serum copper. Analyt. Chem. 32: 1903–1904.CrossRefGoogle Scholar
Underwood, E. J. 1971. Trace Elements in Human and Animal Nutrition. 3rd ed. Academic Press, New York and London.Google Scholar
Wiener, G. 1966. Genetic and other factors in the occurrence of swayback in sheep. J. comp. Path. Ther. 76: 435–447.CrossRefGoogle ScholarPubMed
Wiener, G. and Field, A. C. 1966. Blood copper levels in sheep in relation to genetic factors, parity and previous swayback history. Nature, Lond. 209: 835–836.CrossRefGoogle ScholarPubMed
Wiener, G. and Field, A. C. 1969a. The concentration of minerals in the blood of genetically diverse groups of sheep. III. Correlations among calcium, phosphorus, magnesium, potassium, sodium, chlorine and copper concentrations. J. agric. Sci., Camb. 73: 275–278.Google Scholar
Wiener, G. and Field, A. C. 1969b. Copper concentrations in the liver and blood of sheep of different breeds in relation to swayback history. J. comp. Path. Ther. 19: 7–14.CrossRefGoogle Scholar
Wiener, G. and Field, A. C. 1971a. The concentration of minerals in the blood of genetically diverse groups of sheep. V. Concentrations of copper, calcium, phosphorus, magnesium, potassium and sodium in the blood of lambs and ewes. J. agric. Sci., Camb. 76: 513–520.CrossRefGoogle Scholar
Wiener, G. and Field, A. C. 1971b. Genetic variation in mineral metabolism of ruminants. Proc. Nutr. Soc. 30: 91–101.Google Scholar
Wiener, G., Field, A. C. and Jolly, G. M. 1970. The concentration of minerals in the blood of genetically diverse groups of sheep. IV. Factors influencing seasonal changes in copper concentration. J. agric. Sci., Camb. 75: 489–495.CrossRefGoogle Scholar
Wiener, G., Field, A. C. and Wood, Jean. 1969. The concentration of minerals in the blood of genetically diverse groups of sheep. I. Copper concentration at different seasons in Blackface, Cheviot, Welsh Mountain and crossbred sheep at pasture. J. agric. Sci., Camb. 72: 93–101.CrossRefGoogle Scholar
Wiener, G. and MacLeod, N. S. M. 1970. Breed, bodyweight and age as factors in the mortality rate of sheep following copper injection. Vet. Rec. 86: 740–743.Google Scholar