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Growth and lifetime production of scottish blackface hill ewes in relation to the level of feeding during rearing

Published online by Cambridge University Press:  02 September 2010

R. G. Gunn
R. G. Gunn
Affiliation:
Hill Farming Research Organisation, 29 Louder Road, Edinburgh, EH9 2JQ
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Summary

A study was made of the effects of different levels of nutrition between 3 and 6 months and between 6 and 12 months of age on subsequent growth to mature size, longevity and lifetime production of Scottish Blackface female sheep on a hill farm. Treatment differences between 3 and 6 months were small and resulted in only a 3 kg live-weight advantage for the animals receiving a high level of feeding. Treatment differences between 6 and 12 months were considerable and resulted in a mean 14 kg advantage for animals receiving a high level of feeding. Those animals remained significantly heavier until 42 months of age and significantly larger, as depicted by skeletal measurements, until 54 months of age.

A high level of feeding between 3 and 6 months of age had no significant long-term effect on wool growth ewe survival or lifetime lamb production, whereas a high level of feeding between 6 and 12 months of age had a significant positive effect on the mean number of lambs born per ewe over five lamb crops. This effect was not maintained to weaning, due to an apparently greater lamb mortality. Treatment effects on ewe survival and on flock lifetime production, although considerable, were not statistically different.

It is concluded that any advantages of improved feeding during rearing were largely lost through the inadequacy of the adult nutritional environment and only when the latter was not limiting would higher standards of rearing be justified.

Type
Research Article
Information
Animal Production , Volume 14 , Issue 3 , June 1972 , pp. 343 - 349
Copyright
Copyright © British Society of Animal Science 1972

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References

REFERENCES

Allden, W. G. 1968. Undernutrition of the Merino sheep and its sequelae. III. The effect on lifetime productivity of growth restrictions imposed at two stages of early post-natal life in a Mediterranean environment. Aust. J. agric. Res. 19: 981–996.CrossRefGoogle Scholar
Eadie, J. 1967. The nutrition of grazing hill sheep; utilisation of hill pastures. 4th Rep. Hill Farm. Res. Org., Edinburgh, 1964–67, pp. 38–45.Google Scholar
Gunn, R. G. 1967. Levels of first winter feeding in relation to performance of Cheviot hill ewes. IV. Body growth and development from 18 months to maturity. J. agric. Sci., Comb. 69: 341–344.CrossRefGoogle Scholar
Gunn, R. G. 1968. Levels of first winter feeding in relation to performance of Cheviot hill ewes. VI. Lifetime production from the hill. J. agric. Sci., Camb. 71: 161–166.CrossRefGoogle Scholar
Hunter, R. F. 1964. Home range behaviour in hill sheep. In Grazing in Terrestrial and Marine Environments, pp. 155–171. Blackwell's Scientific Publications, 1964.Google Scholar
Hunter, R. F. and Davies, G. E. 1963. The effect of method of rearing on the social behaviour of Scottish Blackface hoggets. Anim. Prod. 5: 183–194.Google Scholar