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Factors affecting production records of lambs from a flock of East African Blackheaded sheep

Published online by Cambridge University Press:  27 March 2009

J. C. M. Trail  and
G. D. Sacker
J. C. M. Trail
Affiliation:
Department of Veterinary Services and Animal Industry, Uganda
G. D. Sacker
Affiliation:
Department of Veterinary Services and Animal Industry, Uganda
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Extract

1. The effects of age of ewe, and year, sex and type of birth of lambs on lamb weights between birth and weaning were measured and appropriate correction factors estimated in a flock of East African Blackheaded sheep maintained over an 11-year period in Western Uganda. These correction factors were then used to examine the effects of a long dry season at different stages of lamb growth.

2. On birth weights the effects of sex ranged from 0-25 lb. to 0-40 lb.; twinning 1-0 lb.; gimmer's lamb 0-5 lb. On 2-month weights the corresponding adjustments were 0-2 lb.-l-4 lb.; 5-1 lb.; 1-7 lb. On weaning weights 0-3 lb.-2-9 lb.; 6-0 lb.; 2-6 lb.

3. A long dry season during late pregnancy did not appear to affect lamb birth-weights and a dry season between 2 months and 5 months of age did not affect lamb weaning weights. However a dry season during the main suckling period from birth to 2 months of age significantly lowered lamb weights at 2 months of age.

Type
Research Article
Information
The Journal of Agricultural Science , Volume 66 , Issue 1 , February 1966 , pp. 87 - 91
Copyright
Copyright © Cambridge University Press 1966

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References

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