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Age, weight or total feed intake as bases for the performance testing of growing pigs

Published online by Cambridge University Press:  02 September 2010

G. A. Lodge ,
D. Lister ,
J. D. Wood  and
M. S. Wolynetz
G. A. Lodge
Affiliation:
ARC Meat Research Institute, Langford, Bristol BS18 7DY
D. Lister
Affiliation:
ARC Meat Research Institute, Langford, Bristol BS18 7DY
J. D. Wood
Affiliation:
ARC Meat Research Institute, Langford, Bristol BS18 7DY
M. S. Wolynetz
Affiliation:
ARC Meat Research Institute, Langford, Bristol BS18 7DY
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Abstract

In an experiment which showed that the results of a genotype comparison are influenced by the design of the test, 16 castrated male and 16 female pigs of each of Large White (LW) and Gloucester Old Spot (GOS) breeds were allocated equally among four treat- ments: WW—rationed by weight and slaughtered by weight; A A—rationed by age and slaughtered by age; AW—rationed by age and slaughtered by weight; and WF—rationed by weight and slaughtered after a common total feed intake. The experiment was designed so that performance of LW would be similar on all treatments, and the degree to which the GOS differed from the LW on each of these treatments was then evaluated. All pigs started on the experiment at 12 weeks of age, at which time mean weight of the LW was 14% greater than the mean for the GOS. The only between- breed difference that was statistically significant (P<0·05) on all treatments was weight of lean. Average daily gain and efficiency of feed conversion were significantly different between breeds only on the WW treatment. Weight of fat was significantly different on WW and AW but not on AA or WF.

Type
Research Article
Information
Animal Production , Volume 27 , Issue 3 , December 1978 , pp. 345 - 354
Copyright
Copyright © British Society of Animal Science 1978

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References

REFERENCES

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