Hostname: page-component-78c5997874-j824f Total loading time: 0 Render date: 2024-11-02T22:29:45.575Z Has data issue: false hasContentIssue false
  • English
  • Français

The growth to maturity of lean and fat lines of broiler chickens fed diets of different protein content: Evaluation of a model to describe growth and feeding characteristics

Published online by Cambridge University Press:  02 September 2010

C. C. Whitehead  and
J. R. Parks
C. C. Whitehead
Affiliation:
AFRC Institute for Grassland and Animal Production, Poultry Department, Roslin, Midlothian EH25 9PS
J. R. Parks
Affiliation:
Department of Animal Husbandry, University of Sydney, NSW 2006, Australia
Get access

Abstract

Body weight and food intake were measured at different ages up to 30 weeks in males and 21 weeks in females in lean, fat and commercial lines of broiler chickens given diets of different crude protein content. The lean and fat lines showed no differences in rates of body-weight gain or final body weights but the lean line had consistently lower food intakes. Dietary protein concentration within the ranges studied did not influence final body weights.

Equations derived from a theory of feeding and growth were used along with the data up to 21 weeks of age to calculate mature body weights and various feeding characteristics. These values were compared with those obtained by application of the theory to another set of broiler data. The theory was found to be sufficiently robust to give some consistent interpretations of data from experiments involving considerable differences in time, breed and diet.

Type
Research Article
Information
Animal Production , Volume 46 , Issue 3 , June 1988 , pp. 469 - 478
Copyright
Copyright © British Society of Animal Science 1988

Access options

Get access to the full version of this content by using one of the access options below. (Log in options will check for institutional or personal access. Content may require purchase if you do not have access.)

References

REFERENCES

Griffin, H. D., Whitehead, C. C. and Broadbent, L. A. 1982. The relationship between plasma triglyceride concentrations and body fat content in male and female broilers — a basis for selection? British Poultry Science 23: 15–23.CrossRefGoogle ScholarPubMed
Leclercq, B., Blum, J. C. and Boyer, J. P. 1980. Selecting broilers for low or high abdominal fat: initial observations. British Poultry Science 21: 107–113.CrossRefGoogle Scholar
Leclercq, B., Kouassi-Kouakou, J. and Simon, J. 1985. Laying performances, egg composition, and glucose tolerance of genetically lean or fat meat-type breeders. Poultry Science 64: 1609–1616.CrossRefGoogle ScholarPubMed
Lilburn, M. S., Leach, R. M., Buss, E. G. and Martin, R. J. 1982. The developmental characteristics of two strains of chickens selected for differences in mature abdominal fat pad size. Growth 46: 171–181.Google ScholarPubMed
March, B. E., MacMillan, C. and Chu, S. 1984. Characteristics of adipose tissue growth in broiler-type chickens to 22 weeks of age and the effects of dietary protein and lipid. Poultry Science 63: 2207–2216.Google Scholar
Parks, J. R. 1982. A Theory of the Feeding and Growth of Animals. Springer-Verlag, Berlin.Google Scholar
Touchburn, S., Simon, J. and Leclercq, B. 1981. Evidence of a glucose-insulin imbalance and effect of dietary protein and energy level in chickens selected for high abdominal fat content. Journal of Nutrition 11: 325–335.CrossRefGoogle Scholar
Whitehead, C. C. and Griffin, H. D. 1984. Development of divergent lines of lean and fat broilers using plasma very low density lipoprotein concentrations as selection criterion: the first three generations. British Poultry Science 25: 573–582.CrossRefGoogle ScholarPubMed