Skeletal development in the meat-type chicken
- 1 May 2000
- journal article
- research article
- Published by Informa UK Limited in British Poultry Science
- Vol. 41 (2), 141-149
- https://doi.org/10.1080/713654918
Abstract
1. This study ascertained how bone of modern meat-type chickens develops under typical commercial conditions and compares development with that in genetic precursor stock. 2. A modern fast-growing selected strain and a slower-growing control strain were used. Birds were weighed weekly. A random sample was taken from each population at a range of ages up to 39 d. 3. A tibiotarsus from each bird was X-rayed and its dimensions and estimated resistance to bending were determined. Cortical bone samples were ashed to measure total mineral, calcium and phosphorus content. Cortical samples were also taken for porosity assessment. 4. As expected, the selected strain grew faster and heavier than the control strain. Despite this, both strains demonstrated similar periods of rapid bone formation (days 4 to 18) and mineralisation (days 4 to 11), and achieved similar estimates of resistance to bending. 5. However, cortical bone of the selected strain was less well mineralised and more porous than that of the control strain and showed a significant increase in the molar Ca:P ratios above the expected range of values during the first 2 to 3 weeks of life. 6. Despite production of bones with the correct dimensions for load support, the relatively poor density and mineral content of bone in the selected strain is likely to reduce effective breaking strength of the tibiotarsus. Possible reasons may be either inadequate dietary supply of Ca and P or impaired utilisation of the minerals due to a rapid growth rate or genetic factors.Keywords
This publication has 16 references indexed in Scilit:
- Bone structure and strength at different ages in laying hens and effects of dietary particulate limestone, vitamin K and ascorbic acidBritish Poultry Science, 1998
- Reducing growth rate of broiler chickens with a low energy diet does not improve cortical bone qualityBritish Poultry Science, 1998
- IntroductionPoultry Science, 1996
- Some physico-chemical aspects of hydroxylapatiteJournal of Materials Science, 1996
- Determination of proliferative characteristics of growth plate chondrocytes by labeling with bromodeoxyuridineCalcified Tissue International, 1993
- Composition, cortical structure and mechanical properties of chicken tibiotarsi: Effect of growth rateBritish Poultry Science, 1992
- Prevalence of leg weakness in broiler chickens and its relationship with genotypeVeterinary Record, 1992
- Relationships between surface, volume, and thickness of iliac trabecular bone in aging and in osteoporosis. Implications for the microanatomic and cellular mechanisms of bone loss.JCI Insight, 1983
- Recovery of inter-block information when block sizes are unequalBiometrika, 1971
- Bone Carbonate and the Ca to P Molar RatioNature, 1968