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Skeletal development in the meat-type chicken.

B Williams1, S Solomon, D Waddington

  • 1Roslin Institute (Edinburgh), Midlothian, Scotland.

British Poultry Science
|July 13, 2000
PubMed
Summary
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Dietary Ca and P requirements and skeletal quality in broiler chickens.

British poultry science·2000

Modern meat-type chickens exhibit faster growth but develop less dense and more porous bones compared to precursor stock. This bone quality may compromise tibiotarsus strength despite adequate dimensions for load support.

Area of Science:

  • Animal Science
  • Poultry Science
  • Bone Biology

Background:

  • Modern meat-type chickens are selected for rapid growth, potentially impacting skeletal development.
  • Understanding bone development in commercial conditions is crucial for poultry welfare and production.

Purpose of the Study:

  • To compare bone development in fast-growing meat chickens versus slower-growing genetic precursors.
  • To assess bone dimensions, mineral content, and porosity under commercial conditions.

Main Methods:

  • Comparative study of two chicken strains (fast-growing vs. control).
  • Weekly weighing and X-ray analysis of tibiotarsus dimensions and bending resistance.
  • Ashing for mineral content (calcium, phosphorus) and porosity assessment of cortical bone samples.

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Main Results:

  • Fast-growing strain exhibited significantly higher body weight.
  • Both strains showed similar bone formation and mineralization periods and bending resistance.
  • Fast-growing strain had less mineralized, more porous cortical bone with altered Ca:P ratios.

Conclusions:

  • Rapid growth in meat chickens may lead to compromised bone density and increased porosity.
  • Reduced bone quality in fast-growing strains could impact tibiotarsus breaking strength.
  • Potential causes include inadequate mineral supply, impaired utilization, or genetic factors.