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Related Experiment Videos

Factors regulating bone maturity and strength in poultry.

N C Rath1, G R Huff, W E Huff

  • 1USDA Agricultural Research Service, Poultry Science Center, University of Arkansas, Fayetteville 72701, USA. nrath@comp.uark.edu

Poultry Science
|July 20, 2000
PubMed
Summary

Poultry bone problems are common, impacting welfare and economics. Understanding collagen crosslinks and mineralization is key to improving bone strength and maturity in growing birds.

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Area of Science:

  • Animal Science
  • Biochemistry
  • Veterinary Medicine

Background:

  • Adolescent poultry, including meat-type and cage layers, frequently suffer from bone issues like weakness, deformities, and fractures, leading to economic losses and welfare concerns.
  • Bone quality and strength are determined by a complex interplay of structural, architectural, compositional, physiological, and nutritional factors.

Purpose of the Study:

  • To elucidate the physiological basis of bone maturity and strength in poultry.
  • To understand how various factors, including collagen crosslinking and mineralization, influence bone quality.

Main Methods:

  • Review of existing literature on poultry bone physiology and pathology.
  • Analysis of studies examining bone composition, collagen crosslinks (hydroxylysylpridinoline [HP] and lysylpyridinoline [LP]), and mineralization during growth.

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  • Investigation of factors affecting bone strength, such as age, corticosteroid exposure, and growth rate.

    • Main Results:

    • Tibia growth and collagen crosslink content (HP and LP) increased until 25 weeks of age.
    • Younger birds (5 weeks) had strong but brittle tibias due to low collagen crosslinks and high mineral content.
    • Bone density and ash content increased moderately with age, less so than crosslink content.

    Conclusions:

    • Bone maturity in poultry is closely related to collagen crosslink content.
    • Factors compromising bone strength include reduced growth, altered shape, impaired mineralization, and reduced collagen crosslinking.
    • Addressing these factors is crucial for improving poultry bone health and welfare.