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Stocking density and physiological adaptive responses of broilers.

J P Thaxton1, W A Dozier, S L Branton

  • 1Department of Poultry Science, Mississippi State University, Mississippi State 39762, USA. pthaxton@poultry.msstate.edu

Poultry Science
|May 6, 2006
PubMed
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High stocking density in broiler production did not significantly impact physiological stress indicators. This study found no evidence of stress responses in broilers under varying commercial conditions.

Area of Science:

  • Animal Science
  • Poultry Science
  • Physiology

Background:

  • Stocking density is a critical management factor in broiler production.
  • Understanding the physiological impact of stocking density is essential for animal welfare and productivity.
  • Previous research has yielded varied results regarding stress responses in broilers at higher densities.

Purpose of the Study:

  • To investigate the effects of different stocking densities on the physiological adaptive responses of male broilers.
  • To determine if increased stocking density induces stress in broilers based on established physiological indicators.

Main Methods:

  • Three trials involving male broilers reared under commercial-like conditions.
  • Measurement of plasma corticosterone, glucose, cholesterol, and total nitrites (nitric oxide indicator) on day 49.

Related Experiment Videos

  • Assessment of the heterophil:lymphocyte ratio as a stress indicator.
  • Application of linear trend analyses to evaluate stocking density effects.

    • Main Results:

    • No significant physiological adaptive changes indicative of stress were observed across the tested stocking densities.
    • Plasma concentrations of corticosterone, glucose, cholesterol, and total nitrites remained unaffected.
    • The heterophil:lymphocyte ratio did not show significant alterations related to stocking density.

    Conclusions:

    • Commercial broiler stocking densities, within the tested range, do not appear to induce significant physiological stress.
    • Current management practices regarding stocking density may be within acceptable physiological limits for broilers.
    • Further research could explore long-term effects or different stress indicators.