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Related Experiment Videos

Stress and nutritional quality of broilers.

J D Tankson1, Y Vizzier-Thaxton, J P Thaxton

  • 1Department of Poultry Science, Mississippi State University, Mississippi 39762, USA.

Poultry Science
|September 18, 2001
PubMed
Summary
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Adrenocorticotropin (ACTH) and heat stress in broiler chicks significantly reduce body weight, carcass weight, and muscle quality. These stress-induced losses in meat yield and quality were comparable to those seen in pale, soft, exudative (PSE) muscle conditions.

Area of Science:

  • Animal Science
  • Poultry Science
  • Meat Science

Background:

  • Environmental stressors and hormonal treatments can impact broiler performance and meat quality.
  • Understanding the effects of adrenocorticotropin (ACTH) and heat stress is crucial for optimizing poultry production.
  • Previous research indicates potential negative impacts on carcass yield and meat characteristics.

Purpose of the Study:

  • To investigate the individual and combined effects of ACTH administration and heat stress on broiler chick growth and meat quality.
  • To compare the impact of hormonal stress (ACTH) versus environmental stress (heat) on broiler meat characteristics.
  • To assess the reversibility of stress-induced changes in broiler meat quality after a recovery period.

Main Methods:

  • Broiler chicks were subjected to controlled environmental conditions, including a heat treatment simulating a Mississippi August day.

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  • Chicks received osmotic pumps delivering either ACTH (8 IU/kg BW/d for 7 d) or a placebo.
  • Body weight, carcass weight, carcass protein, muscle calories, moisture, fat, and ash content were measured.

    • Main Results:

    • Both ACTH and heat treatments significantly reduced body weight, carcass weight, carcass protein, and muscle calorie content.
    • ACTH treatment, but not heat treatment, decreased carcass moisture.
    • Carcass fat and ash content remained unaffected by either treatment. Most observed changes persisted after a 1-week recovery period.

    Conclusions:

    • Both hormonal (ACTH) and environmental (heat) stress negatively impact broiler meat yield and quality.
    • The detrimental effects on meat quality are comparable to those observed in pale, soft, exudative (PSE) muscle conditions.
    • Stress management in broiler production is essential to mitigate significant economic losses.