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Some problems with the physiological concept of "stress".

J Rushen

    Australian Veterinary Journal
    |November 1, 1986
    PubMed
    Summary

    Stress in animals is complex. Elevated corticosteroids do not always indicate suffering and may reflect cognitive demands, urging caution in interpreting physiological data for animal welfare assessments.

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    Area of Science:

    • Veterinary Science
    • Animal Behavior
    • Physiology

    Background:

    • Stress is a key concept in animal welfare discussions, often linked to physiological markers.
    • The term 'stress' has broad connotations beyond specific physiological responses.

    Purpose of the Study:

    • To critically evaluate the use of physiological stress indicators in animal welfare.
    • To examine the relationship between corticosteroid levels and animal suffering.

    Main Methods:

    • Review of existing literature on stress physiology and animal welfare.
    • Analysis of the interpretation of plasma corticosteroid levels in animal studies.

    Main Results:

    • Increased plasma corticosteroids do not reliably indicate animal suffering or distress.
    • Corticosteroid rises may correlate with cognitive challenges and learning demands.

    Conclusions:

    • Veterinarians should exercise caution when using 'stress' and interpreting corticosteroid data in animal welfare contexts.
    • The physiological definition of stress is insufficient to capture the full scope of animal welfare concerns.

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