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Related Experiment Videos

[Energy equilibrium during sleep in ruminants]

P L Toutain, A J Webster

    Comptes Rendus Hebdomadaires Des Seances De L'Academie Des Sciences. Serie D: Sciences Naturelles
    |November 24, 1975
    PubMed
    Summary

    Sheep and calves adjust their heat production and loss during sleep. Shorn animals and calves equally reduce heat exchange, while fleeced sheep experience a negative heat balance when sleeping.

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    Area of Science:

    • Animal Physiology
    • Thermoregulation
    • Metabolic Studies

    Context:

    • Understanding heat exchange is crucial for animal welfare and productivity.
    • Previous research has focused on thermoregulation in various environmental conditions.
    • The impact of sleep on energy balance in livestock requires further investigation.

    Purpose:

    • To quantify heat exchanges in calves and sheep before and after shearing.
    • To investigate the relationship between sleep and thermoregulatory responses in livestock.
    • To compare the metabolic and heat exchange patterns of fleeced sheep versus shorn sheep and calves during sleep.

    Summary:

    • Heat exchange measurements were conducted using a gradient-layer calorimeter and respiration chamber.
    • Fleeced sheep exhibited negative heat balance during sleep, suggesting heat loss exceeded production.
    • Calves and shorn sheep demonstrated a coordinated reduction in both heat production and heat loss during sleep, indicating metabolic and physiological adjustments.

    Impact:

    • Provides insights into the thermoregulatory strategies of livestock during sleep.
    • Highlights differences in metabolic responses to sleep based on fleece cover.
    • Informs management practices related to animal housing and welfare, particularly concerning energy balance in different physiological states.

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