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Related Experiment Videos

Ambient temperature effects on energetic relations in growing chicks.

H Hayne, C Rovee-Collier, D Gargano

    Physiology & Behavior
    |January 1, 1986
    PubMed
    Summary

    Chicks exposed to cooler nocturnal temperatures ate more, selected carbohydrate-rich diets, and grew faster, demonstrating adaptive strategies for energy balance in domestic fowl.

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    Area of Science:

    • Animal Physiology
    • Avian Biology
    • Nutritional Ecology

    Background:

    • Ambient temperature significantly influences avian physiology and behavior.
    • Understanding these effects is crucial for optimizing poultry production and welfare.
    • Domestic chicks' responses to temperature variations inform broader principles of energy metabolism.

    Purpose of the Study:

    • To investigate the impact of different ambient temperature cycles on immature domestic chicks.
    • To assess effects on diet selection, intake, growth, body temperature, and activity.
    • To elucidate the adaptive strategies chicks employ in response to thermal challenges.

    Main Methods:

    • Two experiments were conducted using immature domestic chicks under controlled ambient temperature conditions.
    • Experiment 1: Warm vs. warm-light/cold-dark photoperiods.
    • Experiment 2: Cool vs. cool-light/warm-dark photoperiods; diet selection, intake, growth, body temperature, and activity were measured.

    Main Results:

    • Chicks in cooler nocturnal conditions exhibited lower body temperatures, increased feed intake, and higher carbohydrate diet selection.
    • These chicks also showed faster growth rates but reduced feed efficiency compared to controls.
    • Continuous cold rearing led to lower body temperatures and faster growth, with both groups displaying reduced activity.

    Conclusions:

    • Chickens' physiological and behavioral responses (body temperature, diet, intake, activity) are dynamic adaptations to ambient temperature.
    • These responses reflect a strategy to balance energy requirements, maximizing energy intake and minimizing expenditure.
    • Environmental temperature is a key factor influencing energy metabolism and growth efficiency in domestic chicks.

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