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Stimulation lighting of meat-type pullets.

N A Cave

    Poultry Science
    |June 1, 1984
    PubMed
    Summary

    Stimulating meat-type pullets with rapid photoperiod increases (Treatment 1) advanced sexual maturity and increased egg production but reduced egg weight. The optimal lighting strategy depends on the specific hen strain’s egg and body weight traits.

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    Area of Science:

    • Animal Science
    • Poultry Science
    • Avian Biology

    Background:

    • Photoperiodic stimulation is crucial for regulating reproductive cycles in poultry.
    • Optimizing lighting programs can influence egg production efficiency and bird welfare.

    Purpose of the Study:

    • To compare the effects of two different photoperiodic stimulation lighting treatments on meat-type pullets.
    • To determine the impact of rapid versus slow light increases on reproductive performance and egg characteristics.

    Main Methods:

    • Two strains of meat-type pullets were housed in floor pens and subjected to two lighting treatments starting at 140 days of age.
    • Treatment 1 involved weekly 2-hour increases in photoperiod (totaling 10 hours over 5 weeks).
    • Treatment 2 involved initial 2- and 1-hour increases, followed by 14 weekly 0.5-hour increases.

    Main Results:

    • No significant difference in hatching eggs per hen housed between treatments.
    • Treatment 1 resulted in earlier 50% production (6.3 days sooner) and higher egg production (56.2% vs. 54.2%).
    • Treatment 1 led to lower egg weight (0.8 g less) and its benefits varied by strain, with rapid increases being advantageous for strains with higher egg size.

    Conclusions:

    • Rapid photoperiodic stimulation can advance sexual maturity and increase egg numbers in meat-type pullets.
    • The effectiveness of rapid versus slow lighting stimulation programs is strain-dependent, particularly concerning egg size and body weight management.
    • Strain-specific characteristics should guide the selection of photostimulation lighting strategies for optimal reproductive performance.

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