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Related Experiment Videos

Low temperature effects on embryonic development and hatch time

M E Suarez1, H R Wilson, B N McPherson

  • 1Programa de Ganaderia, Colegio de Postgraduados, Montecillo, Estado de Mexico, Mexico.

Poultry Science
|July 1, 1996
PubMed
Summary
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Cold stress during incubation negatively impacts chick weight and increases embryonic mortality. Intermittent cooling showed less detrimental effects than continuous cold exposure, highlighting the importance of incubation conditions for poultry development.

Area of Science:

  • Animal Science
  • Poultry Science
  • Embryology

Background:

  • Incubation conditions significantly influence embryonic development and post-hatch performance.
  • Understanding the impact of environmental stressors like cold is crucial for optimizing poultry production.

Purpose of the Study:

  • To assess phenotypic correlations between incubation traits.
  • To determine the effects of cold stress and genotype on incubation characteristics.
  • To evaluate impacts on chick weight, egg weight loss, hatching time, and embryonic mortality.

Main Methods:

  • Eggs were subjected to continuous or intermittent cold stress at various temperatures and durations during incubation.
  • Control groups were maintained under normal incubation conditions.

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  • Genotype-specific responses to cold stress were analyzed.

    • Main Results:

    • Cold stress reduced chick weight and increased embryonic mortality, especially with prolonged exposure (≥36 hours).
    • Continuous cold stress significantly increased mortality, while intermittent cooling had less impact.
    • Delayed hatching and increased dehydration susceptibility were observed in chicks from cooled eggs.
    • Significant genotype by environment interactions influenced embryo response to cold stress.

    Conclusions:

    • Cold stress during incubation adversely affects chick development and survival.
    • Intermittent cooling strategies may mitigate some negative effects of cold stress.
    • Embryonic susceptibility to dehydration and mortality is heightened by cold exposure, with genetic factors playing a role.