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Related Experiment Videos

Embryonic ethanol exposure impairs detour learning in chicks.

L W Means1, K McDaniel, S N Pennington

  • 1Psychology Department, East Carolina University, Greenville, NC.

Alcohol (Fayetteville, N.Y.)
|July 1, 1989
PubMed
Summary

Ethanol injection during incubation significantly reduced hatching success and delayed pipping in chicks. Post-hatch, ethanol-exposed chicks showed impaired learning abilities, indicating developmental toxicity.

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Area of Science:

  • Embryology
  • Developmental Toxicology
  • Animal Behavior

Background:

  • Ethanol exposure during embryonic development can impact offspring health.
  • Understanding the effects of ethanol on avian development is crucial for poultry science.

Purpose of the Study:

  • To investigate the impact of ethanol injection at different incubation stages on chick hatching and post-hatch learning.
  • To assess the developmental toxicity of ethanol in embryonic poultry.

Main Methods:

  • Fertile eggs were injected with sterile water or 37.5% ethanol at pre-incubation, day 7, or day 14.
  • Hatching success and pipping times were recorded.
  • A detour learning task was administered to hatched chicks.

Main Results:

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  • Ethanol injection, regardless of timing, decreased hatching success.
  • Early ethanol exposure (pre-incubation) significantly delayed pipping.
  • All ethanol-exposed groups exhibited impaired learning, requiring more trials to reach criterion.

Conclusions:

  • Ethanol exposure during incubation negatively affects avian embryonic development and hatching.
  • Ethanol can cause lasting neurodevelopmental deficits, impairing learning in post-hatch chicks.
  • Timing of ethanol exposure influences specific developmental outcomes like pipping delay.