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Related Experiment Videos

Serum corticosterone concentrations in developing shell-less and shelled turkey embryos.

J McMurtry1, M Richards, D Brocht

  • 1Nonruminant Animal Nutrition Laboratory, U.S. Department of Agriculture-Agriculture Research Service, Beltsville, MD 20705.

Comparative Biochemistry and Physiology. A, Comparative Physiology
|January 1, 1991
PubMed
Summary

Shell-less turkey embryo culture (EO) shows reduced growth and increased mortality after day 14. Corticosterone levels in EO embryos do not increase normally, suggesting a potential cause for developmental issues.

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Area of Science:

  • Embryology
  • Endocrinology
  • Poultry Science

Background:

  • Shell-less culture is a method for incubating turkey embryos.
  • Previous studies indicate reduced growth and increased mortality in shell-less turkey embryos after day 14 of incubation.

Purpose of the Study:

  • To investigate serum corticosterone concentrations in turkey embryos undergoing shell-less culture compared to in ovo incubation.
  • To determine if altered corticosterone levels correlate with developmental abnormalities in shell-less turkey embryos.

Main Methods:

  • Serum corticosterone levels were measured in turkey embryos from both shell-less (EO) and in ovo (IO) cultures on specific incubation days.
  • Comparative analysis of corticosterone concentrations between the two incubation methods.

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Main Results:

  • On incubation days 14 and 16, corticosterone levels were significantly higher in EO embryos than in IO embryos.
  • In later incubation stages, corticosterone levels increased dramatically in IO embryos but remained relatively constant in EO embryos.
  • EO embryos did not exhibit a hormonal secretion pattern indicative of stress.

Conclusions:

  • The absence of a normal corticosterone increase in shell-less turkey embryos may be linked to abnormal embryological development observed in later incubation stages.
  • Shell-less culture conditions may not induce a typical stress response in turkey embryos, impacting their development.