Serum corticosterone levels in embryos, newly hatched, and young turkey poults

The objectives of these experiments were to determine the concentration of corticosterone, the principal adrenocortical steroid in avian species, in serum of turkey embryos (12 to 28 days of development), newly hatched turkey poults (pipped and up to 6 hr posthatch), and poults between 1 and 15 days...

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Bibliographic Details
Published in:Poultry science 1985-11, Vol.64 (11), p.2195-2201
Main Authors: Wentworth, B.C, Hussein, M.O
Format: Article
Language:English
Subjects:
ANIMALES JOVENES
Animals
Animals, Newborn - blood
BLOOD COMPOSITION
COMPOSICION DE LA SANGRE
COMPOSITION DU SANG
Corticosterone - blood
DINDON
ECLOSABILIDAD DEL HUEVO
ECLOSABILITE
EGG HATCHABILITY
EMBRION
EMBRYO
Embryo, Nonmammalian - physiology
EMBRYON
Female
GLUCOCORTICOIDE
GLUCOCORTICOIDES
GLUCOCORTICOIDS
JEUNE ANIMAL
Male
PAVO
TURKEYS
Turkeys - blood
YOUNG ANIMALS
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Summary:The objectives of these experiments were to determine the concentration of corticosterone, the principal adrenocortical steroid in avian species, in serum of turkey embryos (12 to 28 days of development), newly hatched turkey poults (pipped and up to 6 hr posthatch), and poults between 1 and 15 days of age. The effect of giving exogenous doses of corticosterone at a physiological concentration on hatching was also determined. A significant (P less than .01) increase in serum corticosterone from .69 to 1.26 ng/ml occurred in the embryos between 17 and 18 days of development; a second significant increase to 4 ng/ml was just prior to hatching. A decrease in serum corticosterone concentration was noted during hatching and for the first 6 hr after hatching. Concentrations of corticosterone in serum fluctuated as posthatch corticosterone secretion became established between 1 and 15 days posthatch. Treatment of embryos 2 days prior to hatching with exogenous doses of corticosterone (540 ng/embryo) suggested a trend toward shorter mean incubation time and significantly increased hatchability.
ISSN:0032-5791
1525-3171
DOI:10.3382/ps.0642195