Detection of the critical period of pituitary-adrenal system development during postembryonic chicken ontogenesis

Studies have been made on postembryonic development of the hypophyseal-adrenal system in domestic hens. Most significant functional rearrangements were observed at the 3rd week of life, when corticosteroid content of the blood plasma decreased threefold. Birds subjected to a series of cold stresses...

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Bibliographic Details
Published inŽurnal ėvolûtsionnoj biohimii i fiziologii Vol. 14; no. 5; p. 441
Main Authors Avrutina, A Ia, Kisliuk, S M
Format Journal Article
LanguageRussian
Published Russia (Federation) 01.09.1978
Subjects
Adrenal Cortex Hormones - blood
Adrenocorticotropic Hormone - pharmacology
Age Factors
Animals
Chickens - growth & development
Cold Temperature
Eosinophils
Female
Leukocyte Count
Male
Pituitary-Adrenal System - growth & development
Stress, Physiological - physiopathology
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Summary:Studies have been made on postembryonic development of the hypophyseal-adrenal system in domestic hens. Most significant functional rearrangements were observed at the 3rd week of life, when corticosteroid content of the blood plasma decreased threefold. Birds subjected to a series of cold stresses at this time, exhibited more rapid sexual maturation, more rapid reaction of the adrenals to exogenous corticotropin and higher resistance to unfavourable factors. Stress expositions in other days of the first month of life also resulted in trace phenomena, although these were less evident. It is suggested that the 3rd week after hatching is a critical period in the development of ihe hypophyseal-adrenal system in hens.
ISSN:0044-4529