INFRADIAN RHYTHMS OF THE ESOPHAGEAL EPITHELIUM MITOTIC ACTIVITY AND CORTICOSTERONE AND THYROXIN LEVELS IN JAPANESE
QUAILS (COTURNIX JAPONICA)
Diatroptov M.E.
Scientific Research Institute of Human Morphology of RAMS, Moscow;
e-mail: diatrom@inbox.ru
An everyday investigation of the dynamics of the blood serum corticosterone and thyroxin levels, as well as the esophageal epithelium proliferation activity of male Japanese
quails has been conducted over the period of 16 days. A 4-day rhythm of the corticosterone serum level occurring synchronically in the bodies of different individuals was discovered.
A 3-day biorhythm of the thyroxin level was shown. The mitotic index figures in the esophageal epithelium negatively correlated with the corticosterone level. The revealed infradian
rhythms of the corticosterone and thyroxin levels as well as those of the esophageal epithelium mitotic index should not be overlooked while planning and carrying out the experiments
concerning the determination of the level of these hormones and the mitotic activity of epithelial tissues.
Key words: infradian rhythms, corticosterone, thyroxin, proliferation, epithelium, bird
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