Annual histophysiological changes in the adrenal cortex of free‐living blossomheaded parakeets were studied in relation to the gametokinetic activities in the testes and periodic climatic variables to evaluate possible interrelationship, if any, between these endogenous and exogenous cyclic factors. Observations involving histometry, karyometry and lipid cytochemistry of adrenal cortex along with quantitative estimation of tissue cholesterol demonstrate the annual rhythmic pattern in the activity of adrenocortical tissue with an annual peak in February followed by regressive changes till August. Steady progressive changes towards annual peak occur only after November. Results show that the seasonality of the histophysiological features in the adrenal cortex coincides better with the periodic sexual activities of the bird than with any of the surrounding environmental factors.

Responsiveness of the adrenal cortex to testosterone propionate in relation to the sexual status of the male blossom-headed parakeet.

Citations

Histophysiological changes in the adrenal cortex of male blossomheaded parakeet in relation to the annual testicular and environmental cycles

Influences of Length of Photoperiod on the Adrenocortical Activity of the Male Blossomheaded Parakeet Psittacula cyanocephala

Related Papers (5)

Sexual behavior of male pigs

The effect of testosterone or oestradiol upon the sexual and associated behaviour of the adult female Rhesus monkey.

Changes in the secondary sexual adornments of male mandrills (Mandrillus sphinx) are associated with gain and loss of alpha status.

Relations between sex hormone levels and sexual behavior in men.

Prenatal and neonatal testosterone exposure interact to affect differentiation of sexual behavior and partner preference in female ferrets.