An Annual Cycle in the Interrenal Tissue of the Adrenal Gland of the White-Crowned Sparrow, Zonotrichia-Leucophrys-Gambelii.

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[edit] Author(s)

  • Lorenzen, L. C.
  • Farner, D. S.

[edit] Journal

General and Comparative Endocrinology 4.3 (1964): 253-63.

[edit] Keywords

[edit] Abstract

On the basis of microanatomic and cytologic observations, there appears to be a distinct annual cycle in the interrenal cortical tissue of the adrenal gland of a migratory subspecies of the white-crowned sparrow, Zonotrichiu leucophrys gambelii. Variations in the relative fractional volume of cortical tissue (FCV) in the entire gland and the relative density of sudanophilic material (SI) in the cortical cells correlate with conspicuous annual changes in the microanatomy of the gland. FCV and SI are highest in winter and spring, and lowest in the summer when the cortical cells of the interior of the gland become pycnotic with irregular nuclei, blood sinuses become more conspicuous, and the histologic organization is extensively altered.

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