MORPHO-FUNCTIONAL ANALYSIS OF THE STATE OF STEROID-PRODUCING CELLS
IN GORBUSCHA FRY GONADS (ONCORHYNHUS GORBUSCHA WALBAUM) IN NORMAL CONDITIONS AND AFTER ESTRADIOL TREATMENT
M. V. Mosyagina, I. V. Kuznetsova, O. V. Zelennikov, P. E. Garlov
Department of Ichthyology and Hydrobiology, St. Petersburg State University, and Institute of Cytology RAS,
St. Petersburg
Localization and peculiarities of steroid-producing cells of gorbuscha fry gonads were studied in normal
conditions and after experimental conditions. In females steroid-producing cells are found also in the follicle
tunica and between interstitial cells, greatly differing in ultrastructure in these two localities. In males, these
cells are located only in the testicular tunica, being homogeneous in ultrastructure. Chronical hormonal treatment
of the fry with oestradiol-dipropionate induced in males, contrary to females, a considerable increase in the
number and functional activity of steroid-producing cells and the appearance of these cells in the stroma of
testis also. In females only a mass appearence of lipid-like droplets in the cytoplasm of steroid-producing cells
is observed, which is also characteristic of males. The revealed morpho-functional peculiarities of
steroid-producing cells are discussed in terms of their presumed important role in regulation.
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