Abstract

Two patterns of resorption of vitellogenous oocytes with the participation of follicular cells, differing in their morphological features, were revealed in the striped flounder Pleuronectes pinnifasciatus. In the prespawning season, the resorption affected a small number of oocytes with yolk granules and resembled in some features (destruction of the nucleus and radial coating) the atresia of ovarian follicles in many fish species previously studied. In the spawning season, resorption was specified by accretion of the follicular epithelium and release of the homogenized yolk from the oocytes to the follicular wall. No destruction of the radial coating was observed in that case, and the trophic material was utilized in protrusions of the follicular wall.

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