[Localization of cells connected with different tropic functions in the hypophysis of the young of Huso huso L. X Acipenser ruthenus L., Chondrostei].

A number of histological and histochemical methods were used in order to detect different secretory cells in the hypophysis of young Huso huso L. x Acipenser ruthenus L., Chondrostei. special attention was given to somatotropic cells. For their detection the following staining methods were used: orange G - acidic red 2C - acidic green G after fixation in the mixture of HgCl2 with formalin. In the dorsal part of the hypophysis having the appearance of vertical folds pressed into the hypophysis from the dorsal side, the cellular elements are represented mainly by somatotropic cells. In the dorso-nasal part the prolactin cells form the follicles. Part of prolactin cells lie between the follicles. Here there are some corticotropic cells. In the ventral part a considerable amount of basophils are found. The anatomic structure of the hypophysis is considered basing on the above data.