Features of the Formation of an Ovulatory Wave of Hypophysis Gonadotropins in High Fecundity Fish

Resumo

Study on the state of bighead carp Aristichthys nobilis females' central and peripheral of hypothesis gonadotropocytes at light and electron microscopy levels after stimulation of ripening a chorionic gonadotropin revealed that the amount of secretory material diminishes in both types of cells. Intensive excretion of both secretory granules and content of cisterns of the granular endoplasmic reticulum take place. Formation by the hypophysis of an ovulatory wave of the gonadotropin in the females with different fecundity differs due to the change in proportions of processes of mero- and holocrine secretion.