Ultrastructure of the Chorion and its Micropyle Apparatus in the Mature Discus

(Symphysodon spp.) Eggs

Olgun Diskus (Symphysodon spp.) Yumurtalarında Chorion ve Mikrofil’in Ultrastrüktürel Yapısı

Esra Savaş and Metin Timur

Istanbul University, Faculty of Aquatic Products, Laleli 34470 Istanbul,Turkey

Abstract          

The surface ultrastructure of discus (Symphysodon spp.) eggs was investigated by a scanning electron microscopy technique. The telolecital, oval and pale yellow colored mature discus eggs were possessed a micropyle and consisted of relatively smooth-sided, funnel-shaped vestibule at the bottom. The outer surface of the eggs were covered with pile of short fibrils. 

Keywords: Ultrastructure, Chorion, Micropyle, Symphysodon spp.