Ultrastructure of the chorion and its micropyle apparatus in the mature discus (symphysodon spp.) eggs

Döllenmiş diskus balık yumurtalarının yüzey yapısı elektron mikroskop ile incelendiğinde; oval, telolecital ve açık sarı renkteki yumurta kabuğunun (chorion) üzerinde kısa fîbriller bulunan jel benzeri bir katmanın yer aldığı görülmüştür. Baca şekilli mikrofil deliğinin tabana uzanan iç yüzeyinin, düzgün olduğu ve yumurta dış yüzeyinin fibril yığını ile kaplı olduğu görülmüştür.

Anahtar Kelimeler:

olgunluk, Discus, balık yumurtası, eşeylik organları, eşeysel gelişim, koryon, biyolojik gelişim

Olgun diskus (symphysodon spp.) yumurtalarında chorion ve mikrofil'in ultrastrüktürel yapısı

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:

maturity, Discus, fish eggs, gonads, sexual development, chorion, biological development,

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