전자저널 > 전자저널 > Changes of Morphology and Morphometric Characteristics of the Oocyte during Oogenesis of the Abalone Haliotis discus hannai

Changes of Morphology and Morphometric Characteristics of the Oocyte during Oogenesis of the Abalone Haliotis discus hannai

Sun Mi Ju and Jung Sick Lee

Department of Aqualife Medicine, Chonnam National University, Yeosu 59626, Korea

The developmental stage of germ cells during oogenesis can be categorized into six stages with histological features: (1) oogonium, (2) previtellogenic oocyte, (3) initial vitellogenic oocyte, (4) early active vitellogenic oocyte, (5) late active vitellogenic oocyte and (6) ripe oocyte. The size of oocyte, nucleus and nucleolus illustrated the increase tendency but size ratio of nucleolus to nucleus was decreased during oogenesis. During oogenesis the stainability in the cytoplasm of oocyte changes from basophilic to eosinophilic in H-E stain. And egg stalk and outer jelly membrane was developed in the oocyte. These histological changes are seemed to be yolk accumulation in the oocyte and preparation process for spawning.

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