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KMID : 0381920100400010009
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Korean Journal of Microscopy
2010 Volume.40 No. 1 p.9 ~ p.14
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The Oogenesis of Coreoleuciscus splendidus, Cyprinidae, Teleostei
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Kim Dong-Heui
Lee Kyu-Jae
Teng Yung-Chien
Kim Wan-Jong
Kim Seok
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Abstract
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Coreoleuciscus splendidus is a teleost belonging to Gobioninae, Cyprinidae. The oogenesis was investigated by light microscope. The ovary was located between intestine and air bladder, a grayish and ellipsoidal shape with the major axis 20 mm and the minor axis 5 mm. Cytoplasm of oogonia was basophilic and many nucleoli were located at inside of nuclear membrane. In primary oocytes, yolk vesicles were distributed only in the marginal area and egg envelope was not formed on the outside of an egg. In secondary oocytes, the egg envelope was formed and yolk vesicles in the cytoplasm were increased than the earlier stage. The basophilic substance of cytoplasm was changed to acidic. In case of matured egg, thickness of egg envelope and size of egg were increased. The yolk vesicles were changed to yolk mass in accordance with development. In conclusion, the oogenesis of C. splendidus was characterized by the increase in cell size, the formation and accumulation of yolk, and the decrease of basophilic substance in the cytoplasm. The oogenesis of C. splendidus is similar with other Cyprinidae fishes. But further study on ultrastructural study of fertilized egg envelope will be necessary to get the species specificity.
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KEYWORD
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Coreoleuciscus splendidus, Oogenesis, Egg
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