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A Study on the Oogeneis of False Dace (Pseudorasbora parva)  

Kim, Dong-Heui (Department of Basic Science, Wonju College of Medicine, Yonsei University)
Lee, Kyu-Jae (Department of Parasitology, Wonju College of Medicine, Yonsei University)
Kim, Seok (Electron Microscope Facility Wonju College of Medicine, Yonsei University)
Deung, Young-Kun (Department of Basic Science, Wonju College of Medicine, Yonsei University)
Publication Information
Applied Microscopy / v.37, no.2, 2007 , pp. 65-72 More about this Journal
Abstract
The oogenesis and ultrastructure of fertilized egg envelope of false dace were investigated by light and electron microscope. The cytoplasm of false dace oogonia was basophilic and many nucleoli were located at inner side of nuclear membrane. In primary oocytes, yolk vesicles were distributed in marginal area only and egg envelope was not formed on egg outside. In secondary oocyte, the egg envelope was formed and yolk vesicles were increased than that of early stage in cytoplasm. The amount of basophilic substance was decreased. In case of matured egg, thickness of egg envelope and site of egg were increased, basophilic substance was distributed in egg envelope around only. The yolk vesicles were changed to yolk mass in accordance with development. The fertilized egg was of ellipsoidal, adhesive type and yellowish, have a single micropyle in the area of the animal pole. The fertilized egg envelope consisted of three layers, an outer adhesive layer, a middle layer consisting of 6 lamellae alternating layers and an inner electron dense layer. An outer surface of the fertilized egg envelope was arranged by adhesive fibrous structures. In conclusion, it is summarized that the oogenesis of false dace were the increase of cell size, the formation and accumulation of yolk, and decrease of basophilic intensity in cytoplasm. These ultrastructural characteristics of fertilized egg envelope from false dace can be utilized in taxonomy of teleost.
Keywords
Oogenesis; False dace; Fertilized egg envelope; Fish;
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Times Cited By KSCI : 6  (Citation Analysis)
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