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Ultrastructure of the Fertilized Egg Envelope in Cichlasoma managuensis, Cichlidae, Teleost  

Kim, Dong-Heui (Department of Environmental Medical Biology, Wonju College of Medicine, Yonsei University)
Chang, Byung-Soo (Department of Cosmetology, Hanseo University)
Teng, Yung-Chien (Department of Environmental Medical Biology, Wonju College of Medicine, Yonsei University)
Kim, Seok (Central Research Laboratory, Wonju College of Medicine, Yonsei University)
Joo, Kyung-Bok (Department of Ophthalmic Optics, Chodang University)
Lee, Kyu-Jae (Department of Environmental Medical Biology, Wonju College of Medicine, Yonsei University)
Publication Information
Applied Microscopy / v.39, no.1, 2009 , pp. 9-15 More about this Journal
Abstract
The ultrastructure of the fertilized egg envelope in Cichlasoma managuensis belonging to Cichlidae were investigated by routine light and electron microscopes. The fertilized eggs of Cichlasoma managuensis was of the light yellow, non-transparent, ellipsoidal, adhesive and nonfloted type. The size of fertilized egg was the major axis $1.92{\pm}0.08\;mm$, the minor axis $1.43{\pm}0.04\;mm$. The egg envelopes have a single micropyle, which is thought to the pathway of sperm in the area of the animal pole. An outer surface of fertilized egg envelope was covered by a adhesive reticular structures and the fertilized egg envelopes consisted of two distinct layers; an outer adhesive layer and an inner layer of $13{\sim}15$ horizontal lower electron density lamellae alternating with interlamellae of higher electron density. The external shape of fertilized egg is common trait of fishes belonging to Cichlidae and these ultrastructural characters of fertilized egg envelope can be utilized in taxonomy of teleost.
Keywords
Ultrastructure; Fish; Cichlidae; Egg envelope; Fertilized egg;
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Times Cited By KSCI : 3  (Citation Analysis)
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