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Ultrastructure of the Matured Egg Envelope in Pond Smelt, Osmeridae, Teleostei  

Kim, Dong-Heui (Department of Environmental Medical Biology, Wonju College of Medicine, Yonsei University)
Kim, Jae-Goo (Faculty of Biological science, College of Natural Sciences, Chonbuk National University)
Reu, Dong-Suck (Department of Life Science, Cheongju University)
Publication Information
Applied Microscopy / v.41, no.1, 2011 , pp. 13-20 More about this Journal
Abstract
The ultrastructure of the matured egg envelope in Pond smelt, Hypomesus nipponensis belonging to Osmeridae, Osmeriformes were investigated by routine light and electron microscopes. The matured egg have two egg envelopes and have a single micropyle, which is thought to the pathway of sperm in the area of the animal pole. An outer egg envelope was surrounded by a follicular layer and outer surface of inner egg envelope have structure with high electron density. Also, the inner egg envelope consisted of 6 horizontal lamellae with higher electron density alternating with 5 interlamellae of lower electron density. Many grooves distributed on the outer surface of outer egg envelope, and the outer surface of inner egg envelope was covered by amorphous structures. In conclusion, the egg of teleost is surrounded by one egg envelope according to the studies on morphology of egg envelope up to the present. The fact that have two egg envelopes is a species specificity of Pond smelt and these ultrastructural characters of egg envelope can be utilized in taxonomy of teleost.
Keywords
Ultrastructure; Fish; Egg envelope; Pond smelt; Hypomesus nipponensis;
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Times Cited By KSCI : 5  (Citation Analysis)
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