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KMID : 0381920100400040253
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Korean Journal of Microscopy
2010 Volume.40 No. 4 p.253 ~ p.259
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Ultrastructure of the Sperm in Testes of the Pond Smelt (Hypomesus nipponensis)
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Kim Jae-Goo
Park No-Kwan
Reu Dong-Suck
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Abstract
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The ultrastructure of sperms in testes of the pond smelt (Hypomesus nipponensis) was investigated using electron microscopes. The whitish testis was located between swim bladder and intestine. Especially, the left testis was larger than the right testis. The sperm was approximately 26 μm in length. The sperm had an oval head and the acrosome was not found. The nucleus was about 400 nm in diameter and chromatin was incompletely condensed. The nuclear fossa deeply formed in sperm head and two centrioles were located in the fossa. The mitochondrium was observed only one in midpiece of the sperm and a motile flagellum consisted of an axoneme with a typical 9+2 pattern of microtubule. Also, the tail of the sperm has axonemal fins.
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KEYWORD
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Hypomesus nipponensis, Ultrastructure, Sperm, Flagellum, Axonemal fins
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