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KMID : 0381920090390030227
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Korean Journal of Microscopy
2009 Volume.39 No. 3 p.227 ~ p.236
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The Spermatogenesis of Coreoleuciscus splendidus, Cyprinidae, Teleostei
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Kim Dong-Heui
Lee Kyu-Jae
Teng Yung-Chien
Kim Seok
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Abstract
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The ultrastructure of spermatogenesis and sperm in Coreoleuciscus splendidus, belonging to Gobioninae, Cyprinidae
was investigated by light and electron microscopes. The testis was located between intestine and air bladder. The size of testis was major axis 1.8 cm, minor axis 3 mm. The testis of C. splendidus contained numerous testicular cysts, and spermatogenesis was non-synchronized in these testicular cysts. In May, the upper area of testis contained with other germ cells and sperm but the lower area of testis contained with matured sperm only. In case of spermatogonia, the nucleus was comparatively large spherical, and mitochondria showed a marked development. The size of primary spermatocyte was smaller than that of spermatogonia, and that of secondary spermatocyte was smaller than that of primary spermatocyte. The chromatin of spermatocyte was highly condensed according to their development. The nucleus with electron-dense was round shape. In spermiogenesis, flagella started to be formed and chromatin was more condensed. The mitochondria were rearranged in a middle piece. The head of matured sperm was a spherical shape and had not acrosome. The microtubules of flagella were arranged 9+2 structure. Also, the tail of sperm had not lateral fins and 7 outer coarse fibers.
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KEYWORD
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Spermatogenesis, Coreoleuciscus splendidus, Cyprinidae, Teleost
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