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http://dx.doi.org/10.35399/ISK.31.4.4

Fine Structure of Spermatozoa of Venus Fish, Aphyocypris chinensis (Pisces: Cyprinidae) from Korea  

Kim, Kgu-Hwan (Department of Radiologic Technology, Daegu Health Colleage)
Ahn, Sung-Ju (Department of Clinical Pathology, Daegu Health Colleage)
Publication Information
Korean Journal of Ichthyology / v.31, no.4, 2019 , pp. 208-213 More about this Journal
Abstract
Spermatozoa of Aphyocypris chinensis was studied by transmission electron microscopy. The investiation revaled that, spermatozoa display a round head, a small midpiece and a long tail region. In the spermatozoa, the nucleus contains highly condensed homogeneous chromation with small electron lucent areas. The base of the nucleus is slightly invaginated laterally by the nuclear fossa which contains the proximal centriole. The two centrioles orientated at an obtus angle (130°) to each other. The midpiece encircles the flagellum and is completely separated from it by the cytoplasmic channel. The midpiece contains more than 12 mitochondria. The mitochondria are arranged in 4~5 layer and are asymmetrically distributed in the postnuclear cytoplasm. The mitochondria surround the proximal part of the flagellum. The flagellum has classical 9+2 axoneme and no lateral fins. The spermatozoa of A. chinensis are similar to those of other cyprinids having a spherical head with a shallow nuclear fossa, a short midpiece including the asymmetrical arrangement of mitochondria and the lateral insertion of flagellum. However, there are some differences in the orientation of centrioles and the number of the mitochondria.
Keywords
Spermatozoa; ultrastructure; Cyprinidae; Aphyocypris chinensis;
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