Fisheries and Aquatic Sciences

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Ultrastructure of Spermatozoa of the Light Bullhead Leiocassis nitidus (Teleostei, Siluriformes, Bagridae)

  • Kim, Kgu-Hwan (Department of Radiologic Technology, Daegu Health College) ;
  • Kwon, Ae-Sook (Department of Animal Pet manegement, Taegu Science College) ;
  • Lee, Byung-Chan (Daegu Technopark, Nano Practical Application Center)
  • Published : 2007.12.31
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Abstract

The spermatozoa of Leiocassis nitidus are relatively simple cells composed of a spherical head, a short midpiece, and a tail, as in most Siluriformes. The ultrastructure is characterized by the following features: Acrosome absent, as in most teleosts; around nucleus about $1.8\;{\mu}m$ long, with a deep nuclear fossa containing the proximal and distal centrioles and mitochondria. Two centrioles approximately $180^{\circ}$ from each other; 10 or more mitochondria surrounding the axoneme (with a 9+2 microtubular pattern), arranged in two layers in the postnuclear cytoplasm and separated from the axoneme by the cytoplasmic canal. Two lateral fins on the same plane as the two central microtubules; doublets 3 and 8, which are ultrastructural characteristics of the sperma tail unlike other siluroids laking the lateral fins.

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References

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