Korean Journal of Fisheries and Aquatic Sciences (한국수산과학회지)

The Korean Society of Fisheries and Aquatic Science (한국수산과학회)
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Ultrastructure of Spermatozoa of the Slender Catfish, Pseudobagrus brevicorpus (Teleostei, Bagridae) with Phylogenetic Considerations

꼬치동자개 (Pseudobagrus brevicorpus) 정자의 미세구조와 계통적 고찰(경골어류, 메기목, 동자개과)

  • KIM Kgu Hwan (Department of Radiologic Technology, Daegu Health College) ;
  • LEE Joon Il (Department of Radiologic Technology, Daegu Health College)
  • 김구환 (대구보건대학 방사선과) ;
  • 이준일 (대구보건대학 방사선과)
  • Published : 2003.10.01
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Abstract

Morphology of the spermatozoa from the testes of the catfish (Pseudobagrus brevicorpus) was studied by transmission and scanning electron microscopy. The spermatozoa of P. brevicorpus are approximately $82.25\pm0.06\;{\mu}m$ in length and relatively simple cells composed of a spherical head, a short midpiece and a tail as in most teleost fish, The nucleus measuring about $2.00\pm0.02\;{\mu}m$ in length is depressed with a deep nuclear fossa of about $1.05\pm0.03\;{\mu}m$ in length three fifths of the nuclear length. The nuclear fossa contains the proximal and distal centrioles. The two centrioles are oriented approximately $150^{\circ}$ to each other. The mitochondria are arranged in two layers and their number is 12 or more. They are separated from the axoneme by the cytoplasmic canal. The axoneme is the 9+2 microtubular pattern and has inner but no outer dynein arms as in other bagrids. The axonemal fins were the closed to axonemal doublet 3 and 8. The axonemal fins and lost outer dynein arm are shared in Bagridae and the deep nuclear fossa is shared in Siluriformes. The axonemal fins observed in Bagridae and Amblycipitidae of Siluriformes might be the apomorphic character in Ostariophysi.

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References

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