• 제목/요약/키워드: Teleostei

검색결과 110건 처리시간 0.027초

참갈겨니(Teleostei, Cypriniformes, Cyprinidae) 정자변형과 정자의 미세구조 (Ultrastructure of Zacco koreanus (Teleostei, Cypriniformes, Cyprinidae) Spermiogenesis and Spermatozoa)

  • 김구환
    • 한국어류학회지
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    • 제18권4호
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    • pp.347-354
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    • 2006

  • 참갈겨니(Zacco koreanus) 정세포 변형과정과 성숙한 정자의 미세구조를 주사 및 투과 전자 현미경으로 관찰하였다. 참갈겨니 Z. koreanus 정세포변형과정은 수중형 Type II과 유사하나 기부중심립이 핵와안에 위치해 있는 점에서 일부 차이가 있었다. 또한 두 중심립은 섬유성 물질에 의하여 상호연결되어 있는데 이와 같은 구조는 잉어류에서 공통적으로 나타나고 있다. 편모에서 관찰되는 vesicle은 잉어류의 공통된 형질로 사료되며 Charciformes와 일부 Siluriformes에서도 관찰되고 있어 이들 분류군의 계통적 유연관계를 추정할 수 있는 구조적 특징으로 사료된다.

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모래무지(Teleostei, Cyprinidae) 정자변형과정과 정자의 미세구조 (Ultrastructure of Pseudogobio esocinus (Teleostei, Cyprinidae) Spermiogenesis and Spermatozoa)

  • 김구환;권덕문;이준일;정성배
    • 한국수산과학회지
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    • 제40권3호
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    • pp.147-152
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    • 2007

  • Spermiogenesis and mature spermatozoa of the Korean false minnow Pseudogobio esocinus (Cyprinidae) are described by means of scanning and transmission electron microscopy. Spermiogenesis is characterized by lateral development of the flagellum, absence of nuclear rotation, and eccentric nuclear fossa formation. The spermatozoa have a spherical head containing a nucleus with highly condensed chromatin and no acrosome. The nuclear fossa contains the proximal centriole and anterior part of the distal centriole. The midpiece is type A II and contains semi-fused mitochondria around the axoneme. However, the symmetrical distribution of 4 or more the mitochondria does not follow a general pattern of the cyprinid spermatozoa. Cytoplasmic vesicles in the midpiece are common in Cypriniformes and some of Siluriformes and Characiformes spermatozoa.

  • https://doi.org/10.5657/kfas.2007.40.3.147 인용 PDF KSCI

꼬치동자개 (Pseudobagrus brevicorpus) 정자의 미세구조와 계통적 고찰(경골어류, 메기목, 동자개과) (Ultrastructure of Spermatozoa of the Slender Catfish, Pseudobagrus brevicorpus (Teleostei, Bagridae) with Phylogenetic Considerations)

  • 김구환;이준일
    • 한국수산과학회지
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    • 제36권5호
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    • pp.480-485
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    • 2003

  • 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.

  • https://doi.org/10.5657/kfas.2003.36.5.480 인용 PDF KSCI