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Revista Brasileira de Zoologia

Print version ISSN 0101-8175

Rev. Bras. Zool. vol.17 no.3 Curitiba Sept. 2000

http://dx.doi.org/10.1590/S0101-81752000000300019 

Estrutura fina do espermatozóide de Acestrorhynchus falcatus Bloch (Teleostei, Characidae) da região norte do Brasil1

 

Fine structure of the spermatozoon of the Acestrorhynchus falcatus Bloch (Teleostei, Characidae) of the northern region of Brazil

 

 

Edilson Matos*; Patricia MatosI; Laura CorralII; Carlos AzevedoII

IDepartamento de Histologia e Embriologia, Universidade Federal do Pará. 66059-900 Belém, Pará, Brasil
IIDepartamento de Biologia Celular, ICBAS, Universidade do Porto. 4050 Porto, Portugal

 

 


ABSTRACT

Spermatozoa of amazon fish, Acestrorhynchus falcatus Bloch, 1794 were investigated by optical microscopy (DIC) and electron microscopy (TEM). Spermatozoa have no acrosome, the head is ovoid, and the midpiece region cylindrical, contains spherical mitochondria. The centriolar complex is located at the lateral side of the nucleus, formed by nine peripheral pairs of microtubules and arranged in a right angle to each other. The flagellum consists of nine pairs of peripheral and two central microtubules.

Key words: Teleostei, Characidae, Acestrorhynchus falcatus, ultrastructure, spermatozoon


 

 

Texto completo disponível apenas em PDF.

Full text available only in PDF format.

 

 

AGRADECIMENTOS. Ao Sr. João Carvalheiro pelo serviço iconográfico. Ao Prof. Dr. Heraldo Britiski do Museu de Zoologia, USP, pela identificação da espécie.

 

REFERÊNCIAS BIBLIOGRÁFICAS

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Franzén, A. 1983. Ultrastructural studies of spermatozoa in three bivalve species with notes on evolution of elongated sperm nucleus in primitive spermatozoa. Gamete Res. 7:199-214.         [ Links ]

Grier, H.J. 1973. Aspects of germinal cyst and sperm development in Poecilia latipinna (Teleostei: Poeciliidae). Jour. Morphol. 146:229-250.         [ Links ]

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Jamieson, B.G.M. 1991. "Fish evolution and systematics: evidence from spermatozoa". Cambridge, Univ. Press, 319p.         [ Links ]

Koch, R.A. & C.C. Lambert. 1990. Ultrastructure of sperm, spermiogenesis, and sperm-egg interations in selected invertebrates and lower vertebrates which use external fertilization. Jour. Electron Microsc. Tech. 16:115-154.         [ Links ]

Lahnsteiner, F. & R.A. Patzner. 1990. Spermiogenesis and structure of mature spermatozoa in blenniid fishes (Pisces, Blenniidae). Jour. Submicrosc. CytoL Pathol. 22:565-576.         [ Links ]

______. 1995. Fine structure of spermatozoa of two marine teleost fishes, the red mullet, Mullus barbatus (Mullidae) and the white sea bream, Diplodus sargus (Sparidae). Jour. Submicrosc. Cytol. Pathol. 27:259-266.         [ Links ]

Matos, E.; P. Matos; E. Oliveira & C. Azevedo. 1993. Ultraestrutura do espermatozóide do pacu Metynnis maculatus Kner,1960 (Pisces, Teleostei) do rio Amazonas. Revta Bras. Ciên. Morfol., 10:7-10.         [ Links ]

Matos, E.; P. Matos; L. Corral & C. Azevedo. 1995. Ultrastructural study of the spermatozoon of Crenicichla saxatilis Linnaeus, 1758 (Pisces, Teleostei) from the Amazon River. Braz. Jour. Morphol. Sci., 12:109-114.         [ Links ]

Mattei, C. & X. Mattel 1974. Spermiogenesis and spermatozoa of the Elopomorpha (Teleostei fish), p. 211-221. In: B.A. Afzelius (Ed). The functional anatomy of the spermatozoa. Oxford, Pergamon Press, 342p.         [ Links ]

 

 

Recebido em 01.VII.1999; aceito em 25.VIII.2000.

 

 

* Correspondências para: Departamento de Biologia Animal, Faculdade de Ciências Agrárias do Pará. Avenida Tancredo Neves, 66077-530 Belém, Pará, Brasil.
1 Trabalho parcialmente subsidiado pela FCAP, UFPA e Fundação Engenheiro Antônio de Almeida (Portugal).

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