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Revista Brasileira de Zoologia

Print version ISSN 0101-8175

Rev. Bras. Zool. vol.10 no.4 Curitiba  1993

https://doi.org/10.1590/S0101-81751993000400007 

The ultrastructure of the mullet Mugil curema Valenciennes (Teleostei, Mugilidae) spermatozoa

 

 

Daura Regina Eiras-StofellaI; Waldemiro GremskiII; Sandra Maria KuligowskiIII

ICentro de Microscopia Eletrônica, Universidade Federal do Paraná, Caixa Postal 17003, 80051-970 Curitiba, Paraná, Brasil
IIDepartamento de Biologia Celular, Universidade Federal do Paraná, Caixa Postal 19031, 81531-970 Curitiba, Paraná, Brasil
IIIBolsista de Iniciação Cientifica do CNPq

 

 


ABSTRACT

The structure of the spermatozoon of Mugil curema Valenciennes, 1836 was studied using scanning and transmission electron microscopy. The spermatic head is rounded and formed by the nucleus containing granular chromatin, firmly packed resulting in a mass extremely electron dense. The acrossome is absent. The midpiece is characterized by the presence of two centrioles, a plasmatic canal, very few vesicles, and several mitochondria (9-10) with aproximately 0.50µm in diameter. The head and the midpiece are aproximately 1.56µm in diameter. The flagellum conforms to the 9 + 0 flagellar pattern near the transition region in its midpiece and is 9 + 2 from there on up to the distal region of the axoneme. The electron density in the A tubules 1, 2, 5 and 6 shows the asymetry of this spermatozoa. Its spermatic cell differs ultrastructuraly from those of other Mugilidae species mainly because it has the highest number of mitochondria.

Key words: Teleostei, Mugilidae,mullet, Mugil curema, ultrastructure, spermatozoa


 

 

Full text available only in PDF format.

Texto completo disponível apenas em PDF.

 

 

ACKNOWLEDGMENTS. To Vera Regina Fontana Pionteke (Electron Microscopy Centre, Federal University of Paraná) for her help with the photographic work in this paper and the National Research Council of Brazil (CNPq) by the partial financial support.

 

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Recebido em 04.V.1993; aceito em 25.II.1994.

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