Ultrastructural features and differentiation of the spermatids in Brycon orbignyanus during the spermiogenesis

Authors

  • Eduardo Duarte Aires Universidade de Marília, Faculdade de Ciências da Saúde, Marília, SP
  • Maíra Aparecida Stefanini Universidade Estadual Paulista, Faculdade de Medicina Veterinária e Zootecnia, Departamento de Anatomia, Botucatu, SP
  • Antonio Marcos Orsi Universidade Federal de São Carlos, Departamento de Morfologia e Patologia, São Carlos, SP

DOI:

https://doi.org/10.1590/S1413-95962000000300002

Keywords:

Brycon orbignyanus, Ultrastructure, Spermatids

Abstract

Spermiogenesis in Brycon orbignyanus may be divided in four stages, which consist mainly in reduction of cytoplasmic, nuclear and cellular volumes and compactation of the nuclear chromatin, whose stages of the process occur simultaneously. At the end of the spermiogenesis, when the spermatids reach high levels of differentiation, the nuclei become more compact and cytoplasms become reduced. These modifications result in the formation of new highly differentiated cells, the spermatozoa. Spermatozoa may be observed predominantly in cysts, like spermatids, or inside the lumen of the seminiferous tubules. Ultrastructurally, three different parts have been clearly identified in Brycon orbignyanus spermatozoon: head, middle-piece and flagellum.

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Published

2000-01-01

How to Cite

Aires, E. D., Stefanini, M. A., & Orsi, A. M. (2000). Ultrastructural features and differentiation of the spermatids in Brycon orbignyanus during the spermiogenesis. Brazilian Journal of Veterinary Research and Animal Science, 37(3), 183-188. https://doi.org/10.1590/S1413-95962000000300002

Issue

Section

BASIC SCIENCES