Testicular structure and spermatogenesis of Amazonian freshwater cururu stingray Potamotrygon cf. histrix
Contribuinte(s) |
Universidade Estadual Paulista (UNESP) |
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Data(s) |
20/05/2014
20/05/2014
01/08/2011
|
Resumo |
The cururu stingray Potamotrygon cf. histrix, a new and endemic Amazonian freshwater species, presents appropriate characteristics for fish keeping and is exploited from its natural environment. The present study identified the testicular structure and spermatogenesis of this species. Gonads from adult male specimens were dissected, fixed and processed for histological analysis. The testes were of testicular/epigonial type. The presence of germinal papillae was observed in the upper portion of organ with primordial germ cells and Sertoli cell precursors. The testis was lobular with zonal organization and cystic gametogenesis, with the occurrence of spermatoblasts. The Sertoli cells underwent morphological modifications over the course of gamete formation. The spermatozoids had long heads and were spiraled on their own axis. Information on the reproductive biology will serve as basis for studies on the reproduction and phylogeny of this peculiar group of cartilaginous fish. |
Formato |
245-253 |
Identificador |
http://dx.doi.org/10.1017/S0967199410000298 Zygote. New York: Cambridge Univ Press, v. 19, n. 3, p. 245-253, 2011. 0967-1994 http://hdl.handle.net/11449/2822 10.1017/S0967199410000298 WOS:000292281400007 WOS000292281400007.pdf |
Idioma(s) |
eng |
Publicador |
Cambridge University Press |
Relação |
Zygote |
Direitos |
closedAccess |
Palavras-Chave | #Epigonial testes #Germinal papilla #Intratesticular duct #Sertoli cell #Spermatoblast |
Tipo |
info:eu-repo/semantics/article |