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- Title
Morfometria e histologia das gônadas de machos e fêmeas recémeclodidos de Podocnemis expansa e Podocnemis unifilis (Testudines, Podocnemididae).
- Authors
Malvasio, Adriana; Nascimento-Rocha, Josefa Moreira Do; Santos, Helcileia Dias; De Ataides, Adson; Gonçalves Portelinha, Thiago Costa
- Abstract
Considering the importance of the histological sexing technique of turtles and the few works directed to this objective, it was proposed in this study to morphometrically and histologically characterize the gonads of P. unifilis and P. expansa. All specimens used in this work originated in the Javaés river, around the Araguaia National Park, Tocantins State, Brazil. Following a study under a stereoscope, the gonads were collected for the routine histological procedure. A total of 187 samples of P. expansa were analyzed, of which 81.2% were identified as female and 18.7% as male; as well as 98 P. unifilis samples, of which 31.6% were female and 68.4% males. No relevant microscopic differences were verified in the sexing between these species. The criteria used in the microscopically diagnosis were primarily gonad morphology, presence of the appendix in the remaining oviduct, oviduct morphology and the characteristics of covering cells of the follicles and somniferous tubules. When the measurements of the ovaries and testicles were compared, only differences in width were observed.
- Subjects
BRAZIL; PODOCNEMIS expansa; PODOCNEMIS unifilis; TURTLES; PLANT morphology
- Publication
Acta Scientiarum: Biological Sciences, 2012, Vol 34, Issue 1, p105
- ISSN
1679-9283
- Publication type
Article
- DOI
10.4025/actascibiolsci.v34i1.7257