| Full text | |
| Author(s): |
Paulo R.S. Santos
[1]
;
Moacir F. Oliveira
[2]
;
Alexandre R. Silva
[3]
;
Carolina Maria O.N. Camargo
[4]
;
Antônio C. Assis Neto
[5]
Total Authors: 5
|
| Affiliation: | [1] Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia. Setor Anatomia do Departamento de Cirurgia - Brasil
[2] Universidade Federal Rural do Semi Árido. Departamento de Ciências Animais - Brasil
[3] Universidade Federal Rural do Semi Árido. Departamento de Ciências Animais - Brasil
[4] Universidade Estadual Paulista Júlio de Mesquita Filho. Faculdade de Zootecnia - Brasil
[5] Universidade de São Paulo. Faculdade de Medicina Veterinária e Zootecnia. Setor Anatomia do Departamento de Cirurgia - Brasil
Total Affiliations: 5
|
| Document type: | Journal article |
| Source: | Pesquisa Veterinária Brasileira; v. 32, p. 84-90, 2012-12-00. |
| Abstract | |
The Spix's yellow-toothed cavy (Galea spixii) from the Brazilian northeastern semi-arid is a rodent that does belong to the family Caviidae. They are found in regions of the Caatinga and Cerrado, and reproduces throughout the year, with a gestation period of 48 days and a litter of 2 to 4 pups. The aim of this study was to characterize histologically the structural components of the genital organs of male Spix's yellow-toothed cavies regarding their chronological development. For the analysis we used animals at birth and with 15, 30, 45, 60, 75, 90, 105, 120 and 150 days of age. Fragments of the epididymis, vas deferens, penis and accessory sex glands were collected, fixed and processed for light microscopic. The epididymis had a simple columnar epithelium and at each sexual stage the epididymis was noted different in size of the tubular lumen and regarding the presence of sperm in the lumen at 45 days of age. The epithelium of vas deferens was found to be pseudo-stratified columnar with increasing presence of stereocilia with advancing age. The vesicular gland showed a folded mucosa that varied according to stage of sexual development. The prostate was not very developed, with a small lumen in Spix's yellow-toothed cavy at birth and at 15 days of age; at 45 days showed variable wrinkling of the epithelium. The male genital organs underwent morphological transformations in line with age and sexual development, what helped to determine the onset of puberty, which in the species studied occurred at 45 days of age. (AU) | |
| FAPESP's process: | 10/14516-0 - Ultrastructural study of the development of spermatogenesis and sperm airway in preá (Galea spixii; Wagler, 1831) bred in captivity |
| Grantee: | Paulo Ramos da Silva Santos |
| Support Opportunities: | Scholarships in Brazil - Master |