期刊
REPRODUCTION FERTILITY AND DEVELOPMENT
卷 25, 期 3, 页码 547-557出版社
CSIRO PUBLISHING
DOI: 10.1071/RD12127
关键词
germ cells; reproduction; seminiferous epithelium; Sertoli cells
资金
- Regione Lombardia, Alma Mater Ticinensis, University of Pavia
- Agencia Nacional de Promocion Cientifica y Tecnologica, Argentina [PICT 1198]
- Consejo Nacional de Investigaciones Cientificas y Tecnicas, Argentina [(PIP 0204)]
Very little is known about the distinct reproductive biology of armadillos. Very few studies have investigated armadillo spermatogenesis, with data available only for Euphractus sexcinctus and Dasypus novemcinctus. In the present study, we analysed male germ cell differentiation in the large hairy armadillo Chaetophractus villosus throughout the year, describing a cycle of the seminiferous epithelium made of eight different stages. Evaluation of the testis/body mass ratio, analysis of the architecture of the seminiferous epithelium and the frequency of defective seminiferous tubules allowed identification of a temporal interruption of spermatogenesis during the period between mid-May to July (mid-end autumn) in correlation with very low testosterone levels. Overall, these results suggest that spermatogenesis is seasonal in C. villosus.
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