Seasonal testicular changes in Dendropsophus minutus Peters, 1872 (Anura,Hylidae) |
| |
| Authors: | ADELINA FERREIRA AND MAHMOUD MEHANNA |
| |
| Affiliation: | 1. Universidade Federal de Mato Grosso (UFMT), Instituto de Biociências, Cuiabá, MT, Brasil.
2. Universidade Estadual Paulista Julio de Mesquita Filho (UNESP), Laboratório de Biologia de Peixes, Pós-graduação em Zoologia, Botucatu, SP, Brasil. |
| |
| Abstract: | The reproductive cycle in anurans may be either continuous or discontinuous. These differences may be connected to seasonal climate changes and/or to anthropic activity. Forty adult male individuals of the Dendropsophus minutus species were collected during one year, in the municipality of Chapada dos Guimarães (Mato Grosso, Brazil). The testicles were studied under light and transmission electron microscopy. No variations were observed when the diameter of the seminiferous tubules and the thickness of the interstitial tissue were studied. However, changes in spermatogenesis were conspicuous and indicated that the reproductive cycle of D. minutus in Chapada dos Guimarães is discontinuous and seems related to variations in air temperature and rainfall. |
| |
| Keywords: | spermatogenesis reproduction anura ultrastructure Chapada dos Guimarães |
|
| 点击此处可从《Biocell》浏览原始摘要信息 |
|
点击此处可从《Biocell》下载全文 |
|
