期刊
REPRODUCTION FERTILITY AND DEVELOPMENT
卷 26, 期 6, 页码 834-846出版社
CSIRO PUBLISHING
DOI: 10.1071/RD13109
关键词
recrudescence; reproduction; seasonality; testes
资金
- Brazilian Research Foundation (CAPES)
- Sao Paulo State Research Foundation (FAPESP) [2009/16181-9, 2009/03470-2]
- Brazilian National Research and Development Council (CNPq) [300163/2008-8, 301596/2011-5, 302008/2010-1]
- Fundacao de Amparo a Pesquisa do Estado de Sao Paulo (FAPESP) [09/03470-2] Funding Source: FAPESP
Myotis nigricans presents few and controversial reproductive data, which indicate geographical variation in reproduction. Thus, this study aimed to evaluate the seasonal modifications in testicular and epididymal morphologies in a tropical environment, submitting these organs to morphometric and immunohistochemical analysis. The observations revealed that this species presents two peaks of spermatogenic activity followed by two periods of total testicular regression (a quiescent pre-pubertal-like morphology, where only Sertoli cells and spermatogonia could be observed), in the same annual reproductive cycle, which seem to be only indirectly influenced by abiotic factors. This testicular behaviour seems to be synchronised with the caput and corpus epididymidis, but not with the cauda epididymidis, which presents aspects of sperm storage in May-June. The control of this variation seems to be directly linked to the expression of the androgen receptor, since, throughout the year, it is high in periods of testicular recrudescence and low in periods of deactivation. It is not thought to be directly linked to apoptosis, which is more pronounced in periods of recrudescence than in periods of regression.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据