Sexual cycle and seasonal expression of testosterone (T) in the testes of Sclerophrys mauritanica (Schlegel, 1841)

IF 0.8 4区 生物学 Q3 ZOOLOGY African Journal of Herpetology Pub Date : 2017-07-03 DOI:10.1080/21564574.2017.1369170
Omar Kisserli, E. Moudilou, J. Exbrayat
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引用次数: 2

Abstract

Abstract Sclerophrys mauritanica is an anuran amphibian found in the wetlands of Beni-belaid, Jijel, Algeria. The animals are constrained by wet (from September until May) and dry (from June until August) seasons, however, the sexual cycle of males is continuous (all germ cells categories are present throughout the year). The aim of this study was to follow the changes in the reproductive organs of male toads during the annual breeding cycle using light microscopy. Our study was conducted over the period 2003 to 2005. The surfaces of testicular sections, interstitial tissue and Leydig cells, as well as the number of total seminiferous tubules with spermatozoa in bundles, were analysed. All showed monthly variations throughout the annual breeding cycle. For each year, the surface of testis sections and the number of spermatozoa in bundles fluctuate in the same way throughout the year, with a strong increase during the dry season (maximum in August) and a slow decrease until January. The surface of interstitial tissue remained stable, with the exception of a strong peak in August. Additionally, the surface of Leydig cells showed a substantial peak in May before the dry period. Finally, testosterone was observed every month of the year.
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毛里塔尼亚硬化症患者睾丸中睾酮(T)的性周期和季节性表达(Schlegel, 1841)
摘要毛喉硬眼虫(Sclerophrys mauritanica)是一种无尾两栖动物,分布于阿尔及利亚吉杰尔的贝尼-贝莱德湿地。动物受到雨季(从9月到5月)和旱季(从6月到8月)的限制,然而,雄性的性周期是连续的(全年都存在所有生殖细胞类别)。本研究的目的是使用光学显微镜跟踪雄性蟾蜍在年度繁殖周期中生殖器官的变化。我们的研究是在2003年至2005年期间进行的。分析了睾丸切片、间质组织和睾丸间质细胞的表面,以及精子成束的总曲精小管的数量。在整个年度繁殖周期中,所有品种都表现出月度变化。每年,睾丸切片的表面和成束精子的数量在一年中都以同样的方式波动,在旱季期间大幅增加(8月最大),直到1月才缓慢减少。间质组织的表面保持稳定,除了8月份的一个强烈峰值。此外,Leydig细胞的表面在干旱期之前的5月显示出显著的峰值。最后,一年中每个月都会观察到睾酮。
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来源期刊
CiteScore
3.00
自引率
6.70%
发文量
15
审稿时长
>12 weeks
期刊介绍: African Journal of Herpetology (AJH) serves as an outlet for original research on the biology of African amphibians and reptiles. AJH is an interdisciplinary journal that publishes original articles and reviews from diverse fields and disciplines, such as conservation, phylogenetics, evolution, systematics, performance, physiology, ecology, behavioural ecology, ethology, and morphology. The Journal publishes two issues a year. There are no page charges .
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