ABSTRACT

Aegla castro SCHIMITT, 1942Aegla castro Schmitt, is an endemic anomuran crab from Brazil found in headwater streams of the Atlantic Forest on the Paranapanema River basin. This study aims to evaluate the gonadal maturity of A. castro based on macroscopic and microscopic analyses. Crabs were collected in Mauá da Serra (23º57’ S; 51º06ʹ W), Paraná, Brazil in the winter and spring of 2015, and summer, autumn, and spring of 2016. Individuals had their gonads analysed and categorized into stages of development. Stage1, ovaries are macroscopically undetectable through abdominal transparency, while ovaries of stages 2 and 3 could be detected through abdominal transparency and have characteristic colour and length in relation to the abdominal somites. Ovaries have pre-vitellogenic and vitellogenic oocytes in all stages of development, with germ cells and structural epithelium characteristic of these gonadal maturation phases. Spermatogenesis in males begins in spring, with the production of spermatozoa in autumn and spermiation in winter. Aegla castro has seasonal reproduction. The macroscopic stages of gonadal development correspond to the histological gonadal maturation, indicating that the macroscopic observation of the gonads of live animals is feasible in studies of the reproductive cycle of aeglids.

摘要

Aegla castro SCHIMITT，1942年，Aegla castro Schmitt，是一种来自巴西的地方性无尾蟹，在巴拉那帕内玛河盆地的大西洋森林的源头溪流中发现。这项研究旨在评估A. castro的性腺成熟度基于宏观和微观分析。2015年冬季和春季，以及2016年夏季，秋季和2016年春季，在巴西巴拉那州的Mauáda Serra（南纬23º57'；西纬51º06ʹ）采集了螃蟹。对每个人的性腺进行了分析并归类为发育阶段。在第1阶段，通过腹部透明性在宏观上无法检测到卵巢，而在第2阶段和第3阶段的卵巢可以通过腹部透明性来检测，并且相对于腹节具有特征性的颜色和长度。卵巢在发育的各个阶段都具有卵母细胞形成和卵黄形成前的卵母细胞，这些性腺成熟阶段具有生殖细胞和结构上皮特征。男性的精子发生始于春季，秋季产生精子，冬季产生精子。艾格拉·卡斯特罗（Aegla Castro）有季节性繁殖。性腺发育的宏观阶段与组织学性腺成熟相对应，这表明从宏观上观察活体动物的性腺在研究埃及蜥蜴的繁殖周期方面是可行的。