Morphological characterization of pirarucu Arapaima gigas (Schinz, 1822) gonadal differentiation,Journal of Morphology

当前位置： X-MOL 学术 › J. Morphol. › 论文详情

Our official English website, www.x-mol.net, welcomes your feedback! (Note: you will need to create a separate account there.)

Morphological characterization of pirarucu Arapaima gigas (Schinz, 1822) gonadal differentiation
Journal of Morphology ( IF 1.5 ) Pub Date : 2020-03-21 , DOI: 10.1002/jmor.21116
Aldessandro da Costa Amaral ₁ , Adriana F Lima ₂ , Luciana N Ganeco-Kirschnik ₂ , Fernanda L de Almeida ₃

Affiliation

Arapaima gigas is a giant air‐breathing and bony tongue fish from the Amazon basin and a promising species for aquaculture. A. gigas farming industry is still not established because of the lack of information on its reproductive physiology. Reproduction in captivity cannot be manipulated or stimulated, and the identification of males and females in a broodstock is not easy. We aimed to reveal the morphological sex differentiation of pirarucu as studies involving gonad development are essential to understanding the reproductive physiology of any species. We performed histological analysis on the whole body and extracted the gonads of 150 juveniles. The first sign of ovary differentiation is the sex‐specific rearrangement of the germ cells. In 9 cm total length females, the germ cells group into nests and are restricted to the lateral face of the gonad, in close contact with the abdomen wall. With further development, this region invaginates and that later develops into ovigerous lamellae. Meiosis starts soon after ovary differentiation. In males, the germ cells are scattered along the elongated differentiating testis at first, and later become more restricted to the central region where the spermatogonial cysts start to develop. Somatic and germ cells are jointly involved in the cellular reorganization during gonadal differentiation, specifically when the germ cells begin to establish new associations during the development of both the germinal epithelium and stroma.

中文翻译：

巨骨舌鱼 (Schinz, 1822) 性腺分化的形态特征

巨骨舌鱼是来自亚马逊盆地的一种巨大的呼吸空气和骨舌鱼，是水产养殖的一种有前途的物种。由于缺乏有关其生殖生理学的信息，A. gigas 养殖业仍未建立。无法操纵或刺激圈养繁殖，亲鱼中的雄性和雌性鉴定并不容易。我们旨在揭示 pirarucu 的形态性别分化，因为涉及性腺发育的研究对于了解任何物种的生殖生理学至关重要。我们对整个身体进行了组织学分析，并提取了 150 只幼鱼的性腺。卵巢分化的第一个迹象是生殖细胞的性别特异性重排。在 9 厘米总长度的女性中，生殖细胞聚集成巢，并被限制在性腺的侧面，与腹壁紧密接触。随着进一步发展，该区域内陷，后来发展成产卵片层。卵巢分化后不久就开始减数分裂。在雄性中，生殖细胞首先沿着细长的分化睾丸散布，后来变得更加局限于精原囊肿开始发育的中心区域。体细胞和生殖细胞共同参与性腺分化过程中的细胞重组，特别是当生殖细胞在生发上皮和基质发育过程中开始建立新的关联时。卵巢分化后不久就开始减数分裂。在雄性中，生殖细胞首先沿着细长的分化睾丸散布，后来变得更加局限于精原囊肿开始发育的中心区域。体细胞和生殖细胞共同参与性腺分化过程中的细胞重组，特别是当生殖细胞在生发上皮和基质发育过程中开始建立新的关联时。卵巢分化后不久就开始减数分裂。在雄性中，生殖细胞最初沿着细长的分化睾丸散布，后来变得更加局限于精原囊肿开始发育的中央区域。体细胞和生殖细胞共同参与性腺分化过程中的细胞重组，特别是当生殖细胞在生发上皮和基质发育过程中开始建立新的关联时。

更新日期：2020-03-21

点击分享查看原文

点击收藏

阅读更多本刊最新论文本刊介绍/投稿指南11