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Impact of captive conditions on female germinal epithelium of the butterflyfish Chaetodon striatus (Perciformes: Chaetodontidae)
Zygote ( IF 1.7 ) Pub Date : 2021-01-15 , DOI: 10.1017/s0967199420000763
Talita Sarah Mazzoni 1 , Graziele Cristine da Silva 1, 2 , Isabelle Leite Bayona Perez 2 , Irani Quagio-Grassiotto 3
Affiliation  

Summary Chaetodon striatus is a cosmopolitan seawater species present in aquaria all over the world and its extractivism is quite high. The lack of studies on the reproductive biology of C. striatus contributes to the difficulty in managing the species outside its natural habitat. Without knowledge of the mechanisms that control or affect gonadal changes, reproduction of C. striatus in captivity has become almost impossible, considering that the species is quite sensitive and the effect of captive conditions on its reproductive biology is unknown. Therefore, this study aimed to evaluate the effect on its reproductive biology of the animal’s confinement and possible alteration in structure of the ovaries. In C. striatus, after oocyte development, for animals confined in small spaces, maturing oocytes undergo atresia. During atresia, ovarian follicles were at different stages of degeneration, characterized by the progressive loss of the basement membrane and disorganization of the follicle complex. In the advanced stage of follicular atresia, there was total loss of the basement membrane, culminating in degradation of the follicle complex. In unconfined animals, oocyte development and maturation were not affected. Confinement also affected the cell structure of the germinal epithelium, which showed large numbers of apoptotic bodies. The difference in cortisol and glucose levels between the unconfined and confined groups was significant, which may have to do with the change found in the ovaries, such as extensive follicular atresia and loss of the basement membrane.

中文翻译:

圈养条件对蝴蝶鱼 Chaetodon striatus (Perciformes: Chaetodontidae) 雌性生发上皮的影响

概括毛齿蛉是一种世界性的海水物种,存在于世界各地的水族馆中,其采掘性相当高。缺乏生殖生物学研究纹状体导致在其自然栖息地之外管理该物种的困难。在不了解控制或影响性腺变化的机制的情况下,纹状体考虑到该物种非常敏感并且圈养条件对其生殖生物学的影响尚不清楚,因此圈养几乎是不可能的。因此,本研究旨在评估动物禁闭对其生殖生物学的影响以及卵巢结构可能发生的改变。在纹状体,卵母细胞发育后,对于被限制在狭小空间内的动物,成熟的卵母细胞会发生闭锁。在闭锁期间,卵巢卵泡处于不同的退化阶段,其特征是基底膜进行性丧失和卵泡复合体的紊乱。在卵泡闭锁的晚期,基底膜完全丧失,最终导致卵泡复合体降解。在不受限制的动物中,卵母细胞的发育和成熟不受影响。限制也影响了生发上皮的细胞结构,显示出大量的凋亡小体。无限制组和限制组之间皮质醇和葡萄糖水平的差异是显着的,这可能与卵巢中发现的变化有关,
更新日期:2021-01-15
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