Oogenesis in Laetacara araguaiae (Ottoni and Costa, 2009) (Labriformes: Cichlidae)
| Autor: | Alexandre Ninhaus-Silveira, Amanda Pereira dos Santos-Silva, Rosicleire Veríssimo-Silveira, Diógenes Henrique de Siqueira-Silva |
|---|---|
| Rok vydání: | 2015 |
| Předmět: |
0106 biological sciences
Germinal epithelium food.ingredient 010607 zoology Biology 010603 evolutionary biology 01 natural sciences Oogenesis Oogonia food Microscopy Electron Transmission Ovarian Follicle Meiosis Yolk medicine Animals Germinal vesicle Cichlids Cell Biology Oocyte Cell biology medicine.anatomical_structure Oocytes Female Vitellogenesis Folliculogenesis Developmental Biology |
| Zdroj: | Zygote. 24:502-510 |
| ISSN: | 1469-8730 0967-1994 |
| DOI: | 10.1017/s0967199415000465 |
| Popis: | SummaryWe aimed to analyze the oogenesis of adult females of the cichlid fish Laetacara araguaiae. The specimens’ gonads were removed and processed for light and transmission electron microscopy. Oogenesis in L. araguaiae showed the following characteristics: a germinal epithelium with three types of oogonia (A-undifferentiated, A-differentiated and B-oogonia), oocytes at meiotic prophase stage and ovarian follicle formation. Oocytes showing primary growth with pre-vitellogenic and cortical alveolus were observed. Similar to data for other cichlids, oocytes in secondary growth or vitellogenesis were characterized by the initial deposition of yolk microgranules. The event that characterizes the maturation stage is nucleolus migration, also called the germinal vesicle, to the oocyte periphery in the direction of the micropyle. The follicular complex undergoes several changes throughout the oocyte stages. To the best of our knowledge this study is the first to describe L. araguaiae oogenesis. Moreover, this study is the first step to better understand the reproductive biology of this species, which shows great potential for use as an ornamental fish. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|