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Abstract:

Synbranchus marmoratus (Synbranchidae), commonly known as the swamp eel, is a protogynous diandric teleost fish widely distributed throughout South America. The purpose of this work was to study the ovarian anatomy and to describe oocyte developmental stages in the swamp eel, Synbranchus marmoratus. S. marmoratus has a unique sacular ovary. It is covered by a conspicuous muscular wall, probably involved in an egg-releasing system acting as a peristaltic-like mechanism. The internal ovarian anatomy shows a U-shaped ovarian lamella delimiting a dorsal ovarian lumen. The microscopic study shows evidence of the existence of a germinal epithelium in the inner surface of the lamella, which contains germinal cells, prefollicular cells and epithelial cells. The complete oogenesis process is divided into four stages: oogonia, primary growth, cortical alveoli and vitellogenesis. Besides, the ovulated oocytes, and atretic structures were described. The structure of the micropyle was studied by scanning electron microscopy (MEB). Near the animal pole the vitelline envelope forms crests that fuse together becoming furrow-like structures with a slightly spiraled direction that converge into the micropyle pit where is located the micropylar canal. Although the sex reversal process of Synbranchids has been subject of many studies, this is the first complete description of the ovarian anatomy and oogenesis.

Registro:

Documento: Artículo
Título:Oogenesis in the swamp eel Synbranchus marmoratus (Bloch, 1795) (Teleostei; synbranchidae). Ovarian anatomy, stages of oocyte development and micropyle structure
Autor:Ravaglia, M.A.; Maggese, M.C.
Filiación:Laboratorio de Embriologia Animal, Departamento de Biología, Universidad de Buenos Aires, Buenos Aires, Argentina
Laboratorio de Embriologia Animal, Depto. de Biodiv./Biol. Experimental, Universidad de Buenos Aires (UBA), Ciudad Universitaria, (C1428EHA) Buenos Aires, Argentina
Palabras clave:Micropyle; Oogenesis; Ovarian anatomy; Synbranchidae; animal tissue; article; controlled study; eel; female; germ layer; nonhuman; oocyte development; ovary; ovary follicle cell; scanning electron microscopy; teleost; vitelline membrane; vitellogenesis; Animals; Egg Proteins; Female; Microscopy, Electron, Scanning; Oocytes; Oogenesis; Oogonia; Ovary; Smegmamorpha; Anguilliformes; Animalia; Monopterus albus; Synbranchidae; Synbranchus marmoratus; Teleostei
Año:2002
Volumen:26
Número:3
Página de inicio:325
Página de fin:337
Título revista:Biocell
Título revista abreviado:Biocell
ISSN:03279545
CODEN:BOCEE
CAS:Egg Proteins
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03279545_v26_n3_p325_Ravaglia

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Citas:

---------- APA ----------
Ravaglia, M.A. & Maggese, M.C. (2002) . Oogenesis in the swamp eel Synbranchus marmoratus (Bloch, 1795) (Teleostei; synbranchidae). Ovarian anatomy, stages of oocyte development and micropyle structure. Biocell, 26(3), 325-337.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03279545_v26_n3_p325_Ravaglia [ ]
---------- CHICAGO ----------
Ravaglia, M.A., Maggese, M.C. "Oogenesis in the swamp eel Synbranchus marmoratus (Bloch, 1795) (Teleostei; synbranchidae). Ovarian anatomy, stages of oocyte development and micropyle structure" . Biocell 26, no. 3 (2002) : 325-337.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03279545_v26_n3_p325_Ravaglia [ ]
---------- MLA ----------
Ravaglia, M.A., Maggese, M.C. "Oogenesis in the swamp eel Synbranchus marmoratus (Bloch, 1795) (Teleostei; synbranchidae). Ovarian anatomy, stages of oocyte development and micropyle structure" . Biocell, vol. 26, no. 3, 2002, pp. 325-337.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03279545_v26_n3_p325_Ravaglia [ ]
---------- VANCOUVER ----------
Ravaglia, M.A., Maggese, M.C. Oogenesis in the swamp eel Synbranchus marmoratus (Bloch, 1795) (Teleostei; synbranchidae). Ovarian anatomy, stages of oocyte development and micropyle structure. Biocell. 2002;26(3):325-337.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03279545_v26_n3_p325_Ravaglia [ ]