Involvement of the gonadal germinal epithelium during sex reversal and seasonal testicular cycling in the protogynous swamp eel, Synbranchus marmoratus Bloch 1795 (Teleostei, Synbranchidae)
The swamp eel, Synbranchus marmoratus, is a protogynous, diandric species. During sex reversal, the ovarian germinal epithelium, which forms follicles containing an oocyte and encompassing follicle cells during the female portion of the life cycle, produces numerous invaginations, or acini, into the...
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2003
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| Acceso en línea: | https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03622525_v257_n1_p107_LoNostro http://hdl.handle.net/20.500.12110/paper_03622525_v257_n1_p107_LoNostro |
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paper:paper_03622525_v257_n1_p107_LoNostro2023-06-08T15:35:01Z Involvement of the gonadal germinal epithelium during sex reversal and seasonal testicular cycling in the protogynous swamp eel, Synbranchus marmoratus Bloch 1795 (Teleostei, Synbranchidae) Annual cycle Germinal epithelium Sex reversal Swamp eels Synbranchiformes Testis animal article epithelium female growth, development and aging immunohistochemistry male ovary physiology reproduction Smegmamorpha spermatogenesis testis Animals Epithelium Female Immunohistochemistry Male Ovary Sex Reversal, Gonadal Smegmamorpha Spermatogenesis Testis Anguilliformes Gonia Monopterus albus Synbranchidae Synbranchiformes Synbranchus marmoratus Teleostei The swamp eel, Synbranchus marmoratus, is a protogynous, diandric species. During sex reversal, the ovarian germinal epithelium, which forms follicles containing an oocyte and encompassing follicle cells during the female portion of the life cycle, produces numerous invaginations, or acini, into the ovarian stroma. Within the acini, the gonia that formerly produced oocytes become spermatogonia, enter meiosis, and produce sperm. The acini are bounded by the basement membrane of the germinal epithelium. Epithelial cells of the female germinal epithelium, which formerly became follicle (granulosa) cells, now become Sertoli cells in the developing testis. Subsequently, lobules and testicular ducts form. The swamp eel testis has a lobular germinal compartment in both primary and secondary males, although the germinal compartment in testes of secondary males resides within the former ovarian lamellae. The germinal compartment, supported by a basement membrane, is composed of Sertoli and germ cells that give rise to sperm. Histological and immunohistochemical techniques were used to describe the five reproductive classes that were observed to occur during the annual reproductive cycle: regressed, early maturation, mid-maturation, late maturation, and regression. These classes are differentiated by the presence of continuous or discontinuous germinal epithelia and by the types of germ cells present. Synbranchus marmoratus has a permanent germinal epithelium. Differences between the germinal compartment of the testes of primary and secondary males were not observed. © 2003 Wiley-Liss, Inc. 2003 https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03622525_v257_n1_p107_LoNostro http://hdl.handle.net/20.500.12110/paper_03622525_v257_n1_p107_LoNostro |
| institution |
Universidad de Buenos Aires |
| institution_str |
I-28 |
| repository_str |
R-134 |
| collection |
Biblioteca Digital - Facultad de Ciencias Exactas y Naturales (UBA) |
| topic |
Annual cycle Germinal epithelium Sex reversal Swamp eels Synbranchiformes Testis animal article epithelium female growth, development and aging immunohistochemistry male ovary physiology reproduction Smegmamorpha spermatogenesis testis Animals Epithelium Female Immunohistochemistry Male Ovary Sex Reversal, Gonadal Smegmamorpha Spermatogenesis Testis Anguilliformes Gonia Monopterus albus Synbranchidae Synbranchiformes Synbranchus marmoratus Teleostei |
| spellingShingle |
Annual cycle Germinal epithelium Sex reversal Swamp eels Synbranchiformes Testis animal article epithelium female growth, development and aging immunohistochemistry male ovary physiology reproduction Smegmamorpha spermatogenesis testis Animals Epithelium Female Immunohistochemistry Male Ovary Sex Reversal, Gonadal Smegmamorpha Spermatogenesis Testis Anguilliformes Gonia Monopterus albus Synbranchidae Synbranchiformes Synbranchus marmoratus Teleostei Involvement of the gonadal germinal epithelium during sex reversal and seasonal testicular cycling in the protogynous swamp eel, Synbranchus marmoratus Bloch 1795 (Teleostei, Synbranchidae) |
| topic_facet |
Annual cycle Germinal epithelium Sex reversal Swamp eels Synbranchiformes Testis animal article epithelium female growth, development and aging immunohistochemistry male ovary physiology reproduction Smegmamorpha spermatogenesis testis Animals Epithelium Female Immunohistochemistry Male Ovary Sex Reversal, Gonadal Smegmamorpha Spermatogenesis Testis Anguilliformes Gonia Monopterus albus Synbranchidae Synbranchiformes Synbranchus marmoratus Teleostei |
| description |
The swamp eel, Synbranchus marmoratus, is a protogynous, diandric species. During sex reversal, the ovarian germinal epithelium, which forms follicles containing an oocyte and encompassing follicle cells during the female portion of the life cycle, produces numerous invaginations, or acini, into the ovarian stroma. Within the acini, the gonia that formerly produced oocytes become spermatogonia, enter meiosis, and produce sperm. The acini are bounded by the basement membrane of the germinal epithelium. Epithelial cells of the female germinal epithelium, which formerly became follicle (granulosa) cells, now become Sertoli cells in the developing testis. Subsequently, lobules and testicular ducts form. The swamp eel testis has a lobular germinal compartment in both primary and secondary males, although the germinal compartment in testes of secondary males resides within the former ovarian lamellae. The germinal compartment, supported by a basement membrane, is composed of Sertoli and germ cells that give rise to sperm. Histological and immunohistochemical techniques were used to describe the five reproductive classes that were observed to occur during the annual reproductive cycle: regressed, early maturation, mid-maturation, late maturation, and regression. These classes are differentiated by the presence of continuous or discontinuous germinal epithelia and by the types of germ cells present. Synbranchus marmoratus has a permanent germinal epithelium. Differences between the germinal compartment of the testes of primary and secondary males were not observed. © 2003 Wiley-Liss, Inc. |
| title |
Involvement of the gonadal germinal epithelium during sex reversal and seasonal testicular cycling in the protogynous swamp eel, Synbranchus marmoratus Bloch 1795 (Teleostei, Synbranchidae) |
| title_short |
Involvement of the gonadal germinal epithelium during sex reversal and seasonal testicular cycling in the protogynous swamp eel, Synbranchus marmoratus Bloch 1795 (Teleostei, Synbranchidae) |
| title_full |
Involvement of the gonadal germinal epithelium during sex reversal and seasonal testicular cycling in the protogynous swamp eel, Synbranchus marmoratus Bloch 1795 (Teleostei, Synbranchidae) |
| title_fullStr |
Involvement of the gonadal germinal epithelium during sex reversal and seasonal testicular cycling in the protogynous swamp eel, Synbranchus marmoratus Bloch 1795 (Teleostei, Synbranchidae) |
| title_full_unstemmed |
Involvement of the gonadal germinal epithelium during sex reversal and seasonal testicular cycling in the protogynous swamp eel, Synbranchus marmoratus Bloch 1795 (Teleostei, Synbranchidae) |
| title_sort |
involvement of the gonadal germinal epithelium during sex reversal and seasonal testicular cycling in the protogynous swamp eel, synbranchus marmoratus bloch 1795 (teleostei, synbranchidae) |
| publishDate |
2003 |
| url |
https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_03622525_v257_n1_p107_LoNostro http://hdl.handle.net/20.500.12110/paper_03622525_v257_n1_p107_LoNostro |
| _version_ |
1768543086061813760 |