Oocyte structure and ultrastructure in the Mexican silverside fish Chirostoma humboldtianum (Atheriniformes: Atherinopsidae)
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| Formato: | Online |
| Idioma: | eng |
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Universidad de Costa Rica
2008
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| Acceso en línea: | https://revistas.ucr.ac.cr/index.php/rbt/article/view/5762 |
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RBT5762 |
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RBT57622022-06-06T18:05:27Z Oocyte structure and ultrastructure in the Mexican silverside fish Chirostoma humboldtianum (Atheriniformes: Atherinopsidae) Oocyte structure and ultrastructure in the Mexican silverside fish Chirostoma humboldtianum (Atheriniformes: Atherinopsidae) Cárdenas, Rodolfo Chávez, Mónica Luis González, José Aley, Patricia Espinoza, Jesús Felipe Jiménez García, Luis Chirostoma ovario ultraestructura oocitos teleosteos ovary ultrastructure oocyte teleost The structural and ultrastructural features of gonads from endemic Mexican fish have received scarce attention. This study describes the histological and ultrastructural characteristics of the oocyte in Chirostoma humboldtianum. The ovary is asynchronic, and as such, most phases of oocyte development are found in the same ovary. The complete process of oogenesis was divided in five stages: oogonium and folliculogenesis, primary growth, cortical alveoli and lipid inclusions, vitellogenesis and maturation. The presence of big filaments, which appear at the end of primary growth, induces some common follicular adaptation. During primary growth, abundant ribosomes, rough endoplasmic reticulum, and mitochondria are grouped in the cytoplasm. At the end of this stage, the Z1 layer of the chorion is developed, while microvilli start to be evident as well. In the cortical alveoli and lipid droplets phase, intense PAS positive vesicles, some of them containing nucleoid material, are observed in the peripheral cytoplasm and the lipid droplets take a more central position. In vitellogenesis, the proteic yolk accumulates in a centripetal way while the chorion is completely formed. In maturation, the germinal vesicle migrates to the animal pole, meiosis is restored, and there is nuclear breakdown. The oocyte increases its size and holds some oil droplets and a big fluid mass of yolk. On the outside, filaments surround the oocyte completely. Universidad de Costa Rica 2008-12-01 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Article Text application/pdf https://revistas.ucr.ac.cr/index.php/rbt/article/view/5762 10.15517/rbt.v56i4.5762 Revista de Biología Tropical; Vol. 56 No. 4 (2008): Volume 56 – Regular number 4 – December 2008; 1825–1835 Revista de Biología Tropical; Vol. 56 Núm. 4 (2008): Volumen 56 – Número regular 4 – Diciembre 2008; 1825–1835 Revista Biología Tropical; Vol. 56 N.º 4 (2008): Volume 56 – Regular number 4 – December 2008; 1825–1835 2215-2075 0034-7744 10.15517/rbt.v56i4 eng https://revistas.ucr.ac.cr/index.php/rbt/article/view/5762/5503 Copyright (c) 2008 Revista de Biología Tropical http://creativecommons.org/licenses/by/4.0 |
| institution |
Universidad de Costa Rica |
| collection |
Revista de Biología Tropical |
| language |
eng |
| format |
Online |
| author |
Cárdenas, Rodolfo Chávez, Mónica Luis González, José Aley, Patricia Espinoza, Jesús Felipe Jiménez García, Luis |
| spellingShingle |
Cárdenas, Rodolfo Chávez, Mónica Luis González, José Aley, Patricia Espinoza, Jesús Felipe Jiménez García, Luis Oocyte structure and ultrastructure in the Mexican silverside fish Chirostoma humboldtianum (Atheriniformes: Atherinopsidae) |
| author_facet |
Cárdenas, Rodolfo Chávez, Mónica Luis González, José Aley, Patricia Espinoza, Jesús Felipe Jiménez García, Luis |
| author_sort |
Cárdenas, Rodolfo |
| title |
Oocyte structure and ultrastructure in the Mexican silverside fish Chirostoma humboldtianum (Atheriniformes: Atherinopsidae) |
| title_short |
Oocyte structure and ultrastructure in the Mexican silverside fish Chirostoma humboldtianum (Atheriniformes: Atherinopsidae) |
| title_full |
Oocyte structure and ultrastructure in the Mexican silverside fish Chirostoma humboldtianum (Atheriniformes: Atherinopsidae) |
| title_fullStr |
Oocyte structure and ultrastructure in the Mexican silverside fish Chirostoma humboldtianum (Atheriniformes: Atherinopsidae) |
| title_full_unstemmed |
Oocyte structure and ultrastructure in the Mexican silverside fish Chirostoma humboldtianum (Atheriniformes: Atherinopsidae) |
| title_sort |
oocyte structure and ultrastructure in the mexican silverside fish chirostoma humboldtianum (atheriniformes: atherinopsidae) |
| title_alt |
Oocyte structure and ultrastructure in the Mexican silverside fish Chirostoma humboldtianum (Atheriniformes: Atherinopsidae) |
| publisher |
Universidad de Costa Rica |
| publishDate |
2008 |
| url |
https://revistas.ucr.ac.cr/index.php/rbt/article/view/5762 |
| work_keys_str_mv |
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| _version_ |
1810114571507073024 |