Ovary maturation stages and oocyte features in three species of the neotropical fish Hemiodus (Müller, 1842)
Macro- and microscopic ovarian features of Hemiodus microlepis, H. ternetzi and H. unimaculatus were analyzed. Based on these features we proposed an ovarian maturation scale. The nine stages of the preliminary macroscopic fieldwork scale were reduced to five after microscopic analysis of ovaries. T...
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| Format: | Article |
| Language: | English |
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Instituto de Tecnologia do Paraná (Tecpar)
2003-06-01
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| Series: | Brazilian Archives of Biology and Technology |
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| Online Access: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000300015 |
| _version_ | 1818291655906689024 |
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| author | Claudia Angelica da Silva Brandão Maria de Fátima Moraes Valentim Érica Pellegrini Caramaschi |
| author_facet | Claudia Angelica da Silva Brandão Maria de Fátima Moraes Valentim Érica Pellegrini Caramaschi |
| author_sort | Claudia Angelica da Silva Brandão |
| collection | DOAJ |
| description | Macro- and microscopic ovarian features of Hemiodus microlepis, H. ternetzi and H. unimaculatus were analyzed. Based on these features we proposed an ovarian maturation scale. The nine stages of the preliminary macroscopic fieldwork scale were reduced to five after microscopic analysis of ovaries. The microscopic analysis indicated a group-synchronous oocyte development common to the three species that were characterized as iteroparous synchronous spawners with a total spawning type. The remarkable thickness of the zona radiata layer and the large size of vitellogenic oocytes of Hemiodus ternetzi distinguished this species from the others.<br>Características macro- e microscópicas dos ovários de Hemiodus microlepis, H. ternetzi e H. unimaculatus foram analisadas. Com base nestas características foi proposta uma escala de maturação. Após a análise microscópica dos ovários, a escala macroscópica preliminar de nove estádios, utilizada em campo, foi reduzida a cinco. A análise microscópica indicou que o desenvolvimento grupo-sincrônico dos ovócitos foi comum às três espécies, caracterizadas como iteróparas de desova total. A notável espessura da zona pelúcida e o maior tamanho dos ovócitos vitelogênicos de Hemiodus ternetzi diferenciaram esta espécie das demais. |
| first_indexed | 2024-12-13T02:47:31Z |
| format | Article |
| id | doaj.art-456d4f5b3cd3417e9f18800ce85a3b67 |
| institution | Directory Open Access Journal |
| issn | 1516-8913 1678-4324 |
| language | English |
| last_indexed | 2024-12-13T02:47:31Z |
| publishDate | 2003-06-01 |
| publisher | Instituto de Tecnologia do Paraná (Tecpar) |
| record_format | Article |
| series | Brazilian Archives of Biology and Technology |
| spelling | doaj.art-456d4f5b3cd3417e9f18800ce85a3b672022-12-22T00:02:09ZengInstituto de Tecnologia do Paraná (Tecpar)Brazilian Archives of Biology and Technology1516-89131678-43242003-06-0146343344110.1590/S1516-89132003000300015Ovary maturation stages and oocyte features in three species of the neotropical fish Hemiodus (Müller, 1842)Claudia Angelica da Silva BrandãoMaria de Fátima Moraes ValentimÉrica Pellegrini CaramaschiMacro- and microscopic ovarian features of Hemiodus microlepis, H. ternetzi and H. unimaculatus were analyzed. Based on these features we proposed an ovarian maturation scale. The nine stages of the preliminary macroscopic fieldwork scale were reduced to five after microscopic analysis of ovaries. The microscopic analysis indicated a group-synchronous oocyte development common to the three species that were characterized as iteroparous synchronous spawners with a total spawning type. The remarkable thickness of the zona radiata layer and the large size of vitellogenic oocytes of Hemiodus ternetzi distinguished this species from the others.<br>Características macro- e microscópicas dos ovários de Hemiodus microlepis, H. ternetzi e H. unimaculatus foram analisadas. Com base nestas características foi proposta uma escala de maturação. Após a análise microscópica dos ovários, a escala macroscópica preliminar de nove estádios, utilizada em campo, foi reduzida a cinco. A análise microscópica indicou que o desenvolvimento grupo-sincrônico dos ovócitos foi comum às três espécies, caracterizadas como iteróparas de desova total. A notável espessura da zona pelúcida e o maior tamanho dos ovócitos vitelogênicos de Hemiodus ternetzi diferenciaram esta espécie das demais.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000300015Hemiodontidoocyte developmentzona radiatafish reproductionTocantins River |
| spellingShingle | Claudia Angelica da Silva Brandão Maria de Fátima Moraes Valentim Érica Pellegrini Caramaschi Ovary maturation stages and oocyte features in three species of the neotropical fish Hemiodus (Müller, 1842) Brazilian Archives of Biology and Technology Hemiodontid oocyte development zona radiata fish reproduction Tocantins River |
| title | Ovary maturation stages and oocyte features in three species of the neotropical fish Hemiodus (Müller, 1842) |
| title_full | Ovary maturation stages and oocyte features in three species of the neotropical fish Hemiodus (Müller, 1842) |
| title_fullStr | Ovary maturation stages and oocyte features in three species of the neotropical fish Hemiodus (Müller, 1842) |
| title_full_unstemmed | Ovary maturation stages and oocyte features in three species of the neotropical fish Hemiodus (Müller, 1842) |
| title_short | Ovary maturation stages and oocyte features in three species of the neotropical fish Hemiodus (Müller, 1842) |
| title_sort | ovary maturation stages and oocyte features in three species of the neotropical fish hemiodus muller 1842 |
| topic | Hemiodontid oocyte development zona radiata fish reproduction Tocantins River |
| url | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132003000300015 |
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