Gonadal steroids levels and vitellogenesis in the formation of oocytes in Prochilodus lineatus (Valenciennes) (Teleostei: Characiformes)
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1590/S1679-62252012005000021 http://hdl.handle.net/11449/227062 |
Resumo: | The objective of this study was to obtain information about the possible mechanisms related to poor reproductive performance in tropical rheophilic fish. To that effect, cages (Cs) and earthen ponds (EPs) were used as experimental systems to provide unsuitable and suitable conditions, respectively, for curimbatá (Prochilodus lineatus) breeders. Fish were maintained under experimental conditions for 18 months, and during this period females were randomly sampled every two months for biometric analysis (n=30), blood (n=5/sampling) and ovary (n=5/sampling). After this period EPs females (EPFs) and Cs females (CFs) were submitted to the induced breeding experiments. The results showed that rearing curimbatá for such long time in a cage at this stocking density, reduces its growth, plasma E2 levels and vitellogenesis. During vitellogenesis, the mean plasma estradiol levels of CFs were three times lower than those of EPFs (P<0.01). CFs presented poorer results than EPFs for all the examined parameters of reproductive performance. Taken together these data showed that the reduced estradiol levels during vitellogenesis (and the consequently less intense transition from the previtellogenic to vitellogenic phase) and reduced amounts of yolk are mechanisms associated with the formation of low quality oocytes and shortened and delayed breeding season in this species. Moreover, our data showed that the onset of vitellogenesis (six months before the spawning season) must be considered as a key period related to the formation of oocytes of good quality, and adequate management should be provided throughout the year. © 2012 Sociedade Brasileira de Ictiologia. |
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Repositório Institucional da UNESP |
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Gonadal steroids levels and vitellogenesis in the formation of oocytes in Prochilodus lineatus (Valenciennes) (Teleostei: Characiformes)Reproductive cycleSpawning performanceSteroid levelsTropical rheophilic fishThe objective of this study was to obtain information about the possible mechanisms related to poor reproductive performance in tropical rheophilic fish. To that effect, cages (Cs) and earthen ponds (EPs) were used as experimental systems to provide unsuitable and suitable conditions, respectively, for curimbatá (Prochilodus lineatus) breeders. Fish were maintained under experimental conditions for 18 months, and during this period females were randomly sampled every two months for biometric analysis (n=30), blood (n=5/sampling) and ovary (n=5/sampling). After this period EPs females (EPFs) and Cs females (CFs) were submitted to the induced breeding experiments. The results showed that rearing curimbatá for such long time in a cage at this stocking density, reduces its growth, plasma E2 levels and vitellogenesis. During vitellogenesis, the mean plasma estradiol levels of CFs were three times lower than those of EPFs (P<0.01). CFs presented poorer results than EPFs for all the examined parameters of reproductive performance. Taken together these data showed that the reduced estradiol levels during vitellogenesis (and the consequently less intense transition from the previtellogenic to vitellogenic phase) and reduced amounts of yolk are mechanisms associated with the formation of low quality oocytes and shortened and delayed breeding season in this species. Moreover, our data showed that the onset of vitellogenesis (six months before the spawning season) must be considered as a key period related to the formation of oocytes of good quality, and adequate management should be provided throughout the year. © 2012 Sociedade Brasileira de Ictiologia.Universidade Estadual Paulista 'Júlio de Mesquito Filho' Centro de Aquicultura (CAUNESP), Via de Acesso Prof. Paulo Donato Castelane, s/n, 14884-900 Jaboticabal, SPUniversidade de São Paulo Instituto de Biociências, Rua do Matão, Trav. 14, n. 321, 05508-090 São Paulo, SPUniversidade Estadual Paulista 'Júlio de Mesquito Filho' Centro de Aquicultura (CAUNESP), Via de Acesso Prof. Paulo Donato Castelane, s/n, 14884-900 Jaboticabal, SPUniversidade Estadual Paulista (UNESP)Universidade de São Paulo (USP)Hainfellner, Patrick [UNESP]de Souza, Thiago Gonçalves [UNESP]Moreira, Renata GuimarãesNakaghi, Laura Satiko Okada [UNESP]Batlouni, Sergio Ricardo [UNESP]2022-04-29T06:13:22Z2022-04-29T06:13:22Z2012-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article601-612http://dx.doi.org/10.1590/S1679-62252012005000021Neotropical Ichthyology, v. 10, n. 3, p. 601-612, 2012.1679-6225http://hdl.handle.net/11449/22706210.1590/S1679-622520120050000212-s2.0-84871172086Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengNeotropical Ichthyologyinfo:eu-repo/semantics/openAccess2024-04-09T15:29:47Zoai:repositorio.unesp.br:11449/227062Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:10:08.647970Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Gonadal steroids levels and vitellogenesis in the formation of oocytes in Prochilodus lineatus (Valenciennes) (Teleostei: Characiformes) |
title |
Gonadal steroids levels and vitellogenesis in the formation of oocytes in Prochilodus lineatus (Valenciennes) (Teleostei: Characiformes) |
spellingShingle |
Gonadal steroids levels and vitellogenesis in the formation of oocytes in Prochilodus lineatus (Valenciennes) (Teleostei: Characiformes) Hainfellner, Patrick [UNESP] Reproductive cycle Spawning performance Steroid levels Tropical rheophilic fish |
title_short |
Gonadal steroids levels and vitellogenesis in the formation of oocytes in Prochilodus lineatus (Valenciennes) (Teleostei: Characiformes) |
title_full |
Gonadal steroids levels and vitellogenesis in the formation of oocytes in Prochilodus lineatus (Valenciennes) (Teleostei: Characiformes) |
title_fullStr |
Gonadal steroids levels and vitellogenesis in the formation of oocytes in Prochilodus lineatus (Valenciennes) (Teleostei: Characiformes) |
title_full_unstemmed |
Gonadal steroids levels and vitellogenesis in the formation of oocytes in Prochilodus lineatus (Valenciennes) (Teleostei: Characiformes) |
title_sort |
Gonadal steroids levels and vitellogenesis in the formation of oocytes in Prochilodus lineatus (Valenciennes) (Teleostei: Characiformes) |
author |
Hainfellner, Patrick [UNESP] |
author_facet |
Hainfellner, Patrick [UNESP] de Souza, Thiago Gonçalves [UNESP] Moreira, Renata Guimarães Nakaghi, Laura Satiko Okada [UNESP] Batlouni, Sergio Ricardo [UNESP] |
author_role |
author |
author2 |
de Souza, Thiago Gonçalves [UNESP] Moreira, Renata Guimarães Nakaghi, Laura Satiko Okada [UNESP] Batlouni, Sergio Ricardo [UNESP] |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) Universidade de São Paulo (USP) |
dc.contributor.author.fl_str_mv |
Hainfellner, Patrick [UNESP] de Souza, Thiago Gonçalves [UNESP] Moreira, Renata Guimarães Nakaghi, Laura Satiko Okada [UNESP] Batlouni, Sergio Ricardo [UNESP] |
dc.subject.por.fl_str_mv |
Reproductive cycle Spawning performance Steroid levels Tropical rheophilic fish |
topic |
Reproductive cycle Spawning performance Steroid levels Tropical rheophilic fish |
description |
The objective of this study was to obtain information about the possible mechanisms related to poor reproductive performance in tropical rheophilic fish. To that effect, cages (Cs) and earthen ponds (EPs) were used as experimental systems to provide unsuitable and suitable conditions, respectively, for curimbatá (Prochilodus lineatus) breeders. Fish were maintained under experimental conditions for 18 months, and during this period females were randomly sampled every two months for biometric analysis (n=30), blood (n=5/sampling) and ovary (n=5/sampling). After this period EPs females (EPFs) and Cs females (CFs) were submitted to the induced breeding experiments. The results showed that rearing curimbatá for such long time in a cage at this stocking density, reduces its growth, plasma E2 levels and vitellogenesis. During vitellogenesis, the mean plasma estradiol levels of CFs were three times lower than those of EPFs (P<0.01). CFs presented poorer results than EPFs for all the examined parameters of reproductive performance. Taken together these data showed that the reduced estradiol levels during vitellogenesis (and the consequently less intense transition from the previtellogenic to vitellogenic phase) and reduced amounts of yolk are mechanisms associated with the formation of low quality oocytes and shortened and delayed breeding season in this species. Moreover, our data showed that the onset of vitellogenesis (six months before the spawning season) must be considered as a key period related to the formation of oocytes of good quality, and adequate management should be provided throughout the year. © 2012 Sociedade Brasileira de Ictiologia. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-09-01 2022-04-29T06:13:22Z 2022-04-29T06:13:22Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://dx.doi.org/10.1590/S1679-62252012005000021 Neotropical Ichthyology, v. 10, n. 3, p. 601-612, 2012. 1679-6225 http://hdl.handle.net/11449/227062 10.1590/S1679-62252012005000021 2-s2.0-84871172086 |
url |
http://dx.doi.org/10.1590/S1679-62252012005000021 http://hdl.handle.net/11449/227062 |
identifier_str_mv |
Neotropical Ichthyology, v. 10, n. 3, p. 601-612, 2012. 1679-6225 10.1590/S1679-62252012005000021 2-s2.0-84871172086 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Neotropical Ichthyology |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
601-612 |
dc.source.none.fl_str_mv |
Scopus reponame:Repositório Institucional da UNESP instname:Universidade Estadual Paulista (UNESP) instacron:UNESP |
instname_str |
Universidade Estadual Paulista (UNESP) |
instacron_str |
UNESP |
institution |
UNESP |
reponame_str |
Repositório Institucional da UNESP |
collection |
Repositório Institucional da UNESP |
repository.name.fl_str_mv |
Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP) |
repository.mail.fl_str_mv |
|
_version_ |
1808128764941434880 |