Female sex inversion as a reason for an unbalanced sex ratio in the neotropical species Brycon orbignyanus
Autor(a) principal: | |
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Data de Publicação: | 2022 |
Outros Autores: | , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1111/are.15701 http://hdl.handle.net/11449/230007 |
Resumo: | The objective of this study was to temporally identify sex differentiation to morphologically characterize the formation of female and male germinal epithelium and verify the occurrence of the sex disproportion reported for this species in aquaculture. Specimens of Brycon orbignyanus cultivated in water recirculation systems with a constant temperature of 27 ± 0.5°C were used. Monthly samplings of B. orbignyanus (n = 15) were performed from two months of age until 1 year of age, and posteriorly isolated sampling was performed on specimens of two and three years of age. The gonads of the specimens were removed and processed for light microscopy. In the beginning, the undifferentiated gonads develop into ovaries (females; at three months of age) and functional testicles (primary males; at five months of age); however, some of the females go through a sex inversion process creating intersex individuals and posteriorly secondary males (at five months of age). Due to the processes of sex inversion and gonadal remodelling, the population sex proportion fluctuates until it is finally established at 1♀:2♂. Females above 15 cm are differentiated, while in males (primary and secondary), differentiation will only occur after the animal reaches 20 cm. At the end of the first year of age, primary males and secondary males reach sexual maturity, while female sexual maturity is only observed at three years of age. |
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Female sex inversion as a reason for an unbalanced sex ratio in the neotropical species Brycon orbignyanusgermline epitheliumgonadal differentiationhistologyoogenesissex inversionspermatogenesisThe objective of this study was to temporally identify sex differentiation to morphologically characterize the formation of female and male germinal epithelium and verify the occurrence of the sex disproportion reported for this species in aquaculture. Specimens of Brycon orbignyanus cultivated in water recirculation systems with a constant temperature of 27 ± 0.5°C were used. Monthly samplings of B. orbignyanus (n = 15) were performed from two months of age until 1 year of age, and posteriorly isolated sampling was performed on specimens of two and three years of age. The gonads of the specimens were removed and processed for light microscopy. In the beginning, the undifferentiated gonads develop into ovaries (females; at three months of age) and functional testicles (primary males; at five months of age); however, some of the females go through a sex inversion process creating intersex individuals and posteriorly secondary males (at five months of age). Due to the processes of sex inversion and gonadal remodelling, the population sex proportion fluctuates until it is finally established at 1♀:2♂. Females above 15 cm are differentiated, while in males (primary and secondary), differentiation will only occur after the animal reaches 20 cm. At the end of the first year of age, primary males and secondary males reach sexual maturity, while female sexual maturity is only observed at three years of age.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)L.I.NEO - Laboratory of Neotropical Ichthyology Departamento de Biologia e Zootecnia UNESP - Universidade Estadual Paulista ‘Júlio de Mesquita Filho’ Câmpus de Ilha SolteiraPrograma de Pós-Graduação em Ciências Biológicas (Zoologia) IBB/UNESP - Instituto de Biociências de BotucatuFaculdade de Engenharia de Ilha Solteira - Programa de Pós-Graduação em Ciência e Tecnologia Animal FEIS/UNESP - Universidade Estadual Paulista ‘Júlio de Mesquita Filho’L.I.NEO - Laboratory of Neotropical Ichthyology Departamento de Biologia e Zootecnia UNESP - Universidade Estadual Paulista ‘Júlio de Mesquita Filho’ Câmpus de Ilha SolteiraPrograma de Pós-Graduação em Ciências Biológicas (Zoologia) IBB/UNESP - Instituto de Biociências de BotucatuFaculdade de Engenharia de Ilha Solteira - Programa de Pós-Graduação em Ciência e Tecnologia Animal FEIS/UNESP - Universidade Estadual Paulista ‘Júlio de Mesquita Filho’FAPESP: 2013/24527-8FAPESP: 2014/23379-8FAPESP: 2019/27406-3CNPq: 302108/2015-7CNPq: 305673/2018-1CNPq: 457083/2014-0Universidade Estadual Paulista (UNESP)Quirino, Patricia Postingel [UNESP]Delgado, Maria Luiza Ribeiro [UNESP]Gomes-Silva, Luciane [UNESP]Benevente, Cristiane Fernanda [UNESP]Grigoli-Olivio, Maiara Luzia [UNESP]Bianchini, Bárbara Correa [UNESP]Ninhaus-Silveira, Alexandre [UNESP]Veríssimo-Silveira, Rosicleire [UNESP]2022-04-29T08:37:10Z2022-04-29T08:37:10Z2022-04-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article1706-1726http://dx.doi.org/10.1111/are.15701Aquaculture Research, v. 53, n. 5, p. 1706-1726, 2022.1365-21091355-557Xhttp://hdl.handle.net/11449/23000710.1111/are.157012-s2.0-85120642335Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengAquaculture Researchinfo:eu-repo/semantics/openAccess2024-07-05T19:08:31Zoai:repositorio.unesp.br:11449/230007Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T17:49:11.323973Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Female sex inversion as a reason for an unbalanced sex ratio in the neotropical species Brycon orbignyanus |
title |
Female sex inversion as a reason for an unbalanced sex ratio in the neotropical species Brycon orbignyanus |
spellingShingle |
Female sex inversion as a reason for an unbalanced sex ratio in the neotropical species Brycon orbignyanus Quirino, Patricia Postingel [UNESP] germline epithelium gonadal differentiation histology oogenesis sex inversion spermatogenesis |
title_short |
Female sex inversion as a reason for an unbalanced sex ratio in the neotropical species Brycon orbignyanus |
title_full |
Female sex inversion as a reason for an unbalanced sex ratio in the neotropical species Brycon orbignyanus |
title_fullStr |
Female sex inversion as a reason for an unbalanced sex ratio in the neotropical species Brycon orbignyanus |
title_full_unstemmed |
Female sex inversion as a reason for an unbalanced sex ratio in the neotropical species Brycon orbignyanus |
title_sort |
Female sex inversion as a reason for an unbalanced sex ratio in the neotropical species Brycon orbignyanus |
author |
Quirino, Patricia Postingel [UNESP] |
author_facet |
Quirino, Patricia Postingel [UNESP] Delgado, Maria Luiza Ribeiro [UNESP] Gomes-Silva, Luciane [UNESP] Benevente, Cristiane Fernanda [UNESP] Grigoli-Olivio, Maiara Luzia [UNESP] Bianchini, Bárbara Correa [UNESP] Ninhaus-Silveira, Alexandre [UNESP] Veríssimo-Silveira, Rosicleire [UNESP] |
author_role |
author |
author2 |
Delgado, Maria Luiza Ribeiro [UNESP] Gomes-Silva, Luciane [UNESP] Benevente, Cristiane Fernanda [UNESP] Grigoli-Olivio, Maiara Luzia [UNESP] Bianchini, Bárbara Correa [UNESP] Ninhaus-Silveira, Alexandre [UNESP] Veríssimo-Silveira, Rosicleire [UNESP] |
author2_role |
author author author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (UNESP) |
dc.contributor.author.fl_str_mv |
Quirino, Patricia Postingel [UNESP] Delgado, Maria Luiza Ribeiro [UNESP] Gomes-Silva, Luciane [UNESP] Benevente, Cristiane Fernanda [UNESP] Grigoli-Olivio, Maiara Luzia [UNESP] Bianchini, Bárbara Correa [UNESP] Ninhaus-Silveira, Alexandre [UNESP] Veríssimo-Silveira, Rosicleire [UNESP] |
dc.subject.por.fl_str_mv |
germline epithelium gonadal differentiation histology oogenesis sex inversion spermatogenesis |
topic |
germline epithelium gonadal differentiation histology oogenesis sex inversion spermatogenesis |
description |
The objective of this study was to temporally identify sex differentiation to morphologically characterize the formation of female and male germinal epithelium and verify the occurrence of the sex disproportion reported for this species in aquaculture. Specimens of Brycon orbignyanus cultivated in water recirculation systems with a constant temperature of 27 ± 0.5°C were used. Monthly samplings of B. orbignyanus (n = 15) were performed from two months of age until 1 year of age, and posteriorly isolated sampling was performed on specimens of two and three years of age. The gonads of the specimens were removed and processed for light microscopy. In the beginning, the undifferentiated gonads develop into ovaries (females; at three months of age) and functional testicles (primary males; at five months of age); however, some of the females go through a sex inversion process creating intersex individuals and posteriorly secondary males (at five months of age). Due to the processes of sex inversion and gonadal remodelling, the population sex proportion fluctuates until it is finally established at 1♀:2♂. Females above 15 cm are differentiated, while in males (primary and secondary), differentiation will only occur after the animal reaches 20 cm. At the end of the first year of age, primary males and secondary males reach sexual maturity, while female sexual maturity is only observed at three years of age. |
publishDate |
2022 |
dc.date.none.fl_str_mv |
2022-04-29T08:37:10Z 2022-04-29T08:37:10Z 2022-04-01 |
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/10.1111/are.15701 Aquaculture Research, v. 53, n. 5, p. 1706-1726, 2022. 1365-2109 1355-557X http://hdl.handle.net/11449/230007 10.1111/are.15701 2-s2.0-85120642335 |
url |
http://dx.doi.org/10.1111/are.15701 http://hdl.handle.net/11449/230007 |
identifier_str_mv |
Aquaculture Research, v. 53, n. 5, p. 1706-1726, 2022. 1365-2109 1355-557X 10.1111/are.15701 2-s2.0-85120642335 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Aquaculture Research |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
1706-1726 |
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_ |
1808128862790352896 |