Plasma levels of luteinizing hormone and gonadal maturation of lambari females under different photoperiods

Detalhes bibliográficos
Autor(a) principal: Navarro, Fernanda Keley Silva Pereira
Data de Publicação: 2013
Outros Autores: Navarro, Rodrigo Diana, Murgas, Luis David Solis, Pereira, Marina Apocalypse Nogueira, Hundley, Guilherme Crispim
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UFLA
Texto Completo: http://repositorio.ufla.br/jspui/handle/1/39207
Resumo: The objective of this work was to evaluate the effect of photoperiod on luteinizing hormone (LH) plasma levels and gonadal maturation of lambari females. One hundred and twenty adult lambaris, distributed into 12 aquaria of 20 L each, were randomly subjected to three different treatments, in a completely randomized design, and four replicates. Treatments were photoperiods in hours of light (L) and darkness (D): T1, 0 L:24 D; T2, 12 L:12 D; T3, 24 L:0 D. After 40 days, fish were subjected to fasting for 24 hours and, then, anesthetized. Immediately after slaughter, fish were weighed, and their gonads and livers were removed and weighed. Ovaries were weighed and immersed in Bouin's fixative solution for 24 hours and, then, kept in 70% alcohol until processing the material. Subsequently, the oocyte developmental stage was determined. No significant differences were observed between treatments for final weight, ovary weight, gonadosomatic index (GSI), hepatosomatic index (HSI) and LH levels. In all treatments, lambari females showed maturing ovaries with prevalence of vitellogenic oocytes. Photoperiod does not affect the LH levels and ovarian maturation in lambari females.
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spelling Plasma levels of luteinizing hormone and gonadal maturation of lambari females under different photoperiodsNíveis plasmáticos de hormônio luteinizante e maturação gonadal de fêmeas de lambari sob diferentes fotoperíodosAstyanax bimaculatusNative speciesGonadosomatic indexHepatosomatic indexOogenesisEspécie nativaÍndice gonadossomáticoÍndice hepatossomáticoOogêneseThe objective of this work was to evaluate the effect of photoperiod on luteinizing hormone (LH) plasma levels and gonadal maturation of lambari females. One hundred and twenty adult lambaris, distributed into 12 aquaria of 20 L each, were randomly subjected to three different treatments, in a completely randomized design, and four replicates. Treatments were photoperiods in hours of light (L) and darkness (D): T1, 0 L:24 D; T2, 12 L:12 D; T3, 24 L:0 D. After 40 days, fish were subjected to fasting for 24 hours and, then, anesthetized. Immediately after slaughter, fish were weighed, and their gonads and livers were removed and weighed. Ovaries were weighed and immersed in Bouin's fixative solution for 24 hours and, then, kept in 70% alcohol until processing the material. Subsequently, the oocyte developmental stage was determined. No significant differences were observed between treatments for final weight, ovary weight, gonadosomatic index (GSI), hepatosomatic index (HSI) and LH levels. In all treatments, lambari females showed maturing ovaries with prevalence of vitellogenic oocytes. Photoperiod does not affect the LH levels and ovarian maturation in lambari females.O objetivo deste trabalho foi avaliar o efeito de fotoperíodo nos níveis plasmáticos do hormônio luteinizante (LH) e na maturação gonadal de fêmeas de lambari. Cento e vinte lambaris adultos, distribuídos em 12 aquários de 20 L cada um, em delineamento inteiramente casualizado, foram submetidos a três tratamentos e quatro repetições. Os tratamentos foram fotoperíodos, em horas de luz (L) e escuro (E): T1, 0 L:24 E; T2, 12 L:12 E; T3, 24 L:0 E. Após 40 dias, os peixes foram mantidos em jejum de 24 horas e, em seguida, foram anestesiados. Imediatamente após o abate, os peixes foram pesados, e suas gônadas e fígados foram retirados e pesados. Os ovários foram pesados e imersos em solução fixadora de Bouin por 24 horas e, em seguida, foram mantidos em álcool 70% até o processamento do material. Subsequentemente, o estágio de desenvolvimento dos ovócitos foi determinado. Não foram observadas diferenças significativas entre os tratamentos, quanto a peso final, peso da gônada, índice gonadossomático (IGS), índice hepatossomático (IHS) e níveis de LH. Em todos os tratamentos, as fêmeas de lambari apresentaram ovários em maturação com a prevalência de ovócitos vitelogênicos. O fotoperíodo não influencia os níveis de LH e a maturação ovariana em fêmeas de lambari.Empresa Brasileira de Pesquisa Agropecuária - Embrapa2020-03-06T14:49:09Z2020-03-06T14:49:09Z2013-08info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfNAVARRO, F. K. S. P. et al. Plasma levels of luteinizing hormone and gonadal maturation of lambari females under different photoperiods. Pesquisa Agropecuária Brasileira, Brasília, v. 48, n. 8, p. 1064-1070, ago. 2013.http://repositorio.ufla.br/jspui/handle/1/39207Pesquisa Agropecuária Brasileirareponame:Repositório Institucional da UFLAinstname:Universidade Federal de Lavras (UFLA)instacron:UFLAhttp://creativecommons.org/licenses/by-nc/4.0/info:eu-repo/semantics/openAccessNavarro, Fernanda Keley Silva PereiraNavarro, Rodrigo DianaMurgas, Luis David SolisPereira, Marina Apocalypse NogueiraHundley, Guilherme Crispimeng2020-03-06T14:50:35Zoai:localhost:1/39207Repositório InstitucionalPUBhttp://repositorio.ufla.br/oai/requestnivaldo@ufla.br || repositorio.biblioteca@ufla.bropendoar:2020-03-06T14:50:35Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)false
dc.title.none.fl_str_mv Plasma levels of luteinizing hormone and gonadal maturation of lambari females under different photoperiods
Níveis plasmáticos de hormônio luteinizante e maturação gonadal de fêmeas de lambari sob diferentes fotoperíodos
title Plasma levels of luteinizing hormone and gonadal maturation of lambari females under different photoperiods
spellingShingle Plasma levels of luteinizing hormone and gonadal maturation of lambari females under different photoperiods
Navarro, Fernanda Keley Silva Pereira
Astyanax bimaculatus
Native species
Gonadosomatic index
Hepatosomatic index
Oogenesis
Espécie nativa
Índice gonadossomático
Índice hepatossomático
Oogênese
title_short Plasma levels of luteinizing hormone and gonadal maturation of lambari females under different photoperiods
title_full Plasma levels of luteinizing hormone and gonadal maturation of lambari females under different photoperiods
title_fullStr Plasma levels of luteinizing hormone and gonadal maturation of lambari females under different photoperiods
title_full_unstemmed Plasma levels of luteinizing hormone and gonadal maturation of lambari females under different photoperiods
title_sort Plasma levels of luteinizing hormone and gonadal maturation of lambari females under different photoperiods
author Navarro, Fernanda Keley Silva Pereira
author_facet Navarro, Fernanda Keley Silva Pereira
Navarro, Rodrigo Diana
Murgas, Luis David Solis
Pereira, Marina Apocalypse Nogueira
Hundley, Guilherme Crispim
author_role author
author2 Navarro, Rodrigo Diana
Murgas, Luis David Solis
Pereira, Marina Apocalypse Nogueira
Hundley, Guilherme Crispim
author2_role author
author
author
author
dc.contributor.author.fl_str_mv Navarro, Fernanda Keley Silva Pereira
Navarro, Rodrigo Diana
Murgas, Luis David Solis
Pereira, Marina Apocalypse Nogueira
Hundley, Guilherme Crispim
dc.subject.por.fl_str_mv Astyanax bimaculatus
Native species
Gonadosomatic index
Hepatosomatic index
Oogenesis
Espécie nativa
Índice gonadossomático
Índice hepatossomático
Oogênese
topic Astyanax bimaculatus
Native species
Gonadosomatic index
Hepatosomatic index
Oogenesis
Espécie nativa
Índice gonadossomático
Índice hepatossomático
Oogênese
description The objective of this work was to evaluate the effect of photoperiod on luteinizing hormone (LH) plasma levels and gonadal maturation of lambari females. One hundred and twenty adult lambaris, distributed into 12 aquaria of 20 L each, were randomly subjected to three different treatments, in a completely randomized design, and four replicates. Treatments were photoperiods in hours of light (L) and darkness (D): T1, 0 L:24 D; T2, 12 L:12 D; T3, 24 L:0 D. After 40 days, fish were subjected to fasting for 24 hours and, then, anesthetized. Immediately after slaughter, fish were weighed, and their gonads and livers were removed and weighed. Ovaries were weighed and immersed in Bouin's fixative solution for 24 hours and, then, kept in 70% alcohol until processing the material. Subsequently, the oocyte developmental stage was determined. No significant differences were observed between treatments for final weight, ovary weight, gonadosomatic index (GSI), hepatosomatic index (HSI) and LH levels. In all treatments, lambari females showed maturing ovaries with prevalence of vitellogenic oocytes. Photoperiod does not affect the LH levels and ovarian maturation in lambari females.
publishDate 2013
dc.date.none.fl_str_mv 2013-08
2020-03-06T14:49:09Z
2020-03-06T14:49:09Z
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 NAVARRO, F. K. S. P. et al. Plasma levels of luteinizing hormone and gonadal maturation of lambari females under different photoperiods. Pesquisa Agropecuária Brasileira, Brasília, v. 48, n. 8, p. 1064-1070, ago. 2013.
http://repositorio.ufla.br/jspui/handle/1/39207
identifier_str_mv NAVARRO, F. K. S. P. et al. Plasma levels of luteinizing hormone and gonadal maturation of lambari females under different photoperiods. Pesquisa Agropecuária Brasileira, Brasília, v. 48, n. 8, p. 1064-1070, ago. 2013.
url http://repositorio.ufla.br/jspui/handle/1/39207
dc.language.iso.fl_str_mv eng
language eng
dc.rights.driver.fl_str_mv http://creativecommons.org/licenses/by-nc/4.0/
info:eu-repo/semantics/openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc/4.0/
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Empresa Brasileira de Pesquisa Agropecuária - Embrapa
publisher.none.fl_str_mv Empresa Brasileira de Pesquisa Agropecuária - Embrapa
dc.source.none.fl_str_mv Pesquisa Agropecuária Brasileira
reponame:Repositório Institucional da UFLA
instname:Universidade Federal de Lavras (UFLA)
instacron:UFLA
instname_str Universidade Federal de Lavras (UFLA)
instacron_str UFLA
institution UFLA
reponame_str Repositório Institucional da UFLA
collection Repositório Institucional da UFLA
repository.name.fl_str_mv Repositório Institucional da UFLA - Universidade Federal de Lavras (UFLA)
repository.mail.fl_str_mv nivaldo@ufla.br || repositorio.biblioteca@ufla.br
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