Plasma levels of luteinizing hormone and gonadal maturation of lambari females under different photoperiods
Autor(a) principal: | |
---|---|
Data de Publicação: | 2013 |
Outros Autores: | , , , |
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. |
id |
UFLA_2c1410696269bd10d2f6db262e7bfb67 |
---|---|
oai_identifier_str |
oai:localhost:1/39207 |
network_acronym_str |
UFLA |
network_name_str |
Repositório Institucional da UFLA |
repository_id_str |
|
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 |
_version_ |
1815439209146613760 |