Plasma levels of luteinizing hormone and gonadal maturation of lambari females under different photoperiods
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 compl...
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Embrapa Informação Tecnológica
2013-08-01
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doaj-7e37da04f90f4f39b6efed8c8c37b2ea2020-11-24T23:03:30ZengEmbrapa Informação TecnológicaPesquisa Agropecuária Brasileira1678-39212013-08-014881064107010.1590/S0100-204X2013000800036S0100-204X2013000800039Plasma levels of luteinizing hormone and gonadal maturation of lambari females under different photoperiodsFernanda Keley Silva Pereira Navarro0Rodrigo Diana Navarro1Luis David Solis Murgas2Marina Apocalypse Nogueira Pereira3Guilherme Crispim Hundley4Universidade de BrasíliaUniversidade de BrasíliaUniversidade Federal de LavrasUniversidade Federal de LavrasUniversidade de BrasíliaThe 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.http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000800039&lng=en&tlng=enAstyanax bimaculatusespécie nativaíndice gonadossomáticoíndice hepatossomáticooogênese |
collection |
DOAJ |
language |
English |
format |
Article |
sources |
DOAJ |
author |
Fernanda Keley Silva Pereira Navarro Rodrigo Diana Navarro Luis David Solis Murgas Marina Apocalypse Nogueira Pereira Guilherme Crispim Hundley |
spellingShingle |
Fernanda Keley Silva Pereira Navarro Rodrigo Diana Navarro Luis David Solis Murgas Marina Apocalypse Nogueira Pereira Guilherme Crispim Hundley Plasma levels of luteinizing hormone and gonadal maturation of lambari females under different photoperiods Pesquisa Agropecuária Brasileira Astyanax bimaculatus espécie nativa índice gonadossomático índice hepatossomático oogênese |
author_facet |
Fernanda Keley Silva Pereira Navarro Rodrigo Diana Navarro Luis David Solis Murgas Marina Apocalypse Nogueira Pereira Guilherme Crispim Hundley |
author_sort |
Fernanda Keley Silva Pereira Navarro |
title |
Plasma levels of luteinizing hormone and gonadal maturation of lambari females under different photoperiods |
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 |
publisher |
Embrapa Informação Tecnológica |
series |
Pesquisa Agropecuária Brasileira |
issn |
1678-3921 |
publishDate |
2013-08-01 |
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. |
topic |
Astyanax bimaculatus espécie nativa índice gonadossomático índice hepatossomático oogênese |
url |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000800039&lng=en&tlng=en |
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