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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Main Authors: Fernanda Keley Silva Pereira Navarro, Rodrigo Diana Navarro, Luis David Solis Murgas, Marina Apocalypse Nogueira Pereira, Guilherme Crispim Hundley
Format: Article
Language:English
Published: Embrapa Informação Tecnológica 2013-08-01
Series:Pesquisa Agropecuária Brasileira
Subjects:
Online Access:http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-204X2013000800039&lng=en&tlng=en
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spelling 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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