Reproductive biology of Moenkhausia intermedia (Eigenmann) (Pisces, Characiformes) in Itumbiara Reservoir, Goiás, Brazil

Detalhes bibliográficos
Autor(a) principal: Hojo,Renê Eiji Souza
Data de Publicação: 2004
Outros Autores: Santos,Gilmar Bastos, Bazzoli,Nilo
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Revista Brasileira de Zoologia (Online)
Texto Completo: http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752004000300015
Resumo: To study the reproductive biology of Moenkhausia intermedia (Eigenmann, 1908) in Itumbiara reservoir, Paranaíba river, Goiás, Brazil, a total of 301 specimens (237 females and 64 males) were captured quaterly from January to December 1993. The gonadosomatic index of females and males were related to morphologic variations of the gonads in different reproductive cycle stages (RCS). Analysis of RCS frequency and variations in the gonadosomatic index showed that M. intermedia reproduces during the whole year with fractional spawning. The smallest standard length at advanced maturity stage was estimated as 6.6 cm for females and 6.0 cm for males. The stomach repletion and coelomic fat indexes of both sexes reached peak values in the rest stage, suggesting that this species probably store energy in this phase and consume its fat reserve during reproduction. In the Itumbiara reservoir there was female predominance (4:1). Males were smaller than females, indicating sexual dimorphism in M. intermedia.
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spelling Reproductive biology of Moenkhausia intermedia (Eigenmann) (Pisces, Characiformes) in Itumbiara Reservoir, Goiás, BrazilGonadsreproductionsexual dimorphismsexual maturationspawningTo study the reproductive biology of Moenkhausia intermedia (Eigenmann, 1908) in Itumbiara reservoir, Paranaíba river, Goiás, Brazil, a total of 301 specimens (237 females and 64 males) were captured quaterly from January to December 1993. The gonadosomatic index of females and males were related to morphologic variations of the gonads in different reproductive cycle stages (RCS). Analysis of RCS frequency and variations in the gonadosomatic index showed that M. intermedia reproduces during the whole year with fractional spawning. The smallest standard length at advanced maturity stage was estimated as 6.6 cm for females and 6.0 cm for males. The stomach repletion and coelomic fat indexes of both sexes reached peak values in the rest stage, suggesting that this species probably store energy in this phase and consume its fat reserve during reproduction. In the Itumbiara reservoir there was female predominance (4:1). Males were smaller than females, indicating sexual dimorphism in M. intermedia.Sociedade Brasileira de Zoologia2004-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752004000300015Revista Brasileira de Zoologia v.21 n.3 2004reponame:Revista Brasileira de Zoologia (Online)instname:Sociedade Brasileira de Zoologia (SBZ)instacron:SBZ10.1590/S0101-81752004000300015info:eu-repo/semantics/openAccessHojo,Renê Eiji SouzaSantos,Gilmar BastosBazzoli,Niloeng2006-04-27T00:00:00Zoai:scielo:S0101-81752004000300015Revistahttp://calvados.c3sl.ufpr.br/ojs2/index.php/zooONGhttps://old.scielo.br/oai/scielo-oai.php||sbz@bio.ufpr.br1806-969X0101-8175opendoar:2006-04-27T00:00Revista Brasileira de Zoologia (Online) - Sociedade Brasileira de Zoologia (SBZ)false
dc.title.none.fl_str_mv Reproductive biology of Moenkhausia intermedia (Eigenmann) (Pisces, Characiformes) in Itumbiara Reservoir, Goiás, Brazil
title Reproductive biology of Moenkhausia intermedia (Eigenmann) (Pisces, Characiformes) in Itumbiara Reservoir, Goiás, Brazil
spellingShingle Reproductive biology of Moenkhausia intermedia (Eigenmann) (Pisces, Characiformes) in Itumbiara Reservoir, Goiás, Brazil
Hojo,Renê Eiji Souza
Gonads
reproduction
sexual dimorphism
sexual maturation
spawning
title_short Reproductive biology of Moenkhausia intermedia (Eigenmann) (Pisces, Characiformes) in Itumbiara Reservoir, Goiás, Brazil
title_full Reproductive biology of Moenkhausia intermedia (Eigenmann) (Pisces, Characiformes) in Itumbiara Reservoir, Goiás, Brazil
title_fullStr Reproductive biology of Moenkhausia intermedia (Eigenmann) (Pisces, Characiformes) in Itumbiara Reservoir, Goiás, Brazil
title_full_unstemmed Reproductive biology of Moenkhausia intermedia (Eigenmann) (Pisces, Characiformes) in Itumbiara Reservoir, Goiás, Brazil
title_sort Reproductive biology of Moenkhausia intermedia (Eigenmann) (Pisces, Characiformes) in Itumbiara Reservoir, Goiás, Brazil
author Hojo,Renê Eiji Souza
author_facet Hojo,Renê Eiji Souza
Santos,Gilmar Bastos
Bazzoli,Nilo
author_role author
author2 Santos,Gilmar Bastos
Bazzoli,Nilo
author2_role author
author
dc.contributor.author.fl_str_mv Hojo,Renê Eiji Souza
Santos,Gilmar Bastos
Bazzoli,Nilo
dc.subject.por.fl_str_mv Gonads
reproduction
sexual dimorphism
sexual maturation
spawning
topic Gonads
reproduction
sexual dimorphism
sexual maturation
spawning
description To study the reproductive biology of Moenkhausia intermedia (Eigenmann, 1908) in Itumbiara reservoir, Paranaíba river, Goiás, Brazil, a total of 301 specimens (237 females and 64 males) were captured quaterly from January to December 1993. The gonadosomatic index of females and males were related to morphologic variations of the gonads in different reproductive cycle stages (RCS). Analysis of RCS frequency and variations in the gonadosomatic index showed that M. intermedia reproduces during the whole year with fractional spawning. The smallest standard length at advanced maturity stage was estimated as 6.6 cm for females and 6.0 cm for males. The stomach repletion and coelomic fat indexes of both sexes reached peak values in the rest stage, suggesting that this species probably store energy in this phase and consume its fat reserve during reproduction. In the Itumbiara reservoir there was female predominance (4:1). Males were smaller than females, indicating sexual dimorphism in M. intermedia.
publishDate 2004
dc.date.none.fl_str_mv 2004-09-01
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752004000300015
url http://old.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752004000300015
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv 10.1590/S0101-81752004000300015
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv text/html
dc.publisher.none.fl_str_mv Sociedade Brasileira de Zoologia
publisher.none.fl_str_mv Sociedade Brasileira de Zoologia
dc.source.none.fl_str_mv Revista Brasileira de Zoologia v.21 n.3 2004
reponame:Revista Brasileira de Zoologia (Online)
instname:Sociedade Brasileira de Zoologia (SBZ)
instacron:SBZ
instname_str Sociedade Brasileira de Zoologia (SBZ)
instacron_str SBZ
institution SBZ
reponame_str Revista Brasileira de Zoologia (Online)
collection Revista Brasileira de Zoologia (Online)
repository.name.fl_str_mv Revista Brasileira de Zoologia (Online) - Sociedade Brasileira de Zoologia (SBZ)
repository.mail.fl_str_mv ||sbz@bio.ufpr.br
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