Condition factor and reproductive aspects of females of Pimelodella cf. gracilis (Osteichthyes, Siluriformes, Pimelodidae) in Amambai River, Mato Grosso do Sul State - DOI: 10.4025/actascibiolsci.v28i2.1030

Detalhes bibliográficos
Autor(a) principal: Santos, Silvana Lima dos
Data de Publicação: 2008
Outros Autores: Viana, Lucilene Finoto, Lima-Junior, Sidnei Eduardo
Tipo de documento: Artigo
Idioma: por
Título da fonte: Acta Scientiarum Biological Sciences
Texto Completo: http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1030
Resumo: The aim of this study is to describe the seasonal variations of condition factor and of the gonadal development cycle of Pimelodella cf. gracilis in Amambai River (MS, Brazil). The length and weight of 232 individuals were measured to calculate the Allometric Condition Factor. For the females (n=162), we also obtained the ovarian weight and the gonadal maturity stages in order to calculate the GSI and the relative frequency (%) of this stages at each season of the year. Results indicate that the highest GSI values were registered in spring and summer. Thus, we concluded that the spawning season of this species occurs between October and April. However, it was not possible to identify more precisely when this event occurs. The highest values of condition factor were observed in summer, as a probable consequence of the more intensive feeding activity that individuals demonstrate during the spring.
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spelling Condition factor and reproductive aspects of females of Pimelodella cf. gracilis (Osteichthyes, Siluriformes, Pimelodidae) in Amambai River, Mato Grosso do Sul State - DOI: 10.4025/actascibiolsci.v28i2.1030Fator de condição e aspectos reprodutivos de fêmeas de Pimelodella cf. gracilis (Osteichthyes, Siluriformes, Pimelodidae) no rio Amambai, de Mato Grosso do Sul - DOI: 10.4025/actascibiolsci.v28i2.1030Pimelodella cf gracilisépoca de desovafator de condiçãoreproduçãorio Amambai2.05.00.00-9 EcologiaThe aim of this study is to describe the seasonal variations of condition factor and of the gonadal development cycle of Pimelodella cf. gracilis in Amambai River (MS, Brazil). The length and weight of 232 individuals were measured to calculate the Allometric Condition Factor. For the females (n=162), we also obtained the ovarian weight and the gonadal maturity stages in order to calculate the GSI and the relative frequency (%) of this stages at each season of the year. Results indicate that the highest GSI values were registered in spring and summer. Thus, we concluded that the spawning season of this species occurs between October and April. However, it was not possible to identify more precisely when this event occurs. The highest values of condition factor were observed in summer, as a probable consequence of the more intensive feeding activity that individuals demonstrate during the spring.O objetivo deste trabalho é descrever a variação sazonal do fator de condição e do ciclo de desenvolvimento gonadal de Pimelodella cf. gracilis no rio Amambai, Estado de Mato Grosso do Sul. O comprimento e o peso de 232 indivíduos foram obtidos para cálculo do Fator de Condição Alométrico. Para as fêmeas (n=162), obtivemos, ainda, o peso e o estádio de maturação dos ovários, para cálculo do IGS e da freqüência percentual desses estádios em cada estação do ano. Os resultados obtidos indicam que os maiores valores de IGS correspondem às estações primavera e verão. Com base nisso, conclui-se que o período de desova da espécie está compreendido entre os meses de outubro e abril, embora não tenha sido possível determinar com maior precisão quando esse evento ocorre. Os maiores valores do fator de condição foram observados no verão, como possível conseqüência da maior atividade alimentar que os indivíduos apresentaram durante a primavera.Universidade Estadual De Maringá2008-03-07info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/103010.4025/actascibiolsci.v28i2.1030Acta Scientiarum. Biological Sciences; Vol 28 No 2 (2006); 129-134Acta Scientiarum. Biological Sciences; v. 28 n. 2 (2006); 129-1341807-863X1679-9283reponame:Acta Scientiarum Biological Sciencesinstname:Universidade Estadual de Maringá (UEM)instacron:UEMporhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1030/509Santos, Silvana Lima dosViana, Lucilene FinotoLima-Junior, Sidnei Eduardoinfo:eu-repo/semantics/openAccess2022-11-23T17:33:03Zoai:periodicos.uem.br/ojs:article/1030Revistahttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSciPUBhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/oai||actabiol@uem.br1807-863X1679-9283opendoar:2022-11-23T17:33:03Acta Scientiarum Biological Sciences - Universidade Estadual de Maringá (UEM)false
dc.title.none.fl_str_mv Condition factor and reproductive aspects of females of Pimelodella cf. gracilis (Osteichthyes, Siluriformes, Pimelodidae) in Amambai River, Mato Grosso do Sul State - DOI: 10.4025/actascibiolsci.v28i2.1030
Fator de condição e aspectos reprodutivos de fêmeas de Pimelodella cf. gracilis (Osteichthyes, Siluriformes, Pimelodidae) no rio Amambai, de Mato Grosso do Sul - DOI: 10.4025/actascibiolsci.v28i2.1030
title Condition factor and reproductive aspects of females of Pimelodella cf. gracilis (Osteichthyes, Siluriformes, Pimelodidae) in Amambai River, Mato Grosso do Sul State - DOI: 10.4025/actascibiolsci.v28i2.1030
spellingShingle Condition factor and reproductive aspects of females of Pimelodella cf. gracilis (Osteichthyes, Siluriformes, Pimelodidae) in Amambai River, Mato Grosso do Sul State - DOI: 10.4025/actascibiolsci.v28i2.1030
Santos, Silvana Lima dos
Pimelodella cf gracilis
época de desova
fator de condição
reprodução
rio Amambai
2.05.00.00-9 Ecologia
title_short Condition factor and reproductive aspects of females of Pimelodella cf. gracilis (Osteichthyes, Siluriformes, Pimelodidae) in Amambai River, Mato Grosso do Sul State - DOI: 10.4025/actascibiolsci.v28i2.1030
title_full Condition factor and reproductive aspects of females of Pimelodella cf. gracilis (Osteichthyes, Siluriformes, Pimelodidae) in Amambai River, Mato Grosso do Sul State - DOI: 10.4025/actascibiolsci.v28i2.1030
title_fullStr Condition factor and reproductive aspects of females of Pimelodella cf. gracilis (Osteichthyes, Siluriformes, Pimelodidae) in Amambai River, Mato Grosso do Sul State - DOI: 10.4025/actascibiolsci.v28i2.1030
title_full_unstemmed Condition factor and reproductive aspects of females of Pimelodella cf. gracilis (Osteichthyes, Siluriformes, Pimelodidae) in Amambai River, Mato Grosso do Sul State - DOI: 10.4025/actascibiolsci.v28i2.1030
title_sort Condition factor and reproductive aspects of females of Pimelodella cf. gracilis (Osteichthyes, Siluriformes, Pimelodidae) in Amambai River, Mato Grosso do Sul State - DOI: 10.4025/actascibiolsci.v28i2.1030
author Santos, Silvana Lima dos
author_facet Santos, Silvana Lima dos
Viana, Lucilene Finoto
Lima-Junior, Sidnei Eduardo
author_role author
author2 Viana, Lucilene Finoto
Lima-Junior, Sidnei Eduardo
author2_role author
author
dc.contributor.author.fl_str_mv Santos, Silvana Lima dos
Viana, Lucilene Finoto
Lima-Junior, Sidnei Eduardo
dc.subject.por.fl_str_mv Pimelodella cf gracilis
época de desova
fator de condição
reprodução
rio Amambai
2.05.00.00-9 Ecologia
topic Pimelodella cf gracilis
época de desova
fator de condição
reprodução
rio Amambai
2.05.00.00-9 Ecologia
description The aim of this study is to describe the seasonal variations of condition factor and of the gonadal development cycle of Pimelodella cf. gracilis in Amambai River (MS, Brazil). The length and weight of 232 individuals were measured to calculate the Allometric Condition Factor. For the females (n=162), we also obtained the ovarian weight and the gonadal maturity stages in order to calculate the GSI and the relative frequency (%) of this stages at each season of the year. Results indicate that the highest GSI values were registered in spring and summer. Thus, we concluded that the spawning season of this species occurs between October and April. However, it was not possible to identify more precisely when this event occurs. The highest values of condition factor were observed in summer, as a probable consequence of the more intensive feeding activity that individuals demonstrate during the spring.
publishDate 2008
dc.date.none.fl_str_mv 2008-03-07
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1030
10.4025/actascibiolsci.v28i2.1030
url http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1030
identifier_str_mv 10.4025/actascibiolsci.v28i2.1030
dc.language.iso.fl_str_mv por
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dc.relation.none.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1030/509
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.publisher.none.fl_str_mv Universidade Estadual De Maringá
publisher.none.fl_str_mv Universidade Estadual De Maringá
dc.source.none.fl_str_mv Acta Scientiarum. Biological Sciences; Vol 28 No 2 (2006); 129-134
Acta Scientiarum. Biological Sciences; v. 28 n. 2 (2006); 129-134
1807-863X
1679-9283
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instname:Universidade Estadual de Maringá (UEM)
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