Food’s and reproductive biology of Oligosarcus jenynsii in the upper Uruguay river - Brazil - DOI: 10.4025/actascibiolsci.v26i2.1632

Detalhes bibliográficos
Autor(a) principal: Silva, Samara Hermes
Data de Publicação: 2008
Outros Autores: Meurer, Samira, Zaniboni Filho, Evoy
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/1632
Resumo: The aim of this study was to analyze feeding habit and reproductive aspects of Oligosarcus jenynsii of the upper Uruguay river. A total of 246 specimens of O. jenynsii were captured: 127 were females, 78 were males and the sex of 41 specimens could not be identified. Total length and weight ranged from 35 to 310mm and 0.3 to 330g, respectively. Highest average replection index values were observed during autumn (1.9% ± 1.4). The species was carnivorous with a tendency to piscivory. The sex ratio was 1.6 female: 1 male. According to variations of average gonadosomatic index, the frequency distribution of maturity stages, and the relative distribution of oocyte diameter, O. jenynsii presents a multiple spawning, breeding from winter to spring. Size at maturity was estimated as 164mm for both males and females. The absolute fecundity average was 20,727
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spelling Food’s and reproductive biology of Oligosarcus jenynsii in the upper Uruguay river - Brazil - DOI: 10.4025/actascibiolsci.v26i2.1632Biologia alimentar e reprodutiva do peixe-cachorro (Oligosarcus Jenynsii Günther, 1864) na região do alto rio Uruguai - Brasil - DOI: 10.4025/actascibiolsci.v26i2.1632Oligosarcus jenynsiialimentaçãoreproduçãobiologiario Uruguai2.01.00.00-0 Biologia GeralThe aim of this study was to analyze feeding habit and reproductive aspects of Oligosarcus jenynsii of the upper Uruguay river. A total of 246 specimens of O. jenynsii were captured: 127 were females, 78 were males and the sex of 41 specimens could not be identified. Total length and weight ranged from 35 to 310mm and 0.3 to 330g, respectively. Highest average replection index values were observed during autumn (1.9% ± 1.4). The species was carnivorous with a tendency to piscivory. The sex ratio was 1.6 female: 1 male. According to variations of average gonadosomatic index, the frequency distribution of maturity stages, and the relative distribution of oocyte diameter, O. jenynsii presents a multiple spawning, breeding from winter to spring. Size at maturity was estimated as 164mm for both males and females. The absolute fecundity average was 20,727Este trabalho teve como objetivo estudar a biologia alimentar e reprodutiva do peixe-cachorro, Oligosarcus jenynsii, na região do alto rio Uruguai. Foram capturados 246 exemplares, dos quais 127 eram fêmeas, 78 eram machos e 41 foram identificados como sendo de “sexo indefinido”. O comprimento e peso totais variaram de 35 a 310mm e 0,3 a 330g, respectivamente. O maior valor de índice de repleção médio (1,9% ±1,4%) foi observado durante o outono. No que se refere a composição da dieta alimentar, o peixecachorro apresentou-se como carnívoro com tendência à piscivoria. A proporção sexual encontrada foi de 1,6 fêmea: 1 macho. Quanto à dinâmica reprodutiva, o peixe-cachorro apresenta desova parcelada, com maiores valores de índice gonadossomático observados no inverno (4,4%) e na primavera (2,5%). O comprimento da primeira maturação gonadal observado para O. jenynsii foi de aproximadamente 164mm para ambos os sexos. A fecundidade absoluta média encontrada foi de 20.727 ovócitosUniversidade Estadual De Maringá2008-04-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/163210.4025/actascibiolsci.v26i2.1632Acta Scientiarum. Biological Sciences; Vol 26 No 2 (2004); 175-179Acta Scientiarum. Biological Sciences; v. 26 n. 2 (2004); 175-1791807-863X1679-9283reponame:Acta Scientiarum Biological Sciencesinstname:Universidade Estadual de Maringá (UEM)instacron:UEMporhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1632/982Silva, Samara HermesMeurer, SamiraZaniboni Filho, Evoyinfo:eu-repo/semantics/openAccess2022-11-23T17:33:14Zoai:periodicos.uem.br/ojs:article/1632Revistahttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSciPUBhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/oai||actabiol@uem.br1807-863X1679-9283opendoar:2022-11-23T17:33:14Acta Scientiarum Biological Sciences - Universidade Estadual de Maringá (UEM)false
dc.title.none.fl_str_mv Food’s and reproductive biology of Oligosarcus jenynsii in the upper Uruguay river - Brazil - DOI: 10.4025/actascibiolsci.v26i2.1632
Biologia alimentar e reprodutiva do peixe-cachorro (Oligosarcus Jenynsii Günther, 1864) na região do alto rio Uruguai - Brasil - DOI: 10.4025/actascibiolsci.v26i2.1632
title Food’s and reproductive biology of Oligosarcus jenynsii in the upper Uruguay river - Brazil - DOI: 10.4025/actascibiolsci.v26i2.1632
spellingShingle Food’s and reproductive biology of Oligosarcus jenynsii in the upper Uruguay river - Brazil - DOI: 10.4025/actascibiolsci.v26i2.1632
Silva, Samara Hermes
Oligosarcus jenynsii
alimentação
reprodução
biologia
rio Uruguai
2.01.00.00-0 Biologia Geral
title_short Food’s and reproductive biology of Oligosarcus jenynsii in the upper Uruguay river - Brazil - DOI: 10.4025/actascibiolsci.v26i2.1632
title_full Food’s and reproductive biology of Oligosarcus jenynsii in the upper Uruguay river - Brazil - DOI: 10.4025/actascibiolsci.v26i2.1632
title_fullStr Food’s and reproductive biology of Oligosarcus jenynsii in the upper Uruguay river - Brazil - DOI: 10.4025/actascibiolsci.v26i2.1632
title_full_unstemmed Food’s and reproductive biology of Oligosarcus jenynsii in the upper Uruguay river - Brazil - DOI: 10.4025/actascibiolsci.v26i2.1632
title_sort Food’s and reproductive biology of Oligosarcus jenynsii in the upper Uruguay river - Brazil - DOI: 10.4025/actascibiolsci.v26i2.1632
author Silva, Samara Hermes
author_facet Silva, Samara Hermes
Meurer, Samira
Zaniboni Filho, Evoy
author_role author
author2 Meurer, Samira
Zaniboni Filho, Evoy
author2_role author
author
dc.contributor.author.fl_str_mv Silva, Samara Hermes
Meurer, Samira
Zaniboni Filho, Evoy
dc.subject.por.fl_str_mv Oligosarcus jenynsii
alimentação
reprodução
biologia
rio Uruguai
2.01.00.00-0 Biologia Geral
topic Oligosarcus jenynsii
alimentação
reprodução
biologia
rio Uruguai
2.01.00.00-0 Biologia Geral
description The aim of this study was to analyze feeding habit and reproductive aspects of Oligosarcus jenynsii of the upper Uruguay river. A total of 246 specimens of O. jenynsii were captured: 127 were females, 78 were males and the sex of 41 specimens could not be identified. Total length and weight ranged from 35 to 310mm and 0.3 to 330g, respectively. Highest average replection index values were observed during autumn (1.9% ± 1.4). The species was carnivorous with a tendency to piscivory. The sex ratio was 1.6 female: 1 male. According to variations of average gonadosomatic index, the frequency distribution of maturity stages, and the relative distribution of oocyte diameter, O. jenynsii presents a multiple spawning, breeding from winter to spring. Size at maturity was estimated as 164mm for both males and females. The absolute fecundity average was 20,727
publishDate 2008
dc.date.none.fl_str_mv 2008-04-01
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/1632
10.4025/actascibiolsci.v26i2.1632
url http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1632
identifier_str_mv 10.4025/actascibiolsci.v26i2.1632
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/1632/982
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 26 No 2 (2004); 175-179
Acta Scientiarum. Biological Sciences; v. 26 n. 2 (2004); 175-179
1807-863X
1679-9283
reponame:Acta Scientiarum Biological Sciences
instname:Universidade Estadual de Maringá (UEM)
instacron:UEM
instname_str Universidade Estadual de Maringá (UEM)
instacron_str UEM
institution UEM
reponame_str Acta Scientiarum Biological Sciences
collection Acta Scientiarum Biological Sciences
repository.name.fl_str_mv Acta Scientiarum Biological Sciences - Universidade Estadual de Maringá (UEM)
repository.mail.fl_str_mv ||actabiol@uem.br
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