Morphometry of upper Paraná river freshwater stingrays (Chondrichthyes, Potamotrygonidae) - DOI: 10.4025/actascibiolsci.v29i4.885

Detalhes bibliográficos
Autor(a) principal: Silva, Antonio Guilherme Cândido da
Data de Publicação: 2008
Outros Autores: Goulart, Erivelto
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/885
Resumo: Potamotrygonidae is the only extant chondrichthyan group restricted exclusively to freshwater. This family invaded the Upper Paraná river system after the closing of Itaipu Dam. This study aimed to identify morphometric differences between Potamotrygon cf. motoro (Natterer in Müller & Henle, 1841) and Potamotrygon falkneri Castex & Maciel, 1963 sampled in that area, and estimate male size at gonadal maturation. P. falkneri and P. cf. motoro males reach gonadal maturation at 26 cm and 23 cm disc width, respectively. Comparing both species, P. cf. motoro presented larger tail, spiracles and distance between nostrils. Lateral small stings on tails of P. falkneri females were observed as secondary sexual dimorphism. Further studies on functional morphology and ecomorphology may point the meaning of morphometric differences to these species’ ecological interactions.
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spelling Morphometry of upper Paraná river freshwater stingrays (Chondrichthyes, Potamotrygonidae) - DOI: 10.4025/actascibiolsci.v29i4.885Morfometria de raias continentais (Chondrichthyes, Potamotrygonidae) do alto rio Paraná, Brasil - DOI: 10.4025/actascibiolsci.v29i4.885MyliobatiformesPotamotrygon cf. motoroPotamotrygon falkneri2.05.00.00-9 EcologiaPotamotrygonidae is the only extant chondrichthyan group restricted exclusively to freshwater. This family invaded the Upper Paraná river system after the closing of Itaipu Dam. This study aimed to identify morphometric differences between Potamotrygon cf. motoro (Natterer in Müller & Henle, 1841) and Potamotrygon falkneri Castex & Maciel, 1963 sampled in that area, and estimate male size at gonadal maturation. P. falkneri and P. cf. motoro males reach gonadal maturation at 26 cm and 23 cm disc width, respectively. Comparing both species, P. cf. motoro presented larger tail, spiracles and distance between nostrils. Lateral small stings on tails of P. falkneri females were observed as secondary sexual dimorphism. Further studies on functional morphology and ecomorphology may point the meaning of morphometric differences to these species’ ecological interactions.Potamotrygonidae constitui o único grupo recente de Chondrichthyes cujo habitat está restrito, exclusivamente, a águas continentais. Na planície de inundação do Alto rio Paraná, espécies desta família estabeleceram-se após o fechamento das comportas da usina hidrelétrica de Itaipu, a jusante. O objetivo deste trabalho foi, utilizando medidas corporais, identificar diferenças morfométricas entre indivíduos de Potamotrygon cf. motoro (Natterer in Müller & Henle, 1841) e Potamotrygon falkneri Castex & Maciel, 1963 capturados nesta região, bem como estimar o tamanho com que machos destas espécies atingem a maturidade gonadal. Machos de P. falkneri e P. cf. motoro das populações avaliadas atingem a maturidade gonadal com largura do disco variando em torno de 26 cm e 23 cm, respectivamente. Na comparação das espécies, P. cf. motoro apresentou maior distância proporcional entre as narinas e maior comprimento proporcional da cauda e dos espiráculos. Identificou-se dimorfismo sexual secundário para P. falkneri, consistindo da presença de fileiras laterais de espinhos na cauda das fêmeas. Estudos futuros de morfologia funcional e ecomorfologia poderão esclarecer o significado das diferenças morfométricas para o modo de vida destas espécies.Universidade Estadual De Maringá2008-02-21info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/88510.4025/actascibiolsci.v29i4.885Acta Scientiarum. Biological Sciences; Vol 29 No 4 (2007); 413-419Acta Scientiarum. Biological Sciences; v. 29 n. 4 (2007); 413-4191807-863X1679-9283reponame:Acta Scientiarum Biological Sciencesinstname:Universidade Estadual de Maringá (UEM)instacron:UEMporhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/885/431Silva, Antonio Guilherme Cândido daGoulart, Eriveltoinfo:eu-repo/semantics/openAccess2022-11-23T17:33:02Zoai:periodicos.uem.br/ojs:article/885Revistahttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSciPUBhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/oai||actabiol@uem.br1807-863X1679-9283opendoar:2022-11-23T17:33:02Acta Scientiarum Biological Sciences - Universidade Estadual de Maringá (UEM)false
dc.title.none.fl_str_mv Morphometry of upper Paraná river freshwater stingrays (Chondrichthyes, Potamotrygonidae) - DOI: 10.4025/actascibiolsci.v29i4.885
Morfometria de raias continentais (Chondrichthyes, Potamotrygonidae) do alto rio Paraná, Brasil - DOI: 10.4025/actascibiolsci.v29i4.885
title Morphometry of upper Paraná river freshwater stingrays (Chondrichthyes, Potamotrygonidae) - DOI: 10.4025/actascibiolsci.v29i4.885
spellingShingle Morphometry of upper Paraná river freshwater stingrays (Chondrichthyes, Potamotrygonidae) - DOI: 10.4025/actascibiolsci.v29i4.885
Silva, Antonio Guilherme Cândido da
Myliobatiformes
Potamotrygon cf. motoro
Potamotrygon falkneri
2.05.00.00-9 Ecologia
title_short Morphometry of upper Paraná river freshwater stingrays (Chondrichthyes, Potamotrygonidae) - DOI: 10.4025/actascibiolsci.v29i4.885
title_full Morphometry of upper Paraná river freshwater stingrays (Chondrichthyes, Potamotrygonidae) - DOI: 10.4025/actascibiolsci.v29i4.885
title_fullStr Morphometry of upper Paraná river freshwater stingrays (Chondrichthyes, Potamotrygonidae) - DOI: 10.4025/actascibiolsci.v29i4.885
title_full_unstemmed Morphometry of upper Paraná river freshwater stingrays (Chondrichthyes, Potamotrygonidae) - DOI: 10.4025/actascibiolsci.v29i4.885
title_sort Morphometry of upper Paraná river freshwater stingrays (Chondrichthyes, Potamotrygonidae) - DOI: 10.4025/actascibiolsci.v29i4.885
author Silva, Antonio Guilherme Cândido da
author_facet Silva, Antonio Guilherme Cândido da
Goulart, Erivelto
author_role author
author2 Goulart, Erivelto
author2_role author
dc.contributor.author.fl_str_mv Silva, Antonio Guilherme Cândido da
Goulart, Erivelto
dc.subject.por.fl_str_mv Myliobatiformes
Potamotrygon cf. motoro
Potamotrygon falkneri
2.05.00.00-9 Ecologia
topic Myliobatiformes
Potamotrygon cf. motoro
Potamotrygon falkneri
2.05.00.00-9 Ecologia
description Potamotrygonidae is the only extant chondrichthyan group restricted exclusively to freshwater. This family invaded the Upper Paraná river system after the closing of Itaipu Dam. This study aimed to identify morphometric differences between Potamotrygon cf. motoro (Natterer in Müller & Henle, 1841) and Potamotrygon falkneri Castex & Maciel, 1963 sampled in that area, and estimate male size at gonadal maturation. P. falkneri and P. cf. motoro males reach gonadal maturation at 26 cm and 23 cm disc width, respectively. Comparing both species, P. cf. motoro presented larger tail, spiracles and distance between nostrils. Lateral small stings on tails of P. falkneri females were observed as secondary sexual dimorphism. Further studies on functional morphology and ecomorphology may point the meaning of morphometric differences to these species’ ecological interactions.
publishDate 2008
dc.date.none.fl_str_mv 2008-02-21
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/885
10.4025/actascibiolsci.v29i4.885
url http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/885
identifier_str_mv 10.4025/actascibiolsci.v29i4.885
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/885/431
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 29 No 4 (2007); 413-419
Acta Scientiarum. Biological Sciences; v. 29 n. 4 (2007); 413-419
1807-863X
1679-9283
reponame:Acta Scientiarum Biological Sciences
instname:Universidade Estadual de Maringá (UEM)
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instname_str Universidade Estadual de Maringá (UEM)
instacron_str UEM
institution UEM
reponame_str Acta Scientiarum Biological Sciences
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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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