EXCLUSIVE CYTOTYPE IN Parauchenipterus galeatus (SILURIFORMES, AUCHENIPTERIDAE) IN THE EASTERN NORTH-EAST ATLANTIC BASIN OF BRAZIL: INDICATION OF A SPECIES COMPLEX

Detalhes bibliográficos
Autor(a) principal: Araújo, Washington Candeia
Data de Publicação: 2013
Outros Autores: Molina, Wagner Franco
Tipo de documento: Artigo
Idioma: por
Título da fonte: Biota Amazônia
Texto Completo: https://periodicos.unifap.br/index.php/biota/article/view/643
Resumo: Endemisms among the ichthyofauna of the hydrographic Brazilian basins has been showed frequent, mainly due to vicariance or dispersal processes. Several species constitute genuinely complexes of cryptic species, in clear process of differentiation. Cytogenetic analysis performed in the catfish, Parauchenipterus galeatus, in the basin of the Eastern North-east Atlantic basin of Brazil revealed a karyotype with 2n = 58 (24m+16sm+10st+8a; NF=108), with unique NORs sites located in the distal region of a submetacentric chromosome pair and with reduced heterochromatic regions. This standard karyotype shown differentiated from other already described for species of others basins. The distribution of heterochromatin associated with structural variations of karyotype represent important evidences of cytogenetic differentiation of P. galeatus among the different Brazilian basins. Considering the time of divergence between large basins, it is possible that the cytogenetic differences found may represent in some cases effective post-zygotic reproductive barriers. The diversity of the species karyotype supports the existence of a species complex.Keywords: Cangati; cryptic species; fish cytogenetics; allopatric speciation.
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spelling EXCLUSIVE CYTOTYPE IN Parauchenipterus galeatus (SILURIFORMES, AUCHENIPTERIDAE) IN THE EASTERN NORTH-EAST ATLANTIC BASIN OF BRAZIL: INDICATION OF A SPECIES COMPLEXCITÓTIPO EXCLUSIVO PARA Parauchenipterus galeatus (SILURIFORMES, AUCHENIPTERIDAE) NA BACIA DO ATLÂNTICO NE ORIENTAL DO BRASIL: INDICAÇÕES DE UM COMPLEXO DE ESPÉCIES.Endemisms among the ichthyofauna of the hydrographic Brazilian basins has been showed frequent, mainly due to vicariance or dispersal processes. Several species constitute genuinely complexes of cryptic species, in clear process of differentiation. Cytogenetic analysis performed in the catfish, Parauchenipterus galeatus, in the basin of the Eastern North-east Atlantic basin of Brazil revealed a karyotype with 2n = 58 (24m+16sm+10st+8a; NF=108), with unique NORs sites located in the distal region of a submetacentric chromosome pair and with reduced heterochromatic regions. This standard karyotype shown differentiated from other already described for species of others basins. The distribution of heterochromatin associated with structural variations of karyotype represent important evidences of cytogenetic differentiation of P. galeatus among the different Brazilian basins. Considering the time of divergence between large basins, it is possible that the cytogenetic differences found may represent in some cases effective post-zygotic reproductive barriers. The diversity of the species karyotype supports the existence of a species complex.Keywords: Cangati; cryptic species; fish cytogenetics; allopatric speciation.Endemismos entre as ictiofaunas das bacias hidrográficas brasileiras vêm se mostrando frequentes, principalmente decorrentes de vicariância ou dispersão. Diversas espécies constituem verdadeiramente complexos de espécies crípticas, em franco processo de diferenciação. Análises citogenéticas realizadas no bagre, Parauchenipterus galeatus, da bacia hidrográfica do NE Oriental do Brasil revelaram um cariótipo com 2n=58 (24m+16sm+10st+8a; NF=108), com RONs simples localizadas em região distal de um par cromossômico submetacêntrico, com regiões heterocromáticas reduzidas. Este padrão cariotípico se mostra diferenciado de outros já descritos para a espécie de outras bacias hidrográficas. A distribuição da heterocromatina, associada às variações estruturais do cariótipo representam importantes indícios de diferenciação citogenética de P. galeatus em diferentes bacias brasileiras. Considerando o tempo de divergência entre as grandes bacias, é possível que as diferenças citogenéticas encontradas possam representar em alguns casos efetivas barreiras reprodutivas pós-zigóticas. A diversidade cariotípica para a espécie apoia a existência de um complexo de espécies.Palavras-chave: cangati, espécies crípticas, citogenética de peixes, especiação alopátrica. Universidade Federal do AmapáCNPq, CAPES, FINEPAraújo, Washington CandeiaMolina, Wagner Franco2013-10-05info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArtigo Avaliado pelos Paresapplication/pdfhttps://periodicos.unifap.br/index.php/biota/article/view/64310.18561/2179-5746/biotaamazonia.v3n2p33-39Biota Amazônia (Biote Amazonie, Biota Amazonia, Amazonian Biota); v. 3, n. 2 (2013); 33-392179-5746reponame:Biota Amazôniainstname:Universidade Federal do Amapá (UNIFAP)instacron:UNIFAPporhttps://periodicos.unifap.br/index.php/biota/article/view/643/v3n2p33-39.pdfNordeste do BrasilContemporâneafauna nativaDireitos autorais 2013 Biota Amazônia (Biote Amazonie, Biota Amazonia, Amazonian Biota)http://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccess2016-04-14T18:16:55Zoai:ojs.pkp.sfu.ca:article/643Revistahttp://periodicos.unifap.br/index.php/biotaONGhttps://periodicos.unifap.br/index.php/biota/oai||juliosa@unifap.br2179-57462179-5746opendoar:2016-04-14T18:16:55Biota Amazônia - Universidade Federal do Amapá (UNIFAP)false
dc.title.none.fl_str_mv EXCLUSIVE CYTOTYPE IN Parauchenipterus galeatus (SILURIFORMES, AUCHENIPTERIDAE) IN THE EASTERN NORTH-EAST ATLANTIC BASIN OF BRAZIL: INDICATION OF A SPECIES COMPLEX
CITÓTIPO EXCLUSIVO PARA Parauchenipterus galeatus (SILURIFORMES, AUCHENIPTERIDAE) NA BACIA DO ATLÂNTICO NE ORIENTAL DO BRASIL: INDICAÇÕES DE UM COMPLEXO DE ESPÉCIES.
title EXCLUSIVE CYTOTYPE IN Parauchenipterus galeatus (SILURIFORMES, AUCHENIPTERIDAE) IN THE EASTERN NORTH-EAST ATLANTIC BASIN OF BRAZIL: INDICATION OF A SPECIES COMPLEX
spellingShingle EXCLUSIVE CYTOTYPE IN Parauchenipterus galeatus (SILURIFORMES, AUCHENIPTERIDAE) IN THE EASTERN NORTH-EAST ATLANTIC BASIN OF BRAZIL: INDICATION OF A SPECIES COMPLEX
Araújo, Washington Candeia
title_short EXCLUSIVE CYTOTYPE IN Parauchenipterus galeatus (SILURIFORMES, AUCHENIPTERIDAE) IN THE EASTERN NORTH-EAST ATLANTIC BASIN OF BRAZIL: INDICATION OF A SPECIES COMPLEX
title_full EXCLUSIVE CYTOTYPE IN Parauchenipterus galeatus (SILURIFORMES, AUCHENIPTERIDAE) IN THE EASTERN NORTH-EAST ATLANTIC BASIN OF BRAZIL: INDICATION OF A SPECIES COMPLEX
title_fullStr EXCLUSIVE CYTOTYPE IN Parauchenipterus galeatus (SILURIFORMES, AUCHENIPTERIDAE) IN THE EASTERN NORTH-EAST ATLANTIC BASIN OF BRAZIL: INDICATION OF A SPECIES COMPLEX
title_full_unstemmed EXCLUSIVE CYTOTYPE IN Parauchenipterus galeatus (SILURIFORMES, AUCHENIPTERIDAE) IN THE EASTERN NORTH-EAST ATLANTIC BASIN OF BRAZIL: INDICATION OF A SPECIES COMPLEX
title_sort EXCLUSIVE CYTOTYPE IN Parauchenipterus galeatus (SILURIFORMES, AUCHENIPTERIDAE) IN THE EASTERN NORTH-EAST ATLANTIC BASIN OF BRAZIL: INDICATION OF A SPECIES COMPLEX
author Araújo, Washington Candeia
author_facet Araújo, Washington Candeia
Molina, Wagner Franco
author_role author
author2 Molina, Wagner Franco
author2_role author
dc.contributor.none.fl_str_mv
CNPq, CAPES, FINEP
dc.contributor.author.fl_str_mv Araújo, Washington Candeia
Molina, Wagner Franco
description Endemisms among the ichthyofauna of the hydrographic Brazilian basins has been showed frequent, mainly due to vicariance or dispersal processes. Several species constitute genuinely complexes of cryptic species, in clear process of differentiation. Cytogenetic analysis performed in the catfish, Parauchenipterus galeatus, in the basin of the Eastern North-east Atlantic basin of Brazil revealed a karyotype with 2n = 58 (24m+16sm+10st+8a; NF=108), with unique NORs sites located in the distal region of a submetacentric chromosome pair and with reduced heterochromatic regions. This standard karyotype shown differentiated from other already described for species of others basins. The distribution of heterochromatin associated with structural variations of karyotype represent important evidences of cytogenetic differentiation of P. galeatus among the different Brazilian basins. Considering the time of divergence between large basins, it is possible that the cytogenetic differences found may represent in some cases effective post-zygotic reproductive barriers. The diversity of the species karyotype supports the existence of a species complex.Keywords: Cangati; cryptic species; fish cytogenetics; allopatric speciation.
publishDate 2013
dc.date.none.fl_str_mv 2013-10-05
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Artigo Avaliado pelos Pares
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv https://periodicos.unifap.br/index.php/biota/article/view/643
10.18561/2179-5746/biotaamazonia.v3n2p33-39
url https://periodicos.unifap.br/index.php/biota/article/view/643
identifier_str_mv 10.18561/2179-5746/biotaamazonia.v3n2p33-39
dc.language.iso.fl_str_mv por
language por
dc.relation.none.fl_str_mv https://periodicos.unifap.br/index.php/biota/article/view/643/v3n2p33-39.pdf
dc.rights.driver.fl_str_mv Direitos autorais 2013 Biota Amazônia (Biote Amazonie, Biota Amazonia, Amazonian Biota)
http://creativecommons.org/licenses/by/4.0
info:eu-repo/semantics/openAccess
rights_invalid_str_mv Direitos autorais 2013 Biota Amazônia (Biote Amazonie, Biota Amazonia, Amazonian Biota)
http://creativecommons.org/licenses/by/4.0
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv application/pdf
dc.coverage.none.fl_str_mv


Nordeste do Brasil
Contemporânea
fauna nativa
dc.publisher.none.fl_str_mv Universidade Federal do Amapá
publisher.none.fl_str_mv Universidade Federal do Amapá
dc.source.none.fl_str_mv Biota Amazônia (Biote Amazonie, Biota Amazonia, Amazonian Biota); v. 3, n. 2 (2013); 33-39
2179-5746
reponame:Biota Amazônia
instname:Universidade Federal do Amapá (UNIFAP)
instacron:UNIFAP
instname_str Universidade Federal do Amapá (UNIFAP)
instacron_str UNIFAP
institution UNIFAP
reponame_str Biota Amazônia
collection Biota Amazônia
repository.name.fl_str_mv Biota Amazônia - Universidade Federal do Amapá (UNIFAP)
repository.mail.fl_str_mv ||juliosa@unifap.br
_version_ 1788166061163544576

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