Epigean and subterranean ichthyofauna in Cordisburgo karst area, eastern Brazil
Autor(a) principal: | |
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Data de Publicação: | 2009 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Biota Neotropica |
Texto Completo: | http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032009000300026 |
Resumo: | After an ichthyofaunistic survey conducted in May 2007 on surface (epigean) water bodies of Cordisburgo karst area, State of Minas Gerais, 13 species were recorded, mostly characiforms; in addition three non-troglomorphic (normally eyed and pigmented) and one troglomorphic catfish (siluriforms) species were recorded in two caves surveyed at different occasions, totaling 17 fish species for the area. All the nominal species herein reported for Cordisburgo area have been previously reported for the Rio das Velhas basin. None of the species observed in caves were found in epigean habitats and vice-versa. The four cave species are distributed throughout subterranean stream reaches, with individuals at different size/age classes. This, associated to the lack of conspicuous morphological differences in relation to epigean congeners, indicate that Trichomycterus brasiliensis, Gymnotus cf. carapo and Pimelodella cf. vittata are troglophiles (species encompassing individuals able to live and complete their life cycle either in the surface or in the subterranean environment) in the Morena Cave; the latter forms a large population and may be at the beginning of a differentiation process due to isolation in the subterranean habitat, as indicated by a slight reduction in eye size. Topographic isolation may be the cause for the incipient, but unmistakable troglomorphism of the Rhamdiopsis population found in the Salitre Cave, allowing for its classification as troglobite (exclusively subterranean species). The Cordisburgo area is subject to significant anthropic pressure, mainly represented by deforestation for agriculture, cattle raising and timbering. Tourism is an additional important threat for cave communities, calling for urgent protection measures. |
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Biota Neotropica |
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Epigean and subterranean ichthyofauna in Cordisburgo karst area, eastern BrazilMinas Gerais Statecavestroglobitestroglophilesfreswater fishesbiodiversityAfter an ichthyofaunistic survey conducted in May 2007 on surface (epigean) water bodies of Cordisburgo karst area, State of Minas Gerais, 13 species were recorded, mostly characiforms; in addition three non-troglomorphic (normally eyed and pigmented) and one troglomorphic catfish (siluriforms) species were recorded in two caves surveyed at different occasions, totaling 17 fish species for the area. All the nominal species herein reported for Cordisburgo area have been previously reported for the Rio das Velhas basin. None of the species observed in caves were found in epigean habitats and vice-versa. The four cave species are distributed throughout subterranean stream reaches, with individuals at different size/age classes. This, associated to the lack of conspicuous morphological differences in relation to epigean congeners, indicate that Trichomycterus brasiliensis, Gymnotus cf. carapo and Pimelodella cf. vittata are troglophiles (species encompassing individuals able to live and complete their life cycle either in the surface or in the subterranean environment) in the Morena Cave; the latter forms a large population and may be at the beginning of a differentiation process due to isolation in the subterranean habitat, as indicated by a slight reduction in eye size. Topographic isolation may be the cause for the incipient, but unmistakable troglomorphism of the Rhamdiopsis population found in the Salitre Cave, allowing for its classification as troglobite (exclusively subterranean species). The Cordisburgo area is subject to significant anthropic pressure, mainly represented by deforestation for agriculture, cattle raising and timbering. Tourism is an additional important threat for cave communities, calling for urgent protection measures.Instituto Virtual da Biodiversidade | BIOTA - FAPESP2009-09-01info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersiontext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032009000300026Biota Neotropica v.9 n.3 2009reponame:Biota Neotropicainstname:Instituto Virtual da Biodiversidade (BIOTA-FAPESP)instacron:BIOTA - FAPESP10.1590/S1676-06032009000300026info:eu-repo/semantics/openAccessTrajano,EleonoraSecutti,SandroMattox,George Mendes Taliaferroeng2010-01-26T00:00:00Zoai:scielo:S1676-06032009000300026Revistahttps://www.biotaneotropica.org.br/v20n1/pt/https://old.scielo.br/oai/scielo-oai.php||juliosa@unifap.br1676-06111676-0611opendoar:2010-01-26T00:00Biota Neotropica - Instituto Virtual da Biodiversidade (BIOTA-FAPESP)false |
dc.title.none.fl_str_mv |
Epigean and subterranean ichthyofauna in Cordisburgo karst area, eastern Brazil |
title |
Epigean and subterranean ichthyofauna in Cordisburgo karst area, eastern Brazil |
spellingShingle |
Epigean and subterranean ichthyofauna in Cordisburgo karst area, eastern Brazil Trajano,Eleonora Minas Gerais State caves troglobites troglophiles freswater fishes biodiversity |
title_short |
Epigean and subterranean ichthyofauna in Cordisburgo karst area, eastern Brazil |
title_full |
Epigean and subterranean ichthyofauna in Cordisburgo karst area, eastern Brazil |
title_fullStr |
Epigean and subterranean ichthyofauna in Cordisburgo karst area, eastern Brazil |
title_full_unstemmed |
Epigean and subterranean ichthyofauna in Cordisburgo karst area, eastern Brazil |
title_sort |
Epigean and subterranean ichthyofauna in Cordisburgo karst area, eastern Brazil |
author |
Trajano,Eleonora |
author_facet |
Trajano,Eleonora Secutti,Sandro Mattox,George Mendes Taliaferro |
author_role |
author |
author2 |
Secutti,Sandro Mattox,George Mendes Taliaferro |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Trajano,Eleonora Secutti,Sandro Mattox,George Mendes Taliaferro |
dc.subject.por.fl_str_mv |
Minas Gerais State caves troglobites troglophiles freswater fishes biodiversity |
topic |
Minas Gerais State caves troglobites troglophiles freswater fishes biodiversity |
description |
After an ichthyofaunistic survey conducted in May 2007 on surface (epigean) water bodies of Cordisburgo karst area, State of Minas Gerais, 13 species were recorded, mostly characiforms; in addition three non-troglomorphic (normally eyed and pigmented) and one troglomorphic catfish (siluriforms) species were recorded in two caves surveyed at different occasions, totaling 17 fish species for the area. All the nominal species herein reported for Cordisburgo area have been previously reported for the Rio das Velhas basin. None of the species observed in caves were found in epigean habitats and vice-versa. The four cave species are distributed throughout subterranean stream reaches, with individuals at different size/age classes. This, associated to the lack of conspicuous morphological differences in relation to epigean congeners, indicate that Trichomycterus brasiliensis, Gymnotus cf. carapo and Pimelodella cf. vittata are troglophiles (species encompassing individuals able to live and complete their life cycle either in the surface or in the subterranean environment) in the Morena Cave; the latter forms a large population and may be at the beginning of a differentiation process due to isolation in the subterranean habitat, as indicated by a slight reduction in eye size. Topographic isolation may be the cause for the incipient, but unmistakable troglomorphism of the Rhamdiopsis population found in the Salitre Cave, allowing for its classification as troglobite (exclusively subterranean species). The Cordisburgo area is subject to significant anthropic pressure, mainly represented by deforestation for agriculture, cattle raising and timbering. Tourism is an additional important threat for cave communities, calling for urgent protection measures. |
publishDate |
2009 |
dc.date.none.fl_str_mv |
2009-09-01 |
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=S1676-06032009000300026 |
url |
http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1676-06032009000300026 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
10.1590/S1676-06032009000300026 |
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 |
Instituto Virtual da Biodiversidade | BIOTA - FAPESP |
publisher.none.fl_str_mv |
Instituto Virtual da Biodiversidade | BIOTA - FAPESP |
dc.source.none.fl_str_mv |
Biota Neotropica v.9 n.3 2009 reponame:Biota Neotropica instname:Instituto Virtual da Biodiversidade (BIOTA-FAPESP) instacron:BIOTA - FAPESP |
instname_str |
Instituto Virtual da Biodiversidade (BIOTA-FAPESP) |
instacron_str |
BIOTA - FAPESP |
institution |
BIOTA - FAPESP |
reponame_str |
Biota Neotropica |
collection |
Biota Neotropica |
repository.name.fl_str_mv |
Biota Neotropica - Instituto Virtual da Biodiversidade (BIOTA-FAPESP) |
repository.mail.fl_str_mv |
||juliosa@unifap.br |
_version_ |
1754575896832901120 |