Evidence of habitat fragmentation affecting fish movement between the Patos and Mirim coastal lagoons in southern Brazil

Detalhes bibliográficos
Autor(a) principal: Burns, Marcelo Dias de Mattos
Data de Publicação: 2006
Outros Autores: Garcia, Alexandre Miranda, Vieira Sobrinho, João Paes, Bemvenuti, Marlise de Azevedo, Marques, David Manuel Lélinho da Motta, Condini, Mario Vinicius Lopes
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da FURG (RI FURG)
Texto Completo: http://repositorio.furg.br/handle/1/1951
Resumo: The communication between the Patos and Mirim lagoon systems occurs via a natural channel called São Gonçalo. In 1977, a dam was built in this channel to prevent entrance of saline waters from Patos Lagoon estuary into the Mirim Lagoon. Our results showed an abrupt discontinuity in salinity and fish species distribution along the study sites. Sites below the dam showed salinity values higher than zero, whereas sites above had zero salinity values across all sampling periods. Marine and estuarine fishes (e.g., mullets Mugil platanus, M. curema, silversides Odontesthes argentinensis, Atherinella brasiliensis, sardine Brevoortia pectinata, and white croaker Micropogonias furnieri) were not captured above the dam. If these juvenile fishes could enter the Mirim lagoon in greater numbers, they probably would enhance catches in the artisanal fishery. We hypothesized that the São Gonçalo dam acts as a barrier hindering the entrance of salinity water and fishes inside the Mirim Lagoon.
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spelling Evidence of habitat fragmentation affecting fish movement between the Patos and Mirim coastal lagoons in southern BrazilDamFishMigrationArtisanal fisheryEstuaryThe communication between the Patos and Mirim lagoon systems occurs via a natural channel called São Gonçalo. In 1977, a dam was built in this channel to prevent entrance of saline waters from Patos Lagoon estuary into the Mirim Lagoon. Our results showed an abrupt discontinuity in salinity and fish species distribution along the study sites. Sites below the dam showed salinity values higher than zero, whereas sites above had zero salinity values across all sampling periods. Marine and estuarine fishes (e.g., mullets Mugil platanus, M. curema, silversides Odontesthes argentinensis, Atherinella brasiliensis, sardine Brevoortia pectinata, and white croaker Micropogonias furnieri) were not captured above the dam. If these juvenile fishes could enter the Mirim lagoon in greater numbers, they probably would enhance catches in the artisanal fishery. We hypothesized that the São Gonçalo dam acts as a barrier hindering the entrance of salinity water and fishes inside the Mirim Lagoon.A comunicação entre o sistema lagunar Patos-Mirim ocorre através de um canal natural denominado São Gonçalo. Em 1977, foi construída uma eclusa com o objetivo de evitar a entrada de água salgada, proveniente do estuário da Lagoa dos Patos, para o interior da Lagoa Mirim. Os resultados mostraram uma descontinuidade abrupta na distribuição da salinidade e dos peixes ao longo da área de estudo. Estações de coleta abaixo da barragem tiveram valores de salinidade acima de zero, enquanto os valores foram iguais a zero nas estações acima da barragem durante o período amostrado. Peixes marinhos e estuarinos (p.ex., tainhas Mugil platanus, M. curema, peixes-rei Odontesthes argentinensis, Atherinella brasiliensis, sardinha Brevoortia pectinata) não foram capturados acima da barragem. Caso entrassem em abundância na Mirim tais espécies poderiam contribuir positivamente para os desembarques da pesca artesanal nessa região. Dessa forma, é sugerida a hipótese de que a barragem do São Gonçalo atua como uma barreira impedindo a entrada de águas salobras e peixes marinhos e estuarinos para o interior da Lagoa Mirim.2012-03-20T20:13:09Z2012-03-20T20:13:09Z2006info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfBURNS, Marcelo Dias de Mattos et al. Evidence of habitat fragmentation affecting fish movement between the Patos and Mirim coastal lagoons in southern Brazil. Neotropical Ichthyology, v. 4, n. 1, p. 69-72, 2006. Disponível em: <http://www.scielo.br/pdf/ni/v4n1/v4n1a06.pdf>. Acesso em: 11 jan. 2012.1679-6225http://repositorio.furg.br/handle/1/1951engBurns, Marcelo Dias de MattosGarcia, Alexandre MirandaVieira Sobrinho, João PaesBemvenuti, Marlise de AzevedoMarques, David Manuel Lélinho da MottaCondini, Mario Vinicius Lopesinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da FURG (RI FURG)instname:Universidade Federal do Rio Grande (FURG)instacron:FURG2023-01-17T12:58:05Zoai:repositorio.furg.br:1/1951Repositório InstitucionalPUBhttps://repositorio.furg.br/oai/request || http://200.19.254.174/oai/requestopendoar:2023-01-17T12:58:05Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG)false
dc.title.none.fl_str_mv Evidence of habitat fragmentation affecting fish movement between the Patos and Mirim coastal lagoons in southern Brazil
title Evidence of habitat fragmentation affecting fish movement between the Patos and Mirim coastal lagoons in southern Brazil
spellingShingle Evidence of habitat fragmentation affecting fish movement between the Patos and Mirim coastal lagoons in southern Brazil
Burns, Marcelo Dias de Mattos
Dam
Fish
Migration
Artisanal fishery
Estuary
title_short Evidence of habitat fragmentation affecting fish movement between the Patos and Mirim coastal lagoons in southern Brazil
title_full Evidence of habitat fragmentation affecting fish movement between the Patos and Mirim coastal lagoons in southern Brazil
title_fullStr Evidence of habitat fragmentation affecting fish movement between the Patos and Mirim coastal lagoons in southern Brazil
title_full_unstemmed Evidence of habitat fragmentation affecting fish movement between the Patos and Mirim coastal lagoons in southern Brazil
title_sort Evidence of habitat fragmentation affecting fish movement between the Patos and Mirim coastal lagoons in southern Brazil
author Burns, Marcelo Dias de Mattos
author_facet Burns, Marcelo Dias de Mattos
Garcia, Alexandre Miranda
Vieira Sobrinho, João Paes
Bemvenuti, Marlise de Azevedo
Marques, David Manuel Lélinho da Motta
Condini, Mario Vinicius Lopes
author_role author
author2 Garcia, Alexandre Miranda
Vieira Sobrinho, João Paes
Bemvenuti, Marlise de Azevedo
Marques, David Manuel Lélinho da Motta
Condini, Mario Vinicius Lopes
author2_role author
author
author
author
author
dc.contributor.author.fl_str_mv Burns, Marcelo Dias de Mattos
Garcia, Alexandre Miranda
Vieira Sobrinho, João Paes
Bemvenuti, Marlise de Azevedo
Marques, David Manuel Lélinho da Motta
Condini, Mario Vinicius Lopes
dc.subject.por.fl_str_mv Dam
Fish
Migration
Artisanal fishery
Estuary
topic Dam
Fish
Migration
Artisanal fishery
Estuary
description The communication between the Patos and Mirim lagoon systems occurs via a natural channel called São Gonçalo. In 1977, a dam was built in this channel to prevent entrance of saline waters from Patos Lagoon estuary into the Mirim Lagoon. Our results showed an abrupt discontinuity in salinity and fish species distribution along the study sites. Sites below the dam showed salinity values higher than zero, whereas sites above had zero salinity values across all sampling periods. Marine and estuarine fishes (e.g., mullets Mugil platanus, M. curema, silversides Odontesthes argentinensis, Atherinella brasiliensis, sardine Brevoortia pectinata, and white croaker Micropogonias furnieri) were not captured above the dam. If these juvenile fishes could enter the Mirim lagoon in greater numbers, they probably would enhance catches in the artisanal fishery. We hypothesized that the São Gonçalo dam acts as a barrier hindering the entrance of salinity water and fishes inside the Mirim Lagoon.
publishDate 2006
dc.date.none.fl_str_mv 2006
2012-03-20T20:13:09Z
2012-03-20T20:13:09Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv BURNS, Marcelo Dias de Mattos et al. Evidence of habitat fragmentation affecting fish movement between the Patos and Mirim coastal lagoons in southern Brazil. Neotropical Ichthyology, v. 4, n. 1, p. 69-72, 2006. Disponível em: <http://www.scielo.br/pdf/ni/v4n1/v4n1a06.pdf>. Acesso em: 11 jan. 2012.
1679-6225
http://repositorio.furg.br/handle/1/1951
identifier_str_mv BURNS, Marcelo Dias de Mattos et al. Evidence of habitat fragmentation affecting fish movement between the Patos and Mirim coastal lagoons in southern Brazil. Neotropical Ichthyology, v. 4, n. 1, p. 69-72, 2006. Disponível em: <http://www.scielo.br/pdf/ni/v4n1/v4n1a06.pdf>. Acesso em: 11 jan. 2012.
1679-6225
url http://repositorio.furg.br/handle/1/1951
dc.language.iso.fl_str_mv eng
language eng
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.source.none.fl_str_mv reponame:Repositório Institucional da FURG (RI FURG)
instname:Universidade Federal do Rio Grande (FURG)
instacron:FURG
instname_str Universidade Federal do Rio Grande (FURG)
instacron_str FURG
institution FURG
reponame_str Repositório Institucional da FURG (RI FURG)
collection Repositório Institucional da FURG (RI FURG)
repository.name.fl_str_mv Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG)
repository.mail.fl_str_mv
_version_ 1807384404449820672

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