Ecological analogies between estuarine bottom trawl fish assemblages from Patos Lagoon, Rio Grande do Sul, Brazil and York River, Virginia, USA

Detalhes bibliográficos
Autor(a) principal: Vieira Sobrinho, João Paes
Data de Publicação: 2006
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da FURG (RI FURG)
Texto Completo: http://repositorio.furg.br/handle/1/5744
http://dx.doi.org/10.1590/S0101-81752006000100017
Resumo: The structure of estuarine fish assemblages at temperate latitudes in Patos Lagoon (32°05’S, 52°04’W), Rio Grande do Sul, Brazil and York River (37°17’N, 76°33’W), Virginia, USA was compared using mid and late 1970’s data from bottom trawl collection to investigate whether geographically isolated fish assemblages have similar ecological structure given similar latitudinal positions on the warm-temperate southwestern and northwestern Atlantic regions, respectively. Since estuarine species often exhibit an ontogenetic shift in habitat requirements or preferences we examined Capture per Unity of Effort by size class (CPUE-SC) and split species into “size ecological taxa” (SET) for analysis. The use of CPUE-SC also allowed the abundance of a SET to be computed by summing the mean CPUE of each size class within that SET and use this information to follows SET’s temporal and or spatial abundance. A total of 65 and 63 species was collected during a year of bottom trawling in the Patos Lagoon and York River estuaries, respectively. In both localities the strongest modal size class was < 80 mm TL, and several abundant species were smaller than 100 mm TL. The size between 80 and 100 TL effectively separated several species into discrete SET’s in both systems. Those SET’s could have different ecological preferences, temporal and spatial distributions and so identified as different "ecological taxa". In warm months, when predation by large fish is most likely, the abundance of fish between 80 and 100 mm TL in "bottom trawl" demersal fish assemblages was low in both systems. Only the sea catfishes, in Patos Lagoon, protected by strong dorsal and pectoral spines, and the Hogchoker, in the York River, protected by burrowing in the bottom substrate, peak in abundance at this size class. The seasonal pattern of estuarine use was similar between localities and did not differ from other warm-temperate estuarine fish assemblages.
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spelling Ecological analogies between estuarine bottom trawl fish assemblages from Patos Lagoon, Rio Grande do Sul, Brazil and York River, Virginia, USAAnalogias ecológicas entre as assembléias de peixes de fundo dos estuários da Laguna dos Patos, Rio Grande do Sul, Brasil e York River, Virginia, EUADistributionEstuarine fishesSizeSouth-north comparisonZoogeographyComparação sul-norteDistribuiçãoPeixes estuarinosTamanhoZoogeografiaThe structure of estuarine fish assemblages at temperate latitudes in Patos Lagoon (32°05’S, 52°04’W), Rio Grande do Sul, Brazil and York River (37°17’N, 76°33’W), Virginia, USA was compared using mid and late 1970’s data from bottom trawl collection to investigate whether geographically isolated fish assemblages have similar ecological structure given similar latitudinal positions on the warm-temperate southwestern and northwestern Atlantic regions, respectively. Since estuarine species often exhibit an ontogenetic shift in habitat requirements or preferences we examined Capture per Unity of Effort by size class (CPUE-SC) and split species into “size ecological taxa” (SET) for analysis. The use of CPUE-SC also allowed the abundance of a SET to be computed by summing the mean CPUE of each size class within that SET and use this information to follows SET’s temporal and or spatial abundance. A total of 65 and 63 species was collected during a year of bottom trawling in the Patos Lagoon and York River estuaries, respectively. In both localities the strongest modal size class was < 80 mm TL, and several abundant species were smaller than 100 mm TL. The size between 80 and 100 TL effectively separated several species into discrete SET’s in both systems. Those SET’s could have different ecological preferences, temporal and spatial distributions and so identified as different "ecological taxa". In warm months, when predation by large fish is most likely, the abundance of fish between 80 and 100 mm TL in "bottom trawl" demersal fish assemblages was low in both systems. Only the sea catfishes, in Patos Lagoon, protected by strong dorsal and pectoral spines, and the Hogchoker, in the York River, protected by burrowing in the bottom substrate, peak in abundance at this size class. The seasonal pattern of estuarine use was similar between localities and did not differ from other warm-temperate estuarine fish assemblages.A estrutura das assembléias de peixes de dois estuários temperados – Lagoa dos Patos, Brasil e York River, Estados Unidos – foi comparada usando dados de rede de arrasto de fundo, da década de 70, em ambas as regiões. O objetivo do trabalho foi o de investigar se a fauna de peixes de dois estuários, localizados em duas regiões temperadas-quente do Atlântico, embora isolados geograficamente (Hemisfério Sul e Norte), apresentavam a mesma estrutura ecológica. Considerando a ontogenia das espécies utilizou-se o método da Captura por Unidade de Esforço por Classe de Tamanho (CPUE-CT) para separar as espécies dominantes em Unidades Ecológicas de Tamanho (UET). O uso da técnica do CPUE-CT permite que a abundância das UET seja computada através da soma da abundância de cada uma das classes de tamanho que incorporam estas UET e desta forma usar o CPUE das UET para estudar sua variação temporal ou espacial de abundância. Após um ano de coleta mensal foram observadas 65 espécies nas coletas de arrasto de fundo na Laguna dos Patos e 63 espécies no York River. Em ambas as localidades as maiores modas de tamanho foram menores que 80 mm de comprimento total (CT), e diversas espécies ocorrem em tamanho menor do que 100 mm CT. Entre 80 e 100 mm CT foi possível separar efetivamente diversas espécies em UET. Diferentes UET de uma mesma espécie ocorrem em diferentes habitats e em épocas distintas, podendo assim ser classificadas como “Taxas Ecológicos” distintos de uma mesma espécie. Nos meses quentes, quando ocorre a maior pressão de predação dos grandes peixes piscívoros, a abundância dos peixes com tamanhos entre 80 e 100 mm CT nas coletas de arrasto de fundo é baixa em ambos os sistemas. Somente dois grupos de peixes são abundantes neste tamanho, os bagres marinhos da Laguna dos Patos que estão protegidos da predação pelos espinhos dorsais e peitorais, e o linguado-Zebra no York River, que se enterra no substrato evitando a predação.2015-12-31T14:32:34Z2015-12-31T14:32:34Z2006info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfVIEIRA SOBRINHO, João Paes. Ecological analogies between estuarine bottom trawl fish assemblages from Patos Lagoon, Rio Grande do Sul, Brazil and York River, Virginia, USA. Revista Brasileira de Zoologia, Curitiba, v. 23, n. 1, p. 234-247, 2006. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000100017&lng=en&nrm=iso>. Acesso em: 29 dez. 2015.0101-8175http://repositorio.furg.br/handle/1/5744http://dx.doi.org/10.1590/S0101-81752006000100017engVieira Sobrinho, João Paesinfo:eu-repo/semantics/openAccessreponame:Repositório Institucional da FURG (RI FURG)instname:Universidade Federal do Rio Grande (FURG)instacron:FURG2015-12-31T14:32:34Zoai:repositorio.furg.br:1/5744Repositório InstitucionalPUBhttps://repositorio.furg.br/oai/request || http://200.19.254.174/oai/requestopendoar:2015-12-31T14:32:34Repositório Institucional da FURG (RI FURG) - Universidade Federal do Rio Grande (FURG)false
dc.title.none.fl_str_mv Ecological analogies between estuarine bottom trawl fish assemblages from Patos Lagoon, Rio Grande do Sul, Brazil and York River, Virginia, USA
Analogias ecológicas entre as assembléias de peixes de fundo dos estuários da Laguna dos Patos, Rio Grande do Sul, Brasil e York River, Virginia, EUA
title Ecological analogies between estuarine bottom trawl fish assemblages from Patos Lagoon, Rio Grande do Sul, Brazil and York River, Virginia, USA
spellingShingle Ecological analogies between estuarine bottom trawl fish assemblages from Patos Lagoon, Rio Grande do Sul, Brazil and York River, Virginia, USA
Vieira Sobrinho, João Paes
Distribution
Estuarine fishes
Size
South-north comparison
Zoogeography
Comparação sul-norte
Distribuição
Peixes estuarinos
Tamanho
Zoogeografia
title_short Ecological analogies between estuarine bottom trawl fish assemblages from Patos Lagoon, Rio Grande do Sul, Brazil and York River, Virginia, USA
title_full Ecological analogies between estuarine bottom trawl fish assemblages from Patos Lagoon, Rio Grande do Sul, Brazil and York River, Virginia, USA
title_fullStr Ecological analogies between estuarine bottom trawl fish assemblages from Patos Lagoon, Rio Grande do Sul, Brazil and York River, Virginia, USA
title_full_unstemmed Ecological analogies between estuarine bottom trawl fish assemblages from Patos Lagoon, Rio Grande do Sul, Brazil and York River, Virginia, USA
title_sort Ecological analogies between estuarine bottom trawl fish assemblages from Patos Lagoon, Rio Grande do Sul, Brazil and York River, Virginia, USA
author Vieira Sobrinho, João Paes
author_facet Vieira Sobrinho, João Paes
author_role author
dc.contributor.author.fl_str_mv Vieira Sobrinho, João Paes
dc.subject.por.fl_str_mv Distribution
Estuarine fishes
Size
South-north comparison
Zoogeography
Comparação sul-norte
Distribuição
Peixes estuarinos
Tamanho
Zoogeografia
topic Distribution
Estuarine fishes
Size
South-north comparison
Zoogeography
Comparação sul-norte
Distribuição
Peixes estuarinos
Tamanho
Zoogeografia
description The structure of estuarine fish assemblages at temperate latitudes in Patos Lagoon (32°05’S, 52°04’W), Rio Grande do Sul, Brazil and York River (37°17’N, 76°33’W), Virginia, USA was compared using mid and late 1970’s data from bottom trawl collection to investigate whether geographically isolated fish assemblages have similar ecological structure given similar latitudinal positions on the warm-temperate southwestern and northwestern Atlantic regions, respectively. Since estuarine species often exhibit an ontogenetic shift in habitat requirements or preferences we examined Capture per Unity of Effort by size class (CPUE-SC) and split species into “size ecological taxa” (SET) for analysis. The use of CPUE-SC also allowed the abundance of a SET to be computed by summing the mean CPUE of each size class within that SET and use this information to follows SET’s temporal and or spatial abundance. A total of 65 and 63 species was collected during a year of bottom trawling in the Patos Lagoon and York River estuaries, respectively. In both localities the strongest modal size class was < 80 mm TL, and several abundant species were smaller than 100 mm TL. The size between 80 and 100 TL effectively separated several species into discrete SET’s in both systems. Those SET’s could have different ecological preferences, temporal and spatial distributions and so identified as different "ecological taxa". In warm months, when predation by large fish is most likely, the abundance of fish between 80 and 100 mm TL in "bottom trawl" demersal fish assemblages was low in both systems. Only the sea catfishes, in Patos Lagoon, protected by strong dorsal and pectoral spines, and the Hogchoker, in the York River, protected by burrowing in the bottom substrate, peak in abundance at this size class. The seasonal pattern of estuarine use was similar between localities and did not differ from other warm-temperate estuarine fish assemblages.
publishDate 2006
dc.date.none.fl_str_mv 2006
2015-12-31T14:32:34Z
2015-12-31T14:32:34Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
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status_str publishedVersion
dc.identifier.uri.fl_str_mv VIEIRA SOBRINHO, João Paes. Ecological analogies between estuarine bottom trawl fish assemblages from Patos Lagoon, Rio Grande do Sul, Brazil and York River, Virginia, USA. Revista Brasileira de Zoologia, Curitiba, v. 23, n. 1, p. 234-247, 2006. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000100017&lng=en&nrm=iso>. Acesso em: 29 dez. 2015.
0101-8175
http://repositorio.furg.br/handle/1/5744
http://dx.doi.org/10.1590/S0101-81752006000100017
identifier_str_mv VIEIRA SOBRINHO, João Paes. Ecological analogies between estuarine bottom trawl fish assemblages from Patos Lagoon, Rio Grande do Sul, Brazil and York River, Virginia, USA. Revista Brasileira de Zoologia, Curitiba, v. 23, n. 1, p. 234-247, 2006. Disponível em: <http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0101-81752006000100017&lng=en&nrm=iso>. Acesso em: 29 dez. 2015.
0101-8175
url http://repositorio.furg.br/handle/1/5744
http://dx.doi.org/10.1590/S0101-81752006000100017
dc.language.iso.fl_str_mv eng
language eng
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