Curvina Plagioscion squamosissimus (Heckel, 1840) (Peciformes, Sciaenidae) feeding activity in Parana river
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | , |
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/4438 |
Resumo: | Curvina Plagioscion squamosissimus (Heckel, 1840) feeding activity at the upper Paraná river floodplain (Porto Rico region, state of Paraná, Brazil) and Itaipu reservoir was investigated. The fishes were collected monthly with different mesh-sized gill nets October, 1986 through September, 1989 at upper Paraná river and November, 1983 through February, 1989 at Itaipu reservoir. The nets were set for 24 hours and the fishes were collected at sunrise (7A.M.), afternoon (3P.M.) and night (11P.M.) at Itaipu reservoir and each, three hours at upper Paraná river floodplain to determine daily feeding rhythm. Stomach repletion degree and food update frequency were used as stomach repletion indices. In both environments a high incidence of empty stomachs was registered. The annual variations of these indices were more pronounced in Itaipu reservoir. In terms of seasonal variations, feeding activities showed a higher frequency in hot seasons. Daily food intake showed to be more intense at early morning hours revealing that this species is a diurnal predator that uses visual stimulus to detect and pursue its preys. |
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Curvina Plagioscion squamosissimus (Heckel, 1840) (Peciformes, Sciaenidae) feeding activity in Parana riverAtividade alimentar da curvina Plagioscion squamosissimus (Heckel, 1840) (Perciformes, Sciaenidae) no rio Paranáatividade alimentarvariações temporaisPlagioscion squamosissimusreservatórioplanície de inundação2.00.00.00-6 Ciências BiológicasCurvina Plagioscion squamosissimus (Heckel, 1840) feeding activity at the upper Paraná river floodplain (Porto Rico region, state of Paraná, Brazil) and Itaipu reservoir was investigated. The fishes were collected monthly with different mesh-sized gill nets October, 1986 through September, 1989 at upper Paraná river and November, 1983 through February, 1989 at Itaipu reservoir. The nets were set for 24 hours and the fishes were collected at sunrise (7A.M.), afternoon (3P.M.) and night (11P.M.) at Itaipu reservoir and each, three hours at upper Paraná river floodplain to determine daily feeding rhythm. Stomach repletion degree and food update frequency were used as stomach repletion indices. In both environments a high incidence of empty stomachs was registered. The annual variations of these indices were more pronounced in Itaipu reservoir. In terms of seasonal variations, feeding activities showed a higher frequency in hot seasons. Daily food intake showed to be more intense at early morning hours revealing that this species is a diurnal predator that uses visual stimulus to detect and pursue its preys.A atividade alimentar anual, estacional e diária da curvina Plagioscion squamosissimus (Heckel, 1840) foi avaliada para a planície de inundação do alto rio Paraná (município de Porto Rico-PR) e para o reservatório de Itaipu. Os peixes foram capturados com redes de espera de diferentes malhagens, sendo as coletas realizadas mensalmente, de outubro de 86 a setembro de 88, no primeiro ambiente, e de novembro de 83 a fevereiro de 89, no segundo. Os aparelhos de pesca ficaram expostos por 24h, com despescas ao amanhecer (7h), durante o dia (15h) e ao anoitecer (23h) e a cada três horas, em coletas especiais, para determinação do ritmo diário. Foi utilizado o grau de enchimento do estômago e a freqüência de estômagos com alimento como indicadores de repleção estomacal. Registrou-se alta incidência de estômagos vazios, em ambos os ambientes. As variações anuais desses indicadores foram mais pronunciadas no reservatório de Itaipu. Em relação às variações sazonais, a atividade alimentar foi sempre mais elevada nos períodos mais quentes, em contraste com o inverno. A tomada de alimento no período de 24 horas foi mais intensa nas primeiras horas da manhã, revelando-se uma espécie predadora tipicamente diurna, utilizando estímulos visuais para a detecção e perseguição das presas.Universidade Estadual De Maringá2008-07-17info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/443810.4025/actascibiolsci.v21i0.4438Acta Scientiarum. Biological Sciences; Vol 21 (1999); 309-314Acta Scientiarum. Biological Sciences; v. 21 (1999); 309-3141807-863X1679-9283reponame:Acta Scientiarum Biological Sciencesinstname:Universidade Estadual de Maringá (UEM)instacron:UEMporhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/4438/3021Hahn, Norma SegattiLoureiro, Valdirene EsgarbosaDelariva, Rosilene Lucianainfo:eu-repo/semantics/openAccess2022-11-23T17:33:40Zoai:periodicos.uem.br/ojs:article/4438Revistahttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSciPUBhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/oai||actabiol@uem.br1807-863X1679-9283opendoar:2022-11-23T17:33:40Acta Scientiarum Biological Sciences - Universidade Estadual de Maringá (UEM)false |
dc.title.none.fl_str_mv |
Curvina Plagioscion squamosissimus (Heckel, 1840) (Peciformes, Sciaenidae) feeding activity in Parana river Atividade alimentar da curvina Plagioscion squamosissimus (Heckel, 1840) (Perciformes, Sciaenidae) no rio Paraná |
title |
Curvina Plagioscion squamosissimus (Heckel, 1840) (Peciformes, Sciaenidae) feeding activity in Parana river |
spellingShingle |
Curvina Plagioscion squamosissimus (Heckel, 1840) (Peciformes, Sciaenidae) feeding activity in Parana river Hahn, Norma Segatti atividade alimentar variações temporais Plagioscion squamosissimus reservatório planície de inundação 2.00.00.00-6 Ciências Biológicas |
title_short |
Curvina Plagioscion squamosissimus (Heckel, 1840) (Peciformes, Sciaenidae) feeding activity in Parana river |
title_full |
Curvina Plagioscion squamosissimus (Heckel, 1840) (Peciformes, Sciaenidae) feeding activity in Parana river |
title_fullStr |
Curvina Plagioscion squamosissimus (Heckel, 1840) (Peciformes, Sciaenidae) feeding activity in Parana river |
title_full_unstemmed |
Curvina Plagioscion squamosissimus (Heckel, 1840) (Peciformes, Sciaenidae) feeding activity in Parana river |
title_sort |
Curvina Plagioscion squamosissimus (Heckel, 1840) (Peciformes, Sciaenidae) feeding activity in Parana river |
author |
Hahn, Norma Segatti |
author_facet |
Hahn, Norma Segatti Loureiro, Valdirene Esgarbosa Delariva, Rosilene Luciana |
author_role |
author |
author2 |
Loureiro, Valdirene Esgarbosa Delariva, Rosilene Luciana |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Hahn, Norma Segatti Loureiro, Valdirene Esgarbosa Delariva, Rosilene Luciana |
dc.subject.por.fl_str_mv |
atividade alimentar variações temporais Plagioscion squamosissimus reservatório planície de inundação 2.00.00.00-6 Ciências Biológicas |
topic |
atividade alimentar variações temporais Plagioscion squamosissimus reservatório planície de inundação 2.00.00.00-6 Ciências Biológicas |
description |
Curvina Plagioscion squamosissimus (Heckel, 1840) feeding activity at the upper Paraná river floodplain (Porto Rico region, state of Paraná, Brazil) and Itaipu reservoir was investigated. The fishes were collected monthly with different mesh-sized gill nets October, 1986 through September, 1989 at upper Paraná river and November, 1983 through February, 1989 at Itaipu reservoir. The nets were set for 24 hours and the fishes were collected at sunrise (7A.M.), afternoon (3P.M.) and night (11P.M.) at Itaipu reservoir and each, three hours at upper Paraná river floodplain to determine daily feeding rhythm. Stomach repletion degree and food update frequency were used as stomach repletion indices. In both environments a high incidence of empty stomachs was registered. The annual variations of these indices were more pronounced in Itaipu reservoir. In terms of seasonal variations, feeding activities showed a higher frequency in hot seasons. Daily food intake showed to be more intense at early morning hours revealing that this species is a diurnal predator that uses visual stimulus to detect and pursue its preys. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-07-17 |
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/4438 10.4025/actascibiolsci.v21i0.4438 |
url |
http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/4438 |
identifier_str_mv |
10.4025/actascibiolsci.v21i0.4438 |
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/4438/3021 |
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 21 (1999); 309-314 Acta Scientiarum. Biological Sciences; v. 21 (1999); 309-314 1807-863X 1679-9283 reponame:Acta Scientiarum Biological Sciences instname:Universidade Estadual de Maringá (UEM) instacron:UEM |
instname_str |
Universidade Estadual de Maringá (UEM) |
instacron_str |
UEM |
institution |
UEM |
reponame_str |
Acta Scientiarum Biological Sciences |
collection |
Acta Scientiarum Biological Sciences |
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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1799317394022203392 |