Alterations in the Pterodoras granulosus (Valenciennes, 1833) (Osteichthyes, Doradidae) diet due to the abundance variation of a bivalve invader species in the Itaipu Reservoir, Brazil
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/2315 |
Resumo: | Variations in the diet of Pterodoras granulosus (Osteichthyes, Doradidae) were evaluated from 1994 to 1998 taking into account two events that affected the abundance of an introduced bivalve Corbicula fluminae: (i) the abundance explosion of the bivalve in the reservoir, started in 1994 and (ii) the slaughter of the bivalve population due to fluctuations in water level, started in July 1996. Stomach contents were analyzed and results were shown considering the methods of frequency of occurrence and volumetric, combined in an alimentary index (AI). In 1994, 1995 and 1996 C. fluminae was the most consumed item, constituting about 90% of the diet. A decrease of this item intake (39%) was verified in 1997, with an increase of the vascular plants intake (26%). The diet of P. granulosus changed drastically in 1998, when it became based on algae (49%) and vascular plants (45). These results indicate the important role played by water level fluctuations in reservoirs, on the food availability for P. granulosus. |
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Alterations in the Pterodoras granulosus (Valenciennes, 1833) (Osteichthyes, Doradidae) diet due to the abundance variation of a bivalve invader species in the Itaipu Reservoir, BrazilAlterações na dieta de Pterodoras granulosus (Valenciennes, 1833) (Osteichthyes, Doradidae) devido a variação na abundância de uma espécie invasora de bivalve no reservatório de Itaipu, BrasildietaPterodoras granulosusBivalviareservatório de Itaipu2.00.00.00-6 Ciências BiológicasVariations in the diet of Pterodoras granulosus (Osteichthyes, Doradidae) were evaluated from 1994 to 1998 taking into account two events that affected the abundance of an introduced bivalve Corbicula fluminae: (i) the abundance explosion of the bivalve in the reservoir, started in 1994 and (ii) the slaughter of the bivalve population due to fluctuations in water level, started in July 1996. Stomach contents were analyzed and results were shown considering the methods of frequency of occurrence and volumetric, combined in an alimentary index (AI). In 1994, 1995 and 1996 C. fluminae was the most consumed item, constituting about 90% of the diet. A decrease of this item intake (39%) was verified in 1997, with an increase of the vascular plants intake (26%). The diet of P. granulosus changed drastically in 1998, when it became based on algae (49%) and vascular plants (45). These results indicate the important role played by water level fluctuations in reservoirs, on the food availability for P. granulosus.Foram avaliadas as alterações na dieta de Pterodoras granulosus (Osteichthyes, Doradidae), no reservatório de Itaipu, no período de 1994 a 1998, associadas às alterações na abundância de um bivalve invasor, Corbicula fluminea, considerando-se dois eventos: (i) a explosão de C. fluminea no reservatório a partir de 1994, e (ii) a mortandade desse bivalvia em função das flutuações do nível de água a partir de julho/96. Os conteúdos estomacais, foram analisados pelos métodos de ocorrência e volumétrico, combinados no Índice Alimentar. A análise mostrou que C. fluminea foi o principal alimento nos anos de 94/95/96, representando aproximadamente 90% da dieta. Em 1997, houve uma queda no consumo de C. fluminea (39% da dieta), concomitante a um incremento no consumo de vegetal (26%), enquanto no ano de 98 a dieta foi composta basicamente por algas filamentosas (49%) e vegetal superior (45). Estes resultados evidenciam a importância da flutuação do nível da água em reservatórios sobre a disponibilidade alimentar de P. granulosus.Universidade Estadual De Maringá2008-05-13info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/231510.4025/actascibiolsci.v24i0.2315Acta Scientiarum. Biological Sciences; Vol 24 (2002); 427-432Acta Scientiarum. Biological Sciences; v. 24 (2002); 427-4321807-863X1679-9283reponame:Acta Scientiarum Biological Sciencesinstname:Universidade Estadual de Maringá (UEM)instacron:UEMporhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/2315/2283Luz, Karla Danielle Gaspar daFugi, RosemaraAbujanra, FabianeAgostinho, Angelo Antonioinfo:eu-repo/semantics/openAccess2022-11-23T17:33:23Zoai:periodicos.uem.br/ojs:article/2315Revistahttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSciPUBhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/oai||actabiol@uem.br1807-863X1679-9283opendoar:2022-11-23T17:33:23Acta Scientiarum Biological Sciences - Universidade Estadual de Maringá (UEM)false |
dc.title.none.fl_str_mv |
Alterations in the Pterodoras granulosus (Valenciennes, 1833) (Osteichthyes, Doradidae) diet due to the abundance variation of a bivalve invader species in the Itaipu Reservoir, Brazil Alterações na dieta de Pterodoras granulosus (Valenciennes, 1833) (Osteichthyes, Doradidae) devido a variação na abundância de uma espécie invasora de bivalve no reservatório de Itaipu, Brasil |
title |
Alterations in the Pterodoras granulosus (Valenciennes, 1833) (Osteichthyes, Doradidae) diet due to the abundance variation of a bivalve invader species in the Itaipu Reservoir, Brazil |
spellingShingle |
Alterations in the Pterodoras granulosus (Valenciennes, 1833) (Osteichthyes, Doradidae) diet due to the abundance variation of a bivalve invader species in the Itaipu Reservoir, Brazil Luz, Karla Danielle Gaspar da dieta Pterodoras granulosus Bivalvia reservatório de Itaipu 2.00.00.00-6 Ciências Biológicas |
title_short |
Alterations in the Pterodoras granulosus (Valenciennes, 1833) (Osteichthyes, Doradidae) diet due to the abundance variation of a bivalve invader species in the Itaipu Reservoir, Brazil |
title_full |
Alterations in the Pterodoras granulosus (Valenciennes, 1833) (Osteichthyes, Doradidae) diet due to the abundance variation of a bivalve invader species in the Itaipu Reservoir, Brazil |
title_fullStr |
Alterations in the Pterodoras granulosus (Valenciennes, 1833) (Osteichthyes, Doradidae) diet due to the abundance variation of a bivalve invader species in the Itaipu Reservoir, Brazil |
title_full_unstemmed |
Alterations in the Pterodoras granulosus (Valenciennes, 1833) (Osteichthyes, Doradidae) diet due to the abundance variation of a bivalve invader species in the Itaipu Reservoir, Brazil |
title_sort |
Alterations in the Pterodoras granulosus (Valenciennes, 1833) (Osteichthyes, Doradidae) diet due to the abundance variation of a bivalve invader species in the Itaipu Reservoir, Brazil |
author |
Luz, Karla Danielle Gaspar da |
author_facet |
Luz, Karla Danielle Gaspar da Fugi, Rosemara Abujanra, Fabiane Agostinho, Angelo Antonio |
author_role |
author |
author2 |
Fugi, Rosemara Abujanra, Fabiane Agostinho, Angelo Antonio |
author2_role |
author author author |
dc.contributor.author.fl_str_mv |
Luz, Karla Danielle Gaspar da Fugi, Rosemara Abujanra, Fabiane Agostinho, Angelo Antonio |
dc.subject.por.fl_str_mv |
dieta Pterodoras granulosus Bivalvia reservatório de Itaipu 2.00.00.00-6 Ciências Biológicas |
topic |
dieta Pterodoras granulosus Bivalvia reservatório de Itaipu 2.00.00.00-6 Ciências Biológicas |
description |
Variations in the diet of Pterodoras granulosus (Osteichthyes, Doradidae) were evaluated from 1994 to 1998 taking into account two events that affected the abundance of an introduced bivalve Corbicula fluminae: (i) the abundance explosion of the bivalve in the reservoir, started in 1994 and (ii) the slaughter of the bivalve population due to fluctuations in water level, started in July 1996. Stomach contents were analyzed and results were shown considering the methods of frequency of occurrence and volumetric, combined in an alimentary index (AI). In 1994, 1995 and 1996 C. fluminae was the most consumed item, constituting about 90% of the diet. A decrease of this item intake (39%) was verified in 1997, with an increase of the vascular plants intake (26%). The diet of P. granulosus changed drastically in 1998, when it became based on algae (49%) and vascular plants (45). These results indicate the important role played by water level fluctuations in reservoirs, on the food availability for P. granulosus. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-05-13 |
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/2315 10.4025/actascibiolsci.v24i0.2315 |
url |
http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/2315 |
identifier_str_mv |
10.4025/actascibiolsci.v24i0.2315 |
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/2315/2283 |
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 24 (2002); 427-432 Acta Scientiarum. Biological Sciences; v. 24 (2002); 427-432 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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1799317393059610624 |