FEEDING ECOLOGY OF Astyanax lacustris (OSTEICHTHYES: CHARACIDAE) FROM LAGOA DO PIATÓ, ASSU, RIO GRANDE DO NORTE, BRAZIL
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Biota Amazônia |
Texto Completo: | https://periodicos.unifap.br/index.php/biota/article/view/467 |
Resumo: | This study reports on the stomach content analyses of the Astyanax lacustris captured on a monthly basis from Lagoa do Piató, Assu, Rio Grande do Norte, Brazil, during the period of September, 2006 to August, 2007. The fish were captured using gillnets of4 cm mesh size. The total length, standard length, body mass and stomach weight were registered for each fish. The stomach contents analyses of 360 fishes were carried out based on volumetric method, points, frequency of occurrence and applying the Relative Importance Index. The degrees of repletion of the stomachs were determined and the Repletion Index was calculated. The diet variations and frequency of ingestion were related to the rainfall and limnological parameters. The food items identified were separated into distinct groups according to their origin. It is concluded that this species shows an omnivorous feeding habit with a tendency towards insectivory, with intensive feeding during the dry season. The concentration of dissolved oxygen was more closely related to.feeding activity than the rainfall and the other physico-chemical factors of the water.Keywords: diet; fish; insectivory; lake; dry season. |
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FEEDING ECOLOGY OF Astyanax lacustris (OSTEICHTHYES: CHARACIDAE) FROM LAGOA DO PIATÓ, ASSU, RIO GRANDE DO NORTE, BRAZILECOLOGIA ALIMENTAR DE Astyanax lacustris (OSTEICHTHYES: CHARACIDAE) NA LAGOA DO PIATÓ, ASSU, RIO GRANDE DO NORTE, BRASILThis study reports on the stomach content analyses of the Astyanax lacustris captured on a monthly basis from Lagoa do Piató, Assu, Rio Grande do Norte, Brazil, during the period of September, 2006 to August, 2007. The fish were captured using gillnets of4 cm mesh size. The total length, standard length, body mass and stomach weight were registered for each fish. The stomach contents analyses of 360 fishes were carried out based on volumetric method, points, frequency of occurrence and applying the Relative Importance Index. The degrees of repletion of the stomachs were determined and the Repletion Index was calculated. The diet variations and frequency of ingestion were related to the rainfall and limnological parameters. The food items identified were separated into distinct groups according to their origin. It is concluded that this species shows an omnivorous feeding habit with a tendency towards insectivory, with intensive feeding during the dry season. The concentration of dissolved oxygen was more closely related to.feeding activity than the rainfall and the other physico-chemical factors of the water.Keywords: diet; fish; insectivory; lake; dry season.O presente trabalho baseia-se na análise do conteúdo estomacal de Astyanax lacustris, capturados mensalmente no período de setembro de 2006 a agosto de 2007 na Lagoa do Piató, Assu, Rio Grande do Norte, Brasil. Como instrumento de captura utilizou-se rede de espera com malha de 4 cm entrenós. Foram obtidos de cada exemplar o comprimento total, comprimento padrão, massa corporal total e peso do estômago. A análise do conteúdo estomacal de 360 peixes foi realizada de acordo com o método volumétrico, de pontos e o método de frequência de ocorrência, aplicando-se sobre este o Índice de Importância Alimentar. Os estômagos tiveram o grau de repleção determinado e foi calculado o Índice de Repleção. As variações na dieta e a frequência de ingestão alimentar foram relacionadas com a pluviosidade e os fatores limnológicos. Os itens alimentares identificados foram separados em grupos distintos de acordo com a sua origem. Concluiu-se que a espécie apresenta hábito alimentar onívoro, com tendência à insetivoria e com maior atividade alimentar durante a estiagem. A concentração do oxigênio dissolvido teve maior relação com a frequência de alimentação do que a pluviosidade e os demais fatores físico-químicos da água.Palavras-chave: dieta, peixe, insetivoria, lagoa, estiagem. Universidade Federal do AmapáCNPQ, CAPESda Silva, Danyelle AlvesPessoa, Emilly Kataline Rodriguesda Costa, Simone Almeida Gavilan LeandroChellappa, Naithirithi TiruvenkatacharyChellappa, Sathyabama2012-07-31info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArtigo Avaliado pelos Paresapplication/pdfhttps://periodicos.unifap.br/index.php/biota/article/view/46710.18561/2179-5746/biotaamazonia.v2n1p74-82Biota Amazônia (Biote Amazonie, Biota Amazonia, Amazonian Biota); v. 2, n. 1 (2012); 74-822179-5746reponame:Biota Amazôniainstname:Universidade Federal do Amapá (UNIFAP)instacron:UNIFAPporhttps://periodicos.unifap.br/index.php/biota/article/view/467/v2n1p74-82.pdfDireitos autorais 2012 Biota Amazônia (Biote Amazonie, Biota Amazonia, Amazonian Biota)http://creativecommons.org/licenses/by/4.0info:eu-repo/semantics/openAccess2016-04-18T20:33:22Zoai:ojs.pkp.sfu.ca:article/467Revistahttp://periodicos.unifap.br/index.php/biotaONGhttps://periodicos.unifap.br/index.php/biota/oai||juliosa@unifap.br2179-57462179-5746opendoar:2016-04-18T20:33:22Biota Amazônia - Universidade Federal do Amapá (UNIFAP)false |
dc.title.none.fl_str_mv |
FEEDING ECOLOGY OF Astyanax lacustris (OSTEICHTHYES: CHARACIDAE) FROM LAGOA DO PIATÓ, ASSU, RIO GRANDE DO NORTE, BRAZIL ECOLOGIA ALIMENTAR DE Astyanax lacustris (OSTEICHTHYES: CHARACIDAE) NA LAGOA DO PIATÓ, ASSU, RIO GRANDE DO NORTE, BRASIL |
title |
FEEDING ECOLOGY OF Astyanax lacustris (OSTEICHTHYES: CHARACIDAE) FROM LAGOA DO PIATÓ, ASSU, RIO GRANDE DO NORTE, BRAZIL |
spellingShingle |
FEEDING ECOLOGY OF Astyanax lacustris (OSTEICHTHYES: CHARACIDAE) FROM LAGOA DO PIATÓ, ASSU, RIO GRANDE DO NORTE, BRAZIL da Silva, Danyelle Alves |
title_short |
FEEDING ECOLOGY OF Astyanax lacustris (OSTEICHTHYES: CHARACIDAE) FROM LAGOA DO PIATÓ, ASSU, RIO GRANDE DO NORTE, BRAZIL |
title_full |
FEEDING ECOLOGY OF Astyanax lacustris (OSTEICHTHYES: CHARACIDAE) FROM LAGOA DO PIATÓ, ASSU, RIO GRANDE DO NORTE, BRAZIL |
title_fullStr |
FEEDING ECOLOGY OF Astyanax lacustris (OSTEICHTHYES: CHARACIDAE) FROM LAGOA DO PIATÓ, ASSU, RIO GRANDE DO NORTE, BRAZIL |
title_full_unstemmed |
FEEDING ECOLOGY OF Astyanax lacustris (OSTEICHTHYES: CHARACIDAE) FROM LAGOA DO PIATÓ, ASSU, RIO GRANDE DO NORTE, BRAZIL |
title_sort |
FEEDING ECOLOGY OF Astyanax lacustris (OSTEICHTHYES: CHARACIDAE) FROM LAGOA DO PIATÓ, ASSU, RIO GRANDE DO NORTE, BRAZIL |
author |
da Silva, Danyelle Alves |
author_facet |
da Silva, Danyelle Alves Pessoa, Emilly Kataline Rodrigues da Costa, Simone Almeida Gavilan Leandro Chellappa, Naithirithi Tiruvenkatachary Chellappa, Sathyabama |
author_role |
author |
author2 |
Pessoa, Emilly Kataline Rodrigues da Costa, Simone Almeida Gavilan Leandro Chellappa, Naithirithi Tiruvenkatachary Chellappa, Sathyabama |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
CNPQ, CAPES |
dc.contributor.author.fl_str_mv |
da Silva, Danyelle Alves Pessoa, Emilly Kataline Rodrigues da Costa, Simone Almeida Gavilan Leandro Chellappa, Naithirithi Tiruvenkatachary Chellappa, Sathyabama |
description |
This study reports on the stomach content analyses of the Astyanax lacustris captured on a monthly basis from Lagoa do Piató, Assu, Rio Grande do Norte, Brazil, during the period of September, 2006 to August, 2007. The fish were captured using gillnets of4 cm mesh size. The total length, standard length, body mass and stomach weight were registered for each fish. The stomach contents analyses of 360 fishes were carried out based on volumetric method, points, frequency of occurrence and applying the Relative Importance Index. The degrees of repletion of the stomachs were determined and the Repletion Index was calculated. The diet variations and frequency of ingestion were related to the rainfall and limnological parameters. The food items identified were separated into distinct groups according to their origin. It is concluded that this species shows an omnivorous feeding habit with a tendency towards insectivory, with intensive feeding during the dry season. The concentration of dissolved oxygen was more closely related to.feeding activity than the rainfall and the other physico-chemical factors of the water.Keywords: diet; fish; insectivory; lake; dry season. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-07-31 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Artigo Avaliado pelos Pares |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://periodicos.unifap.br/index.php/biota/article/view/467 10.18561/2179-5746/biotaamazonia.v2n1p74-82 |
url |
https://periodicos.unifap.br/index.php/biota/article/view/467 |
identifier_str_mv |
10.18561/2179-5746/biotaamazonia.v2n1p74-82 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://periodicos.unifap.br/index.php/biota/article/view/467/v2n1p74-82.pdf |
dc.rights.driver.fl_str_mv |
Direitos autorais 2012 Biota Amazônia (Biote Amazonie, Biota Amazonia, Amazonian Biota) http://creativecommons.org/licenses/by/4.0 info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Direitos autorais 2012 Biota Amazônia (Biote Amazonie, Biota Amazonia, Amazonian Biota) http://creativecommons.org/licenses/by/4.0 |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.coverage.none.fl_str_mv |
|
dc.publisher.none.fl_str_mv |
Universidade Federal do Amapá |
publisher.none.fl_str_mv |
Universidade Federal do Amapá |
dc.source.none.fl_str_mv |
Biota Amazônia (Biote Amazonie, Biota Amazonia, Amazonian Biota); v. 2, n. 1 (2012); 74-82 2179-5746 reponame:Biota Amazônia instname:Universidade Federal do Amapá (UNIFAP) instacron:UNIFAP |
instname_str |
Universidade Federal do Amapá (UNIFAP) |
instacron_str |
UNIFAP |
institution |
UNIFAP |
reponame_str |
Biota Amazônia |
collection |
Biota Amazônia |
repository.name.fl_str_mv |
Biota Amazônia - Universidade Federal do Amapá (UNIFAP) |
repository.mail.fl_str_mv |
||juliosa@unifap.br |
_version_ |
1800218368998899712 |