Hypoxic environments as refuge against predatory fish in the Amazonian floodplains
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional do INPA |
Texto Completo: | https://repositorio.inpa.gov.br/handle/1/14827 |
Resumo: | Several groups of Amazonian fishes exhibit behavioral, morphological and physiological characteristics that allow occupying hypoxic environments, despite the energetic costs of living in such harsh conditions. One of the supposed advantages of occupying hypoxic habitats would be a lower predation pressure resulting from a lower number of piscivorous fishes in those environments. We tested this hypothesis in an area of the Amazon River floodplain through gill net fishing in normoxic and hypoxic habitats. From the 103 species caught, 38 were classified as piscivores. We found no difference in the number of piscivorous species captured in hypoxic and normoxic habitats (χ2 = 0.23; p = 0.63; df = 1) but piscivorous individuals were more numerous in normoxic than in hypoxic sampling stations (χ2 = 104.4; p < 0.001; df = 1). This indicates that environments submitted to low oxygen conditions may in fact function as refuges against piscivorous fishes in the Amazonian floodplains. |
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Anjos, Maeda Batista dosOliveira, Renildo Ribeiro deZuanon, Jansen2020-04-24T17:09:51Z2020-04-24T17:09:51Z2008https://repositorio.inpa.gov.br/handle/1/1482710.1590/S1519-69842008000100007Several groups of Amazonian fishes exhibit behavioral, morphological and physiological characteristics that allow occupying hypoxic environments, despite the energetic costs of living in such harsh conditions. One of the supposed advantages of occupying hypoxic habitats would be a lower predation pressure resulting from a lower number of piscivorous fishes in those environments. We tested this hypothesis in an area of the Amazon River floodplain through gill net fishing in normoxic and hypoxic habitats. From the 103 species caught, 38 were classified as piscivores. We found no difference in the number of piscivorous species captured in hypoxic and normoxic habitats (χ2 = 0.23; p = 0.63; df = 1) but piscivorous individuals were more numerous in normoxic than in hypoxic sampling stations (χ2 = 104.4; p < 0.001; df = 1). This indicates that environments submitted to low oxygen conditions may in fact function as refuges against piscivorous fishes in the Amazonian floodplains.Volume 68, Número 1, Pags. 45-50Attribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/info:eu-repo/semantics/openAccessOxygenAnimalsBehavior, AnimalsBrasilClassificationFishPhysiologyRiverAnimalBehavior, AnimalsBrasilFishesOxygenRiversPiscesHypoxic environments as refuge against predatory fish in the Amazonian floodplainsinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleRevista Brasileira de Biologiaengreponame:Repositório Institucional do INPAinstname:Instituto Nacional de Pesquisas da Amazônia (INPA)instacron:INPAORIGINALartigo-inpa.pdfapplication/pdf270105https://repositorio.inpa.gov.br/bitstream/1/14827/1/artigo-inpa.pdf1c4a5c4b13723ac11b74ada2bc9c3b8bMD51CC-LICENSElicense_rdfapplication/octet-stream914https://repositorio.inpa.gov.br/bitstream/1/14827/2/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD521/148272020-07-14 09:17:35.581oai:repositorio:1/14827Repositório de PublicaçõesPUBhttps://repositorio.inpa.gov.br/oai/requestopendoar:2020-07-14T13:17:35Repositório Institucional do INPA - Instituto Nacional de Pesquisas da Amazônia (INPA)false |
dc.title.en.fl_str_mv |
Hypoxic environments as refuge against predatory fish in the Amazonian floodplains |
title |
Hypoxic environments as refuge against predatory fish in the Amazonian floodplains |
spellingShingle |
Hypoxic environments as refuge against predatory fish in the Amazonian floodplains Anjos, Maeda Batista dos Oxygen Animals Behavior, Animals Brasil Classification Fish Physiology River Animal Behavior, Animals Brasil Fishes Oxygen Rivers Pisces |
title_short |
Hypoxic environments as refuge against predatory fish in the Amazonian floodplains |
title_full |
Hypoxic environments as refuge against predatory fish in the Amazonian floodplains |
title_fullStr |
Hypoxic environments as refuge against predatory fish in the Amazonian floodplains |
title_full_unstemmed |
Hypoxic environments as refuge against predatory fish in the Amazonian floodplains |
title_sort |
Hypoxic environments as refuge against predatory fish in the Amazonian floodplains |
author |
Anjos, Maeda Batista dos |
author_facet |
Anjos, Maeda Batista dos Oliveira, Renildo Ribeiro de Zuanon, Jansen |
author_role |
author |
author2 |
Oliveira, Renildo Ribeiro de Zuanon, Jansen |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Anjos, Maeda Batista dos Oliveira, Renildo Ribeiro de Zuanon, Jansen |
dc.subject.eng.fl_str_mv |
Oxygen Animals Behavior, Animals Brasil Classification Fish Physiology River Animal Behavior, Animals Brasil Fishes Oxygen Rivers Pisces |
topic |
Oxygen Animals Behavior, Animals Brasil Classification Fish Physiology River Animal Behavior, Animals Brasil Fishes Oxygen Rivers Pisces |
description |
Several groups of Amazonian fishes exhibit behavioral, morphological and physiological characteristics that allow occupying hypoxic environments, despite the energetic costs of living in such harsh conditions. One of the supposed advantages of occupying hypoxic habitats would be a lower predation pressure resulting from a lower number of piscivorous fishes in those environments. We tested this hypothesis in an area of the Amazon River floodplain through gill net fishing in normoxic and hypoxic habitats. From the 103 species caught, 38 were classified as piscivores. We found no difference in the number of piscivorous species captured in hypoxic and normoxic habitats (χ2 = 0.23; p = 0.63; df = 1) but piscivorous individuals were more numerous in normoxic than in hypoxic sampling stations (χ2 = 104.4; p < 0.001; df = 1). This indicates that environments submitted to low oxygen conditions may in fact function as refuges against piscivorous fishes in the Amazonian floodplains. |
publishDate |
2008 |
dc.date.issued.fl_str_mv |
2008 |
dc.date.accessioned.fl_str_mv |
2020-04-24T17:09:51Z |
dc.date.available.fl_str_mv |
2020-04-24T17:09:51Z |
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 |
https://repositorio.inpa.gov.br/handle/1/14827 |
dc.identifier.doi.none.fl_str_mv |
10.1590/S1519-69842008000100007 |
url |
https://repositorio.inpa.gov.br/handle/1/14827 |
identifier_str_mv |
10.1590/S1519-69842008000100007 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.ispartof.pt_BR.fl_str_mv |
Volume 68, Número 1, Pags. 45-50 |
dc.rights.driver.fl_str_mv |
Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ |
eu_rights_str_mv |
openAccess |
dc.publisher.none.fl_str_mv |
Revista Brasileira de Biologia |
publisher.none.fl_str_mv |
Revista Brasileira de Biologia |
dc.source.none.fl_str_mv |
reponame:Repositório Institucional do INPA instname:Instituto Nacional de Pesquisas da Amazônia (INPA) instacron:INPA |
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Instituto Nacional de Pesquisas da Amazônia (INPA) |
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INPA |
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INPA |
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Repositório Institucional do INPA |
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Repositório Institucional do INPA |
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