Effects of oxygen level on thermal tolerance in Amazonian catfishes with bimodal respiration: physiological and behavioural changes

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorBrazilian National Institute for Research of the Amazon–INPA-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.contributorAcaraú Valley State University-
Autor(es): dc.creatorde Lima, Mayara Cristina Moraes-
Autor(es): dc.creatorCampos, Derek Felipe-
Autor(es): dc.creatorKochhann, Daiani-
Autor(es): dc.creatorVal, Adalberto Luis-
Data de aceite: dc.date.accessioned2025-08-21T21:45:50Z-
Data de disponibilização: dc.date.available2025-08-21T21:45:50Z-
Data de envio: dc.date.issued2025-04-29-
Data de envio: dc.date.issued2025-01-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1242/jeb.247610-
Fonte completa do material: dc.identifierhttps://hdl.handle.net/11449/297327-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/297327-
Descrição: dc.descriptionThe degree of tolerance to adverse conditions ultimately shapes a species’ vulnerability to environmental changes. Some studies have reported limited thermal tolerance due to hypoxia in fish employing aquatic respiration. However, there is a lack of information regarding the effects of hypoxia on thermal tolerance in fish exhibiting bimodal respiration. A set of Amazonian fish species has adaptations to breathe air when oxygen in water is not enough to fulfil demand. Additionally, loricariid species within this group possess stomach adaptations for air breathing. The Loricariidae family exhibits varying stomach types and observed morphological differences could influence their ability to obtain oxygen from the air. This ability may, in turn, have consequences for the thermal tolerance of these species. Our objective was to assess the effects of hypoxia on thermal tolerance, along with the physiological (whole-animal metabolic rates and mitochondrial respiration) and behavioural mechanisms involved, in two facultative air-breathing species: Pterygoplichthys pardalis and Ancistrus dolichopterus. These species showcase morphological distinctions in their stomachs, with the former having a higher capacity to obtain oxygen from the air. Thermal tolerance in P. pardalis remained unaffected by dissolved oxygen in the water when air access was available but decreased when access to the water surface was restricted, specifically in hypoxic conditions. Conversely, the thermal tolerance of A. dolichopterus decreased below the critical oxygen partial pressure (Pcrit), even with access to air, highlighting their limited ability to obtain oxygen through their adapted stomach. Our results underscore that air breathing enhances thermal tolerance, but this effect is prominent only in species with a higher capacity for air breathing.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado do Amazonas-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionLaboratory of Ecophysiology and Molecular Evolution Brazilian National Institute for Research of the Amazon–INPA-
Descrição: dc.descriptionLaboratory of Integrative Thermal Physiology Department of Animal Morphology and Physiology Saõ Paulo State University -UNESP FCAV, Jaboticabal-
Descrição: dc.descriptionLaboratory of Behavioural Ecophysiology Center of Agrarian and Biological Sciences Acaraú Valley State University, Ceará-
Descrição: dc.descriptionLaboratory of Integrative Thermal Physiology Department of Animal Morphology and Physiology Saõ Paulo State University -UNESP FCAV, Jaboticabal-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado do Amazonas: 062.01187/2017-
Descrição: dc.descriptionCNPq: 465540/2014-7-
Idioma: dc.languageen-
Relação: dc.relationJournal of Experimental Biology-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectAgitation temperature-
Palavras-chave: dc.subjectAir-breathing fish-
Palavras-chave: dc.subjectAmazon-
Palavras-chave: dc.subjectCritical thermal maxima-
Palavras-chave: dc.subjectHypoxia-
Título: dc.titleEffects of oxygen level on thermal tolerance in Amazonian catfishes with bimodal respiration: physiological and behavioural changes-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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