Using aerobic exercise to evaluate sub-lethal tolerance of acute warming in fishes

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MetadadosDescriçãoIdioma
Autor(es): dc.contributorFederal University of Saõ Carlos-
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniversity of Texas at Austin-
Autor(es): dc.contributorUniversity of Glasgow-
Autor(es): dc.contributorUniversity of Birmingham-
Autor(es): dc.contributorIRD-
Autor(es): dc.creatorBlasco, Felipe R. [UNESP]-
Autor(es): dc.creatorEsbaugh, Andrew J.-
Autor(es): dc.creatorKillen, Shaun S.-
Autor(es): dc.creatorRantin, Francisco Tadeu-
Autor(es): dc.creatorTaylor, Edwin W.-
Autor(es): dc.creatorMcKenzie, David J.-
Data de aceite: dc.date.accessioned2022-02-22T00:30:43Z-
Data de disponibilização: dc.date.available2022-02-22T00:30:43Z-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-12-11-
Data de envio: dc.date.issued2020-05-01-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1242/jeb.218602-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/200457-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/200457-
Descrição: dc.descriptionWe investigated whether fatigue from sustained aerobic swimming provides a sub-lethal endpoint to define tolerance of acute warming in fishes, as an alternative to loss of equilibrium (LOE) during a critical thermal maximum (CTmax) protocol. Two species were studied, Nile tilapia (Oreochromis niloticus) and pacu (Piaractus mesopotamicus). Each fish underwent an incremental swim test to determine gait transition speed (UGT), where it first engaged the unsteady anaerobic swimming mode that preceded fatigue. After suitable recovery, each fish was exercised at 85% of their own UGT and warmed 1°C every 30 min, to identify the temperature at which they fatigued, denoted as CTswim. Fish were also submitted to a standard CTmax, warming at the same rate as CTswim, under static conditions until LOE. All individuals fatigued in CTswim, at a mean temperature approximately 2°C lower than their CTmax. Therefore, if exposed to acute warming in the wild, the ability to perform aerobic metabolic work would be constrained at temperatures significantly below those that directly threatened survival. The collapse in performance at CTswim was preceded by a gait transition qualitatively indistinguishable from that during the incremental swim test. This suggests that fatigue in CTswim was linked to an inability to meet the tissue oxygen demands of exercise plus warming. This is consistent with the oxygen and capacity limited thermal tolerance (OCLTT) hypothesis, regarding the mechanism underlying tolerance of warming in fishes. Overall, fatigue at CTswim provides an ecologically relevant sub-lethal threshold that is more sensitive to extreme events than LOE at CTmax-
Descrição: dc.descriptionDepartment of Physiological Sciences Federal University of Saõ Carlos-
Descrição: dc.descriptionJoint Graduate Program in Physiological Sciences Federal University of Saõ Carlos - UFSCar Saõ Paulo State University UNESP Campus Araraquara-
Descrição: dc.descriptionMarine Science Institute University of Texas at Austin-
Descrição: dc.descriptionInstitute of Biodiversity Animal Health and Comparative Medicine College of Medical Veterinary and Life Sciences University of Glasgow-
Descrição: dc.descriptionSchool of Biosciences University of Birmingham-
Descrição: dc.descriptionMARBEC Université de Montpellier CNRS Ifremer IRD-
Descrição: dc.descriptionJoint Graduate Program in Physiological Sciences Federal University of Saõ Carlos - UFSCar Saõ Paulo State University UNESP Campus Araraquara-
Idioma: dc.languageen-
Relação: dc.relationJournal of Experimental Biology-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectCTmax-
Palavras-chave: dc.subjectOreochromis niloticus-
Palavras-chave: dc.subjectPiaractus mesopotamicus-
Título: dc.titleUsing aerobic exercise to evaluate sub-lethal tolerance of acute warming in fishes-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

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