Postprandial cardiorespiratory responses and the regulation of digestion-associated tachycardia in Nile tilapia (Oreochromis niloticus)

Registro completo de metadados
MetadadosDescriçãoIdioma
Autor(es): dc.contributorUniversidade Estadual Paulista (Unesp)-
Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorUniversidade Federal de São Carlos (UFSCar)-
Autor(es): dc.contributorFAPESP/CNPq)-
Autor(es): dc.creatorGuagnoni, Igor Noll [UNESP]-
Autor(es): dc.creatorArmelin, Vinicius Araújo [UNESP]-
Autor(es): dc.creatorda Silva Braga, Victor Hugo [UNESP]-
Autor(es): dc.creatorRantin, Francisco Tadeu-
Autor(es): dc.creatorFlorindo, Luiz Henrique [UNESP]-
Data de aceite: dc.date.accessioned2022-02-22T00:47:34Z-
Data de disponibilização: dc.date.available2022-02-22T00:47:34Z-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2021-06-25-
Data de envio: dc.date.issued2020-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1007/s00360-020-01317-x-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/206588-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/206588-
Descrição: dc.descriptionCardiorespiratory adjustments that occur after feeding are essential to supply the demands of digestion in vertebrates. The well-documented postprandial tachycardia is triggered by an increase in adrenergic activity and by non-adrenergic non-cholinergic (NANC) factors in mammals and crocodilians, while it is linked to a withdrawal of vagal drive and NANC factors in non-crocodilian ectotherms—except for fish, in which the sole investigation available indicated no participation of NANC factors. On the other hand, postprandial ventilatory adjustments vary widely among air-breathing vertebrates, with different species exhibiting hyperventilation, hypoventilation, or even no changes at all. Regarding fish, which live in an environment with low oxygen capacitance that requires great ventilatory effort for oxygen uptake, data on the ventilatory consequences of feeding are also scarce. Thus, the present study sought to investigate the postprandial cardiorespiratory adjustments and the mediation of digestion-associated tachycardia in the unimodal water-breathing teleost Oreochromis niloticus. Heart rate (fH), cardiac autonomic tones, ventilation rate (fV), ventilation amplitude, total ventilation and fH/fV variability were assessed both in fasting and digesting animals under untreated condition, as well as after muscarinic cholinergic blockade with atropine and double autonomic blockade with atropine and propranolol. The results revealed that digestion was associated with marked tachycardia in O. niloticus, determined by a reduction in cardiac parasympathetic activity and by circulating NANC factors—the first time such positive chronotropes were detected in digesting fish. Unexpectedly, postprandial ventilatory alterations were not observed, although digestion triggered mechanisms that were presumed to increase oxygen uptake, such as cardiorespiratory synchrony.-
Descrição: dc.descriptionFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionDepartment of Zoology and Botany Institute of Biosciences Languages and Exact Sciences São Paulo State University (UNESP), Rua Cristóvão Colombo, 2265-
Descrição: dc.descriptionDepartment of Physiology Institute of Biosciences University of São Paulo (USP), Rua do Matão, Travessa 14, 321-
Descrição: dc.descriptionDepartment of Physiological Sciences Federal University of São Carlos (UFSCar), Rodovia Washington Luiz, km 235-
Descrição: dc.descriptionAquaculture Center (CAUNESP) São Paulo State University (UNESP), Rodovia Prof. Paulo Donato Castellane, n/n-
Descrição: dc.descriptionNational Institute of Science and Technology in Comparative Physiology (INCT FAPESP/CNPq)-
Descrição: dc.descriptionDepartment of Zoology and Botany Institute of Biosciences Languages and Exact Sciences São Paulo State University (UNESP), Rua Cristóvão Colombo, 2265-
Descrição: dc.descriptionAquaculture Center (CAUNESP) São Paulo State University (UNESP), Rodovia Prof. Paulo Donato Castellane, n/n-
Descrição: dc.descriptionFAPESP: 2008/57712-4-
Descrição: dc.descriptionCNPq: 2008/57712-4-
Descrição: dc.descriptionFAPESP: 2017/01616-6-
Formato: dc.format55-67-
Idioma: dc.languageen-
Relação: dc.relationJournal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectAutonomic nervous system-
Palavras-chave: dc.subjectCardiorespiratory adjustments-
Palavras-chave: dc.subjectDigestion-
Palavras-chave: dc.subjectPostprandial tachycardia-
Palavras-chave: dc.subjectSpecific dynamic action-
Título: dc.titlePostprandial cardiorespiratory responses and the regulation of digestion-associated tachycardia in Nile tilapia (Oreochromis niloticus)-
Tipo de arquivo: dc.typelivro digital-
Aparece nas coleções:Repositório Institucional - Unesp

Não existem arquivos associados a este item.