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

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dc.contributor.authorGuagnoni, Igor Noll [UNESP]
dc.contributor.authorArmelin, Vinicius Araújo [UNESP]
dc.contributor.authorda Silva Braga, Victor Hugo [UNESP]
dc.contributor.authorRantin, Francisco Tadeu
dc.contributor.authorFlorindo, Luiz Henrique [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniversidade de São Paulo (USP)
dc.contributor.institutionUniversidade Federal de São Carlos (UFSCar)
dc.contributor.institutionFAPESP/CNPq)
dc.date.accessioned2021-06-25T10:34:48Z
dc.date.available2021-06-25T10:34:48Z
dc.date.issued2021-01-01
dc.description.abstractCardiorespiratory 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.en
dc.description.affiliationDepartment of Zoology and Botany Institute of Biosciences Languages and Exact Sciences São Paulo State University (UNESP), Rua Cristóvão Colombo, 2265
dc.description.affiliationDepartment of Physiology Institute of Biosciences University of São Paulo (USP), Rua do Matão, Travessa 14, 321
dc.description.affiliationDepartment of Physiological Sciences Federal University of São Carlos (UFSCar), Rodovia Washington Luiz, km 235
dc.description.affiliationAquaculture Center (CAUNESP) São Paulo State University (UNESP), Rodovia Prof. Paulo Donato Castellane, n/n
dc.description.affiliationNational Institute of Science and Technology in Comparative Physiology (INCT FAPESP/CNPq)
dc.description.affiliationUnespDepartment of Zoology and Botany Institute of Biosciences Languages and Exact Sciences São Paulo State University (UNESP), Rua Cristóvão Colombo, 2265
dc.description.affiliationUnespAquaculture Center (CAUNESP) São Paulo State University (UNESP), Rodovia Prof. Paulo Donato Castellane, n/n
dc.description.sponsorshipFundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdFAPESP: 2008/57712-4
dc.description.sponsorshipIdCNPq: 2008/57712-4
dc.description.sponsorshipIdFAPESP: 2017/01616-6
dc.format.extent55-67
dc.identifierhttp://dx.doi.org/10.1007/s00360-020-01317-x
dc.identifier.citationJournal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology, v. 191, n. 1, p. 55-67, 2021.
dc.identifier.doi10.1007/s00360-020-01317-x
dc.identifier.issn0174-1578
dc.identifier.scopus2-s2.0-85091740102
dc.identifier.urihttp://hdl.handle.net/11449/206588
dc.language.isoeng
dc.relation.ispartofJournal of Comparative Physiology B: Biochemical, Systemic, and Environmental Physiology
dc.sourceScopus
dc.subjectAutonomic nervous system
dc.subjectCardiorespiratory adjustments
dc.subjectDigestion
dc.subjectPostprandial tachycardia
dc.subjectSpecific dynamic action
dc.titlePostprandial cardiorespiratory responses and the regulation of digestion-associated tachycardia in Nile tilapia (Oreochromis niloticus)en
dc.typeArtigo
unesp.author.orcid0000-0003-2168-757X[1]
unesp.author.orcid0000-0003-3933-9346[2]
unesp.author.orcid0000-0002-2385-2252[3]
unesp.author.orcid0000-0002-3697-278X[4]
unesp.author.orcid0000-0001-9430-8935[5]

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Jaboticabal - CAUNESP - Centro de Aquicultura da Unesp