Rates of oxygen uptake increase independently of changes in heart rate in late stages of development and at hatching in the green iguana, Iguana iguana

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dc.contributor.authorSartori, Marina R. [UNESP]
dc.contributor.authorAbe, Augusto S. [UNESP]
dc.contributor.authorCrossley, Dane A.
dc.contributor.authorTaylor, Edwin W. [UNESP]
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.contributor.institutionUniv North Texas Denton
dc.contributor.institutionUniv Birmingham
dc.date.accessioned2018-11-26T17:20:01Z
dc.date.available2018-11-26T17:20:01Z
dc.date.issued2017-03-01
dc.description.abstractOxygen consumption (VO2), heart rate (f(H)), heart mass (M-h) and body mass (M-b) were measured during embryonic incubation and in hatchlings of green iguana (Iguana iguana). Meanf(H) and VO2 were unvarying in early stage embryos. VO2 increased exponentially during the later stages of embryonic development, doubling by the end of incubation, whilef(H) was constant, resulting in a 2.7-fold increase in oxygen pulse. Compared to late stage embryos, the mean inactive level of VO2 in hatchlings was 1.7 fold higher, while fH was reduced by half resulting in a further 3.6 fold increase in oxygen pulse. There was an overall negative correlation between meanf(H) and VO2 when data from hatchlings was included. Thus, predicting metabolic rate as VO2 from measurements of f(H) is not possible in embryonic reptiles. Convective transport of oxygen to supply metabolism during embryonic incubation was more reliably indicated as an index of cardiac output (COi) derived from the product of f(H) and Mb. However, a thorough analysis of factors determining rates of oxygen supply during development and eclosion in reptiles will require cannulation of blood vessels that proved impossible in the present study, to determine oxygen carrying capacity by the blood and arteriovenous oxygen content difference (A-V cliff), plus patterns of blood flow. (C) 2016 Elsevier Inc. All rights reserved.en
dc.description.affiliationUniv Estadual Paulista, Inst Biociencias, Dept Zool, Campus Rio Claro, BR-13506900 Sao Paulo, SP, Brazil
dc.description.affiliationUniv North Texas Denton, Dev Integrat Biol Cluster, Dept Biol Sci, Denton, TX 76203 USA
dc.description.affiliationUniv Birmingham, Sch Biosci, Birmingham B15 2TT, W Midlands, England
dc.description.affiliationUnespUniv Estadual Paulista, Inst Biociencias, Dept Zool, Campus Rio Claro, BR-13506900 Sao Paulo, SP, Brazil
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.sponsorshipNational Science Foundation
dc.description.sponsorshipIdFAPESP: 2010/51995-4
dc.description.sponsorshipIdFAPESP: 2012/06938-8
dc.description.sponsorshipIdFAPESP: 2012/16537-0
dc.description.sponsorshipIdCNPq: CNPq 401061/2014-0
dc.description.sponsorshipIdNational Science Foundation: IBN-10S 0845741
dc.format.extent28-34
dc.identifierhttp://dx.doi.org/10.1016/j.cbpa.2016.12.020
dc.identifier.citationComparative Biochemistry And Physiology A-molecular & Integrative Physiology. New York: Elsevier Science Inc, v. 205, p. 28-34, 2017.
dc.identifier.doi10.1016/j.cbpa.2016.12.020
dc.identifier.fileWOS000394478100004.pdf
dc.identifier.issn1095-6433
dc.identifier.urihttp://hdl.handle.net/11449/162501
dc.identifier.wosWOS:000394478100004
dc.language.isoeng
dc.publisherElsevier B.V.
dc.relation.ispartofComparative Biochemistry And Physiology A-molecular & Integrative Physiology
dc.relation.ispartofsjr0,836
dc.rights.accessRightsAcesso aberto
dc.sourceWeb of Science
dc.subjectIguana
dc.subjectReptile
dc.subjectEmbryo
dc.subjectGrowth
dc.subjectOxygen uptake
dc.subjectHeart rate
dc.subjectOxygen pulse
dc.titleRates of oxygen uptake increase independently of changes in heart rate in late stages of development and at hatching in the green iguana, Iguana iguanaen
dc.typeArtigo
dcterms.licensehttp://www.elsevier.com/about/open-access/open-access-policies/article-posting-policy
dcterms.rightsHolderElsevier B.V.
unesp.author.lattes8776757457144680[2]
unesp.author.orcid0000-0002-6765-8726[2]

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Artigos - Zoologia - IBRC