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

Detalhes bibliográficos
Autor(a) principal: Sartori, Marina R. [UNESP]
Data de Publicação: 2017
Outros Autores: Abe, Augusto S. [UNESP], Crossley, Dane A., Taylor, Edwin W. [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1016/j.cbpa.2016.12.020
http://hdl.handle.net/11449/162501
Resumo: Oxygen 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.
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spelling Rates of oxygen uptake increase independently of changes in heart rate in late stages of development and at hatching in the green iguana, Iguana iguanaIguanaReptileEmbryoGrowthOxygen uptakeHeart rateOxygen pulseOxygen 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.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)National Science FoundationUniv Estadual Paulista, Inst Biociencias, Dept Zool, Campus Rio Claro, BR-13506900 Sao Paulo, SP, BrazilUniv North Texas Denton, Dev Integrat Biol Cluster, Dept Biol Sci, Denton, TX 76203 USAUniv Birmingham, Sch Biosci, Birmingham B15 2TT, W Midlands, EnglandUniv Estadual Paulista, Inst Biociencias, Dept Zool, Campus Rio Claro, BR-13506900 Sao Paulo, SP, BrazilFAPESP: 2010/51995-4FAPESP: 2012/06938-8FAPESP: 2012/16537-0CNPq: CNPq 401061/2014-0National Science Foundation: IBN-10S 0845741Elsevier B.V.Universidade Estadual Paulista (Unesp)Univ North Texas DentonUniv BirminghamSartori, Marina R. [UNESP]Abe, Augusto S. [UNESP]Crossley, Dane A.Taylor, Edwin W. [UNESP]2018-11-26T17:20:01Z2018-11-26T17:20:01Z2017-03-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article28-34application/pdfhttp://dx.doi.org/10.1016/j.cbpa.2016.12.020Comparative Biochemistry And Physiology A-molecular & Integrative Physiology. New York: Elsevier Science Inc, v. 205, p. 28-34, 2017.1095-6433http://hdl.handle.net/11449/16250110.1016/j.cbpa.2016.12.020WOS:000394478100004WOS000394478100004.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengComparative Biochemistry And Physiology A-molecular & Integrative Physiology0,836info:eu-repo/semantics/openAccess2023-11-18T06:14:32Zoai:repositorio.unesp.br:11449/162501Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T18:04:36.176529Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv 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
title 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
spellingShingle 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
Sartori, Marina R. [UNESP]
Iguana
Reptile
Embryo
Growth
Oxygen uptake
Heart rate
Oxygen pulse
title_short 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
title_full 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
title_fullStr 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
title_full_unstemmed 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
title_sort 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
author Sartori, Marina R. [UNESP]
author_facet Sartori, Marina R. [UNESP]
Abe, Augusto S. [UNESP]
Crossley, Dane A.
Taylor, Edwin W. [UNESP]
author_role author
author2 Abe, Augusto S. [UNESP]
Crossley, Dane A.
Taylor, Edwin W. [UNESP]
author2_role author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
Univ North Texas Denton
Univ Birmingham
dc.contributor.author.fl_str_mv Sartori, Marina R. [UNESP]
Abe, Augusto S. [UNESP]
Crossley, Dane A.
Taylor, Edwin W. [UNESP]
dc.subject.por.fl_str_mv Iguana
Reptile
Embryo
Growth
Oxygen uptake
Heart rate
Oxygen pulse
topic Iguana
Reptile
Embryo
Growth
Oxygen uptake
Heart rate
Oxygen pulse
description Oxygen 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.
publishDate 2017
dc.date.none.fl_str_mv 2017-03-01
2018-11-26T17:20:01Z
2018-11-26T17:20:01Z
dc.type.status.fl_str_mv info:eu-repo/semantics/publishedVersion
dc.type.driver.fl_str_mv info:eu-repo/semantics/article
format article
status_str publishedVersion
dc.identifier.uri.fl_str_mv http://dx.doi.org/10.1016/j.cbpa.2016.12.020
Comparative Biochemistry And Physiology A-molecular & Integrative Physiology. New York: Elsevier Science Inc, v. 205, p. 28-34, 2017.
1095-6433
http://hdl.handle.net/11449/162501
10.1016/j.cbpa.2016.12.020
WOS:000394478100004
WOS000394478100004.pdf
url http://dx.doi.org/10.1016/j.cbpa.2016.12.020
http://hdl.handle.net/11449/162501
identifier_str_mv Comparative Biochemistry And Physiology A-molecular & Integrative Physiology. New York: Elsevier Science Inc, v. 205, p. 28-34, 2017.
1095-6433
10.1016/j.cbpa.2016.12.020
WOS:000394478100004
WOS000394478100004.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Comparative Biochemistry And Physiology A-molecular & Integrative Physiology
0,836
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 28-34
application/pdf
dc.publisher.none.fl_str_mv Elsevier B.V.
publisher.none.fl_str_mv Elsevier B.V.
dc.source.none.fl_str_mv Web of Science
reponame:Repositório Institucional da UNESP
instname:Universidade Estadual Paulista (UNESP)
instacron:UNESP
instname_str Universidade Estadual Paulista (UNESP)
instacron_str UNESP
institution UNESP
reponame_str Repositório Institucional da UNESP
collection Repositório Institucional da UNESP
repository.name.fl_str_mv Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)
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