Ventilation and gas exchange in two turtles: Podocnemis unifilis and Phrynops geoffroanus (Testudines: Pleurodira)
Autor(a) principal: | |
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Data de Publicação: | 2016 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.resp.2014.12.010 http://hdl.handle.net/11449/158795 |
Resumo: | Turtles (Testudines) have two major taxa, Pleurodira and Cryptodira. To date, only limited data are available regarding the respiratory physiology of pleurodirans. To begin to address this, we studied ventilation and gas exchange in Podocnemis unifilis and Phrynops geoffroanus. Breathing pattern in both species could be described as episodic with breathing episodes separated by large non-ventilatory periods. We measured duration of inspiration and expiration, breathing frequency, duration of the non-ventilatory period (time between episodes), tidal volume, and oxygen consumption when breathing normoxia, hypoxia and hypercarbia at 25 degrees C. In both species hypercarbia caused a greater increase in ventilation compared to hypoxia, increasing both breathing frequency and tidal volume. Minute ventilation and oxygen consumption in P. geoffroanus were the lowest described so far in testudines, indicating either extra-pulmonary gas exchange or a significantly lower metabolism. Oxidative costs of breathing, estimated using the regression method, was the highest described so far for any reptile. Further studies are necessary to better understand respiratory physiology in Phrynops and Podocnemis species. (C) 2014 Elsevier B.V. All rights reserved. |
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Ventilation and gas exchange in two turtles: Podocnemis unifilis and Phrynops geoffroanus (Testudines: Pleurodira)NormoxiaHypoxiaHypercarbiaOxygen consumptionCost of breathingReptiliaTurtles (Testudines) have two major taxa, Pleurodira and Cryptodira. To date, only limited data are available regarding the respiratory physiology of pleurodirans. To begin to address this, we studied ventilation and gas exchange in Podocnemis unifilis and Phrynops geoffroanus. Breathing pattern in both species could be described as episodic with breathing episodes separated by large non-ventilatory periods. We measured duration of inspiration and expiration, breathing frequency, duration of the non-ventilatory period (time between episodes), tidal volume, and oxygen consumption when breathing normoxia, hypoxia and hypercarbia at 25 degrees C. In both species hypercarbia caused a greater increase in ventilation compared to hypoxia, increasing both breathing frequency and tidal volume. Minute ventilation and oxygen consumption in P. geoffroanus were the lowest described so far in testudines, indicating either extra-pulmonary gas exchange or a significantly lower metabolism. Oxidative costs of breathing, estimated using the regression method, was the highest described so far for any reptile. Further studies are necessary to better understand respiratory physiology in Phrynops and Podocnemis species. (C) 2014 Elsevier B.V. All rights reserved.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Coordenação de Aperfeiçoamento de Pessoal de Nível Superior (CAPES)Univ Fed Bahia, Master Program Anim Div, BR-41170290 Salvador, BA, BrazilState Univ Sao Paulo, Rio Claro, BrazilNatl Inst Sci & Technol Comparat Physiol, Sao Paulo, BrazilUniv Sao Paulo, Sch Philosophy Sci & Literature Ribeirao Preto, Av Bandeirantes 3900,Bairro Monte Alegre, BR-14040901 Ribeirao Preto, SP, BrazilState Univ Sao Paulo, Rio Claro, BrazilFAPESP: 2012/18652-1FAPESP: 2008/57712-4CNPq: 573921/2008-3Elsevier B.V.Universidade Federal da Bahia (UFBA)Universidade Estadual Paulista (Unesp)Natl Inst Sci & Technol Comparat PhysiolUniversidade de São Paulo (USP)Cordeiro, Tabata E. F.Abe, Augusto S. [UNESP]Klein, Wilfried2018-11-26T15:29:13Z2018-11-26T15:29:13Z2016-04-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article125-131application/pdfhttp://dx.doi.org/10.1016/j.resp.2014.12.010Respiratory Physiology & Neurobiology. Amsterdam: Elsevier Science Bv, v. 224, p. 125-131, 2016.1569-9048http://hdl.handle.net/11449/15879510.1016/j.resp.2014.12.010WOS:000373540800015WOS000373540800015.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengRespiratory Physiology & Neurobiology0,682info:eu-repo/semantics/openAccess2024-01-12T06:22:18Zoai:repositorio.unesp.br:11449/158795Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T22:44:16.228135Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Ventilation and gas exchange in two turtles: Podocnemis unifilis and Phrynops geoffroanus (Testudines: Pleurodira) |
title |
Ventilation and gas exchange in two turtles: Podocnemis unifilis and Phrynops geoffroanus (Testudines: Pleurodira) |
spellingShingle |
Ventilation and gas exchange in two turtles: Podocnemis unifilis and Phrynops geoffroanus (Testudines: Pleurodira) Cordeiro, Tabata E. F. Normoxia Hypoxia Hypercarbia Oxygen consumption Cost of breathing Reptilia |
title_short |
Ventilation and gas exchange in two turtles: Podocnemis unifilis and Phrynops geoffroanus (Testudines: Pleurodira) |
title_full |
Ventilation and gas exchange in two turtles: Podocnemis unifilis and Phrynops geoffroanus (Testudines: Pleurodira) |
title_fullStr |
Ventilation and gas exchange in two turtles: Podocnemis unifilis and Phrynops geoffroanus (Testudines: Pleurodira) |
title_full_unstemmed |
Ventilation and gas exchange in two turtles: Podocnemis unifilis and Phrynops geoffroanus (Testudines: Pleurodira) |
title_sort |
Ventilation and gas exchange in two turtles: Podocnemis unifilis and Phrynops geoffroanus (Testudines: Pleurodira) |
author |
Cordeiro, Tabata E. F. |
author_facet |
Cordeiro, Tabata E. F. Abe, Augusto S. [UNESP] Klein, Wilfried |
author_role |
author |
author2 |
Abe, Augusto S. [UNESP] Klein, Wilfried |
author2_role |
author author |
dc.contributor.none.fl_str_mv |
Universidade Federal da Bahia (UFBA) Universidade Estadual Paulista (Unesp) Natl Inst Sci & Technol Comparat Physiol Universidade de São Paulo (USP) |
dc.contributor.author.fl_str_mv |
Cordeiro, Tabata E. F. Abe, Augusto S. [UNESP] Klein, Wilfried |
dc.subject.por.fl_str_mv |
Normoxia Hypoxia Hypercarbia Oxygen consumption Cost of breathing Reptilia |
topic |
Normoxia Hypoxia Hypercarbia Oxygen consumption Cost of breathing Reptilia |
description |
Turtles (Testudines) have two major taxa, Pleurodira and Cryptodira. To date, only limited data are available regarding the respiratory physiology of pleurodirans. To begin to address this, we studied ventilation and gas exchange in Podocnemis unifilis and Phrynops geoffroanus. Breathing pattern in both species could be described as episodic with breathing episodes separated by large non-ventilatory periods. We measured duration of inspiration and expiration, breathing frequency, duration of the non-ventilatory period (time between episodes), tidal volume, and oxygen consumption when breathing normoxia, hypoxia and hypercarbia at 25 degrees C. In both species hypercarbia caused a greater increase in ventilation compared to hypoxia, increasing both breathing frequency and tidal volume. Minute ventilation and oxygen consumption in P. geoffroanus were the lowest described so far in testudines, indicating either extra-pulmonary gas exchange or a significantly lower metabolism. Oxidative costs of breathing, estimated using the regression method, was the highest described so far for any reptile. Further studies are necessary to better understand respiratory physiology in Phrynops and Podocnemis species. (C) 2014 Elsevier B.V. All rights reserved. |
publishDate |
2016 |
dc.date.none.fl_str_mv |
2016-04-01 2018-11-26T15:29:13Z 2018-11-26T15:29:13Z |
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.resp.2014.12.010 Respiratory Physiology & Neurobiology. Amsterdam: Elsevier Science Bv, v. 224, p. 125-131, 2016. 1569-9048 http://hdl.handle.net/11449/158795 10.1016/j.resp.2014.12.010 WOS:000373540800015 WOS000373540800015.pdf |
url |
http://dx.doi.org/10.1016/j.resp.2014.12.010 http://hdl.handle.net/11449/158795 |
identifier_str_mv |
Respiratory Physiology & Neurobiology. Amsterdam: Elsevier Science Bv, v. 224, p. 125-131, 2016. 1569-9048 10.1016/j.resp.2014.12.010 WOS:000373540800015 WOS000373540800015.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Respiratory Physiology & Neurobiology 0,682 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
125-131 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) |
repository.mail.fl_str_mv |
|
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1808129456762519552 |