Ventilation and gas exchange in two turtles: Podocnemis unifilis and Phrynops geoffroanus (Testudines: Pleurodira)

Detalhes bibliográficos
Autor(a) principal: Cordeiro, Tabata E. F.
Data de Publicação: 2016
Outros Autores: Abe, Augusto S. [UNESP], Klein, Wilfried
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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spelling 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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