Acute effects of temperature and hypercarbia on cutaneous and branchial gas exchange in the South American lungfish, Lepidosiren paradoxa
Autor(a) principal: | |
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Data de Publicação: | 2017 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.jtherbio.2016.12.001 http://hdl.handle.net/11449/162390 |
Resumo: | The South American lungfish, Lepidosiren paradoxa inhabits seasonal environments in the Central Amazon and Parana-Paraguay basins that undergo significant oscillations in temperature throughout the year. They rely on different gas exchange organs, such as gills and skin for aquatic gas exchange while their truly bilateral lungs are responsible for aerial gas exchange; however, there are no data available on the individual contributions of the skin and the gills to total aquatic gas exchange in L. paradoxa. Thus, in the present study we quantify the relative contributions of skin and gills on total aquatic gas exchange during warm (35 degrees C) and cold exposure (20 degrees C) in addition to the effects of aerial and aquatic hypercarbia on aquatic gas exchange and gill ventilation rate (f(G); 25 degrees C), respectively. Elevated temperature (35 degrees C) caused a significant increase in the contribution of cutaneous (from 0.61 +/- 0.13 to 1.34 +/- 0.26 ml. STPD.h(-1) kg(-1)) and branchial (from 0.54 +/- 0.17 to 1.73 +/- 0.53 ml. STPD.h(-1) kg(-1)) gas exchange for (V) over dotCO(2) relative to the lower temperature (20 degrees C), while (V) over dot O-2 remained relatively unchanged. L. paradoxa exhibited a greater branchial contribution in relation to total aquatic gas exchange at lower temperatures (20 and 25 degrees C) for oxygen uptake. Aerial hypercarbia decreased branchial (V) over dot O-2 whereas branchial (V) over dotCO(2) was significantly increased. Progressive increases in aquatic hypercarbia did not affect f(G). This response is in contrast to increases in pulmonary ventilation that may offset any increase in arterial partial pressure of CO2 owing to CO2 loading through the animals' branchial surface. Thus, despite their reduced contribution to total gas exchange, cutaneous and branchial gas exchange in L. paradoxa can be significantly affected by temperature and aerial hypercarbia. |
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Acute effects of temperature and hypercarbia on cutaneous and branchial gas exchange in the South American lungfish, Lepidosiren paradoxaLungfishO-2 uptakeCO2 eliminationDipnoiThe South American lungfish, Lepidosiren paradoxa inhabits seasonal environments in the Central Amazon and Parana-Paraguay basins that undergo significant oscillations in temperature throughout the year. They rely on different gas exchange organs, such as gills and skin for aquatic gas exchange while their truly bilateral lungs are responsible for aerial gas exchange; however, there are no data available on the individual contributions of the skin and the gills to total aquatic gas exchange in L. paradoxa. Thus, in the present study we quantify the relative contributions of skin and gills on total aquatic gas exchange during warm (35 degrees C) and cold exposure (20 degrees C) in addition to the effects of aerial and aquatic hypercarbia on aquatic gas exchange and gill ventilation rate (f(G); 25 degrees C), respectively. Elevated temperature (35 degrees C) caused a significant increase in the contribution of cutaneous (from 0.61 +/- 0.13 to 1.34 +/- 0.26 ml. STPD.h(-1) kg(-1)) and branchial (from 0.54 +/- 0.17 to 1.73 +/- 0.53 ml. STPD.h(-1) kg(-1)) gas exchange for (V) over dotCO(2) relative to the lower temperature (20 degrees C), while (V) over dot O-2 remained relatively unchanged. L. paradoxa exhibited a greater branchial contribution in relation to total aquatic gas exchange at lower temperatures (20 and 25 degrees C) for oxygen uptake. Aerial hypercarbia decreased branchial (V) over dot O-2 whereas branchial (V) over dotCO(2) was significantly increased. Progressive increases in aquatic hypercarbia did not affect f(G). This response is in contrast to increases in pulmonary ventilation that may offset any increase in arterial partial pressure of CO2 owing to CO2 loading through the animals' branchial surface. Thus, despite their reduced contribution to total gas exchange, cutaneous and branchial gas exchange in L. paradoxa can be significantly affected by temperature and aerial hypercarbia.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Sao Paulo State Univ, Dept Anim Morphol & Physiol, Coll Agr & Vet Sci, BR-14884900 Jaboticabal, SP, BrazilNatl Inst Sci & Technol Comparat Physiol, INCT Fisiol Comparada, Rio Claro, SP, BrazilUniv Sao Paulo, Dept Physiol, Fac Med Ribeirao Preto, Ribeirao Preto, SP, BrazilFac Hlth Sci Barretos Dr Paulo Prata FACISB, Barretos, SP, BrazilSao Paulo State Univ, Dept Anim Morphol & Physiol, Coll Agr & Vet Sci, BR-14884900 Jaboticabal, SP, BrazilFAPESP: 2005/60428-8FAPESP: 2013/17606-9FAPESP: 2014/12190-1Elsevier B.V.Universidade Estadual Paulista (Unesp)Natl Inst Sci & Technol Comparat PhysiolUniversidade de São Paulo (USP)Fac Hlth Sci Barretos Dr Paulo Prata FACISBZena, Lucas A. [UNESP]Bicego, Kenia C. [UNESP]Silva, Glauber S. F. da [UNESP]Giusti, HumbertoGlass, Mogens L.Sanchez, Adriana P.2018-11-26T17:16:30Z2018-11-26T17:16:30Z2017-01-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article112-118application/pdfhttp://dx.doi.org/10.1016/j.jtherbio.2016.12.001Journal Of Thermal Biology. Oxford: Pergamon-elsevier Science Ltd, v. 63, p. 112-118, 2017.0306-4565http://hdl.handle.net/11449/16239010.1016/j.jtherbio.2016.12.001WOS:000392686200014WOS000392686200014.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal Of Thermal Biology0,782info:eu-repo/semantics/openAccess2024-06-06T18:42:46Zoai:repositorio.unesp.br:11449/162390Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-06T00:07:28.368196Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Acute effects of temperature and hypercarbia on cutaneous and branchial gas exchange in the South American lungfish, Lepidosiren paradoxa |
title |
Acute effects of temperature and hypercarbia on cutaneous and branchial gas exchange in the South American lungfish, Lepidosiren paradoxa |
spellingShingle |
Acute effects of temperature and hypercarbia on cutaneous and branchial gas exchange in the South American lungfish, Lepidosiren paradoxa Zena, Lucas A. [UNESP] Lungfish O-2 uptake CO2 elimination Dipnoi |
title_short |
Acute effects of temperature and hypercarbia on cutaneous and branchial gas exchange in the South American lungfish, Lepidosiren paradoxa |
title_full |
Acute effects of temperature and hypercarbia on cutaneous and branchial gas exchange in the South American lungfish, Lepidosiren paradoxa |
title_fullStr |
Acute effects of temperature and hypercarbia on cutaneous and branchial gas exchange in the South American lungfish, Lepidosiren paradoxa |
title_full_unstemmed |
Acute effects of temperature and hypercarbia on cutaneous and branchial gas exchange in the South American lungfish, Lepidosiren paradoxa |
title_sort |
Acute effects of temperature and hypercarbia on cutaneous and branchial gas exchange in the South American lungfish, Lepidosiren paradoxa |
author |
Zena, Lucas A. [UNESP] |
author_facet |
Zena, Lucas A. [UNESP] Bicego, Kenia C. [UNESP] Silva, Glauber S. F. da [UNESP] Giusti, Humberto Glass, Mogens L. Sanchez, Adriana P. |
author_role |
author |
author2 |
Bicego, Kenia C. [UNESP] Silva, Glauber S. F. da [UNESP] Giusti, Humberto Glass, Mogens L. Sanchez, Adriana P. |
author2_role |
author author author author author |
dc.contributor.none.fl_str_mv |
Universidade Estadual Paulista (Unesp) Natl Inst Sci & Technol Comparat Physiol Universidade de São Paulo (USP) Fac Hlth Sci Barretos Dr Paulo Prata FACISB |
dc.contributor.author.fl_str_mv |
Zena, Lucas A. [UNESP] Bicego, Kenia C. [UNESP] Silva, Glauber S. F. da [UNESP] Giusti, Humberto Glass, Mogens L. Sanchez, Adriana P. |
dc.subject.por.fl_str_mv |
Lungfish O-2 uptake CO2 elimination Dipnoi |
topic |
Lungfish O-2 uptake CO2 elimination Dipnoi |
description |
The South American lungfish, Lepidosiren paradoxa inhabits seasonal environments in the Central Amazon and Parana-Paraguay basins that undergo significant oscillations in temperature throughout the year. They rely on different gas exchange organs, such as gills and skin for aquatic gas exchange while their truly bilateral lungs are responsible for aerial gas exchange; however, there are no data available on the individual contributions of the skin and the gills to total aquatic gas exchange in L. paradoxa. Thus, in the present study we quantify the relative contributions of skin and gills on total aquatic gas exchange during warm (35 degrees C) and cold exposure (20 degrees C) in addition to the effects of aerial and aquatic hypercarbia on aquatic gas exchange and gill ventilation rate (f(G); 25 degrees C), respectively. Elevated temperature (35 degrees C) caused a significant increase in the contribution of cutaneous (from 0.61 +/- 0.13 to 1.34 +/- 0.26 ml. STPD.h(-1) kg(-1)) and branchial (from 0.54 +/- 0.17 to 1.73 +/- 0.53 ml. STPD.h(-1) kg(-1)) gas exchange for (V) over dotCO(2) relative to the lower temperature (20 degrees C), while (V) over dot O-2 remained relatively unchanged. L. paradoxa exhibited a greater branchial contribution in relation to total aquatic gas exchange at lower temperatures (20 and 25 degrees C) for oxygen uptake. Aerial hypercarbia decreased branchial (V) over dot O-2 whereas branchial (V) over dotCO(2) was significantly increased. Progressive increases in aquatic hypercarbia did not affect f(G). This response is in contrast to increases in pulmonary ventilation that may offset any increase in arterial partial pressure of CO2 owing to CO2 loading through the animals' branchial surface. Thus, despite their reduced contribution to total gas exchange, cutaneous and branchial gas exchange in L. paradoxa can be significantly affected by temperature and aerial hypercarbia. |
publishDate |
2017 |
dc.date.none.fl_str_mv |
2017-01-01 2018-11-26T17:16:30Z 2018-11-26T17:16:30Z |
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.jtherbio.2016.12.001 Journal Of Thermal Biology. Oxford: Pergamon-elsevier Science Ltd, v. 63, p. 112-118, 2017. 0306-4565 http://hdl.handle.net/11449/162390 10.1016/j.jtherbio.2016.12.001 WOS:000392686200014 WOS000392686200014.pdf |
url |
http://dx.doi.org/10.1016/j.jtherbio.2016.12.001 http://hdl.handle.net/11449/162390 |
identifier_str_mv |
Journal Of Thermal Biology. Oxford: Pergamon-elsevier Science Ltd, v. 63, p. 112-118, 2017. 0306-4565 10.1016/j.jtherbio.2016.12.001 WOS:000392686200014 WOS000392686200014.pdf |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Journal Of Thermal Biology 0,782 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
112-118 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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1808129586727223296 |