Branchial O2 chemoreceptors in Nile tilapia Oreochromis niloticus: Control of cardiorespiratory function in response to hypoxia
Autor(a) principal: | |
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Data de Publicação: | 2013 |
Outros Autores: | , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Institucional da UNESP |
Texto Completo: | http://dx.doi.org/10.1016/j.cbpa.2013.04.024 http://hdl.handle.net/11449/76395 |
Resumo: | This study examined the distribution and orientation of gill O2 chemoreceptors in Oreochromis niloticus and their role in cardiorespiratory responses to graded hypoxia. Intact fish, and a group with the first gill arch excised (operated), were submitted to graded hypoxia and their cardiorespiratory responses (oxygen uptake - V̇O2, breathing frequency - fR, ventilatory stroke volume - VT, gill ventilation - V̇G, O2 extraction from the ventilatory current - EO2, and heart rate - fH) were compared. Their responses to bolus injections of NaCN into the bloodstream (internal) or ventilatory water stream (external) were also determined. The V̇O2 of operated fish was significantly lower at the deepest levels of hypoxia. Neither reflex bradycardia nor ventilatory responses were completely abolished by bilateral excision of the first gill arch. EO2 of the operated group was consistently lower than the intact group. The responses to internal and external NaCN included transient decreases in fH and increases in fR and Vamp (ventilation amplitude). These cardiorespiratory responses were attenuated but not abolished in the operated group, indicating that chemoreceptors are not restricted to the first gill arch, and are sensitive to oxygen levels in both blood and water. © 2013 Elsevier Inc. |
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Branchial O2 chemoreceptors in Nile tilapia Oreochromis niloticus: Control of cardiorespiratory function in response to hypoxiaGill chemoreceptorsHypoxiaHypoxic bradycardiaOreochromis niloticusVentilationoxygenbreathing ratecardiopulmonary functionchemoreceptorcontrolled studyheart stroke volumehypoxianonhumanoxygen consumptionThis study examined the distribution and orientation of gill O2 chemoreceptors in Oreochromis niloticus and their role in cardiorespiratory responses to graded hypoxia. Intact fish, and a group with the first gill arch excised (operated), were submitted to graded hypoxia and their cardiorespiratory responses (oxygen uptake - V̇O2, breathing frequency - fR, ventilatory stroke volume - VT, gill ventilation - V̇G, O2 extraction from the ventilatory current - EO2, and heart rate - fH) were compared. Their responses to bolus injections of NaCN into the bloodstream (internal) or ventilatory water stream (external) were also determined. The V̇O2 of operated fish was significantly lower at the deepest levels of hypoxia. Neither reflex bradycardia nor ventilatory responses were completely abolished by bilateral excision of the first gill arch. EO2 of the operated group was consistently lower than the intact group. The responses to internal and external NaCN included transient decreases in fH and increases in fR and Vamp (ventilation amplitude). These cardiorespiratory responses were attenuated but not abolished in the operated group, indicating that chemoreceptors are not restricted to the first gill arch, and are sensitive to oxygen levels in both blood and water. © 2013 Elsevier Inc.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Department of Physiological Sciences Laboratory of Zoophysiology and Comparative Biochemistry Federal University of São Carlos (UFSCar), P.O. Box 676, Via Washington Luis, km 235, 13565-905 São Carlos, SPDepartment of Zoology and Botany São Paulo State University - UNESP/IBILCE, Rua Cristóvão Colombo, 2265, 15054-000 - São José do Rio Preto, SPNational Institute of Science and Technology - Comparative Physiology (FAPESP/CNPq)Department of Zoology and Botany São Paulo State University - UNESP/IBILCE, Rua Cristóvão Colombo, 2265, 15054-000 - São José do Rio Preto, SPFAPESP: 10/03599-2Universidade Federal de São Carlos (UFSCar)Universidade Estadual Paulista (Unesp)Zeraik, Vivian M.Belão, Thiago C.Florindo, Luiz Henrique [UNESP]Kalinin, Ana L.Rantin, F. Tadeu2014-05-27T11:30:32Z2014-05-27T11:30:32Z2013-09-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article17-25application/pdfhttp://dx.doi.org/10.1016/j.cbpa.2013.04.024Comparative Biochemistry and Physiology - A Molecular and Integrative Physiology, v. 166, n. 1, p. 17-25, 2013.1095-64331531-4332http://hdl.handle.net/11449/7639510.1016/j.cbpa.2013.04.024WOS:0003226932000032-s2.0-848789449992-s2.0-84878944999.pdf2797832406818407Scopusreponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengComparative Biochemistry and Physiology - A Molecular and Integrative Physiology2.2580,8360,836info:eu-repo/semantics/openAccess2023-11-28T06:16:10Zoai:repositorio.unesp.br:11449/76395Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462023-11-28T06:16:10Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false |
dc.title.none.fl_str_mv |
Branchial O2 chemoreceptors in Nile tilapia Oreochromis niloticus: Control of cardiorespiratory function in response to hypoxia |
title |
Branchial O2 chemoreceptors in Nile tilapia Oreochromis niloticus: Control of cardiorespiratory function in response to hypoxia |
spellingShingle |
Branchial O2 chemoreceptors in Nile tilapia Oreochromis niloticus: Control of cardiorespiratory function in response to hypoxia Zeraik, Vivian M. Gill chemoreceptors Hypoxia Hypoxic bradycardia Oreochromis niloticus Ventilation oxygen breathing rate cardiopulmonary function chemoreceptor controlled study heart stroke volume hypoxia nonhuman oxygen consumption |
title_short |
Branchial O2 chemoreceptors in Nile tilapia Oreochromis niloticus: Control of cardiorespiratory function in response to hypoxia |
title_full |
Branchial O2 chemoreceptors in Nile tilapia Oreochromis niloticus: Control of cardiorespiratory function in response to hypoxia |
title_fullStr |
Branchial O2 chemoreceptors in Nile tilapia Oreochromis niloticus: Control of cardiorespiratory function in response to hypoxia |
title_full_unstemmed |
Branchial O2 chemoreceptors in Nile tilapia Oreochromis niloticus: Control of cardiorespiratory function in response to hypoxia |
title_sort |
Branchial O2 chemoreceptors in Nile tilapia Oreochromis niloticus: Control of cardiorespiratory function in response to hypoxia |
author |
Zeraik, Vivian M. |
author_facet |
Zeraik, Vivian M. Belão, Thiago C. Florindo, Luiz Henrique [UNESP] Kalinin, Ana L. Rantin, F. Tadeu |
author_role |
author |
author2 |
Belão, Thiago C. Florindo, Luiz Henrique [UNESP] Kalinin, Ana L. Rantin, F. Tadeu |
author2_role |
author author author author |
dc.contributor.none.fl_str_mv |
Universidade Federal de São Carlos (UFSCar) Universidade Estadual Paulista (Unesp) |
dc.contributor.author.fl_str_mv |
Zeraik, Vivian M. Belão, Thiago C. Florindo, Luiz Henrique [UNESP] Kalinin, Ana L. Rantin, F. Tadeu |
dc.subject.por.fl_str_mv |
Gill chemoreceptors Hypoxia Hypoxic bradycardia Oreochromis niloticus Ventilation oxygen breathing rate cardiopulmonary function chemoreceptor controlled study heart stroke volume hypoxia nonhuman oxygen consumption |
topic |
Gill chemoreceptors Hypoxia Hypoxic bradycardia Oreochromis niloticus Ventilation oxygen breathing rate cardiopulmonary function chemoreceptor controlled study heart stroke volume hypoxia nonhuman oxygen consumption |
description |
This study examined the distribution and orientation of gill O2 chemoreceptors in Oreochromis niloticus and their role in cardiorespiratory responses to graded hypoxia. Intact fish, and a group with the first gill arch excised (operated), were submitted to graded hypoxia and their cardiorespiratory responses (oxygen uptake - V̇O2, breathing frequency - fR, ventilatory stroke volume - VT, gill ventilation - V̇G, O2 extraction from the ventilatory current - EO2, and heart rate - fH) were compared. Their responses to bolus injections of NaCN into the bloodstream (internal) or ventilatory water stream (external) were also determined. The V̇O2 of operated fish was significantly lower at the deepest levels of hypoxia. Neither reflex bradycardia nor ventilatory responses were completely abolished by bilateral excision of the first gill arch. EO2 of the operated group was consistently lower than the intact group. The responses to internal and external NaCN included transient decreases in fH and increases in fR and Vamp (ventilation amplitude). These cardiorespiratory responses were attenuated but not abolished in the operated group, indicating that chemoreceptors are not restricted to the first gill arch, and are sensitive to oxygen levels in both blood and water. © 2013 Elsevier Inc. |
publishDate |
2013 |
dc.date.none.fl_str_mv |
2013-09-01 2014-05-27T11:30:32Z 2014-05-27T11:30:32Z |
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.2013.04.024 Comparative Biochemistry and Physiology - A Molecular and Integrative Physiology, v. 166, n. 1, p. 17-25, 2013. 1095-6433 1531-4332 http://hdl.handle.net/11449/76395 10.1016/j.cbpa.2013.04.024 WOS:000322693200003 2-s2.0-84878944999 2-s2.0-84878944999.pdf 2797832406818407 |
url |
http://dx.doi.org/10.1016/j.cbpa.2013.04.024 http://hdl.handle.net/11449/76395 |
identifier_str_mv |
Comparative Biochemistry and Physiology - A Molecular and Integrative Physiology, v. 166, n. 1, p. 17-25, 2013. 1095-6433 1531-4332 10.1016/j.cbpa.2013.04.024 WOS:000322693200003 2-s2.0-84878944999 2-s2.0-84878944999.pdf 2797832406818407 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
Comparative Biochemistry and Physiology - A Molecular and Integrative Physiology 2.258 0,836 0,836 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
17-25 application/pdf |
dc.source.none.fl_str_mv |
Scopus 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 |
|
_version_ |
1799965100641091584 |