Effects of vagotomy and pharmacological blocking on heart rate of the toad <i>Rhinella arenarum</i> (Anura: Bufonidae) during forced submersion

Autores
Cervino, Claudio; Rodríguez, Enrique M.
Año de publicación
2017
Idioma
inglés
Tipo de recurso
artículo
Estado
versión publicada
Descripción
Toads of Rhinella (=Bufo) arenarum were subjected to a condition of forced submersion duringa 40-minute period, to deepen the understanding of the mechanisms involved in the control ofboth submersion and emersion. Animals previously submitted to a first control measurementseries, were then injected with atropine or propranolol, or were vagotomized. In animals eitherinjected with atropine or vagotomized, a higher heart rate (HR) than in the control group wasobserved, before, during and after the forced submersion. These animals were able to decreaseHR, although in a lesser extent than controls, suggesting that other mechanisms in addition tovagal activity are also producing and maintaining bradycardia during the submersion period.In those animals injected with propranolol (a β-adrenergic blocker), a HR lower than that ofcontrols were observed only at the beginning of the submersion and during the emersion phase.The low HR caused by propranolol during emersion with buccal pumping shows the importanceof the sympathetic system in increasing HR during emersion.
Asociación Herpetológica Argentina (AHA)
Materia
Ciencias Naturales
herpetología
anfibios
Nivel de accesibilidad
acceso abierto
Condiciones de uso
http://creativecommons.org/licenses/by-nc/2.5/ar/
Repositorio
SEDICI (UNLP)
Institución
Universidad Nacional de La Plata
OAI Identificador
oai:sedici.unlp.edu.ar:10915/62735

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spelling Effects of vagotomy and pharmacological blocking on heart rate of the toad <i>Rhinella arenarum</i> (Anura: Bufonidae) during forced submersionCervino, ClaudioRodríguez, Enrique M.Ciencias NaturalesherpetologíaanfibiosToads of Rhinella (=Bufo) arenarum were subjected to a condition of forced submersion duringa 40-minute period, to deepen the understanding of the mechanisms involved in the control ofboth submersion and emersion. Animals previously submitted to a first control measurementseries, were then injected with atropine or propranolol, or were vagotomized. In animals eitherinjected with atropine or vagotomized, a higher heart rate (HR) than in the control group wasobserved, before, during and after the forced submersion. These animals were able to decreaseHR, although in a lesser extent than controls, suggesting that other mechanisms in addition tovagal activity are also producing and maintaining bradycardia during the submersion period.In those animals injected with propranolol (a β-adrenergic blocker), a HR lower than that ofcontrols were observed only at the beginning of the submersion and during the emersion phase.The low HR caused by propranolol during emersion with buccal pumping shows the importanceof the sympathetic system in increasing HR during emersion.Asociación Herpetológica Argentina (AHA)2017info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionArticulohttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdf75-82http://sedici.unlp.edu.ar/handle/10915/62735enginfo:eu-repo/semantics/altIdentifier/url/http://ppct.caicyt.gov.ar/index.php/cuadherpetol/article/view/10256info:eu-repo/semantics/altIdentifier/issn/1852-5768info:eu-repo/semantics/openAccesshttp://creativecommons.org/licenses/by-nc/2.5/ar/Creative Commons Attribution-NonCommercial 2.5 Argentina (CC BY-NC 2.5)reponame:SEDICI (UNLP)instname:Universidad Nacional de La Platainstacron:UNLP2025-09-29T11:08:10Zoai:sedici.unlp.edu.ar:10915/62735Institucionalhttp://sedici.unlp.edu.ar/Universidad públicaNo correspondehttp://sedici.unlp.edu.ar/oai/snrdalira@sedici.unlp.edu.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:13292025-09-29 11:08:10.386SEDICI (UNLP) - Universidad Nacional de La Platafalse
dc.title.none.fl_str_mv Effects of vagotomy and pharmacological blocking on heart rate of the toad <i>Rhinella arenarum</i> (Anura: Bufonidae) during forced submersion
title Effects of vagotomy and pharmacological blocking on heart rate of the toad <i>Rhinella arenarum</i> (Anura: Bufonidae) during forced submersion
spellingShingle Effects of vagotomy and pharmacological blocking on heart rate of the toad <i>Rhinella arenarum</i> (Anura: Bufonidae) during forced submersion
Cervino, Claudio
Ciencias Naturales
herpetología
anfibios
title_short Effects of vagotomy and pharmacological blocking on heart rate of the toad <i>Rhinella arenarum</i> (Anura: Bufonidae) during forced submersion
title_full Effects of vagotomy and pharmacological blocking on heart rate of the toad <i>Rhinella arenarum</i> (Anura: Bufonidae) during forced submersion
title_fullStr Effects of vagotomy and pharmacological blocking on heart rate of the toad <i>Rhinella arenarum</i> (Anura: Bufonidae) during forced submersion
title_full_unstemmed Effects of vagotomy and pharmacological blocking on heart rate of the toad <i>Rhinella arenarum</i> (Anura: Bufonidae) during forced submersion
title_sort Effects of vagotomy and pharmacological blocking on heart rate of the toad <i>Rhinella arenarum</i> (Anura: Bufonidae) during forced submersion
dc.creator.none.fl_str_mv Cervino, Claudio
Rodríguez, Enrique M.
author Cervino, Claudio
author_facet Cervino, Claudio
Rodríguez, Enrique M.
author_role author
author2 Rodríguez, Enrique M.
author2_role author
dc.subject.none.fl_str_mv Ciencias Naturales
herpetología
anfibios
topic Ciencias Naturales
herpetología
anfibios
dc.description.none.fl_txt_mv Toads of Rhinella (=Bufo) arenarum were subjected to a condition of forced submersion duringa 40-minute period, to deepen the understanding of the mechanisms involved in the control ofboth submersion and emersion. Animals previously submitted to a first control measurementseries, were then injected with atropine or propranolol, or were vagotomized. In animals eitherinjected with atropine or vagotomized, a higher heart rate (HR) than in the control group wasobserved, before, during and after the forced submersion. These animals were able to decreaseHR, although in a lesser extent than controls, suggesting that other mechanisms in addition tovagal activity are also producing and maintaining bradycardia during the submersion period.In those animals injected with propranolol (a β-adrenergic blocker), a HR lower than that ofcontrols were observed only at the beginning of the submersion and during the emersion phase.The low HR caused by propranolol during emersion with buccal pumping shows the importanceof the sympathetic system in increasing HR during emersion.
Asociación Herpetológica Argentina (AHA)
description Toads of Rhinella (=Bufo) arenarum were subjected to a condition of forced submersion duringa 40-minute period, to deepen the understanding of the mechanisms involved in the control ofboth submersion and emersion. Animals previously submitted to a first control measurementseries, were then injected with atropine or propranolol, or were vagotomized. In animals eitherinjected with atropine or vagotomized, a higher heart rate (HR) than in the control group wasobserved, before, during and after the forced submersion. These animals were able to decreaseHR, although in a lesser extent than controls, suggesting that other mechanisms in addition tovagal activity are also producing and maintaining bradycardia during the submersion period.In those animals injected with propranolol (a β-adrenergic blocker), a HR lower than that ofcontrols were observed only at the beginning of the submersion and during the emersion phase.The low HR caused by propranolol during emersion with buccal pumping shows the importanceof the sympathetic system in increasing HR during emersion.
publishDate 2017
dc.date.none.fl_str_mv 2017
dc.type.none.fl_str_mv info:eu-repo/semantics/article
info:eu-repo/semantics/publishedVersion
Articulo
http://purl.org/coar/resource_type/c_6501
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format article
status_str publishedVersion
dc.identifier.none.fl_str_mv http://sedici.unlp.edu.ar/handle/10915/62735
url http://sedici.unlp.edu.ar/handle/10915/62735
dc.language.none.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv info:eu-repo/semantics/altIdentifier/url/http://ppct.caicyt.gov.ar/index.php/cuadherpetol/article/view/10256
info:eu-repo/semantics/altIdentifier/issn/1852-5768
dc.rights.none.fl_str_mv info:eu-repo/semantics/openAccess
http://creativecommons.org/licenses/by-nc/2.5/ar/
Creative Commons Attribution-NonCommercial 2.5 Argentina (CC BY-NC 2.5)
eu_rights_str_mv openAccess
rights_invalid_str_mv http://creativecommons.org/licenses/by-nc/2.5/ar/
Creative Commons Attribution-NonCommercial 2.5 Argentina (CC BY-NC 2.5)
dc.format.none.fl_str_mv application/pdf
75-82
dc.source.none.fl_str_mv reponame:SEDICI (UNLP)
instname:Universidad Nacional de La Plata
instacron:UNLP
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repository.name.fl_str_mv SEDICI (UNLP) - Universidad Nacional de La Plata
repository.mail.fl_str_mv alira@sedici.unlp.edu.ar
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