Not Good, but Not All Bad: Dehydration Effects on Body Fluids, Organ Masses, and Water Flux through the Skin of Rhinella schneideri (Amphibia, Bufonidae)

Detalhes bibliográficos
Autor(a) principal: Anderson, Rodolfo C. O. [UNESP]
Data de Publicação: 2017
Outros Autores: Bovo, Rafael P. [UNESP], Eismann, Carlos E. [UNESP], Menegario, Amauri A. [UNESP], Andrade, Denis V. [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1086/690189
http://hdl.handle.net/11449/162674
Resumo: Because of their permeable skin, terrestrial amphibians are constantly challenged by the potential risk of dehydration. However, some of the physiological consequences associated with dehydration may affect aspects that are themselves relevant to the regulation of water balance. Accordingly, we examined the effects of graded levels of dehydration on the rates of evaporative water loss and water absorption through the skin in the terrestrial Neotropical toad, Rhinella schneideri. Concomitantly, we monitored the effects of dehydration on the mass of visceral organs; hematocrit and hemoglobin content; plasma osmolality; and plasma concentration of urea, sodium, chloride, and potassium. We found that dehydration caused an increase in the concentration of body fluids, as indicated by virtually all the parameters examined. There was a proportional change in the relative masses of visceral organs, except for the liver and kidneys, which exhibited a decrease in their relative masses greater than the whole-body level of dehydration. Changesor the preservationof relative organ masses during dehydration may be explained by organ-specific physiological adjustments in response to the functional stress introduced by the dehydration itself. As dehydration progressed, evaporative water loss diminished and water reabsorption increased. In both cases, the increase in body fluid concentration associated with the dehydration provided the osmotic driver for these changes in water flux. Additionally, dehydration-induced alterations on the cutaneous barrier may also have contributed to the decrease in water flux. Dehydration, therefore, while posing a considerable challenge on the water balance regulation of anurans, paradoxically facilitates water conservation and absorption.
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spelling Not Good, but Not All Bad: Dehydration Effects on Body Fluids, Organ Masses, and Water Flux through the Skin of Rhinella schneideri (Amphibia, Bufonidae)amphibiansAnuraevaporative water lossrehydrationwater balanceBecause of their permeable skin, terrestrial amphibians are constantly challenged by the potential risk of dehydration. However, some of the physiological consequences associated with dehydration may affect aspects that are themselves relevant to the regulation of water balance. Accordingly, we examined the effects of graded levels of dehydration on the rates of evaporative water loss and water absorption through the skin in the terrestrial Neotropical toad, Rhinella schneideri. Concomitantly, we monitored the effects of dehydration on the mass of visceral organs; hematocrit and hemoglobin content; plasma osmolality; and plasma concentration of urea, sodium, chloride, and potassium. We found that dehydration caused an increase in the concentration of body fluids, as indicated by virtually all the parameters examined. There was a proportional change in the relative masses of visceral organs, except for the liver and kidneys, which exhibited a decrease in their relative masses greater than the whole-body level of dehydration. Changesor the preservationof relative organ masses during dehydration may be explained by organ-specific physiological adjustments in response to the functional stress introduced by the dehydration itself. As dehydration progressed, evaporative water loss diminished and water reabsorption increased. In both cases, the increase in body fluid concentration associated with the dehydration provided the osmotic driver for these changes in water flux. Additionally, dehydration-induced alterations on the cutaneous barrier may also have contributed to the decrease in water flux. Dehydration, therefore, while posing a considerable challenge on the water balance regulation of anurans, paradoxically facilitates water conservation and absorption.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Univ Estadual Paulista, Inst Biociencias, Dept Zool, Sao Paulo, BrazilUniv Estadual Paulista, Ctr Estudos Ambientais, Sao Paulo, BrazilUniv Estadual Paulista, Inst Biociencias, Dept Zool, Sao Paulo, BrazilUniv Estadual Paulista, Ctr Estudos Ambientais, Sao Paulo, BrazilFAPESP: 10/20061-6FAPESP: 13/04190-9CNPq: 302045/2012-0CNPq: 306811/2015-4CNPq: 13/14-25780Univ Chicago PressUniversidade Estadual Paulista (Unesp)Anderson, Rodolfo C. O. [UNESP]Bovo, Rafael P. [UNESP]Eismann, Carlos E. [UNESP]Menegario, Amauri A. [UNESP]Andrade, Denis V. [UNESP]2018-11-26T17:24:24Z2018-11-26T17:24:24Z2017-05-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article313-320application/pdfhttp://dx.doi.org/10.1086/690189Physiological And Biochemical Zoology. Chicago: Univ Chicago Press, v. 90, n. 3, p. 313-320, 2017.1522-2152http://hdl.handle.net/11449/16267410.1086/690189WOS:000398802900002WOS000398802900002.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengPhysiological And Biochemical Zoology0,904info:eu-repo/semantics/openAccess2024-04-10T19:22:25Zoai:repositorio.unesp.br:11449/162674Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T16:26:10.827617Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Not Good, but Not All Bad: Dehydration Effects on Body Fluids, Organ Masses, and Water Flux through the Skin of Rhinella schneideri (Amphibia, Bufonidae)
title Not Good, but Not All Bad: Dehydration Effects on Body Fluids, Organ Masses, and Water Flux through the Skin of Rhinella schneideri (Amphibia, Bufonidae)
spellingShingle Not Good, but Not All Bad: Dehydration Effects on Body Fluids, Organ Masses, and Water Flux through the Skin of Rhinella schneideri (Amphibia, Bufonidae)
Anderson, Rodolfo C. O. [UNESP]
amphibians
Anura
evaporative water loss
rehydration
water balance
title_short Not Good, but Not All Bad: Dehydration Effects on Body Fluids, Organ Masses, and Water Flux through the Skin of Rhinella schneideri (Amphibia, Bufonidae)
title_full Not Good, but Not All Bad: Dehydration Effects on Body Fluids, Organ Masses, and Water Flux through the Skin of Rhinella schneideri (Amphibia, Bufonidae)
title_fullStr Not Good, but Not All Bad: Dehydration Effects on Body Fluids, Organ Masses, and Water Flux through the Skin of Rhinella schneideri (Amphibia, Bufonidae)
title_full_unstemmed Not Good, but Not All Bad: Dehydration Effects on Body Fluids, Organ Masses, and Water Flux through the Skin of Rhinella schneideri (Amphibia, Bufonidae)
title_sort Not Good, but Not All Bad: Dehydration Effects on Body Fluids, Organ Masses, and Water Flux through the Skin of Rhinella schneideri (Amphibia, Bufonidae)
author Anderson, Rodolfo C. O. [UNESP]
author_facet Anderson, Rodolfo C. O. [UNESP]
Bovo, Rafael P. [UNESP]
Eismann, Carlos E. [UNESP]
Menegario, Amauri A. [UNESP]
Andrade, Denis V. [UNESP]
author_role author
author2 Bovo, Rafael P. [UNESP]
Eismann, Carlos E. [UNESP]
Menegario, Amauri A. [UNESP]
Andrade, Denis V. [UNESP]
author2_role author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Anderson, Rodolfo C. O. [UNESP]
Bovo, Rafael P. [UNESP]
Eismann, Carlos E. [UNESP]
Menegario, Amauri A. [UNESP]
Andrade, Denis V. [UNESP]
dc.subject.por.fl_str_mv amphibians
Anura
evaporative water loss
rehydration
water balance
topic amphibians
Anura
evaporative water loss
rehydration
water balance
description Because of their permeable skin, terrestrial amphibians are constantly challenged by the potential risk of dehydration. However, some of the physiological consequences associated with dehydration may affect aspects that are themselves relevant to the regulation of water balance. Accordingly, we examined the effects of graded levels of dehydration on the rates of evaporative water loss and water absorption through the skin in the terrestrial Neotropical toad, Rhinella schneideri. Concomitantly, we monitored the effects of dehydration on the mass of visceral organs; hematocrit and hemoglobin content; plasma osmolality; and plasma concentration of urea, sodium, chloride, and potassium. We found that dehydration caused an increase in the concentration of body fluids, as indicated by virtually all the parameters examined. There was a proportional change in the relative masses of visceral organs, except for the liver and kidneys, which exhibited a decrease in their relative masses greater than the whole-body level of dehydration. Changesor the preservationof relative organ masses during dehydration may be explained by organ-specific physiological adjustments in response to the functional stress introduced by the dehydration itself. As dehydration progressed, evaporative water loss diminished and water reabsorption increased. In both cases, the increase in body fluid concentration associated with the dehydration provided the osmotic driver for these changes in water flux. Additionally, dehydration-induced alterations on the cutaneous barrier may also have contributed to the decrease in water flux. Dehydration, therefore, while posing a considerable challenge on the water balance regulation of anurans, paradoxically facilitates water conservation and absorption.
publishDate 2017
dc.date.none.fl_str_mv 2017-05-01
2018-11-26T17:24:24Z
2018-11-26T17:24:24Z
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/10.1086/690189
Physiological And Biochemical Zoology. Chicago: Univ Chicago Press, v. 90, n. 3, p. 313-320, 2017.
1522-2152
http://hdl.handle.net/11449/162674
10.1086/690189
WOS:000398802900002
WOS000398802900002.pdf
url http://dx.doi.org/10.1086/690189
http://hdl.handle.net/11449/162674
identifier_str_mv Physiological And Biochemical Zoology. Chicago: Univ Chicago Press, v. 90, n. 3, p. 313-320, 2017.
1522-2152
10.1086/690189
WOS:000398802900002
WOS000398802900002.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Physiological And Biochemical Zoology
0,904
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 313-320
application/pdf
dc.publisher.none.fl_str_mv Univ Chicago Press
publisher.none.fl_str_mv Univ Chicago Press
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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