The consequences of seasonal fasting during the dormancy of tegu lizards (Salvator merianae) on their postprandial metabolic response

Detalhes bibliográficos
Autor(a) principal: Gavira, Rodrigo S. B. [UNESP]
Data de Publicação: 2018
Outros Autores: Sartori, Marina R. [UNESP], Gontero-Fourcade, Manuel N., Gomes, Bruna F. [UNESP], Abe, Augusto S. [UNESP], Andrade, Denis V. [UNESP]
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1242/jeb.176156
http://hdl.handle.net/11449/164437
Resumo: Tegu lizards (Salvator merianae) aestivate for up to 5 months during Brazil's winter, when they retreat to burrows and halt most activities. Dormant tegus reduce their gastrointestinal (GI) mass, which allows a substantial energy economy. This strategy, however, implies that the first post-dormancy digestion would be more costly than subsequent feeding episodes as a result of GI atrophy. To address this, we determined the postprandial metabolic response (SDA) of the first (M1), second (M2) and several (RM) feeding episodes after tegus' dormancy. Another group of tegus (PF) was subjected to an extra 50 day fasting period after arousal. Glucose, triglycerides and uric acid levels were checked before and after feeding. M1 digestion lasted twice as long and cost twofold more when compared with M2 or RM, in agreement with the idea that GI atrophy inflates digestion cost at the first post-dormancy meal. The SDA response was similar in M2 and RM, suggesting that the GI tract was fully reorganized after the first feeding. The SDA cost was equal in PF and RM, implying that the change in state per se (dormant to arousal) triggers the regrowth of GI, independently of feeding. Fasting tegus at M1 presented higher triglyceride and lower uric acid levels than fed tegus, indicating that fasting is mainly sustained by fat storage. Our results show that seasonal fasting imposes an extra digestion cost to tegus following their next feeding, which is fully paid during their first digestion. This surplus cost, however, is negligible compared with the overall energetic savings from GI tract atrophy during the dormancy period.
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spelling The consequences of seasonal fasting during the dormancy of tegu lizards (Salvator merianae) on their postprandial metabolic responseMetabolismDormancy effectsGastrointestinal tractAtrophySpecific dynamic actionBlood metabolitesTegu lizards (Salvator merianae) aestivate for up to 5 months during Brazil's winter, when they retreat to burrows and halt most activities. Dormant tegus reduce their gastrointestinal (GI) mass, which allows a substantial energy economy. This strategy, however, implies that the first post-dormancy digestion would be more costly than subsequent feeding episodes as a result of GI atrophy. To address this, we determined the postprandial metabolic response (SDA) of the first (M1), second (M2) and several (RM) feeding episodes after tegus' dormancy. Another group of tegus (PF) was subjected to an extra 50 day fasting period after arousal. Glucose, triglycerides and uric acid levels were checked before and after feeding. M1 digestion lasted twice as long and cost twofold more when compared with M2 or RM, in agreement with the idea that GI atrophy inflates digestion cost at the first post-dormancy meal. The SDA response was similar in M2 and RM, suggesting that the GI tract was fully reorganized after the first feeding. The SDA cost was equal in PF and RM, implying that the change in state per se (dormant to arousal) triggers the regrowth of GI, independently of feeding. Fasting tegus at M1 presented higher triglyceride and lower uric acid levels than fed tegus, indicating that fasting is mainly sustained by fat storage. Our results show that seasonal fasting imposes an extra digestion cost to tegus following their next feeding, which is fully paid during their first digestion. This surplus cost, however, is negligible compared with the overall energetic savings from GI tract atrophy during the dormancy period.Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)National Council Scientific Technical Research (Consejo Nacional de Investigaciones Cientificas y Tecnicas, CONICET)Univ Estadual Paulista, Inst Biociencias, Dept Zool, BR-13506900 Rio Claro, SP, BrazilConsejo Invest Cient & Tecn, Inst Multidisciplinario Invest Biol San Luis, RA-5700 San Luis, ArgentinaUniv Estadual Paulista, Inst Biociencias, Dept Ecol, BR-13506900 Rio Claro, SP, BrazilUniv Estadual Paulista, Inst Biociencias, Dept Zool, BR-13506900 Rio Claro, SP, BrazilUniv Estadual Paulista, Inst Biociencias, Dept Ecol, BR-13506900 Rio Claro, SP, BrazilFAPESP: 12/15697-4FAPESP: 12/16537-0FAPESP: 13/04190-9FAPESP: 11/09647-1CNPq: 306811/2015-4CNPq: 08/57712-4Company Biologists LtdUniversidade Estadual Paulista (Unesp)Consejo Invest Cient & TecnGavira, Rodrigo S. B. [UNESP]Sartori, Marina R. [UNESP]Gontero-Fourcade, Manuel N.Gomes, Bruna F. [UNESP]Abe, Augusto S. [UNESP]Andrade, Denis V. [UNESP]2018-11-26T17:54:33Z2018-11-26T17:54:33Z2018-04-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article8application/pdfhttp://dx.doi.org/10.1242/jeb.176156Journal Of Experimental Biology. Cambridge: Company Biologists Ltd, v. 221, n. 8, 8 p., 2018.0022-0949http://hdl.handle.net/11449/16443710.1242/jeb.176156WOS:000438909900016WOS000438909900016.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal Of Experimental Biology1,611info:eu-repo/semantics/openAccess2024-01-06T06:25:36Zoai:repositorio.unesp.br:11449/164437Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-01-06T06:25:36Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv The consequences of seasonal fasting during the dormancy of tegu lizards (Salvator merianae) on their postprandial metabolic response
title The consequences of seasonal fasting during the dormancy of tegu lizards (Salvator merianae) on their postprandial metabolic response
spellingShingle The consequences of seasonal fasting during the dormancy of tegu lizards (Salvator merianae) on their postprandial metabolic response
Gavira, Rodrigo S. B. [UNESP]
Metabolism
Dormancy effects
Gastrointestinal tract
Atrophy
Specific dynamic action
Blood metabolites
title_short The consequences of seasonal fasting during the dormancy of tegu lizards (Salvator merianae) on their postprandial metabolic response
title_full The consequences of seasonal fasting during the dormancy of tegu lizards (Salvator merianae) on their postprandial metabolic response
title_fullStr The consequences of seasonal fasting during the dormancy of tegu lizards (Salvator merianae) on their postprandial metabolic response
title_full_unstemmed The consequences of seasonal fasting during the dormancy of tegu lizards (Salvator merianae) on their postprandial metabolic response
title_sort The consequences of seasonal fasting during the dormancy of tegu lizards (Salvator merianae) on their postprandial metabolic response
author Gavira, Rodrigo S. B. [UNESP]
author_facet Gavira, Rodrigo S. B. [UNESP]
Sartori, Marina R. [UNESP]
Gontero-Fourcade, Manuel N.
Gomes, Bruna F. [UNESP]
Abe, Augusto S. [UNESP]
Andrade, Denis V. [UNESP]
author_role author
author2 Sartori, Marina R. [UNESP]
Gontero-Fourcade, Manuel N.
Gomes, Bruna F. [UNESP]
Abe, Augusto S. [UNESP]
Andrade, Denis V. [UNESP]
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Universidade Estadual Paulista (Unesp)
Consejo Invest Cient & Tecn
dc.contributor.author.fl_str_mv Gavira, Rodrigo S. B. [UNESP]
Sartori, Marina R. [UNESP]
Gontero-Fourcade, Manuel N.
Gomes, Bruna F. [UNESP]
Abe, Augusto S. [UNESP]
Andrade, Denis V. [UNESP]
dc.subject.por.fl_str_mv Metabolism
Dormancy effects
Gastrointestinal tract
Atrophy
Specific dynamic action
Blood metabolites
topic Metabolism
Dormancy effects
Gastrointestinal tract
Atrophy
Specific dynamic action
Blood metabolites
description Tegu lizards (Salvator merianae) aestivate for up to 5 months during Brazil's winter, when they retreat to burrows and halt most activities. Dormant tegus reduce their gastrointestinal (GI) mass, which allows a substantial energy economy. This strategy, however, implies that the first post-dormancy digestion would be more costly than subsequent feeding episodes as a result of GI atrophy. To address this, we determined the postprandial metabolic response (SDA) of the first (M1), second (M2) and several (RM) feeding episodes after tegus' dormancy. Another group of tegus (PF) was subjected to an extra 50 day fasting period after arousal. Glucose, triglycerides and uric acid levels were checked before and after feeding. M1 digestion lasted twice as long and cost twofold more when compared with M2 or RM, in agreement with the idea that GI atrophy inflates digestion cost at the first post-dormancy meal. The SDA response was similar in M2 and RM, suggesting that the GI tract was fully reorganized after the first feeding. The SDA cost was equal in PF and RM, implying that the change in state per se (dormant to arousal) triggers the regrowth of GI, independently of feeding. Fasting tegus at M1 presented higher triglyceride and lower uric acid levels than fed tegus, indicating that fasting is mainly sustained by fat storage. Our results show that seasonal fasting imposes an extra digestion cost to tegus following their next feeding, which is fully paid during their first digestion. This surplus cost, however, is negligible compared with the overall energetic savings from GI tract atrophy during the dormancy period.
publishDate 2018
dc.date.none.fl_str_mv 2018-11-26T17:54:33Z
2018-11-26T17:54:33Z
2018-04-01
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/10.1242/jeb.176156
Journal Of Experimental Biology. Cambridge: Company Biologists Ltd, v. 221, n. 8, 8 p., 2018.
0022-0949
http://hdl.handle.net/11449/164437
10.1242/jeb.176156
WOS:000438909900016
WOS000438909900016.pdf
url http://dx.doi.org/10.1242/jeb.176156
http://hdl.handle.net/11449/164437
identifier_str_mv Journal Of Experimental Biology. Cambridge: Company Biologists Ltd, v. 221, n. 8, 8 p., 2018.
0022-0949
10.1242/jeb.176156
WOS:000438909900016
WOS000438909900016.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Journal Of Experimental Biology
1,611
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 8
application/pdf
dc.publisher.none.fl_str_mv Company Biologists Ltd
publisher.none.fl_str_mv Company Biologists Ltd
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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