Daily and annual cycles in thermoregulatory behaviour and cardio-respiratory physiology of black and white tegu lizards

Detalhes bibliográficos
Autor(a) principal: Sanders, Colin E.
Data de Publicação: 2015
Outros Autores: Tattersall, Glenn J., Reichert, Michelle, Andrade, Denis V. [UNESP], Abe, Augusto S. [UNESP], Milsom, William K.
Tipo de documento: Artigo
Idioma: eng
Título da fonte: Repositório Institucional da UNESP
Texto Completo: http://dx.doi.org/10.1007/s00360-015-0928-2
http://hdl.handle.net/11449/160935
Resumo: This study was designed to determine the manner in which metabolism is suppressed during dormancy in black and white tegu lizards (Tupinambis merianae). To this end, heart rate (f (H)), respiration rate (f (R)), and deep body temperature (T (b)) were continuously monitored in outdoor enclosures by radio-telemetry for nine months. There was a continuous decline in nighttime breathing and heart rate, at constant T (b), throughout the late summer and fall suggestive of an active metabolic suppression that developed progressively at night preceding the entrance into dormancy. During the day, however, the tegus still emerged to bask. In May, when the tegus made a behavioural commitment to dormancy, T (b) (day and night) fell to match burrow temperature, accompanied by a further reduction in f (H) and f (R). Tegus, under the conditions of this study, did arouse periodically during dormancy. There was a complex interplay between changes in f (H) and T (b) associated with the direct effects of temperature and the indirect effects of thermoregulation, activity, and changes in metabolism. This interplay gave rise to a daily hysteresis in the f (H)/T (b) relationship reflective of the physiological changes associated with warming and cooling as preferred T (b) alternated between daytime and nighttime levels. The shape of the hysteresis curve varied with season along with changes in metabolic state and daytime and nighttime body temperature preferences.
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spelling Daily and annual cycles in thermoregulatory behaviour and cardio-respiratory physiology of black and white tegu lizardsReptilesTegu lizardsTorporDormancyHibernationCardiorespiratory controlSeasonal adjustmentsThis study was designed to determine the manner in which metabolism is suppressed during dormancy in black and white tegu lizards (Tupinambis merianae). To this end, heart rate (f (H)), respiration rate (f (R)), and deep body temperature (T (b)) were continuously monitored in outdoor enclosures by radio-telemetry for nine months. There was a continuous decline in nighttime breathing and heart rate, at constant T (b), throughout the late summer and fall suggestive of an active metabolic suppression that developed progressively at night preceding the entrance into dormancy. During the day, however, the tegus still emerged to bask. In May, when the tegus made a behavioural commitment to dormancy, T (b) (day and night) fell to match burrow temperature, accompanied by a further reduction in f (H) and f (R). Tegus, under the conditions of this study, did arouse periodically during dormancy. There was a complex interplay between changes in f (H) and T (b) associated with the direct effects of temperature and the indirect effects of thermoregulation, activity, and changes in metabolism. This interplay gave rise to a daily hysteresis in the f (H)/T (b) relationship reflective of the physiological changes associated with warming and cooling as preferred T (b) alternated between daytime and nighttime levels. The shape of the hysteresis curve varied with season along with changes in metabolic state and daytime and nighttime body temperature preferences.Conselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)Fundação de Amparo à Pesquisa do Estado de São Paulo (FAPESP)Fundação para o Desenvolvimento da UNESP (FUNDUNESP)Natural Sciences and Engineering Research Council of CanadaUniv British Columbia, Dept Zool, Vancouver, BC V6T 1Z4, CanadaBrock Univ, Dept Biol Sci, St Catharines, ON L2S 3A1, CanadaUniv Estadual Paulista, Inst Nacl Ciencia & Tecnol Fisiol Comparada, Dept Zool, BR-13506900 Rio Claro, SP, BrazilUniv Estadual Paulista, Inst Nacl Ciencia & Tecnol Fisiol Comparada, Dept Zool, BR-13506900 Rio Claro, SP, BrazilSpringerUniv British ColumbiaBrock UnivUniversidade Estadual Paulista (Unesp)Sanders, Colin E.Tattersall, Glenn J.Reichert, MichelleAndrade, Denis V. [UNESP]Abe, Augusto S. [UNESP]Milsom, William K.2018-11-26T16:17:19Z2018-11-26T16:17:19Z2015-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/article905-915application/pdfhttp://dx.doi.org/10.1007/s00360-015-0928-2Journal Of Comparative Physiology B-biochemical Systemic And Environmental Physiology. Heidelberg: Springer Heidelberg, v. 185, n. 8, p. 905-915, 2015.0174-1578http://hdl.handle.net/11449/16093510.1007/s00360-015-0928-2WOS:000363952300008WOS000363952300008.pdfWeb of Sciencereponame:Repositório Institucional da UNESPinstname:Universidade Estadual Paulista (UNESP)instacron:UNESPengJournal Of Comparative Physiology B-biochemical Systemic And Environmental Physiology0,952info:eu-repo/semantics/openAccess2023-11-23T06:10:08Zoai:repositorio.unesp.br:11449/160935Repositório InstitucionalPUBhttp://repositorio.unesp.br/oai/requestopendoar:29462024-08-05T18:28:19.410378Repositório Institucional da UNESP - Universidade Estadual Paulista (UNESP)false
dc.title.none.fl_str_mv Daily and annual cycles in thermoregulatory behaviour and cardio-respiratory physiology of black and white tegu lizards
title Daily and annual cycles in thermoregulatory behaviour and cardio-respiratory physiology of black and white tegu lizards
spellingShingle Daily and annual cycles in thermoregulatory behaviour and cardio-respiratory physiology of black and white tegu lizards
Sanders, Colin E.
Reptiles
Tegu lizards
Torpor
Dormancy
Hibernation
Cardiorespiratory control
Seasonal adjustments
title_short Daily and annual cycles in thermoregulatory behaviour and cardio-respiratory physiology of black and white tegu lizards
title_full Daily and annual cycles in thermoregulatory behaviour and cardio-respiratory physiology of black and white tegu lizards
title_fullStr Daily and annual cycles in thermoregulatory behaviour and cardio-respiratory physiology of black and white tegu lizards
title_full_unstemmed Daily and annual cycles in thermoregulatory behaviour and cardio-respiratory physiology of black and white tegu lizards
title_sort Daily and annual cycles in thermoregulatory behaviour and cardio-respiratory physiology of black and white tegu lizards
author Sanders, Colin E.
author_facet Sanders, Colin E.
Tattersall, Glenn J.
Reichert, Michelle
Andrade, Denis V. [UNESP]
Abe, Augusto S. [UNESP]
Milsom, William K.
author_role author
author2 Tattersall, Glenn J.
Reichert, Michelle
Andrade, Denis V. [UNESP]
Abe, Augusto S. [UNESP]
Milsom, William K.
author2_role author
author
author
author
author
dc.contributor.none.fl_str_mv Univ British Columbia
Brock Univ
Universidade Estadual Paulista (Unesp)
dc.contributor.author.fl_str_mv Sanders, Colin E.
Tattersall, Glenn J.
Reichert, Michelle
Andrade, Denis V. [UNESP]
Abe, Augusto S. [UNESP]
Milsom, William K.
dc.subject.por.fl_str_mv Reptiles
Tegu lizards
Torpor
Dormancy
Hibernation
Cardiorespiratory control
Seasonal adjustments
topic Reptiles
Tegu lizards
Torpor
Dormancy
Hibernation
Cardiorespiratory control
Seasonal adjustments
description This study was designed to determine the manner in which metabolism is suppressed during dormancy in black and white tegu lizards (Tupinambis merianae). To this end, heart rate (f (H)), respiration rate (f (R)), and deep body temperature (T (b)) were continuously monitored in outdoor enclosures by radio-telemetry for nine months. There was a continuous decline in nighttime breathing and heart rate, at constant T (b), throughout the late summer and fall suggestive of an active metabolic suppression that developed progressively at night preceding the entrance into dormancy. During the day, however, the tegus still emerged to bask. In May, when the tegus made a behavioural commitment to dormancy, T (b) (day and night) fell to match burrow temperature, accompanied by a further reduction in f (H) and f (R). Tegus, under the conditions of this study, did arouse periodically during dormancy. There was a complex interplay between changes in f (H) and T (b) associated with the direct effects of temperature and the indirect effects of thermoregulation, activity, and changes in metabolism. This interplay gave rise to a daily hysteresis in the f (H)/T (b) relationship reflective of the physiological changes associated with warming and cooling as preferred T (b) alternated between daytime and nighttime levels. The shape of the hysteresis curve varied with season along with changes in metabolic state and daytime and nighttime body temperature preferences.
publishDate 2015
dc.date.none.fl_str_mv 2015-12-01
2018-11-26T16:17:19Z
2018-11-26T16:17:19Z
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/10.1007/s00360-015-0928-2
Journal Of Comparative Physiology B-biochemical Systemic And Environmental Physiology. Heidelberg: Springer Heidelberg, v. 185, n. 8, p. 905-915, 2015.
0174-1578
http://hdl.handle.net/11449/160935
10.1007/s00360-015-0928-2
WOS:000363952300008
WOS000363952300008.pdf
url http://dx.doi.org/10.1007/s00360-015-0928-2
http://hdl.handle.net/11449/160935
identifier_str_mv Journal Of Comparative Physiology B-biochemical Systemic And Environmental Physiology. Heidelberg: Springer Heidelberg, v. 185, n. 8, p. 905-915, 2015.
0174-1578
10.1007/s00360-015-0928-2
WOS:000363952300008
WOS000363952300008.pdf
dc.language.iso.fl_str_mv eng
language eng
dc.relation.none.fl_str_mv Journal Of Comparative Physiology B-biochemical Systemic And Environmental Physiology
0,952
dc.rights.driver.fl_str_mv info:eu-repo/semantics/openAccess
eu_rights_str_mv openAccess
dc.format.none.fl_str_mv 905-915
application/pdf
dc.publisher.none.fl_str_mv Springer
publisher.none.fl_str_mv Springer
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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