Daily and annual cycles in thermoregulatory behaviour and cardio-respiratory physiology of black and white tegu lizards
Autor(a) principal: | |
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Data de Publicação: | 2015 |
Outros Autores: | , , , , |
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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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 |
|
_version_ |
1808128937153265664 |