The influence of circadian rhythms on the metabolism of the snake Bothrops jararaca (Serpentes, Viperidae) - DOI: 10.4025/actascibiolsci.v30i3.5030
Autor(a) principal: | |
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Data de Publicação: | 2008 |
Tipo de documento: | Artigo |
Idioma: | por eng |
Título da fonte: | Acta Scientiarum Biological Sciences |
Texto Completo: | http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5030 |
Resumo: | The thermoregulatory activity has led to an extensive search for correlations between physiological variables, including metabolic functions, and the ideal level of body temperature. Snakes were also often seen basking, when their body temperatures were relatively independent of ambient temperature, indicating successful thermoregulation. Bothrops jararaca were exposed to two different ambient temperatures (20 and 30ºC) over a time course of three weeks and oxygen consumption and body temperature were measured. The snakes exhibited a freerunning rhythm of body temperature. Metabolic rate was increased at the same circadian phase as the increase in body temperature in the 30ºC. The increase of body temperature and oxygen consumption of B. jararaca occurs in the scotophase of the photoperiod, consistent with that of nocturnal species. However, prior to a scotophase period the snakes under 20ºC maintain body temperature and oxygen consumption at higher levels during the day. These results demonstrate for the first time that ectothermic animals may display physiologically generated circadian rhythms of body temperature similar to those recorded in endotherms. Circadian rhythms allow animals to anticipate environmental changes: physiological parameters such as body temperature and mobilization of energy reserves have to be adjusted before the expected environmental changes actually take place. |
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The influence of circadian rhythms on the metabolism of the snake Bothrops jararaca (Serpentes, Viperidae) - DOI: 10.4025/actascibiolsci.v30i3.5030A influência dos ritmos circadianos no metabolismo da serpente Bothrops jararaca (Serpentes, Viperidae) - DOI: 10.4025/actascibiolsci.v30i3.5030oxygen consumptionreptilethermoregulationconsumo de oxigêniorépteistermorregulaçãoThe thermoregulatory activity has led to an extensive search for correlations between physiological variables, including metabolic functions, and the ideal level of body temperature. Snakes were also often seen basking, when their body temperatures were relatively independent of ambient temperature, indicating successful thermoregulation. Bothrops jararaca were exposed to two different ambient temperatures (20 and 30ºC) over a time course of three weeks and oxygen consumption and body temperature were measured. The snakes exhibited a freerunning rhythm of body temperature. Metabolic rate was increased at the same circadian phase as the increase in body temperature in the 30ºC. The increase of body temperature and oxygen consumption of B. jararaca occurs in the scotophase of the photoperiod, consistent with that of nocturnal species. However, prior to a scotophase period the snakes under 20ºC maintain body temperature and oxygen consumption at higher levels during the day. These results demonstrate for the first time that ectothermic animals may display physiologically generated circadian rhythms of body temperature similar to those recorded in endotherms. Circadian rhythms allow animals to anticipate environmental changes: physiological parameters such as body temperature and mobilization of energy reserves have to be adjusted before the expected environmental changes actually take place.A atividade termorreguladora conduziu a uma busca extensiva para o entendimento das correlações entre as variáveis fisiológicas, incluindo as funções metabólicas e a temperatura corporal. Frequentes observações mostram que algumas serpentes podem se aquecer, sendo este aumento de temperatura independente da temperatura ambiente, indicando a termorregulação bem sucedida. Bothrops jararaca foram expostas a dois ambientes com diferentes temperaturas (20 e 30oC) durante três semanas, sendo mensuradas a temperatura corporal e o consumo de oxigênio. O aumento da temperatura corporal e consumo de oxigênio de Bothrops jararaca ocorreram na fase de escuro do fotoperíodo, consistente para espécies noturnas. Entretanto, antecedendo a fase de escuro, as serpentes em 20oC apresentaram os níveis mais elevados durante o dia para temperatura corporal e consumo de oxigênio. Estes resultados indicam pela primeira vez que animais termodependentes podem controlar a temperatura corporal por meio de ritmos fisiológicos circadianos, semelhante aos observados em termoindependentes. Os ritmos circadianos permitem que os animais antecipem as mudanças no ambiente: parâmetros fisiológicos como a temperatura corporal e as reservas de energia ou sua mobilização podem ser ajustadas antes que as mudanças ambientais previstas ocorram realmente.Universidade Estadual De Maringá2008-09-12info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfapplication/pdfhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/503010.4025/actascibiolsci.v30i3.5030Acta Scientiarum. Biological Sciences; Vol 30 No 3 (2008); 327-331Acta Scientiarum. Biological Sciences; v. 30 n. 3 (2008); 327-3311807-863X1679-9283reponame:Acta Scientiarum Biological Sciencesinstname:Universidade Estadual de Maringá (UEM)instacron:UEMporenghttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5030/5030http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5030/3636Cruz, José Geraldo Pereira dainfo:eu-repo/semantics/openAccess2022-11-23T17:33:45Zoai:periodicos.uem.br/ojs:article/5030Revistahttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSciPUBhttp://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/oai||actabiol@uem.br1807-863X1679-9283opendoar:2022-11-23T17:33:45Acta Scientiarum Biological Sciences - Universidade Estadual de Maringá (UEM)false |
dc.title.none.fl_str_mv |
The influence of circadian rhythms on the metabolism of the snake Bothrops jararaca (Serpentes, Viperidae) - DOI: 10.4025/actascibiolsci.v30i3.5030 A influência dos ritmos circadianos no metabolismo da serpente Bothrops jararaca (Serpentes, Viperidae) - DOI: 10.4025/actascibiolsci.v30i3.5030 |
title |
The influence of circadian rhythms on the metabolism of the snake Bothrops jararaca (Serpentes, Viperidae) - DOI: 10.4025/actascibiolsci.v30i3.5030 |
spellingShingle |
The influence of circadian rhythms on the metabolism of the snake Bothrops jararaca (Serpentes, Viperidae) - DOI: 10.4025/actascibiolsci.v30i3.5030 Cruz, José Geraldo Pereira da oxygen consumption reptile thermoregulation consumo de oxigênio répteis termorregulação |
title_short |
The influence of circadian rhythms on the metabolism of the snake Bothrops jararaca (Serpentes, Viperidae) - DOI: 10.4025/actascibiolsci.v30i3.5030 |
title_full |
The influence of circadian rhythms on the metabolism of the snake Bothrops jararaca (Serpentes, Viperidae) - DOI: 10.4025/actascibiolsci.v30i3.5030 |
title_fullStr |
The influence of circadian rhythms on the metabolism of the snake Bothrops jararaca (Serpentes, Viperidae) - DOI: 10.4025/actascibiolsci.v30i3.5030 |
title_full_unstemmed |
The influence of circadian rhythms on the metabolism of the snake Bothrops jararaca (Serpentes, Viperidae) - DOI: 10.4025/actascibiolsci.v30i3.5030 |
title_sort |
The influence of circadian rhythms on the metabolism of the snake Bothrops jararaca (Serpentes, Viperidae) - DOI: 10.4025/actascibiolsci.v30i3.5030 |
author |
Cruz, José Geraldo Pereira da |
author_facet |
Cruz, José Geraldo Pereira da |
author_role |
author |
dc.contributor.author.fl_str_mv |
Cruz, José Geraldo Pereira da |
dc.subject.por.fl_str_mv |
oxygen consumption reptile thermoregulation consumo de oxigênio répteis termorregulação |
topic |
oxygen consumption reptile thermoregulation consumo de oxigênio répteis termorregulação |
description |
The thermoregulatory activity has led to an extensive search for correlations between physiological variables, including metabolic functions, and the ideal level of body temperature. Snakes were also often seen basking, when their body temperatures were relatively independent of ambient temperature, indicating successful thermoregulation. Bothrops jararaca were exposed to two different ambient temperatures (20 and 30ºC) over a time course of three weeks and oxygen consumption and body temperature were measured. The snakes exhibited a freerunning rhythm of body temperature. Metabolic rate was increased at the same circadian phase as the increase in body temperature in the 30ºC. The increase of body temperature and oxygen consumption of B. jararaca occurs in the scotophase of the photoperiod, consistent with that of nocturnal species. However, prior to a scotophase period the snakes under 20ºC maintain body temperature and oxygen consumption at higher levels during the day. These results demonstrate for the first time that ectothermic animals may display physiologically generated circadian rhythms of body temperature similar to those recorded in endotherms. Circadian rhythms allow animals to anticipate environmental changes: physiological parameters such as body temperature and mobilization of energy reserves have to be adjusted before the expected environmental changes actually take place. |
publishDate |
2008 |
dc.date.none.fl_str_mv |
2008-09-12 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5030 10.4025/actascibiolsci.v30i3.5030 |
url |
http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5030 |
identifier_str_mv |
10.4025/actascibiolsci.v30i3.5030 |
dc.language.iso.fl_str_mv |
por eng |
language |
por eng |
dc.relation.none.fl_str_mv |
http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5030/5030 http://www.periodicos.uem.br/ojs/index.php/ActaSciBiolSci/article/view/5030/3636 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Estadual De Maringá |
publisher.none.fl_str_mv |
Universidade Estadual De Maringá |
dc.source.none.fl_str_mv |
Acta Scientiarum. Biological Sciences; Vol 30 No 3 (2008); 327-331 Acta Scientiarum. Biological Sciences; v. 30 n. 3 (2008); 327-331 1807-863X 1679-9283 reponame:Acta Scientiarum Biological Sciences instname:Universidade Estadual de Maringá (UEM) instacron:UEM |
instname_str |
Universidade Estadual de Maringá (UEM) |
instacron_str |
UEM |
institution |
UEM |
reponame_str |
Acta Scientiarum Biological Sciences |
collection |
Acta Scientiarum Biological Sciences |
repository.name.fl_str_mv |
Acta Scientiarum Biological Sciences - Universidade Estadual de Maringá (UEM) |
repository.mail.fl_str_mv |
||actabiol@uem.br |
_version_ |
1799317394150129664 |