Temperature effects on oxygen consumption and breathing pattern in juvenile and adult Chelonoidis carbonarius (Spix, 1824)

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Autor(es): dc.contributorUniversidade de São Paulo (USP)-
Autor(es): dc.contributorInstituto Federal do Paraná-
Autor(es): dc.contributorUniversidade Estadual Paulista (UNESP)-
Autor(es): dc.creatorOliveira, Paulo Roberto Custodio de-
Autor(es): dc.creatorAbe, Augusto S.-
Autor(es): dc.creatorKlein, Wilfried-
Data de aceite: dc.date.accessioned2025-08-21T15:22:40Z-
Data de disponibilização: dc.date.available2025-08-21T15:22:40Z-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2023-07-29-
Data de envio: dc.date.issued2022-12-31-
Fonte completa do material: dc.identifierhttp://dx.doi.org/10.1016/j.resp.2022.103978-
Fonte completa do material: dc.identifierhttp://hdl.handle.net/11449/246103-
Fonte: dc.identifier.urihttp://educapes.capes.gov.br/handle/11449/246103-
Descrição: dc.descriptionThe effects of temperature on breathing pattern and oxygen consumption are being investigated in juvenile tortoises and compared to adults, in order to understand physiological adjustments of the respiratory system as related to body size, especially regarding the energetic expenditure associated with growth. We analyzed the breathing pattern and oxygen consumption of juvenile and adult red-footed tortoises (Chelonoidis carbonarius, Cryptodira: Testudinidae). The animals (N = 9; body mass ranging from 0.03 Kg to 2.5 Kg) were exposed to normoxic-normocarbic conditions using open respirometry in order to determine the breathing pattern and oxygen consumption in three different temperatures (15, 25, 35 °C). The obtained results showed intermittent breathing pattern in all tested temperatures in juveniles and adults. Tidal volume was not affected by changes in temperature, while breathing frequency increased significantly with increasing temperature, leading to a significant increment in minute ventilation between 15 and 35 °C. Mass specific oxygen consumption increased significantly with temperature and juveniles showed greater values when compared to adults. The alterations in the ventilatory response to temperature changes occurred in order to maintain the oxygen supply with increased metabolic activity. The differences between juveniles and adults in breathing frequency lead to juveniles needing a lower ventilation rate to perform gas exchange while extracting more oxygen. While these differences might be attributed to a greater metabolic expenditure during development, scaling effects on respiratory variables might be the main contributors to the found differences.-
Descrição: dc.descriptionConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)-
Descrição: dc.descriptionPrograma de Pós-graduação em Biologia Comparada Universidade de São Paulo, SP-
Descrição: dc.descriptionInstituto Federal do Paraná Campus Avançado Goioerê, PR-
Descrição: dc.descriptionInstituto de Biociências Universidade Estadual Paulista, SP-
Descrição: dc.descriptionDepartamento de Biologia Faculdade de Filosofia Ciências e Letras de Ribeirão Preto Universidade de São Paulo, SP-
Descrição: dc.descriptionInstituto de Biociências Universidade Estadual Paulista, SP-
Descrição: dc.descriptionCNPq: 308249/2019–4-
Idioma: dc.languageen-
Relação: dc.relationRespiratory Physiology and Neurobiology-
???dc.source???: dc.sourceScopus-
Palavras-chave: dc.subjectGas exchange-
Palavras-chave: dc.subjectLife stage-
Palavras-chave: dc.subjectTemperature-
Palavras-chave: dc.subjectTestudines-
Palavras-chave: dc.subjectVentilation-
Título: dc.titleTemperature effects on oxygen consumption and breathing pattern in juvenile and adult Chelonoidis carbonarius (Spix, 1824)-
Tipo de arquivo: dc.typelivro digital-
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