Resting respiratory behavior in minimally instrumented toads - effects of very long apneas on blood gases and pH
Braz. j. biol
; 63(1): 35-45, Feb. 2003. ilus, tab, graf
Artigo
em Inglês
| LILACS
| ID: lil-343393
Biblioteca responsável:
BR1.1
ABSTRACT
Resting respiratory behavior of Bufo marinus in minimally instrumented toads is described for a period of 24 hours in which the animals are left undisturbed. Torpor-related long apneas are described and their implications for blood gas levels are investigated. Results show that the resting ventilation rate of Bufo marinus is much lower than that reported so far. Levels of arterial oxygen, carbon dioxide, and pH are monitored during artificial long apneas induced by anesthesia. The toads showed an unexpected ability to unload carbon dioxide by non-respiratory means, even while being kept on dry plastic box with no access to water. Oxygen arterial partial pressure dropped to very low levels after one hour of apnea. This suggests that these animals may endure very well severe hypoxia for long periods of time while in torpor
Texto completo:
Disponível
Coleções:
Bases de dados internacionais
Base de dados:
LILACS
Assunto principal:
Apneia
/
Descanso
/
Bufo marinus
Tipo de estudo:
Estudo diagnóstico
Limite:
Animais
Idioma:
Inglês
Revista:
Braz. j. biol
Assunto da revista:
Biologia
Ano de publicação:
2003
Tipo de documento:
Artigo
/
Documento de projeto
País de afiliação:
Brasil
/
Estados Unidos
Instituição/País de afiliação:
The University of Texas at Arlington/US
/
Universidade do Estado do Rio de Janeiro/BR