| Respiratory and metabolic responses of the spiny rats Proechimys yonenagae and P. iheringi to CO2. | |
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MedLine Citation:
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PMID: 9574873 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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The recently described burrow-dwelling Proechimys yonenagae from the Brazilian semiarid caatinga was compared to P. iheringi from the Brazilian rain forest of Mata Atlântica in terms of interactions between body temperature (Tb), ventilation (VE) and oxygen consumption (V(O2)) during hypercapnia (5 or 10% CO2). Wistar rats were also used as a control. VE was measured by plethysmography, Tb by inserting a probe into the colon, and V(O2) by a close-flow system. During air breathing, VE did not differ between the rodents, Wistar Tb was elevated compared to P. yonenagae, and the V(O2) values of P. yonenagae and P. iheringi were significantly lower than those of Wistar rats. Hypercapnia caused hyperventilation in the three rodents, hypothermia in P. yonenage and Wistar rats, but no change in V(O2) was observed in any of the rodents. The hypercapnia-induced hyperventilation may be a major factor producing heat loss. This effect was independent of V(O2). Comparisons of the two spiny rat species suggest little adaptation of P. yonenagae to hypercapnia in burrows. |
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Authors:
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R C Barros; E S Oliveira; P L Rocha; L G Branco |
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Publication Detail:
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Type: Comparative Study; Journal Article; Research Support, Non-U.S. Gov't |
Journal Detail:
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Title: Respiration physiology Volume: 111 ISSN: 0034-5687 ISO Abbreviation: Respir Physiol Publication Date: 1998 Feb |
Date Detail:
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Created Date: 1998-06-15 Completed Date: 1998-06-15 Revised Date: 2009-11-11 |
Medline Journal Info:
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Nlm Unique ID: 0047142 Medline TA: Respir Physiol Country: NETHERLANDS |
Other Details:
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Languages: eng Pagination: 223-31 Citation Subset: IM; S |
Affiliation:
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Departamento de Fisoliogia, Faculade de Odontologia de Ribeirão Preto, Universidade de São Paulo, SP, Brasil. |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Acclimatization Adaptation, Physiological Animals Body Temperature Climate Hypercapnia / physiopathology* Hyperventilation / physiopathology Hypothermia / physiopathology Male Muridae / metabolism, physiology* Oxygen Consumption Rats Rats, Wistar Respiration / physiology* Species Specificity |
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