| Scaling of respiratory areas in relation to oxygen consumption of vertebrates. | |
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MedLine Citation:
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PMID: 6373357 Owner: NLM Status: MEDLINE |
Abstract/OtherAbstract:
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Resting oxygen consumption is generally related to the 0.75 power of the body mass. More recent studies on the morphometry of the lungs and gills of vertebrates indicate that the respiratory surfaces increase in area more closely to M1.0. A possible explanation is that the gas exchange surface is more to be related to the maximum oxygen uptake capacity, rather than to the resting condition. However, recent studies, especially in African mammals, suggest that Vo2max scales to a power similar to that for resting oxygen consumption and hence cannot be directly related to the respiratory surfaces. In fishes the situation seems to be different as Vo2max appears to increase more rapidly than standard Vo2. Consequently, the ratio between these two is greater in larger specimens and hence they have a greater scope for activity. A possible interpretation of this apparent difference may be related to differences in ventilation, as the tidal ventilation of lungs can lead to a reduction in the difference in oxygen pressure across the exchange surface, whereas in fish gills with increasing size and increasing water velocity there would be a reduction in the resistance to gas transfer. However, it is important to appreciate that such generalizations probably do not hold in all cases and the position of intermediate groups of vertebrates needs to be more closely assessed. |
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Authors:
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G M Hughes |
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Publication Detail:
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Type: Comparative Study; Journal Article; Review |
Journal Detail:
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Title: Experientia Volume: 40 ISSN: 0014-4754 ISO Abbreviation: Experientia Publication Date: 1984 Jun |
Date Detail:
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Created Date: 1984-07-24 Completed Date: 1984-07-24 Revised Date: 2006-11-15 |
Medline Journal Info:
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Nlm Unique ID: 0376547 Medline TA: Experientia Country: SWITZERLAND |
Other Details:
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Languages: eng Pagination: 519-24 Citation Subset: IM |
Export Citation:
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APA/MLA Format Download EndNote Download BibTex |
| MeSH Terms | |
Descriptor/Qualifier:
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Animals Body Composition Fishes / physiology Mammals / physiology Models, Biological Oxygen Consumption* Respiration* Vertebrates / physiology* |
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine
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