Respiratory allocation and standard rate of metabolism in the African lungfish, Protopterus aethiopicus.

TitleRespiratory allocation and standard rate of metabolism in the African lungfish, Protopterus aethiopicus.
Publication TypeJournal Article
Year of Publication2006
JournalComparative biochemistry and physiology. Part A, Molecular & integrative physiology
Volume143
Issue1
Pagination142-8
ISSN1095-6433
Abstract

This paper quantifies the relationship between respiratory allocation (air vs. water) and the standard rate of metabolism (SMR) in the primitive air-breathing lungfish, Protopterus aethiopicus. Simultaneous measurements of oxygen consumed from both air and water were made to determine the SMR at ecologically relevant aquatic oxygen levels for juveniles 2 to 221 g. Total metabolic rate was positively correlated with body mass with a scaling exponent of 0.78. Aerial oxygen consumption averaged 98% (range=94% to 100%) of total respiratory allocation under low aquatic oxygen levels. Measurements of oxygen consumption made across a gradient of dissolved oxygen from normoxia to anoxia showed that P. aethiopicus maintains its SMR despite a change in respiratory allocation between water and air.

URLhttps://linkinghub.elsevier.com/retrieve/pii/S1095-6433(05)00385-5
DOI10.1016/j.cbpa.2005.11.016
Short TitleComp Biochem Physiol A Mol Integr Physiol
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