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

Ashley W. Seifert; Lauren J. Chapman

doi:10.1016/j.cbpa.2005.11.016

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

Ashley W. Seifert
, Lauren J. Chapman

Producción científica: Article › revisión exhaustiva

17 Citas (Scopus)

Resumen

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.

Idioma original	English
Páginas (desde-hasta)	142-148
Número de páginas	7
Publicación	Comparative Biochemistry and Physiology - A Molecular and Integrative Physiology
Volumen	143
N.º	1
DOI	https://doi.org/10.1016/j.cbpa.2005.11.016
Estado	Published - ene 2006

Nota bibliográfica

Funding Information:
Funding for this research was provided from the University of Florida, the National Science Foundation (IBN-0094393), the Wildlife Conservation Society, the Raney Fund, and Sigma Xi. Permission to conduct research in Uganda was acquired from the National Council for Science and Technology, the Office of the President, and Makerere University (Uganda). We thank the graduate students and field assistants at Lake Nabugabo for assistance with various aspects of this project. We also thank Frank Nordlie, Stephen Walsh, and Patrick Walsh for comments on an earlier version of this manuscript. Our experimental protocols for P. aethiopicus were approved by the University of Florida (IACUC project #Z090).

Financiación

Funding for this research was provided from the University of Florida, the National Science Foundation (IBN-0094393), the Wildlife Conservation Society, the Raney Fund, and Sigma Xi. Permission to conduct research in Uganda was acquired from the National Council for Science and Technology, the Office of the President, and Makerere University (Uganda). We thank the graduate students and field assistants at Lake Nabugabo for assistance with various aspects of this project. We also thank Frank Nordlie, Stephen Walsh, and Patrick Walsh for comments on an earlier version of this manuscript. Our experimental protocols for P. aethiopicus were approved by the University of Florida (IACUC project #Z090).

Financiadores	Número del financiador
Raney Fund
National Science Foundation (NSF)	IBN-0094393
Wildlife Conservation Society
Florida A and M University
Sigma Xia

ASJC Scopus subject areas

Aquatic Science
Animal Science and Zoology
Molecular Biology
Biochemistry
Physiology

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title = "Respiratory allocation and standard rate of metabolism in the African lungfish, Protopterus aethiopicus",

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.",

keywords = "Air breathing, Oxygen consumption, Protopteridae, Respiration",

author = "Seifert, \{Ashley W.\} and Chapman, \{Lauren J.\}",

note = "Funding Information: Funding for this research was provided from the University of Florida, the National Science Foundation (IBN-0094393), the Wildlife Conservation Society, the Raney Fund, and Sigma Xi. Permission to conduct research in Uganda was acquired from the National Council for Science and Technology, the Office of the President, and Makerere University (Uganda). We thank the graduate students and field assistants at Lake Nabugabo for assistance with various aspects of this project. We also thank Frank Nordlie, Stephen Walsh, and Patrick Walsh for comments on an earlier version of this manuscript. Our experimental protocols for P. aethiopicus were approved by the University of Florida (IACUC project \#Z090).",

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PY - 2006/1

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N2 - 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.

AB - 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.

KW - Air breathing

KW - Oxygen consumption

KW - Protopteridae

KW - Respiration

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DO - 10.1016/j.cbpa.2005.11.016

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AN - SCOPUS:31344461109

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VL - 143

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EP - 148

JO - Comparative Biochemistry and Physiology - A Molecular and Integrative Physiology

JF - Comparative Biochemistry and Physiology - A Molecular and Integrative Physiology

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

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ASJC Scopus subject areas

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