Abstract
The character of oxygen tension distribution and peculiarities of cytochromes stoichiometry in skeletal muscles of bottom and pelagic species of marine fish were compared. It is shown, that the limitation of muscle activity increases the number of hypoxic zones in the muscle tissue. The mitochondrial electron-transporting chain then obtain the uncompensated type of organization, expressed in the increase of the share of the terminal complex aa3 on the background of general reduction of cytochromes content in the muscles. The reaction is of an adaptive character and can be implemented by pelagic fish species in conditions of experimental hypokinesia.
MeSH terms
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Adaptation, Physiological
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Animals
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Black Sea
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Blood Gas Analysis
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Cytochromes b / genetics
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Cytochromes b / metabolism*
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Cytochromes c / genetics
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Cytochromes c / metabolism*
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Cytochromes c1 / genetics
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Cytochromes c1 / metabolism*
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Electron Transport Complex IV / genetics
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Electron Transport Complex IV / metabolism*
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Energy Metabolism / physiology
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Fishes
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Gene Expression
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Hypoxia / metabolism
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Hypoxia / physiopathology
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Mitochondria / physiology
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Motor Activity / physiology
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Muscle, Skeletal / physiology*
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Oxygen / metabolism*
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Oxygen Consumption / physiology*
Substances
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Cytochromes c
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Cytochromes b
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Cytochromes c1
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Electron Transport Complex IV
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Oxygen