Abstract
Concentration of ketone bodies were studied during activity, deep hibernation and early arousal in marmots. The blood samples were obtained by sacrifice and by cannulation. The data from the cannulated animals indicated a rise in ketone bodies (all fractions) during hibernation. Samples obtained from the cannulated marmots also showed a fall in concentrations occured during arousal. On the other hand samples obtained by direct sacrifice of hibernating marmots indicated a fall in the ketone concentrations occurred - manipulation. The data were interpreted as being not incompatible with the hypothesis that ketonemia could be a “trigger” for the increased oxidative metabolism effecting arousal.
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