Resting and field metabolic rates of adult male yellow-bellied marmots, Marmota flaviventris.
Resting metabolic rate (RMR) and field metabolic rate (FMR) of wild-caught males were estimated from oxygen consumption and the doubly-labeled water method, respectively. The average FMR:RMR ratio of 6.9 was much greater than ratios reported for other mammals. Total FMR (kJ/day) increased and specific RMR (kJ/kg/day) decreased with time. Neither total RMR nor specific FMR were significantly related to time. The decrease in specific RMR may result from a circannual decrease in maintenance expenditure and a seasonal increase in body mass. Total FMR may increase through the season as conditions for male activity become more favorable.
Salsbury
C M
CM
Department of Systematics and Ecology, University of Kansas, Lawrence 66045-2106.
Armitage
K B
KB
D000818:Animals; D001835:Body Weight / Q000502:physiology; D002245:Carbon Dioxide / Q000378:metabolism; D004734:Energy Metabolism / Q000502:physiology; D008297:Male; D008392:Marmota / Q000378:metabolism / Q000502:physiology*; D008660:Metabolism / Q000502:physiology*; D010101:Oxygen Consumption / Q000502:physiology; D012146:Rest / Q000502:physiology*; D012621:Seasons
D002245:Carbon Dioxide