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Maximal oxygen uptake in four species of small mammals



Maximal oxygen uptake in four species of small mammals



Respiration Physiology 9(2): 298-309



Pulmonary gas exchanges have been measured by a closed circuit method in four species of rodents at rest and during maximal exercise periods of one to two minutes on a motor-driven treadmill. Measurements were performed at temperatures of 30°, 6°, 3° and 10°C on warm- and cold-acclimatized mice, rats and guinea pigs, and in hamsters acclimatized to and running at 29°, 26° and 6 °C. As the animals were indiscutably exhausted by the heavy exercise imposed, the values obtained for the oxygen uptake rate, O2, were considered as maximal. Cold-acclimatized animals being more resistant to lower temperatures gave the highest values of O2 in exercise. The influence of the ambient temperature on maximal O2 differed among species.

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Accession: 023011283

Download citation: RISBibTeXText

PMID: 5445190

DOI: 10.1016/0034-5687(70)90078-2



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