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Metabolism and Respiration of the Amazonian Manatee (Trichechus inunguis)

G. J. Gallivan and R. C. Best
Physiological Zoology
Vol. 53, No. 3 (Jul., 1980), pp. 245-253
Stable URL: http://www.jstor.org/stable/30155787
Page Count: 9
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Metabolism and Respiration of the Amazonian Manatee (Trichechus inunguis)
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Abstract

A study was made of respiration and metabolism in Amazonian manatees (Trichechus inunguis) weighing between 20 and 170 kg. These animals had a low metabolic rate, 0.36 times that predicted by Kleiber's 1975 equation for placental mammals. They also had a low breathing frequency and minute ventilation, and high O₂ extraction and CO₂ output. The mean dive times were less than 2 min but dives of up to 10 min-duration were noted. Sequential dive times exhibited a pattern only in that several short dives followed a prolonged one.

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