A Continuum of Sleep and Shallow Torpor in Fasting Doves

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Science  08 Jul 1983:
Vol. 221, Issue 4606, pp. 194-195
DOI: 10.1126/science.221.4606.194


Fasting doves entered shallow torpor during nocturnal sleep. Body temperature dropped lower each successive night by 1° to 3° in parallel with diminished rapid-eye-movement sleep until torpor was composed almost entirely of slow-wave sleep at a body temperature of 30° to 32°C. Shallow torpor in doves, as in mammals, thus appears to lie on a metabolic continuum with sleep.