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Science 12 November 1976:
Vol. 194. no. 4266, pp. 732 - 734
DOI: 10.1126/science.982039
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Articles

Science, Vol 194, Issue 4266, 732-734
Copyright © 1976 by American Association for the Advancement of Science

articles

Sleep in mammals: ecological and constitutional correlates

T Allison and DV Cicchetti

The interrelationships between sleep, ecological, and constitutional variables were assessed statistically for 39 mammalian species. Slow-wave sleep is negatively associated with a factor related to body size, which suggests that large amounts of this sleep phase are disadvantageous in large species. Paradoxical sleep is associated with a factor related to predatory danger, which suggests that large amounts of this sleep phase are disadvantageous in prey species.


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Science. ISSN 0036-8075 (print), 1095-9203 (online)