| mammalsleep {faraway} | R Documentation |
Sleep in Mammals: Ecological and Constitutional Correlates
Description
The mammalsleep data frame has 62 rows and 10 columns. Sleep in
Mammals: Ecological and Constitutional Correlates
Format
This data frame contains the following columns:
- body
body weight in kg
- brain
brain weight in g
- nondream
slow wave ("nondreaming") sleep (hrs/day)
- dream
paradoxical ("dreaming") sleep (hrs/day)
- sleep
total sleep (hrs/day) (sum of slow wave and paradoxical sleep)
- lifespan
maximum life span (years)
- gestation
gestation time (days)
- predation
-
predation index (1-5) 1 = minimum (least likely to be preyed upon) to 5 = maximum (most likely to be preyed upon)
- exposure
sleep exposure index (1-5) 1 = least exposed (e.g. animal sleeps in a well-protected den) 5 = most exposed
- danger
overall danger index (1-5) (based on the above two indices and other information) 1 = least danger (from other animals) 5 = most danger (from other animals)
Source
"Sleep in Mammals: Ecological and Constitutional Correlates" by Allison, T. and Cicchetti, D. (1976), Science, November 12, vol. 194, pp. 732-734.