mammal_sleep: Mammalian sleep
In thomaspruf/fiwidat: Datasets for Vienna VetMedUni Statistics Class

mammal_sleep

R Documentation

Mammalian sleep

Description

Dataset from Allison and Cicchetti (1976) of 62 mammal species on the interrelationship between sleep, ecological, and constitutional variables. The dataset contains missing values on five variables.

Usage

data("mammal_sleep")

Format

A data frame with 62 observations on the following 11 variables.

species: Mammal species.
bodyweight: in kg.
brainweight: in g.
sws: Duration of slow wave sleep (h/d).
rem: Duration of rem sleep (h/d).
totalsleep: Duration of total sleep (h/d).
longevity: Maximum life span (years).
gestationtime: Duration of gestation (d).
predation: Predation risk index (1-5), 1 = least likely to be preyed upon.
sleepexposure: 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)

Details

Allison and Cicchetti (1976) investigated the interrelationship between sleep, ecological, and constitutional variables. They assessed these variables for 39 mammalian species. The authors concluded that slow-wave sleep is negatively associated with a factor related to body size. This suggests that large amounts of this sleep phase are disadvantageous in large species. Also, paradoxical sleep (REM sleep) was associated with a factor related to predatory danger, suggesting that large amounts of this sleep phase are disadvantageous in prey species.

Source

library 'mice' Stef van Buuren, Karin Groothuis-Oudshoorn (2011). mice: Multivariate Imputation by Chained Equations in R. Journal of Statistical Software, 45(3), 1-67. URL https://www.jstatsoft.org/v45/i03/.