dictionary { *! Data originally published by Allison, T. & Cicchetti, D. V. (1976) *! , as part of a study of correlates of sleep in *! mammals; a subset (the first 3 variables below) appears in Table 6.6 of *! Weisberg (1985) . *! *! The data show average values for 62 species of mammals; note that some *! values are missing. The last 3 variables below (is_prey, expos_sl, and *! indanger) are ordered categories, where 1 = least and 5 = most with *! respect to the attribute in question. Note also that slow wave sleep *! (swav_sl) is known as `non-dreaming' sleep, whereas paradoxical sleep *! (pdox_sl) is known as `dreaming' sleep. * str25 species "Mammal species" body_wt "Body Weight (kg)" brain_wt "Brain Weight (g)" swav_sl "Slow wave sleep (hrs/day)" pdox_sl "Paradoxical sleep (hrs/day)" totsleep "Total sleep (hrs/day)" lifespan "Maximum life span (yrs)" gestate "Gestation time (days)" byte is_prey "Likely to be preyed upon?" byte expos_sl "Exposed during sleep?" byte indanger "In danger from other animals?" } "African elephant" 6654 5712 . . 3.3 38.6 645 3 5 3 "African giant pouched rat" 1 6.6 6.3 2 8.3 4.5 42 3 1 3 "Arctic fox" 3.385 44.5 . . 12.5 14 60 1 1 1 "Arctic ground squirrel" .92 5.7 . . 16.5 . 25 5 2 3 "Asian elephant" 2547 4603 2.1 1.8 3.9 69 624 3 5 4 "Baboon" 10.55 179.5 9.1 .7 9.8 27 180 4 4 4 "Big brown bat" .023 .3 15.8 3.9 19.7 19 35 1 1 1 "Brazilian tapir" 160 169 5.2 1 6.2 30.4 392 4 5 4 "Cat" 3.3 25.6 10.9 3.6 14.5 28 63 1 2 1 "Chimpanzee" 52.16 440 8.3 1.4 9.7 50 230 1 1 1 "Chinchilla" .425 6.4 11 1.5 12.5 7 112 5 4 4 "Cow" 465 423 3.2 .7 3.9 30 281 5 5 5 "Desert hedgehog" .55 2.4 7.6 2.7 10.3 . . 2 1 2 "Donkey" 187.1 419 . . 3.1 40 365 5 5 5 "E. American mole" .075 1.2 6.3 2.1 8.4 3.5 42 1 1 1 "Echidna" 3 25 8.6 0 8.6 50 28 2 2 2 "European hedgehog" .785 3.5 6.6 4.1 10.7 6 42 2 2 2 "Galago" .2 5 9.5 1.2 10.7 10.4 120 2 2 2 "Genet" 1.41 17.5 4.8 1.3 6.1 34 . 1 2 1 "Giant armadillo" 60 81 12 6.1 18.1 7 . 1 1 1 "Giraffe" 529 680 . .3 . 28 400 5 5 5 "Goat" 27.66 115 3.3 .5 3.8 20 148 5 5 5 "Golden hamster" .12 1 11 3.4 14.4 3.9 16 3 1 2 "Gorilla" 207 406 . . 12 39.3 252 1 4 1 "Gray seal" 85 325 4.7 1.5 6.2 41 310 1 3 1 "Gray wolf" 36.33 119.5 . . 13 16.2 63 1 1 1 "Ground squirrel" .101 4 10.4 3.4 13.8 9 28 5 1 3 "Guinea pig" 1.04 5.5 7.4 .8 8.2 7.6 68 5 3 4 "Horse" 521 655 2.1 .8 2.9 46 336 5 5 5 "Human" 62 1320 6.1 1.9 8 100 267 1 1 1 "Jaguar" 100 157 . . 10.8 22.4 100 1 1 1 "Kangaroo" 35 56 . . . 16.3 33 3 5 4 "Lesser short-tailed shrew" .005 .14 7.7 1.4 9.1 2.6 21.5 5 2 4 "Little brown bat" .01 .25 17.9 2 19.9 24 50 1 1 1 "Mole rat" .122 3 8.2 2.4 10.6 . 30 2 1 1 "Mountain beaver" 1.35 8.1 8.4 2.8 11.2 . 45 3 1 3 "Mouse" .023 .4 11.9 1.3 13.2 3.2 19 4 1 3 "Musk shrew" .048 .33 10.8 2 12.8 2 30 4 1 3 "N. American opossum" 1.7 6.3 13.8 5.6 19.4 5 12 2 1 1 "Nine-banded armadillo" 3.5 10.8 14.3 3.1 17.4 6.5 120 2 1 1 "Okapi" 250 490 . 1 . 23.6 440 5 5 5 "Owl monkey" .48 15.5 15.2 1.8 17 12 140 2 2 2 "Patas monkey" 10 115 10 .9 10.9 20.2 170 4 4 4 "Phalanger" 1.62 11.4 11.9 1.8 13.7 13 17 2 1 2 "Pig" 192 180 6.5 1.9 8.4 27 115 4 4 4 "Rabbit" 2.5 12.1 7.5 .9 8.4 18 31 5 5 5 "Raccoon" 4.288 39.2 . . 12.5 13.7 63 2 2 2 "Rat" .28 1.9 10.6 2.6 13.2 4.7 21 3 1 3 "Red fox" 4.235 50.4 7.4 2.4 9.8 9.8 52 1 1 1 "Rhesus monkey" 6.8 179 8.4 1.2 9.6 29 164 2 3 2 "Rock hyrax (a)" .75 12.3 5.7 .9 6.6 7 225 2 2 2 "Rock hyrax (b)" 3.6 21 4.9 .5 5.4 6 225 3 2 3 "Roe deer" 14.83 98.2 . . 2.6 17 150 5 5 5 "Sheep" 55.5 175 3.2 .6 3.8 20 151 5 5 5 "Slow loris" 1.4 12.5 . . 11 12.7 90 2 2 2 "Star-nosed mole" .06 1 8.1 2.2 10.3 3.5 . 3 1 2 "Tenrec" .9 2.6 11 2.3 13.3 4.5 60 2 1 2 "Tree hyrax" 2 12.3 4.9 .5 5.4 7.5 200 3 1 3 "Tree shrew" .104 2.5 13.2 2.6 15.8 2.3 46 3 2 2 "Vervet" 4.19 58 9.7 .6 10.3 24 210 4 3 4 "Water opossum" 3.5 3.9 12.8 6.6 19.4 3 14 2 1 1 "Yellow-bellied marmot" 4.05 17 . . . 13 38 3 1 1