. The Ecology of arboreal folivores : a symposium held at the Conservation and Research Center, National Zoological Park, Smithsonian Institution, May 29-31, 1975 . TEMPERATURE DIFFER ENTIAL,Tb-TQ (°C) Figure 9. Homeostatic power output in Bradypus and Choloepus as a function of the temperature differential between the body and environment. Based on the data in Figures 1 and 2, assuming that the mean body weight for Bradypus is kg and for Choloepus is kg. (11°C, Figure 9, Table 2). Its homeostatic expenditures varied between () and watts ( kcal/hr). The expenditures f
. The Ecology of arboreal folivores : a symposium held at the Conservation and Research Center, National Zoological Park, Smithsonian Institution, May 29-31, 1975 . TEMPERATURE DIFFER ENTIAL,Tb-TQ (°C) Figure 9. Homeostatic power output in Bradypus and Choloepus as a function of the temperature differential between the body and environment. Based on the data in Figures 1 and 2, assuming that the mean body weight for Bradypus is kg and for Choloepus is kg. (11°C, Figure 9, Table 2). Its homeostatic expenditures varied between () and watts ( kcal/hr). The expenditures for Choloepus are greater than those for Bradypus because it is larger, has a higher basal rate, and has a poorer fur coat (in lacking the wool undercoat) than Bradypus. HOMEOSTASIS - â HOMEOSTASIS- wism BWiiiiiiiiiiiiiinimii, « wniiiiiiiii. 40 o UJ cr => h-30 < rr Ld Q_ UJ So. * 6 ⢠⢠° ⢠. ⢠o .to ° o o o o 0 o o 0 O 0 o o x x xx x oo*o0 r o 0 0 o o i XX XX X X *xx o BRADYPUS ⢠CHOLOEPUS X AIR TEMP. * xx 5 TIME OF DAY (HOURS) Figure 10. The relation of body temperature, activity, and energy expenditure to time of day in Bradypus and Choloepus. Data from Montgomery and Sunquist (personal communication). For means of calculating energy expenditure, see text. 158 Brian K. McNab
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