. The Ecology of arboreal folivores : a symposium held at the Conservation and Research Center, National Zoological Park, Smithsonian Institution, May 29-31, 1975 . 5 months of summer rainfall 5 months of winter rainfall Distribution of koalas Figure 1. Distribution of the koala throughout Australia. MI = Magnetic Island; PI = Philip Island; KI = Kangaroo Island; S = Sydney. of tritium-labeled water (TOH) (Richmond, Langham, and Trujillo, 1962). The measurements were carried out during summer on 9 wild koalas representing the 3 geographical races (Figure 1). Three individuals from Magnetic Isl
. The Ecology of arboreal folivores : a symposium held at the Conservation and Research Center, National Zoological Park, Smithsonian Institution, May 29-31, 1975 . 5 months of summer rainfall 5 months of winter rainfall Distribution of koalas Figure 1. Distribution of the koala throughout Australia. MI = Magnetic Island; PI = Philip Island; KI = Kangaroo Island; S = Sydney. of tritium-labeled water (TOH) (Richmond, Langham, and Trujillo, 1962). The measurements were carried out during summer on 9 wild koalas representing the 3 geographical races (Figure 1). Three individuals from Magnetic Island (P. c. adustus), 3 from Sydney (P. c. cinereus), and 3 from Philip Island (P. c. victor) were studied. The mean body weights of koalas from the 3 races were kg, kg, and kg, respec- tively. Environmental conditions are not markedly different in the 3 locations (Australian Bureau of Meteorology). There were no significant differences between the 3 samples with respect to total body water, water turnover rate, and biological half-life (t ), and the results were pooled (Table 1). The homogeneity of these results indicates that, irrespective of geographical location, the microhabitat of the koala remains rather constant, at least with re- spect to water requirements and supply. The preformed water content of Eucalyptus punctata leaves lies be- tween 45 and 50 percent (Table 2), indicating that, when there is a plentiful food supply, there should also be a plentiful water supply provided by the leaves. It can be assumed that the leaves of other species of Eucalyptus contain at least as much water as those of E. punctata since a level of water content below about 164 Robert Degabriele
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Keywords: ., bookcentury1900, bookcolle, booksubjectleaves, booksubjectmammals
