. The Ecology of arboreal folivores : a symposium held at the Conservation and Research Center, National Zoological Park, Smithsonian Institution, May 29-31, 1975. Folivores; Forest ecology; Leaves; Mammals; Mammals. Table 9.—The frequency with which trees having various quantities of lianas growing in their crowns were found on sample areas on BCI, and the use which sloths made of trees with various amounts of lianas in their crowns. On the 2 sample areas, 298 trees having 15 cm or greater dbh were examined, and the amount of lianas in their crowns was scored on a scale of 1 = none to 4 = man
. The Ecology of arboreal folivores : a symposium held at the Conservation and Research Center, National Zoological Park, Smithsonian Institution, May 29-31, 1975. Folivores; Forest ecology; Leaves; Mammals; Mammals. Table 9.—The frequency with which trees having various quantities of lianas growing in their crowns were found on sample areas on BCI, and the use which sloths made of trees with various amounts of lianas in their crowns. On the 2 sample areas, 298 trees having 15 cm or greater dbh were examined, and the amount of lianas in their crowns was scored on a scale of 1 = none to 4 = many. Sloths were radiolocated on the sample areas a total of 687 times. For comparison, the amount of lianas in the crowns of trees used by sloths elsewhere on BCI, as indicated by a total of 2253 radiolocations, is shown. Percent of 298 trees on sample areas Percent of 629 radiolocations of three-toed sloths on the areas Percent of 58 radiolocations of two-toed sloths on the areas Lianas in tree crown 49 Some Many. 83; 3df; p < x2 = 55; 3df; p < Percent of 1877 radiolocations of three-toed sloths on BCI Percent of 376 radiolocations of two-toed sloths on BCI 23 X2 = 444; 3df; p < 69_J sloths tended to use trees with only moderate amounts of lianas. Almost 50 percent of the 298 trees on the sample areas lacked lianas in their crowns (Table 9), while some 20 percent of them had many lianas growing in and through their crowns. Only 9 percent of the radiolocations of three-toed sloths and 3 percent of the radiolocations of two-toed sloths on the sample areas were in trees without lianas. There was thus an obvious avoidance of trees lacking lianas. Two-toed sloths were radiolocated 65 percent of the time in the 21 percent of trees which had many lianas; however, three-toed sloths were radiolocated in those trees only 23 percent of the time. About 50 percent of the radiolocations of three-toed sloths were in the 13 percent of trees that had only mod- erate am
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