Arnold Feliciano Sitompul

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Increasingly, habitat fragmentation caused by agricultural and human development has forced Sumatran elephants into relatively small areas, but there is little information on how elephants use these areas and thus, how habitats can be managed to sustain elephants in the future. Using a Global Positioning System (GPS) collar and a land cover map developed(More)
The manufacture and use of tools in great apes may provide insights into the evolution of hominid cognitive abilities [1] and technology [2]. So far, the common chimpanzee (Pan troglodytes) is the only nonhuman species known to show extensive manufacture and flexible use of tools in nature [2], suggesting that these skills arose only in the(More)
Tool manufacture and use have been described for wild orangutans (Pongo pygmaeus), with appreciable interpopulational differences in tool complexes. The ecological factors that contribute to these differences require investigation. Significant interpopulational differences in diet suggest that ecological factors contribute to variation in tool-based insect(More)
Increasingly, habitat fragmentation by agricultural and human development has forced Sumatran elephants (Elephas maximus sumatranus) into relatively small areas; yet, there is no information on the movements and home range behaviors of elephants on Sumatra. Using a GPS collar, we estimated the home range sizes of an adult female elephant (one of a herd of(More)
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