Abstract
Excaptive orangutans were not have a proportional activity budget for their suitable food, so that many individuals have been failed to adapt. Assessment daily activity budget should to have for excaptive orangutans to determine successful adaptation to independent life. Our reserach conducted on 13 individuals who were divided into two groups according to behavioral characteristic were seven individuals tame and six individuals semiwild. We recorded their activities for 9-10 days (7.290–8.100 minutes) after their released via instantaneous sampling method with a sample interval for 2 minutes. The results showed that group of semiwild spent duration on feeding (43%) higher than tame (28%), whereas tame spent on resting (55%) higher than semiwild (38%). Results of analysis on daily activities of two groups showed significant differences in resting, feeding and other activities among the two groups (n1=70; n2=56) have probability value of Mann Whitney Test resting: p=0,000 0,05). Semiwild group has activity budget similar to wild orangutans in natural habitat. Keywords: activity budget, ex-captive, sumatran orangutan
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