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All Journal Jurnal Ilmu Pertanian Indonesia MEDIA KONSERVASI
Julius Paolo Siregar
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Agriculture, Biological Sciences & Forestry Earth & Planetary Sciences Education

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Faktor–Faktor Penentu Keberhasilan Pelepasliaran Orangutan Sumatera (Pongo Abelii) di Taman Nasional Bukit Tigapuluh Yanto Santosa; Julius Paolo Siregar; Dones Rinaldi; Dede Aulia Rahman
Jurnal Ilmu Pertanian Indonesia Vol. 17 No. 3 (2012): Jurnal Ilmu Pertanian Indonesia
Publisher : Institut Pertanian Bogor

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (338.026 KB)

Abstract

Study on determinant factors on success of Sumatran orangutan reintroduction was done to all orangutans in reintroduction station (84 individual + 1 infant orangutan). This study was conducted from August to December 2006 in the Station of Orangutan Reintroduction Centre located in Buffer Zone of Bukit Tiga Puluh National Park. The purpose of this study was to measure the effects of determining factors to the success of orangutans reintroduction to their natural habitat and to identify other factors that give impact to the reintroduction success. Data were collected through direct observation of activities and daily behavior of orangutans using scan sampling and continuous recording methods as well as through interviews with officials. Data analysis was performed descriptively and quantitatively using statistical tests (chi–square) with 95% confidence interval. The results showed that there is a match between percentage of success of the reintroduction of the six criteria of reintroduction success. The results of chi–square indicates that determinant factors, such as age class, orangutan life history, treatment and duration of reintroduction stage, are correlated to the success of reintroduction activities.
Activity Budget of Ex-captive Sumatran Orangutan Post Release in Sumatran Orangutan Reintroduction Centre in Jambi Julius Paolo Siregar; Ani Mardiastuti; Rondang Sumurung Edonita Siregar
Media Konservasi Vol 23 No 1 (2018): Media Konservasi Vol. 23 No. 1 April 2018
Publisher : Department of Forest Resources Conservation and Ecotourism - IPB University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (766.823 KB) | DOI: 10.29244/medkon.23.1.99-106

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 reserachconducted on 13 individuals who were divided into two groups according to behavioral characteristic were seven individuals tame and six individualssemiwild. We recorded their activities for 9-10 days (7.290–8.100 minutes) after their released via instantaneous sampling method with a sampleinterval for 2 minutes. The results showed that group of semiwild spent duration on feeding (43%) higher than tame (28%), whereas tame spent onresting (55%) higher than semiwild (38%). Results of analysis on daily activities of two groups showed significant differences in resting, feeding andother activities among the two groups (n1=70; n2=56) have probability value of Mann Whitney Test resting: p=0,000<0,05; feeding:p=0,000<0,05; other activities: p=0,009<0,05. Only moving activity showed no significant difference results (n1= 70, n2=56; p=0,507>0,05).Semiwild group has activity budget similar to wild orangutans in natural habitat.Keywords: activity budget, ex-captive, sumatran orangutan 
Co-Authors Ani Mardiastuti DEDE AULIA RAHMAN Dones Rinaldi Rondang Sumurung Edonita Siregar YANTO SANTOSA