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Orang-utans’ (Pongo pygmaeus wurmbii) Activity Pattern in Camp Release and Feeding Site of Lamandau Wildlife Sanctuary, Central Borneo, Indonesia

Journal of Tropical Biodiversity and Biotechnology · Vol. 8 No. 1 (2023)

DOI
10.22146/jtbb.70001
ISSN
2540-9581, 2540-9573
Terbit
2023-02-17
Penerbit
Universitas Gadjah Mada
Bahasa
eng
Lisensi
creativecommons.org/licenses/by-sa/4.0

Abstrak

The Bornean orang-utan (Pongo pygmaeus wurmbii) release process at Lamandau Wildlife Reserve applies the soft-release method. In this method, there is still provisioning additional food on the feeding site by human. The existence of camp release and feeding sites in the vicinity of release forests is assumed to have an impact on orang-utans’ activity patterns. This assumption is related to the principle of releasing them into their natural forest habitat, namely by reducing direct interaction between humans and orang-utans. The aims of this research were: (i) to measure the intensities of orang-utan presence on camp and feeding site, (ii) to analyze the correlation between phenology and orang-utan’s presence on camp and feeding site, and (iii) to assess orang-utan’s activity budgets, diet composition, and vertical used on camp, feeding site, and forest. Activity budgets of five group orang-utans with different categories based on age and sex were compared using the focal animal sampling method and instantaneous records. The analysis showed no correlation between the intensities of orang-utan presence and phenology. However, there were significant differences in activity patterns between adult and adolescent orang-utans. The findings revealed that adult orang-utans activity pattern tended to be high in resting at all observation locations while adolescents spending more their activity for feeding. Orang-utans at 0-10 m of height classes tend to do more activity. Almost all orang-utans feed on a non-forest diet (45-67%) in the camp release, feeding site, and surrounding. We assumed that the existence of a camp release and feeding site near the release point are affecting factors in a successful reintroduction of ex-rehabilitate orang-utans.

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  • IPB University
  • Liverpool John Moores University
  • Nasional University
  • National Research and Innovation Agency
  • University of Zurich
  • German Primate Center
  • Czech University of Life Sciences Prague
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Rekan penulisOrganisasiArtikel bersama
Achmad FarajallahIPB University4
Yeni Aryati MulyaniIPB University3
Entang IskandarIPB University3
Andre PasethaIPB University2
Puji RiantiIPB University2
Huda Shalahudin DarusmanIPB University2
Hana Intishar SawitriIPB University2
Tommy Langgeng AbimanyuIPB University2
Muladno MuladnoIPB University2
Maria UlfahIPB University2
Dewi Apri AstutiIPB University1
Indira Nurul QomariahIPB University1
Eka arismayantiIPB University1
Waterman James O.Liverpool John Moores University1
Islamul HadiIPB University1
Bambang SuryobrotoIPB University1
Dondin SajuthiIPB University1
Joko PamungkasNational Research and Innovation Agency1
Alexander NaterUniversity of Zurich1
Michael KrützenIPB University1
Chairunas Adha PutraIPB University1
Muhammad AgilIPB University1
Lisa M. DanishGerman Primate Center1
Antje EngelhardtLiverpool John Moores University1
Sodikin SodikinUniversitas Islam Negeri Raden Intan Lampung1
Riki HerliansyahInstitut Teknologi Kalimantan1
Alexander Kurniawan Sariyanto PuteraIPB University1
Stanislav LhotaCzech University of Life Sciences Prague1
Indra PurnamaIPB University1
Vallen Sakti MaulanaIPB University1
Annisa Devi RachmawatiIPB University1
RizaldiAfiliasi tidak diketahui1
Uus SaepulohIPB University1
Ruhama Maya SariIPB University1
Alfiyan AchmadIPB University1
Achmad AlfiyanIPB University1

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Sumber metadata: OAI-PMH (metadata jurnal) https://jurnal.ugm.ac.id/jtbb/oai, pertama di-harvest 9 Nov 2026, terakhir terlihat 9 Nov 2026.
Metadata asli (oai_dc) 
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	<dc:title xml:lang="en-US">Orang-utans’ (Pongo pygmaeus wurmbii) Activity Pattern in Camp Release and Feeding Site of Lamandau Wildlife Sanctuary, Central Borneo, Indonesia</dc:title>
	<dc:creator>Amalia, Novita</dc:creator>
	<dc:creator>Perwitasari-Farajallah, Dyah</dc:creator>
	<dc:creator>Utami-Atmoko, Sri Suci</dc:creator>
	<dc:creator>Purbatrapsila, Azhari</dc:creator>
	<dc:subject xml:lang="en-US">Biology; animal behaviour</dc:subject>
	<dc:subject xml:lang="en-US">Lamandau WR, Pongo pygmaeus wurmbii, Reintroduction</dc:subject>
	<dc:description xml:lang="en-US">The Bornean orang-utan (Pongo pygmaeus wurmbii) release process at Lamandau Wildlife Reserve applies the soft-release method. In this method, there is still provisioning additional food on the feeding site by human. The existence of camp release and feeding sites in the vicinity of release forests is assumed to have an impact on orang-utans’ activity patterns. This assumption is related to the principle of releasing them into their natural forest habitat, namely by reducing direct interaction between humans and orang-utans. The aims of this research were: (i) to measure the intensities of orang-utan presence on camp and feeding site, (ii) to analyze the correlation between phenology and orang-utan’s presence on camp and feeding site, and (iii) to assess orang-utan’s activity budgets, diet composition, and vertical used on camp, feeding site, and forest. Activity budgets of five group orang-utans with different categories based on age and sex were compared using the focal animal sampling method and instantaneous records. The analysis showed no correlation between the intensities of orang-utan presence and phenology. However, there were significant differences in activity patterns between adult and adolescent orang-utans. The findings revealed that adult orang-utans activity pattern tended to be high in resting at all observation locations while adolescents spending more their activity for feeding. Orang-utans at 0-10 m of height classes tend to do more activity. Almost all orang-utans feed on a non-forest diet (45-67%) in the camp release, feeding site, and surrounding. We assumed that the existence of a camp release and feeding site near the release point are affecting factors in a successful reintroduction of ex-rehabilitate orang-utans.   </dc:description>
	<dc:publisher xml:lang="en-US">Universitas Gadjah Mada</dc:publisher>
	<dc:contributor xml:lang="en-US">Orang-utan Foundation UK</dc:contributor>
	<dc:contributor xml:lang="en-US">Nature Agency</dc:contributor>
	<dc:contributor xml:lang="en-US">Lamandau Wildlife Reserve</dc:contributor>
	<dc:date>2023-02-17</dc:date>
	<dc:type>info:eu-repo/semantics/article</dc:type>
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	<dc:identifier>https://journal.ugm.ac.id/jtbb/article/view/70001</dc:identifier>
	<dc:identifier>10.22146/jtbb.70001</dc:identifier>
	<dc:source xml:lang="en-US">Journal of Tropical Biodiversity and Biotechnology; Vol 8, No 1 (2023): April; jtbb70001</dc:source>
	<dc:source>2540-9581</dc:source>
	<dc:source>2540-9573</dc:source>
	<dc:language>eng</dc:language>
	<dc:relation>https://journal.ugm.ac.id/jtbb/article/view/70001/35751</dc:relation>
	<dc:relation>https://journal.ugm.ac.id/jtbb/article/downloadSuppFile/70001/18858</dc:relation>
	<dc:relation>https://journal.ugm.ac.id/jtbb/article/downloadSuppFile/70001/18859</dc:relation>
	<dc:relation>https://journal.ugm.ac.id/jtbb/article/downloadSuppFile/70001/18860</dc:relation>
	<dc:coverage xml:lang="en-US">Indonesia</dc:coverage>
	<dc:coverage xml:lang="en-US"></dc:coverage>
	<dc:coverage xml:lang="en-US">Behaviour data</dc:coverage>
	<dc:rights xml:lang="en-US">Copyright (c) 2023 Journal of Tropical Biodiversity and Biotechnology</dc:rights>
	<dc:rights xml:lang="en-US">http://creativecommons.org/licenses/by-sa/4.0</dc:rights>
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