Reproductive parameters of female orangutans (Pongo pygmaeus wurmbii) 1971–2011, a 40-year study at Tanjung Puting National Park, Central Kalimantan, Indonesia

Abstract. Fauzi F, Suemarno, Afandhi A, Leksono AS. 2020. Nesting behavior of Bornean immature Orangutan (Pongo pygmaeus wurmbii) in Nyaru Menteng Arboretum School, Palangka Raya, Central Kalimantan, Indonesia. Biodiversitas 21: 2172-2179. This research aimed at analyzing the nesting behavior of Bornean Orangutan (Pongo pygmaeus wurmbii) in Nyaru Menteng Arboretum, Palangka Raya, Central Kalimantan, Indonesia. The objects of observation were the immature orangutan nest, and the type of nest tree. The purposive sampling technique was used because not all immature Orangutan could make a nest. The Focal animal sampling method was used to determine the daily behavior and nets building activity. It involved observing and recording the behavior of five young Orangutans over a certain period of time and analyzing the nest made. The results of the study established that the daily activity of immature Orangutan on an average sequentially ranges from feeding 17.18%, moving 23.92%, resting 26.34%, and social behavior 32.57%. The process of making a nest begins with finding a suitable branch, bending and breaking twigs, and then arranging the twigs and leaves as a mattress. The duration of building a nest was 5.00 to 6.44 minutes, the preferred nest tree was Palaquium xanthochymum and Shorea spp., and the direction of the nest more facing west.

Download Full-text

Locomotor behavior of wild orangutans (pongo pygmaeus wurmbii) in disturbed peat swamp forest, Sabangau, Central Kalimantan, Indonesia

American Journal of Physical Anthropology ◽

10.1002/ajpa.21495 ◽

2011 ◽

Vol 145 (3) ◽

pp. 348-359 ◽

Cited By ~ 23

Author(s):

Kirsten L. Manduell ◽

Helen C. Morrogh-Bernard ◽

Susannah K.S. Thorpe

Keyword(s):

Locomotor Behavior ◽

Pongo Pygmaeus ◽

Swamp Forest ◽

Peat Swamp Forest ◽

Central Kalimantan ◽

Peat Swamp ◽

Pongo Pygmaeus Wurmbii

Download Full-text

The Bornean orangutan (Pongo pygmaeus wurmbii) density in a logging concession of Hulu Belantikan, Central Kalimantan, Indonesia

Biodiversitas Journal of Biological Diversity ◽

10.13057/biodiv/d200336 ◽

2019 ◽

Vol 20 (3) ◽

pp. 878-883 ◽

Cited By ~ 1

Author(s):

IMAN SAPARI ◽

DYAH PERWITASARI-FARAJALLAH ◽

SRI SUCI UTAMI ATMOKO

Keyword(s):

Selective Logging ◽

Pongo Pygmaeus ◽

Line Transect ◽

Natural Forests ◽

Central Kalimantan ◽

Protection Forest ◽

Critically Endangered Species ◽

Bornean Orangutan ◽

Large Trees ◽

Pongo Pygmaeus Wurmbii

Abstract. Sapari I, Perwitasari-Farajallah D, Utami Atmoko SS. 2019. The Bornean orangutan (Pongo pygmaeus wurmbii) density in a logging concession of Hulu Belantikan, Central Kalimantan, Indonesia. Biodiversitas 20: 878-883. The Bornean orangutan is currently categorized as a critically endangered species. It is found in natural forests in Borneo, where about 78% of the total population is found outside protected areas, of which 29% is in logging concessions. This study aimed to analyze the density of the orangutan population and the abundance of fruiting plants in a logging concession and Protection Forest (Hutan Lindung) in the Hulu Belantikan forests in Lamandau District, Central Kalimantan, Indonesia. Research and data collection was conducted between December 2013 to October 2014. Orangutan population density was calculated using line transect methodology based on nest counts. Abundance of fruit plants was calculated using the fruit trail method. The highest orangutan density, 4.8 individuals/km2, was found in Protection Forest; and the lowest density, 0.4 individuals/km2, was in [Sopanan] the 2013 logging block. Observations in the logging area indicated that selective logging could alter the structure and gap of the canopy and reduce the proportion of large trees. Changes in forest structure resulted in negative effects on the density of the orangutan population. The remaining degraded forests can still be a valuable resource for the orangutan. As long as the disturbance is not intensive, orangutans will retain access to the less disturbed forest nearby and to forests that are still connected to primary forests. The existence of Protection Forest and old logged-over forests around logging blocks are very important for conservation, providing refugia for orangutans and other species when logging occurs.

Download Full-text

Why do orangutans leave the trees? Terrestrial behavior among wild Bornean orangutans (Pongo pygmaeus wurmbii) at Tuanan, Central Kalimantan

American Journal of Primatology ◽

10.1002/ajp.22460 ◽

2015 ◽

Vol 77 (11) ◽

pp. 1216-1229 ◽

Cited By ~ 11

Author(s):

Alison M. Ashbury ◽

Mary Rose C. Posa ◽

Lynda P. Dunkel ◽

Brigitte Spillmann ◽

S. Suci Utami Atmoko ◽

...

Keyword(s):

Pongo Pygmaeus ◽

Central Kalimantan ◽

Pongo Pygmaeus Wurmbii ◽

Bornean Orangutans

Download Full-text

Parasitic load and self-medication of Bornean Orangutan (Pongo pygmaeus ssp. wurmbii) in Sebangau National Park Central Kalimantan Indonesia

IOP Conference Series Earth and Environmental Science ◽

10.1088/1755-1315/736/1/012055 ◽

2021 ◽

Vol 736 (1) ◽

pp. 012055

Author(s):

A Panda ◽

T S Djohan ◽

W T Artama ◽

D Priyowidodo

Keyword(s):

National Park ◽

Pongo Pygmaeus ◽

Self Medication ◽

Central Kalimantan ◽

Bornean Orangutan ◽

Parasitic Load

Download Full-text

Monthly range of adolescent orangutans (Pongo pygmaeus wurmbii) based on fruit availability in Tuanan Orangutan Research Station, Central Kalimantan, Indonesia

Biodiversitas Journal of Biological Diversity ◽

10.13057/biodiv/d180420 ◽

2017 ◽

Vol 18 (4) ◽

pp. 1445-1452

Author(s):

FAJAR SAPUTRA ◽

DYAH PERWITASARI- FARAJALLAH ◽

SRI SUCI UTAMI- ATMOKO ◽

TOMI ARIYANTO ◽

MARIA A. VAN NOORDWIJK

Keyword(s):

Home Range ◽

Newborn Infants ◽

Fruit Trees ◽

Pongo Pygmaeus ◽

Research Station ◽

Fruit Availability ◽

Central Kalimantan ◽

Focal Animal ◽

Pongo Pygmaeus Wurmbii ◽

Fallen Fruit

Setyawan. 2017. Monthly range of adolescent orangutans (Pongo pygmaeus wurmbii) based on fruit availability in Tuanan Orangutan Research Station, Central Kalimantan, Indonesia. Biodiversitas 18: 1445-1452. Adolescent orangutans become competitors with mothers supporting newborn infants. Thus, adolescent orangutans must coordinate with other orangutans in order to find fruit. How adolescent orangutans respond is reflected in the size and utilization of their home range area. The aims of our research were to determine (i) fruit availability, as an important component of orangutan diet, (ii) and the effect of fruit availability on home range use by adolescent orangutan. This research was conducted from August 2013 to July 2014 in Tuanan Orangutan Research Station, Central Kalimantan. The fruit trail method was used to estimate abundance of fruits (both from trees and lianas).Fallen fruit on census trails was assessed once per month, while focal animal sampling was used to estimate the home range by tagging a GPS point every 30 minutes during the tracking of an orangutan. In total, 62 tree and 15 liana species included in the known orangutan diet were fruiting during this study period. The highest period of fruit abundance for orangutan food occurred in November until January. Adolescent orangutans responded by increasing their monthly ranging area during this time of high fruit availability and decreased their range when fruit availability was low. Adolescent orangutans often used areas in their monthly range that had a high to medium abundance of fruit trees. When the number of trees bearing fruit decreased (low period), adolescent orangutans changed their monthly range to areas that consisted of medium to high abundance of liana fruit. Their ranging strategy optimized use of low quality habitat in order to survive in degraded forests.

Download Full-text

Symbolic consultation and cultural simplification in the establishment of an Indonesian national park and its impacts on local livelihoods

Forest and Society ◽

10.24259/fs.v5i2.11875 ◽

2021 ◽

pp. 494-505

Author(s):

Mei Meilani ◽

Wahyu Andayani ◽

Lies Rahayu Wijayanti Faida ◽

Fitria Dewi Susanti ◽

Rodd Myers ◽

...

Keyword(s):

Environmental Justice ◽

National Park ◽

Local Communities ◽

Livelihood Strategies ◽

Conservation Area ◽

Central Kalimantan ◽

Local Livelihoods ◽

Adverse Impacts ◽

The Social ◽

Diverse Cultures

This paper analyzes the processes by which the Sebangau National Park in Central Kalimantan (Indonesia) was established, along with the management activities implemented and the impacts of such activities on local communities. Employing an environmental justice lens, which revolved around procedural, recognition, and distribution issues, we found that local communities were not adequately consulted or involved in the establishment and management of the national park. Furthermore, approaches to mitigate the adverse impacts failed to fully consider the diverse cultures and customs with different livelihood strategies surrounding the park. The research also found that the options made available for local livelihoods were limited and did not meet specific needs and demands of certain ethnic groups. Overall, the transformation of the Sebangau production forest into a conservation area significantly disrupted local livelihoods and led to pronounced adverse economic, social, and cultural impacts. Thus, adequate attention to environmental justice must be made if park authorities are to improve the social acceptability of the national park. They should meaningfully engage the local communities in decision-making procedures related to park management, because they are directly impacted by the park. The authorities should also understand the different sociocultural aspects related to the local people surrounding the park and their different needs and livelihood strategies. Finally, the livelihood alternatives should be carefully assessed, and locals should be adequately consulted to ensure that these are socially and culturally accepted.

Download Full-text