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

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.

scholarly journals Nesting behavior of Bornean immature Orangutan (Pongo pygmaeus wurmbii) in Nyaru Menteng Arboretum School, Palangka Raya, Central Kalimantan, Indonesia

2020 ◽  
Vol 21 (5) ◽  
Author(s):  
Fouad Fauzi ◽  
Soemarno Soemarno ◽  
Aminudin Afandhi ◽  
Amin Setyo Leksono
Keyword(s):  
Sampling Method ◽  
Sampling Technique ◽  
Pongo Pygmaeus ◽  
Nesting Behavior ◽  
Central Kalimantan ◽  
Bornean Orangutan ◽  
Focal Animal ◽  
Daily Behavior ◽  
Building Activity ◽  
Pongo Pygmaeus Wurmbii

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.

Home range establishment and the mechanisms of philopatry among female Bornean orangutans (Pongo pygmaeus wurmbii) at Tuanan

2020 ◽  
Vol 74 (4) ◽  
Author(s):  
Alison M. Ashbury ◽  
Erik P. Willems ◽  
Sri Suci Utami Atmoko ◽  
Fajar Saputra ◽  
Carel P. van Schaik ◽  
...  
Keyword(s):  
Home Range ◽  
Pongo Pygmaeus ◽  
Pongo Pygmaeus Wurmbii ◽  
Bornean Orangutans

AKTIVITAS SOSIAL ORANGUTAN (Pongo pygmaeus wurmbii) DI STASIUN PENELITIAN CABANG PANTI TAMAN NASIONAL GUNUNG PALUNG KABUPATEN KAYONG UTARA KALIMANTAN BARAT

2019 ◽  
Vol 7 (1) ◽  
Author(s):  
. Samhudi ◽  
Harri Prayogo ◽  
Slamet Rifanjani
Keyword(s):  
Adult Male ◽  
Social Activity ◽  
Observation Time ◽  
Research Station ◽  
West Kalimantan ◽  
Focal Animal ◽  
The Social ◽  
Pongo Pygmaeus Wurmbii ◽  
Waking Up ◽  
Movement Activities

Diverse types of habitat were interesting objects which existed in the Cabang Panti Research Station, due to it, the researcher was interested to investigate about Orangutan’s activities in one type of habitat and the researcher focused on Orangutan’s social activities. The purpose of this study was to determine the social behavior of orangutans in the Research Station cabang panti gunung palung national park in Kayong Utara District, West Kalimantan. The used method was focal animal sampling, a method of observing and recording the behavior of one individual over a certain period of time while the object must be visible during observation and the data collection in this study focused on adult male and / or female orangutans as the objects in the study. The length of observation time of the target orangutan in this study was  + 13 hours per day for 5 days by concerning the daily activities of orangutans from waking up to sleeping. Based on the results of the observed object, there were 2 individuals namely Walimah which was an adult female and Julian which was an adult male. Overall, during the observations, the two individuals were following each other, the target orangutan “Walimah” had high eating activities throughout the day reaching 41,31% followed by movement activities 25,18%, then resting 23,18%, self-action 9,96%, and social activity 0,37%. While the target orangutan "Julian" carried out high resting activities throughout the day reaching 40,15% followed by eating activities 28,45%, movement 22,71%, self-action 7,73%, and social activity 0,97%.Keywords: Cabang Panti, Orangutan, Social Activity

scholarly journals KARAKTERISTIK DAN KERAPATAN SARANG ORANGUTAN (Pongo pygmaeus wurmbii) DI DUA TIPE HABITAT YANG BERBEDA DI STASIUN PENELITIAN CABANG PANTI TAMAN NASIONAL GUNUNG PALUNG KABUPATEN KAYONG UTARA

2019 ◽  
Vol 7 (1) ◽  
Author(s):  
Arif Firman Hakim ◽  
Hari Prayogo ◽  
Sarma Siahaan
Keyword(s):  
Pongo Pygmaeus ◽  
Line Transect ◽  
Research Station ◽  
Swamp Forest ◽  
Trunk Diameter ◽  
Line Transect Survey ◽  
Peat Swamp ◽  
Sample Test ◽  
Pongo Pygmaeus Wurmbii ◽  
Alluvial Bench

Cabang Panti Research Station has diverse habitat, therefore the researchers are interested to conducting a research on the characteristic and densities of Orangutan nests (Pongo pygmaeus wurmbii) in two on different habitat namely in alluvial bench forests and peat swamp forests. The purpose of this study want to see a comparison of the characteristic and density as an Orangutan nest (Pongo pygmaeus wurmbii) in two different habitat types. The method used in this research was Line transect survey. The nests were searched by walking through the midline while observing and recording the discovered nests in the line transect. Based on the result of the Independent Sample Test, it showed that there was no difference of tree trunk diameter, but there was a difference of height of the nest tree and the nest itself. The nest position was almost similar which was position 3 (tip top) in the amount of 83% in alluvial bench habitat while it was position 1 (among the main branching) in the amount of 42% and 3 (the canopy of the tree in form of fork) in the amount of 42%. The class of the nest which mostly found in both habitat was nest class D in the amount of 50% in the alluvial bench habitat and 83% in the peat swamp forest. The type of tree which was mostly used by the Orangutan to create their nest in both habitat was Shorea spp. The densities of the nest of Orangutan was 30 nest/km² in the alluvial bench habitat and 60 nest/km² in the peat swamp habitat.      Keyword: Cabang Panti, Nest Characteristics, Nest Densities, Orangutan

scholarly journals PEMANFAATAN RUANG VERTIKAL PADA AKTIVITAS HARIAN ORANGUTAN (Pongo pygmaeus wurmbii) DI STASIUN RISET CABANG PANTI TAMAN NASIONAL GUNUNG PALUNG, KALIMANTAN BARAT

2020 ◽  
Vol 19 (1) ◽  
pp. 21-28
Author(s):  
Awit Mulyawarman ◽  
Tri Rima Setyawati ◽  
Riyandi Riyandi
Keyword(s):  
Natural Habitat ◽  
Age Groups ◽  
Young Male ◽  
Tree Height ◽  
Tree Canopy ◽  
Pongo Pygmaeus ◽  
Daily Activities ◽  
Time Interval ◽  
Research Station ◽  
Pongo Pygmaeus Wurmbii

Orangutans are solitary animals from the Pongidae family. There are three sub-species of Bornean orangutans, i.e. Pongo pygmaeus wurmbii, P. pygmaeus pygmaeus and P. pygmaeus morio, all of which are highly endangered. Orangutans carry out several daily activities such as eating, moving, resting, and nesting in the tree canopy. However, it has yet remains unknown on how their behaviours vary with tree height. This study aimed to determine the frequency of presence, daily activities of orangutans, and vertical space utilization in orangutan activities in the natural habitat of the Panti Branch Research Station, Gunung Palung National Park. This study used the Focal Animal Sampling method with a two minute time interval for ± 12 hours and was studied for over six months. The focal orangutans whose activities were recorded during the study consisted of 12 individuals divided into 3 age groups, namely the adult, adolescent, and juvenile age groups. The results showed that the daily activity of orangutan was observed on 36 species of trees with the greatest frequency found on Garcinia sp. and Syzigium sp. accounted for33% each. The female orangutans were found to be more dominant in feeding activities (3.93 per day), while male orangutans spent more time for resting activities (4.56 hours per day). The utilization of vertical space in young male orangutans took place in tall trees and eating activities occurred at an altitude of 33.6 m. On average, teenage female orangutans choose tree to make their nests in trees 30 m high. 

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

2019 ◽  
Vol 20 (3) ◽  
pp. 878-883 ◽  
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.

scholarly journals After the smoke has cleared: Extended low fruit productivity following forest fires decreased gregariousness and social tolerance among wild female Bornean orangutans (Pongo pygmaeus wurmbii)

2021 ◽  
Author(s):  
Alison M. Ashbury ◽  
Jade Meric de Bellefon ◽  
Julia A. Kunz ◽  
Misdi Abdullah ◽  
Anna M. Marzec ◽  
...  
Keyword(s):  
Forest Fires ◽  
Extended Period ◽  
Pongo Pygmaeus ◽  
Food Sources ◽  
Social Tolerance ◽  
Wild Female ◽  
Fruit Availability ◽  
Adult Females ◽  
Pongo Pygmaeus Wurmbii ◽  
Bornean Orangutans

AbstractAs climate change continues to fundamentally alter resource landscapes, the ability to flexibly respond to spatio-temporal changes in the distribution of preferred food sources is increasingly important for the overall health and fitness of animals living in seasonal, variable, and/or changing environments. Here, we investigate the effects of an uncharacteristically long period of fruit scarcity, following widespread thick haze caused by peat and forest fires in 2015, on the behaviour and sociality of female Bornean orangutans (Pongo pygmaeus wurmbii). We collected data from 2010 to 2018 at Tuanan, Central Kalimantan, Indonesia, and compared the activity, diet, and association patterns of adult females during low-fruit periods before the fires, i.e., regular, seasonal periods of low fruit availability (“pre-fire”), and after the fires, i.e., during the extended period of low fruit availability (“post-fire”). First, we found that, post-fire, female orangutans adopted a more extreme energy-saving activity pattern and diet — resting more, travelling less, and diet-switching to less-preferred foods — compared to pre-fire. Second, we found that the probabilities of association between females and their weaned immature offspring, and between related and unrelated adult females were lower, and the probability of agonism between unrelated females was higher, post-fire than pre-fire. This change in energetic strategy, and the general reduction in gregariousness and social tolerance, demonstrates how forest fires can have lasting consequences for orangutans. Fission–fusion species such as orangutans can mitigate the effects of changes in resource landscapes by altering their (sub)grouping patterns; however, this may have long-term indirect consequences on their fitness.

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

2015 ◽  
Vol 77 (11) ◽  
pp. 1216-1229 ◽  
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
Sign in / Sign up

Export Citation Format

Share Document