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1
Orangutan, Bukit Lawang / Indonesia, Sumatra
Orangutan, Bukit Lawang / Indonesia, Sumatra
::2009/12/03::
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2
Sumatran Orangutans - critically endangered
Sumatran Orangutans - critically endangered
::2010/10/18::
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3
The Sumatran Orangutan
The Sumatran Orangutan
::2014/03/08::
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4
Close encounter with Sumatran Orangutan
Close encounter with Sumatran Orangutan
::2011/01/19::
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5
Feeding Sumatran Orangutan At Toronto Zoo
Feeding Sumatran Orangutan At Toronto Zoo
::2012/06/05::
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6
Sumatran Orangutan Birthday Hug.wmv
Sumatran Orangutan Birthday Hug.wmv
::2012/05/08::
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7
BBC Wild Nature: Sumatra, Orangutan Sanctuary - Indonesian Fire Islands
BBC Wild Nature: Sumatra, Orangutan Sanctuary - Indonesian Fire Islands
::2008/08/29::
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8
Zoo View Sumatran Orangutan-Cincinnati Zoo
Zoo View Sumatran Orangutan-Cincinnati Zoo
::2010/06/22::
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9
Sumatran orangutans
Sumatran orangutans' rainforest home faces new threat
::2013/05/05::
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10
Adult male Sumatran Orangutan at feeding station at Bohorok Rehabilitation Station, North Sumatra
Adult male Sumatran Orangutan at feeding station at Bohorok Rehabilitation Station, North Sumatra
::2012/07/06::
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11
Sumatran Orangutan Infomercial Video
Sumatran Orangutan Infomercial Video
::2014/06/12::
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12
Orangutans in wild Sumatra
Orangutans in wild Sumatra
::2013/01/20::
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13
Sumatran Orangutan Society - FREE
Sumatran Orangutan Society - FREE
::2008/12/11::
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14
Menari the Sumatran orangutan turns 4 at Audubon Zoo!
Menari the Sumatran orangutan turns 4 at Audubon Zoo!
::2013/06/10::
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15
Abenteuer Wissen - Orang-Utans auf Sumatra 1/4
Abenteuer Wissen - Orang-Utans auf Sumatra 1/4
::2011/01/08::
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16
sumatran orangutan society
sumatran orangutan society
::2010/01/27::
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17
Marini Ferlazzo - Sumatran Orangutan illustration
Marini Ferlazzo - Sumatran Orangutan illustration
::2013/07/06::
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18
The Sumatran Orangutan: Ending Palm Oil Deforestation
The Sumatran Orangutan: Ending Palm Oil Deforestation
::2012/05/23::
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19
Baby Sumatran orangutan shown the ropes in San Diego zoo
Baby Sumatran orangutan shown the ropes in San Diego zoo
::2014/01/29::
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20
Nakd Chats With - SUMATRAN ORANGUTAN SOCIETY (SOS)
Nakd Chats With - SUMATRAN ORANGUTAN SOCIETY (SOS)
::2010/09/21::
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21
Save Armstrong - Sumatran Orangutan Society
Save Armstrong - Sumatran Orangutan Society
::2013/08/05::
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22
Sumatran Orangutan Release in Bukit Tigapuluh, Sumatra
Sumatran Orangutan Release in Bukit Tigapuluh, Sumatra
::2012/09/24::
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23
Sumatran Orangutan Home Under Threat
Sumatran Orangutan Home Under Threat
::2013/06/03::
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24
erste Bilder: Sumatra-Orang-Utan Baby @ Tierpark Hellabrunn, München
erste Bilder: Sumatra-Orang-Utan Baby @ Tierpark Hellabrunn, München
::2014/02/07::
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25
Blind Sumatran orangutan give birth to healthy twins
Blind Sumatran orangutan give birth to healthy twins
::2011/11/02::
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26
SAVE THE SUMATRAN ORANGUTAN FROM EXTINCTION
SAVE THE SUMATRAN ORANGUTAN FROM EXTINCTION
::2014/07/24::
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27
San Diego Zoo introduces new baby Sumatran orangutan to public: Aisha is three months old
San Diego Zoo introduces new baby Sumatran orangutan to public: Aisha is three months old
::2014/01/29::
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28
Duncan Law reads a statement from Helen Buckland of SOS Sumatran Orangutan Society
Duncan Law reads a statement from Helen Buckland of SOS Sumatran Orangutan Society
::2013/07/15::
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29
OPCFHK USSP 2012 - Conservation of Sumatran Orangutan in Indonesia (HKUST)
OPCFHK USSP 2012 - Conservation of Sumatran Orangutan in Indonesia (HKUST)
::2012/07/16::
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30
Sumatran Orangutans: Ian Redmond
Sumatran Orangutans: Ian Redmond's Welcome
::2013/05/13::
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31
SUMATRA ORANGUTAN FOREST TREK
SUMATRA ORANGUTAN FOREST TREK
::2008/09/10::
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32
The Plight Of The Sumatran Orangutan-By Craig Jones
The Plight Of The Sumatran Orangutan-By Craig Jones
::2013/09/22::
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33
Sumatran orangutan turns 21 at Audubon Zoo!
Sumatran orangutan turns 21 at Audubon Zoo!
::2014/02/06::
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34
Sumatran Orangutan Conservation in Aceh
Sumatran Orangutan Conservation in Aceh
::2013/05/08::
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35
Sumatran Orangutan in Bukit Lawang
Sumatran Orangutan in Bukit Lawang
::2014/04/11::
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36
Sumatran Orangutan - part 3 (Indonesian language)
Sumatran Orangutan - part 3 (Indonesian language)
::2009/05/13::
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37
Bornean Orangutan Vs Mountain Gorilla & Bonobo Vs Sumatran Orangutan
Bornean Orangutan Vs Mountain Gorilla & Bonobo Vs Sumatran Orangutan
::2014/08/30::
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38
Sumatran Orangutan Time Lapse Illustration
Sumatran Orangutan Time Lapse Illustration
::2013/06/09::
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39
Sumatran orangutan
Sumatran orangutan
::2013/12/06::
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40
Susie, Sumatran Orangutan, Artist at Work
Susie, Sumatran Orangutan, Artist at Work
::2014/08/26::
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41
New Sumatran Orangutan-Cincinnati Zoo
New Sumatran Orangutan-Cincinnati Zoo
::2010/06/11::
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42
Sumatran Orangutan Swinging Outdoors
Sumatran Orangutan Swinging Outdoors
::2010/08/22::
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43
Cheyenne Mountain Zoo
Cheyenne Mountain Zoo's Sumatran Orangutan, Baka, Dancing
::2014/01/14::
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44
Sumatran Orangutan - Part 1 (Indonesian language)
Sumatran Orangutan - Part 1 (Indonesian language)
::2009/05/13::
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45
Wild Sumatran orangutan mother and baby wrestling
Wild Sumatran orangutan mother and baby wrestling
::2010/03/24::
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46
Update on Perth Zoo Orangutan Semeru in Sumatra 2012
Update on Perth Zoo Orangutan Semeru in Sumatra 2012
::2012/09/20::
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47
Super Sumatran Orangutan
Super Sumatran Orangutan
::2011/09/29::
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Stevie D
Stevie D's Primate Behavioral Study: Sumatran Orangutan
::2014/06/04::
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Sumatran Orang-utan
Sumatran Orang-utan
::2014/07/11::
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Endangered Species : Sumatran Orangutan
Endangered Species : Sumatran Orangutan
::2014/05/19::
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From Wikipedia, the free encyclopedia
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Sumatran orangutan[1]
Orangutan-Columbus-zoo.JPG
Male Sumatran orangutan
SUMATRAN ORANGUTAN.jpg
Female Sumatran orangutan
Conservation status
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Primates
Family: Hominidae
Subfamily: Ponginae
Genus: Pongo
Species: P. abelii
Binomial name
Pongo abelii
Lesson, 1827
Mapa distribuicao pongo abelii.png
Distribution in Indonesia

The Sumatran orangutan (Pongo abelii) is one of the two species of orangutans. Found only on the island of Sumatra, in Indonesia, it is rarer than the Bornean orangutan.

Physical description[edit]

The Sumatran orangutan grows to about 1.4 m (4.6 ft) tall and 90 kg (200 lb) in males. Females are smaller, averaging 90 cm (3.0 ft) and 45 kg (99 lb). Compared to the Bornean species, Sumatran orangutans are thinner and have longer faces; their hair is longer with a paler red color.[3]

Behaviour and ecology[edit]

Sumatran Orangutan at Bukit Lawang

Compared with the Bornean orangutan, the Sumatran orangutan tends to be more frugivorous and especially insectivorous.[4] Preferred fruits include figs and jackfruits. It will also eat bird eggs and small vertebrates.[5] Sumatran orangutans spend far less time feeding on the inner bark of trees.

Wild Sumatran orangutans in the Suaq Balimbing swamp have been observed using tools.[6] An orangutan will break off a tree branch that is about a foot long, snap off the twigs and fray one end. It then will use the stick to dig in tree holes for termites. They will also use the stick to poke a bee's nest wall, move it around and catch the honey. In addition, orangutans use tools to eat fruit. When the fruit of the Neesia tree ripens, its hard, ridged husk softens until it falls open. Inside are seeds that the orangutans enjoy eating, but they are surrounded by fiberglass-like hairs that are painful if eaten. A Neesia-eating orangutan will select a five-inch stick, strip off its bark, and then carefully collect the hairs with it. Once the fruit is safe, the ape will eat the seeds using the stick or its fingers. Although similar swamps can be found in Borneo, wild Bornean orangutans have not been seen using these types of tools.

NHNZ filmed the Sumatran orangutan for its show Wild Asia: In the Realm of the Red Ape; it showed one of them using a simple tool, a twig, to pry food from difficult places. There is also a sequence of an animal using a large leaf as an umbrella in a tropical rainstorm.

The Sumatran orangutan is also more arboreal than its Bornean cousin; this could be because of the presence of large predators like the Sumatran Tiger. It moves through the trees by quadrumanous locomotion and semibrachiation.

Life cycle[edit]

The Sumatran orangutan is more social than its Bornean counterpart; groups gather to feed on the mass amounts of fruit on fig trees. However, adult males generally avoid contact with other adult males. Subadult males will try to mate with any female, though they probably mostly fail, since mature females are easily capable of fending them off. Mature females prefer to mate with mature males. Male Sumatran orangutans sometimes have a delay of many years in the development of secondary sexual characteristics, such as cheek flanges and muscle mass.[7]

The average interbirth rates for the Sumatran orangutan is 9.3 years, the longest reported among the great apes, including the Bornean orangutan. Infant orangutans will stay close to their mothers for up to three years. Even after that, the young will still associate with their mothers. Both orangutan species are likely to live several decades; estimated longevity is more than 50 years. The average of the first reproduction of P. abelii is around 15.4 years old. There is no indication of menopause.[4]

Nonja, thought to be the world's oldest in captivity or the wild at the time of her death, died at the Miami MetroZoo at the age of 55.[8]

Conservation status[edit]

A Sumatran orangutan at Bukit Lawang

The Sumatran orangutan is endemic to Sumatra island and is particularly restricted to the north of the island. In the wild, Sumatran orangutans survive in the province of Nanggroe Aceh Darussalam (NAD), the northernmost tip of Sumatra.[9] The primate was once more widespread, as they were found more to the south in the 19th century such as in Jambi and Padang.[10] There are small populations in the North Sumatra province along the border with NAD, particularly in the Lake Toba forests. A survey in the Lake Toba region found only two inhabited areas, Bukit Lawang (defined as the animal sanctuary) and Gunung Leuser National Park.[11] The species has been assessed as critically endangered on the IUCN Red List since 2000.[2] It is considered one of "The World's 25 Most Endangered Primates."[12]

A survey in 2004 estimated that around 7,300 Sumatran orangutans still live in the wild.[9] Some of them are being protected in five areas in Gunung Leuser National Park; others live in unprotected areas: northwest and northeast Aceh block, West Batang Toru river, East Sarulla and Sidiangkat. A successful breeding program has been established in Bukit Tiga Puluh National Park in Jambi and Riau provinces. The main reason for the endangerment of these orangutans is because of palm oil companies destroying the native rain forests.

Genomics[edit]

Genomic information
NCBI genome ID 325
Ploidy diploid
Genome size 3,441.24 Mb
Number of chromosomes 24 pairs
Year of completion 2011

Orangutans have 48 chromosomes.[13] The Sumatran orangutan genome was sequenced in January 2011, based on a captive female named Susie.[14] Following humans and chimpanzees, the Sumatran orangutan has become the third extant hominid[15] species to have its genome sequenced.[14][16]

The researchers also published less complete copies from 10 wild orangutans, five from Borneo and five from Sumatra. The genetic diversity was found to be lower in Bornean orangutans (Pongo pygmaeus) than in Sumatran ones (Pongo abelii), despite the fact that Borneo is home to six or seven times as many orangutans as Sumatra. The comparison has shown these two species diverged around 400,000 years ago, more recently than was previously thought. The orangutan genome also has fewer rearrangements than the chimpanzee/human lineage.[14] The full sequence and annotation can be viewed on the Ensembl Genome Browser.

See also[edit]

References[edit]

  1. ^ Groves, C. P. (2005). Wilson, D. E.; Reeder, D. M, eds. Mammal Species of the World (3rd ed.). Baltimore: Johns Hopkins University Press. OCLC 62265494. ISBN 0-801-88221-4. 
  2. ^ a b Singleton, I., Wich, S. A. & Griffiths, M. (2008). Pongo abelii. In: IUCN 2008. IUCN Red List of Threatened Species. Retrieved 4 January 2009.
  3. ^ Primate Info Net: Orangutan Pongo
  4. ^ a b S. A. Wich; S. S. Utami-Atmoko; T. M. Setia; H. D. Rijksen; C. Schürmann, J.A.R.A.M. van Hooff and C. P. van Schaik (2004). "Life history of wild Sumatran orangutans (Pongo abelii)". Journal of Human Evolution 47 (6): 385–398. doi:10.1016/j.jhevol.2004.08.006. PMID 15566945. 
  5. ^ "Science & Nature - Wildfacts - Sumatran orangutan". BBC. Retrieved 2009-07-03. 
  6. ^ Zimmer, Carl. "Tooling through the trees - tool use by wild orangutans" Discover Magazine, November 1995.
  7. ^ Pradhan, Maria A. van Noordwijk1, Carel van Schaik1, 2012A model for the evolution of developmental arrest in male orangutans
  8. ^ "'World's oldest' orang-utan dies". BBC News. 31 December 2007. 
  9. ^ a b Singleton, I., S. Wich, S. Husson, S. Stephens, S. Utami Atmoko, M. Leighton, N. Rosen, K. Traylor-Holzer, R. Lacy, O. Byers (2004). "Orangutan Population and Habitat Viability Assessment". Final Report. IUCN/SSC Conservation Breeding Specialist Group (CSG). IUCN. 
  10. ^ Rijksen, H. D. (1978). "A Field Study on Sumatran Orang utans (Pongo pygmaeus abelli, Lesson 1827)". Ecology, Behavior and Conservation (Wageningen: Veenaman and Zonen). 
  11. ^ S. A. Wich; I. Singleton; S. S. Utami-Atmoko; M. L. Geurts; H. D. Rijksen; and C. P. van Schaik (2003). "The status of the Sumatran orang-utan Pongo abelii: an update". Flora & Fauna International 37 (1): 49. doi:10.1017/S0030605303000115. 
  12. ^ Mittermeier, R.A.; Wallis, J.; Rylands, A.B.; Ganzhorn, J.U.; Oates, J.F.; Supriatna, E.A.; Palacios, E.; Heymann, E.W.; Kierulff, M.C.M., eds. (2009). Primates in Peril: The World's 25 Most Endangered Primates 2008–2010 (PDF). Illustrated by S.D. Nash. Arlington, VA.: IUCN/SSC Primate Specialist Group (PSG), International Primatological Society (IPS), and Conservation International (CI). pp. 1–92. ISBN 978-1-934151-34-1. 
  13. ^ Sharshov, Alexander. "New Page 1". SB RAS Novobrisk. Institute of Cytology and Genetics. Retrieved 28 January 2011. 
  14. ^ a b c Singh, Ranjeet (26 January 2011). "Orang-utans join the genome gang". Nature. doi:10.1038/news.2011.50. Retrieved 2011-01-27. 
  15. ^ Spencer, Geoff (26 January 2011). "NIH-funded scientists publish orangutan genome sequence". National Institutes of Health News. U.S. Department of Health and Human Services. Retrieved 28 January 2011. 
  16. ^ Cohen, Jon (26 January 2011). "Orangutan Genome Full of Surprises". Science Now. American Association for the Advancement of Science. Retrieved 28 January 2011. 

External links[edit]

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