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Borneo elephant

January 01, 1970

The Borneo elephant, also called the Bornean elephant or the Borneo pygmy elephant, is a subspecies of Asian elephant (Elephas maximus) that inhabits northeastern Borneo, in Indonesia and Malaysia. Its origin remains the subject of debate. A definitive subspecific classification as Elephas maximus borneensis awaits a detailed range-wide morphometric and genetic study. Since 1986, the Asian elephant has been listed as Endangered on the IUCN Red List as the population has declined by at least 50% over the last three generations, estimated to be 60–75 years. It is pre-eminently threatened by loss, degradation and fragmentation of habitat.[1]

Borneo elephant
Scientific classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Proboscidea
Family: Elephantidae
Genus: Elephas
Species:
E. maximus
Subspecies:
E. m. borneensis
Trinomial name
Elephas maximus borneensis

The Sultan of Sulu was thought to have introduced captive elephants to Borneo in the 18th century, which were released into the jungle.[2] Comparison of the Borneo elephant population to putative source populations in DNA analysis indicates that the Borneo elephants more likely derived from Sundaic stock and are indigenous to Borneo, rather than having been introduced by humans. The genetic divergence of Borneo elephants warrants their recognition as a separate evolutionarily significant unit.[3]

Characteristics edit

 
A close-up of the face of an elephant near Kinabatangan River, Sukau, Sabah, Malaysia

In general, Asian elephants are smaller than African elephants and have the highest body point on the head. The tip of their trunk has one finger-like process. Their back is convex or level.[4]

It has become commonplace to refer to the Borneo elephant as a 'pygmy' subspecies, although adult elephants of Sabah of both genders are similar in height to their counterparts in Peninsular Malaysia. Five measurements of the skull of a fully adult female elephant from Gomantong Forest Reserve were slightly smaller (72–90%) than comparable dimensions averaged for two Sumatran skulls. Few available measurements show that they are of similar size to other populations of the Sunda subregion.[2]

Morphological measurements of fifteen captive elephants from Peninsular Malaysia and of six elephants from Sabah were taken between April 2005 and January 2006, and repeated three times for each elephant and averaged. There was no significant difference in any of the characters between the two captive populations.[5]

They are also remarkably tame and passive, another reason some scientists think they descended from a domestic collection.[3][6]

Distribution and habitat edit

 
A female elephant with her calf near the Kinabatangan River

Elephants are confined to the northern and northeastern parts of Borneo.[7] In the 1980s, there were two distinct populations: One lived in Sabah, ranging over the Tabin Wildlife Reserve and adjacent mostly logged dipterocarp forest on steep terrain; the other inhabited the hilly interior at about 300 to 1,500 m (980 to 4,920 ft) altitude in dipterocarp forest, which was largely undisturbed at the time and only logged at its periphery. In Kalimantan, their range is restricted to a small contiguous area of the upper Sembakung River in the east.[8]

The range of wild elephants in Sabah and Kalimantan seems to have expanded very little in the past 100 years despite access to suitable habitat elsewhere on Borneo. Borneo's soil tends to be young, leached, and infertile, and there is speculation that the distribution of wild elephants on the island may be limited by the occurrence of natural mineral sources.[9]

In 1992, the estimated elephant population size in Sabah ranged from 500 to 2,000 individuals, based on survey work conducted in the Tabin Wildlife Reserve, in Lower Kinabatangan District and in the Deramakot Forest Reserve. An elephant population census was conducted in Sabah between July 2007 and December 2008, counting dung piles along 216 line transects in five main elephant managed ranges, covering a total distance of 186.12 km (115.65 mi). Results of this survey suggest an elephant population of 1,184–3,652 individuals inhabiting the ranges of Tabin, Lower Kinabatangan, North Kinabatangan, Ulu Kalumpang Forest Reserve and the central forest of Sabah. The elephant density and population size varied throughout the five key ranges affected by (i) conversion of lowland forest, (ii) fragmentation of habitat, and (iii) existing land use activities such as logging. The upper catchment of Ulu Segama Forest Reserve had the highest density of elephants with 3.69 elephants per 1 km2 (0.39 sq mi). Only the unprotected central forest area supported an elephant population of more than 1,000 individuals.[10]

In 2005, five female elephants were fitted with tracking devices to study their home range and movement patterns in Sabah. Results suggest that elephant herds occupied a minimum home range from 250 to 400 km2 (97 to 154 sq mi) in non-fragmented forest, while in fragmented forest habitat, the annual home range for elephants is estimated to be around 600 km2 (230 sq mi).[11]

Threats edit

The pre-eminent threats to the Asian elephant today are habitat loss, degradation, and fragmentation, which are driven by an expanding human population, and lead in turn to increasing conflicts between humans and elephants when elephants eat or trample crops. Hundreds of people and elephants are killed annually as a result of such conflicts.[12]

Expanding human development disrupts their migration routes, depletes their food sources, and destroys their habitat.[13]

Another threat is insufficient forestation or a lack of trees due to logging. Borneo elephants need 100–225 litres (22–49 imp gal; 26–59 US gal) of water a day and if it is harder to find because of climatic conditions or cutting their resource of water, their only option is to migrate to where they can find that resource to survive.[14]

As of April 2012, an estimated 20–80 elephants range near 22 villages in the Sebuku subdistrict of Nunukan, North Kalimantan.[15]

Conservation edit

 
Herd

Elephas maximus is listed on CITES Appendix I.[1] The genetic distinctiveness of Borneo elephants makes them one of the highest priority populations for Asian elephant conservation.[3]

In Malaysia, the Borneo elephants are protected under schedule II of the Wildlife Conservation Enactment. Any person found guilty of hunting elephants is liable on conviction to a fine of $RM 50,000 or five years imprisonment or both.[9]

The Oregon Zoo in Portland has the only Borneo elephant in the United States, a rescued female by the name of Chendra. She was found wandering alone near a palm oil plantation. She had wounds on her front legs and her left eye from gunshots. She was ultimately left blind in that eye. Malaysian wildlife officials worked to find her a home, and she was brought to the Oregon Zoo on November 20, 1999.[16]

In 2016, a rescued Borneo elephant in a Japanese zoo caught tuberculosis. Although the elephant later recovered, conservationists still do not know how the elephant was infected. Research on the matter is ongoing.[17]

Taxonomic history edit

It has not been resolved whether Borneo elephants are indigenous or have descended from captive elephants presented to the Sultan of Sulu in 1750 by the East India Company and later set free in northern Borneo.[8]

In the 19th century, a zoological exploration established that wild elephants occurred naturally in a restricted region of northeastern Borneo. The status and taxonomic distinctiveness of the Borneo elephants has been controversial since then. In 1940, Frederick Nutter Chasen considered Bornean elephants as descendants of an introduced stock, and placed them in the subspecies Elephas maximus indicus. Reginald Innes Pocock having studied specimens in the British Museum of Natural History disagreed in 1943, and placed all Sundaic elephants in the subspecies Elephas maximus sumatrensis. In 1950, Paules Edward Pieris Deraniyagala described a subspecies Elephas maximus borneensis, taking as his type an illustration in the National Geographical Magazine.[2]

In 2003, the debate was re-opened by a suggestion that the introduced Sulu elephants and the northeastern Borneo population might have descended from the now-extinct Javan elephant, which was named Elephas maximus sondaicus by Deraniyagala. This hypothesis is based on missing archaeological evidence of long-term elephant habitation in Borneo, a corroboration in folklore and that elephants have not colonized the entire island of Borneo.[18]

In 2003, mitochondrial DNA analysis and microsatellite data indicated that the extant population is derived from Sundaic stock, but has undergone independent local evolution for some 300,000 years since a postulated Pleistocene colonization, and possibly became isolated from other Asian elephant populations when land bridges that linked Borneo with the other Sunda Islands and the Asian mainland disappeared after the Last Glacial Maximum 18,000 years ago.[3]

History edit

Elephants were appropriate gifts from one ruler to another, or to a person of high standing, and it was customary to transport them by sea. In about 1395, the Raja of Java gave two elephants to the ruler Raja Baginda of Sulu. These animals were reputedly the founders of a feral population at the western end of Borneo. When in 1521 the remnants of Ferdinand Magellan's circumnavigation of the Earth reached Brunei, the chronicler of the voyage recounted that the delegation from the flagship Victoria was conveyed to and from the ruler's palace on elephants caparisoned in silk. This custom had been discontinued by the time later visitors arrived in Brunei in the 1770s, who reported wild-living elephant herds that were hunted by local people after harvest. Despite the early records of royal elephants in Brunei and Banjarmasin, there was no tradition of capturing and taming local wild elephants in Borneo.[2]

The arrival of elephants in the northern Kalimantan region of Borneo coincides with the rule of the Sultans of Sulu over Sabah. The Sultanate of Sulu enjoyed peaceful ties with the Hindu Empire of Java. As a token of appreciation, the rulers of Java sent their elephants to Sulu, much as they had sent Javan elephants to the Sultanate of Maguindanao, which also partly gives the reason why skeletal remains of small elephants are found in Mindanao, south Philippines. The Sultan of Sulu and his family shipped some of their prized Javan elephants to northeast Borneo due to lack of land and for the elephants to help in hauling logs out of the forest to create fast and long ships. When this lease was signed, most of these timid and largely domesticated small elephants under the employ of Sulu's shipbuilders and traders were released into the forests so they could live deep inside the jungle away from any feuding sultan who might use them for war. This single act of releasing the pachyderms to the wild made the Bolkiah family of Sulu and their allies the savior of what remaining elephants are left, old locals attest.[19]

In a study, they compared DNA and diversity to Asian elephant populations, and later came to the conclusion that Borneo elephants split from other Elepha subspecies about 300,000 years ago. They confirmed that Borneo elephants have low genetic diversity but followed a Pleistocene colonization.[20]

See also edit

References edit

  1. ^ a b Choudhury, A.; Lahiri Choudhury, D.K.; Desai, A.; Duckworth, J.W.; Easa, P.S.; Johnsingh, A.J.T.; Fernando, P.; Hedges, S.; Gunawardena, M. & Kurt, F. (2008). "Elephas maximus". IUCN Red List of Threatened Species. 2008: e.T7140A12828813.
  2. ^ a b c d Cranbrook, E.; Payne, J.; Leh, C.M.U. (2008). "Origin of the elephants Elephas maximus L. of Borneo" (PDF). Sarawak Museum Journal.
  3. ^ a b c d Fernando P.; Vidya T.N.C.; Payne J.; Stuewe M.; Davison G. Alfred, R.J.; Andau, P. Bosi; E. Kilbourn; A. Melnick, D.J. (2003). "DNA Analysis Indicates That Asian Elephants Are Native to Borneo and Are Therefore a High Priority for Conservation". PLOS Biol. 1 (1): e6. doi:10.1371/journal.pbio.0000006. PMC 176546. PMID 12929206.
  4. ^ Shoshani, J.; Eisenberg, J.F. (1982). (PDF). Mammalian Species (182): 1–8. doi:10.2307/3504045. JSTOR 3504045. Archived from the original (PDF) on 30 August 2006.
  5. ^ Nurzhafarina, O.; Maryati, M.; Ahmad, A.H.; Nathan, S.; Pierson, H.T.; Goosens, B. (2008). (PDF). Journal of Tropical Biology and Conservation. 4 (1): 109–113. Archived from the original (PDF) on 7 March 2012.
  6. ^ "New elephant subspecies discovered". WWF News. 2003.
  7. ^ Medway, L. (1977). Mammals of Borneo: Field keys and an annotated checklist. Monographs of the Malaysian Branch of the R.A.S. Kuala Lumpur, Malaysia: Royal Asiatic Society.
  8. ^ a b Sukumar, R. (1993). The Asian Elephant: Ecology and Management (Second ed.). Cambridge University Press. ISBN 052143758X – via Google Books.
  9. ^ a b Ambu, L.N.; Andua. P.M.; Nathan, S.; Tuuga, A.; Jensen, S.M.; Cox, R.; Alfred, R.; Payne, J. (2002). (PDF). Archived from the original (PDF) on 22 July 2011.. Sabah Wildlife Department
  10. ^ Alfred, R.; Ahmad, A. H.; Payne, J.; William, C.; Ambu, L. (2010). "Density and population estimation of the Bornean elephants (Elephas maximus borneensis) in Sabah" (PDF). Online Journal of Biological Sciences. 10 (2): 92–102. doi:10.3844/ojbsci.2010.92.102.
  11. ^ Alfred, R.; Ahmad, A.H.; Payne, J.; Williams, C.; Ambu, L. N.; How, P. M.; Goossens, B. (2012). "Home Range and Ranging Behaviour of Bornean Elephant (Elephas maximus borneensis) Females". PLOS ONE. 7 (2): e31400. Bibcode:2012PLoSO...731400A. doi:10.1371/journal.pone.0031400. PMC 3275559. PMID 22347469.
  12. ^ Leimgruber, P.; Gagnon, J.B.; Wemmer, C.M.; Kelly, D.S.; Songer, M.A.; Selig, E.R. (2003). "Fragmentation of Asia's remaining wildlands: Implications for Asian elephant conservation". Animal Conservation. 6 (4): 347–359. Bibcode:2003AnCon...6..347L. doi:10.1017/S1367943003003421. S2CID 26206968.
  13. ^ Fernando P.; Vidya T. N. C.; Payne J.; Stuewe M.; Davison G.; et al. (2003). "Borneo Elephants: A High Priority for Conservation". PLOS Biology. 1 (1): e7. doi:10.1371/journal.pbio.0000007. PMC 176547.
  14. ^ Alfred, R., Ahmad, A. H., Payne, J., Williams, C., Ambu, L. N., How, P. M., & Goossens, B. (2012). Home range and ranging behaviour of Bornean elephant (Elephas maximus borneensis) females. PLOS ONE, 7(2), e31400–e31400
  15. ^ "Kalimantan elephant population continues to dwindle, says official". Antara News. April 2012. Retrieved February 7, 2024.
  16. ^ Lee, Stephanie (1970-01-01). "Borneo pygmy elephant in Oregon Zoo expecting a calf". The Star Online. Retrieved 2019-10-19.
  17. ^ Suga, S., Mukai, Y., Ishikawa, S., Yoshida, S., Paudel, S., & Wada, T. (2021). INTENSIVE TREATMENT OF A CAPTIVE BORNEAN ELEPHANT (ELEPHAS MAXIMUS BORNEENSIS) INFECTED WITH MYCOBACTERIUM CAPRAE IN JAPAN. Journal of Zoo and Wildlife Medicine, 51(4), 1062–1066. https://doi.org/10.1638/2019-0152
  18. ^ Shim, P.S. (2003). "Another look at the Borneo elephant". Sabah Society Journal. 20: 7–14.
  19. ^ "Pygmy elephant may have been introduced to Borneo from Java". The Star Online. 1970-01-01. Retrieved 2019-10-19.
  20. ^ Ishige, T., Miya, M., Ushio, M., Sado, T., Ushioda, M., Maebashi, K., Yonechi, R., Lagan, P., & Matsubayashi, H. (2017). Tropical-forest mammals as detected by environmental DNA at natural saltlicks in Borneo. Biological Conservation, 210, 281–285. https://doi.org/10.1016/j.biocon.2017.04.023

External links edit

  • WWF: Borneo elephant
  • eurekalert April 2008: 'Extinct' elephant may have been found again -- on a different island

January 01, 1970
borneo, elephant, also, called, bornean, elephant, borneo, pygmy, elephant, subspecies, asian, elephant, elephas, maximus, that, inhabits, northeastern, borneo, indonesia, malaysia, origin, remains, subject, debate, definitive, subspecific, classification, ele. The Borneo elephant also called the Bornean elephant or the Borneo pygmy elephant is a subspecies of Asian elephant Elephas maximus that inhabits northeastern Borneo in Indonesia and Malaysia Its origin remains the subject of debate A definitive subspecific classification as Elephas maximus borneensis awaits a detailed range wide morphometric and genetic study Since 1986 the Asian elephant has been listed as Endangered on the IUCN Red List as the population has declined by at least 50 over the last three generations estimated to be 60 75 years It is pre eminently threatened by loss degradation and fragmentation of habitat 1 Borneo elephant Scientific classification Domain Eukaryota Kingdom Animalia Phylum Chordata Class Mammalia Order Proboscidea Family Elephantidae Genus Elephas Species E maximus Subspecies E m borneensis Trinomial name Elephas maximus borneensisDeraniyagala 1950 The Sultan of Sulu was thought to have introduced captive elephants to Borneo in the 18th century which were released into the jungle 2 Comparison of the Borneo elephant population to putative source populations in DNA analysis indicates that the Borneo elephants more likely derived from Sundaic stock and are indigenous to Borneo rather than having been introduced by humans The genetic divergence of Borneo elephants warrants their recognition as a separate evolutionarily significant unit 3 Contents 1 Characteristics 2 Distribution and habitat 3 Threats 4 Conservation 5 Taxonomic history 6 History 7 See also 8 References 9 External linksCharacteristics edit nbsp A close up of the face of an elephant near Kinabatangan River Sukau Sabah Malaysia In general Asian elephants are smaller than African elephants and have the highest body point on the head The tip of their trunk has one finger like process Their back is convex or level 4 It has become commonplace to refer to the Borneo elephant as a pygmy subspecies although adult elephants of Sabah of both genders are similar in height to their counterparts in Peninsular Malaysia Five measurements of the skull of a fully adult female elephant from Gomantong Forest Reserve were slightly smaller 72 90 than comparable dimensions averaged for two Sumatran skulls Few available measurements show that they are of similar size to other populations of the Sunda subregion 2 Morphological measurements of fifteen captive elephants from Peninsular Malaysia and of six elephants from Sabah were taken between April 2005 and January 2006 and repeated three times for each elephant and averaged There was no significant difference in any of the characters between the two captive populations 5 They are also remarkably tame and passive another reason some scientists think they descended from a domestic collection 3 6 Distribution and habitat edit nbsp A female elephant with her calf near the Kinabatangan River Elephants are confined to the northern and northeastern parts of Borneo 7 In the 1980s there were two distinct populations One lived in Sabah ranging over the Tabin Wildlife Reserve and adjacent mostly logged dipterocarp forest on steep terrain the other inhabited the hilly interior at about 300 to 1 500 m 980 to 4 920 ft altitude in dipterocarp forest which was largely undisturbed at the time and only logged at its periphery In Kalimantan their range is restricted to a small contiguous area of the upper Sembakung River in the east 8 The range of wild elephants in Sabah and Kalimantan seems to have expanded very little in the past 100 years despite access to suitable habitat elsewhere on Borneo Borneo s soil tends to be young leached and infertile and there is speculation that the distribution of wild elephants on the island may be limited by the occurrence of natural mineral sources 9 In 1992 the estimated elephant population size in Sabah ranged from 500 to 2 000 individuals based on survey work conducted in the Tabin Wildlife Reserve in Lower Kinabatangan District and in the Deramakot Forest Reserve An elephant population census was conducted in Sabah between July 2007 and December 2008 counting dung piles along 216 line transects in five main elephant managed ranges covering a total distance of 186 12 km 115 65 mi Results of this survey suggest an elephant population of 1 184 3 652 individuals inhabiting the ranges of Tabin Lower Kinabatangan North Kinabatangan Ulu Kalumpang Forest Reserve and the central forest of Sabah The elephant density and population size varied throughout the five key ranges affected by i conversion of lowland forest ii fragmentation of habitat and iii existing land use activities such as logging The upper catchment of Ulu Segama Forest Reserve had the highest density of elephants with 3 69 elephants per 1 km2 0 39 sq mi Only the unprotected central forest area supported an elephant population of more than 1 000 individuals 10 In 2005 five female elephants were fitted with tracking devices to study their home range and movement patterns in Sabah Results suggest that elephant herds occupied a minimum home range from 250 to 400 km2 97 to 154 sq mi in non fragmented forest while in fragmented forest habitat the annual home range for elephants is estimated to be around 600 km2 230 sq mi 11 Threats editThe pre eminent threats to the Asian elephant today are habitat loss degradation and fragmentation which are driven by an expanding human population and lead in turn to increasing conflicts between humans and elephants when elephants eat or trample crops Hundreds of people and elephants are killed annually as a result of such conflicts 12 Expanding human development disrupts their migration routes depletes their food sources and destroys their habitat 13 Another threat is insufficient forestation or a lack of trees due to logging Borneo elephants need 100 225 litres 22 49 imp gal 26 59 US gal of water a day and if it is harder to find because of climatic conditions or cutting their resource of water their only option is to migrate to where they can find that resource to survive 14 As of April 2012 an estimated 20 80 elephants range near 22 villages in the Sebuku subdistrict of Nunukan North Kalimantan 15 Conservation edit nbsp Herd Elephas maximus is listed on CITES Appendix I 1 The genetic distinctiveness of Borneo elephants makes them one of the highest priority populations for Asian elephant conservation 3 In Malaysia the Borneo elephants are protected under schedule II of the Wildlife Conservation Enactment Any person found guilty of hunting elephants is liable on conviction to a fine of RM 50 000 or five years imprisonment or both 9 The Oregon Zoo in Portland has the only Borneo elephant in the United States a rescued female by the name of Chendra She was found wandering alone near a palm oil plantation She had wounds on her front legs and her left eye from gunshots She was ultimately left blind in that eye Malaysian wildlife officials worked to find her a home and she was brought to the Oregon Zoo on November 20 1999 16 In 2016 a rescued Borneo elephant in a Japanese zoo caught tuberculosis Although the elephant later recovered conservationists still do not know how the elephant was infected Research on the matter is ongoing 17 Taxonomic history editIt has not been resolved whether Borneo elephants are indigenous or have descended from captive elephants presented to the Sultan of Sulu in 1750 by the East India Company and later set free in northern Borneo 8 In the 19th century a zoological exploration established that wild elephants occurred naturally in a restricted region of northeastern Borneo The status and taxonomic distinctiveness of the Borneo elephants has been controversial since then In 1940 Frederick Nutter Chasen considered Bornean elephants as descendants of an introduced stock and placed them in the subspecies Elephas maximus indicus Reginald Innes Pocock having studied specimens in the British Museum of Natural History disagreed in 1943 and placed all Sundaic elephants in the subspecies Elephas maximus sumatrensis In 1950 Paules Edward Pieris Deraniyagala described a subspecies Elephas maximus borneensis taking as his type an illustration in the National Geographical Magazine 2 In 2003 the debate was re opened by a suggestion that the introduced Sulu elephants and the northeastern Borneo population might have descended from the now extinct Javan elephant which was named Elephas maximus sondaicus by Deraniyagala This hypothesis is based on missing archaeological evidence of long term elephant habitation in Borneo a corroboration in folklore and that elephants have not colonized the entire island of Borneo 18 In 2003 mitochondrial DNA analysis and microsatellite data indicated that the extant population is derived from Sundaic stock but has undergone independent local evolution for some 300 000 years since a postulated Pleistocene colonization and possibly became isolated from other Asian elephant populations when land bridges that linked Borneo with the other Sunda Islands and the Asian mainland disappeared after the Last Glacial Maximum 18 000 years ago 3 History editElephants were appropriate gifts from one ruler to another or to a person of high standing and it was customary to transport them by sea In about 1395 the Raja of Java gave two elephants to the ruler Raja Baginda of Sulu These animals were reputedly the founders of a feral population at the western end of Borneo When in 1521 the remnants of Ferdinand Magellan s circumnavigation of the Earth reached Brunei the chronicler of the voyage recounted that the delegation from the flagship Victoria was conveyed to and from the ruler s palace on elephants caparisoned in silk This custom had been discontinued by the time later visitors arrived in Brunei in the 1770s who reported wild living elephant herds that were hunted by local people after harvest Despite the early records of royal elephants in Brunei and Banjarmasin there was no tradition of capturing and taming local wild elephants in Borneo 2 The arrival of elephants in the northern Kalimantan region of Borneo coincides with the rule of the Sultans of Sulu over Sabah The Sultanate of Sulu enjoyed peaceful ties with the Hindu Empire of Java As a token of appreciation the rulers of Java sent their elephants to Sulu much as they had sent Javan elephants to the Sultanate of Maguindanao which also partly gives the reason why skeletal remains of small elephants are found in Mindanao south Philippines The Sultan of Sulu and his family shipped some of their prized Javan elephants to northeast Borneo due to lack of land and for the elephants to help in hauling logs out of the forest to create fast and long ships When this lease was signed most of these timid and largely domesticated small elephants under the employ of Sulu s shipbuilders and traders were released into the forests so they could live deep inside the jungle away from any feuding sultan who might use them for war This single act of releasing the pachyderms to the wild made the Bolkiah family of Sulu and their allies the savior of what remaining elephants are left old locals attest 19 In a study they compared DNA and diversity to Asian elephant populations and later came to the conclusion that Borneo elephants split from other Elepha subspecies about 300 000 years ago They confirmed that Borneo elephants have low genetic diversity but followed a Pleistocene colonization 20 See also editDwarf elephant Insular dwarfism KallanaReferences edit a b Choudhury A Lahiri Choudhury D K Desai A Duckworth J W Easa P S Johnsingh A J T Fernando P Hedges S Gunawardena M amp Kurt F 2008 Elephas maximus IUCN Red List of Threatened Species 2008 e T7140A12828813 a b c d Cranbrook E Payne J Leh C M U 2008 Origin of the elephants Elephas maximus L of Borneo PDF Sarawak Museum Journal a b c d Fernando P Vidya T N C Payne J Stuewe M Davison G Alfred R J Andau P Bosi E Kilbourn A Melnick D J 2003 DNA Analysis Indicates That Asian Elephants Are Native to Borneo and Are Therefore a High Priority for Conservation PLOS Biol 1 1 e6 doi 10 1371 journal pbio 0000006 PMC 176546 PMID 12929206 Shoshani J Eisenberg J F 1982 Elephas maximus PDF Mammalian Species 182 1 8 doi 10 2307 3504045 JSTOR 3504045 Archived from the original PDF on 30 August 2006 Nurzhafarina O Maryati M Ahmad A H Nathan S Pierson H T Goosens B 2008 A preliminary study on the morphometrics of the Bornean Elephant PDF Journal of Tropical Biology and Conservation 4 1 109 113 Archived from the original PDF on 7 March 2012 New elephant subspecies discovered WWF News 2003 Medway L 1977 Mammals of Borneo Field keys and an annotated checklist Monographs of the Malaysian Branch of the R A S Kuala Lumpur Malaysia Royal Asiatic Society a b Sukumar R 1993 The Asian Elephant Ecology and Management Second ed Cambridge University Press ISBN 052143758X via Google Books a b Ambu L N Andua P M Nathan S Tuuga A Jensen S M Cox R Alfred R Payne J 2002 Asian Elephant Action Plan Sabah Malaysia PDF Archived from the original PDF on 22 July 2011 Sabah Wildlife Department Alfred R Ahmad A H Payne J William C Ambu L 2010 Density and population estimation of the Bornean elephants Elephas maximus borneensis in Sabah PDF Online Journal of Biological Sciences 10 2 92 102 doi 10 3844 ojbsci 2010 92 102 Alfred R Ahmad A H Payne J Williams C Ambu L N How P M Goossens B 2012 Home Range and Ranging Behaviour of Bornean Elephant Elephas maximus borneensis Females PLOS ONE 7 2 e31400 Bibcode 2012PLoSO 731400A doi 10 1371 journal pone 0031400 PMC 3275559 PMID 22347469 Leimgruber P Gagnon J B Wemmer C M Kelly D S Songer M A Selig E R 2003 Fragmentation of Asia s remaining wildlands Implications for Asian elephant conservation Animal Conservation 6 4 347 359 Bibcode 2003AnCon 6 347L doi 10 1017 S1367943003003421 S2CID 26206968 Fernando P Vidya T N C Payne J Stuewe M Davison G et al 2003 Borneo Elephants A High Priority for Conservation PLOS Biology 1 1 e7 doi 10 1371 journal pbio 0000007 PMC 176547 Alfred R Ahmad A H Payne J Williams C Ambu L N How P M amp Goossens B 2012 Home range and ranging behaviour of Bornean elephant Elephas maximus borneensis females PLOS ONE 7 2 e31400 e31400 Kalimantan elephant population continues to dwindle says official Antara News April 2012 Retrieved February 7 2024 Lee Stephanie 1970 01 01 Borneo pygmy elephant in Oregon Zoo expecting a calf The Star Online Retrieved 2019 10 19 Suga S Mukai Y Ishikawa S Yoshida S Paudel S amp Wada T 2021 INTENSIVE TREATMENT OF A CAPTIVE BORNEAN ELEPHANT ELEPHAS MAXIMUS BORNEENSIS INFECTED WITH MYCOBACTERIUM CAPRAE IN JAPAN Journal of Zoo and Wildlife Medicine 51 4 1062 1066 https doi org 10 1638 2019 0152 Shim P S 2003 Another look at the Borneo elephant Sabah Society Journal 20 7 14 Pygmy elephant may have been introduced to Borneo from Java The Star Online 1970 01 01 Retrieved 2019 10 19 Ishige T Miya M Ushio M Sado T Ushioda M Maebashi K Yonechi R Lagan P amp Matsubayashi H 2017 Tropical forest mammals as detected by environmental DNA at natural saltlicks in Borneo Biological Conservation 210 281 285 https doi org 10 1016 j biocon 2017 04 023External links editWWF Borneo elephant eurekalert April 2008 Extinct elephant may have been found again on a different island Retrieved from https en wikipedia org w index php title Borneo elephant amp oldid 1223191755, wikipedia, wiki, book, books, library,

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