Sumatran elephant

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Sumatran elephant
Elephant Sumatra ProfilG.jpg
Male Sumatran elephant in Aceh Province
Bayi gajah Sumatera di Taman Nasional Tesso Nilo.jpg
Cow and calf at Tesso Nilo National Park
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Proboscidea
Family: Elephantidae
Genus: Elephas
Species:
E. maximus
Subspecies:
E. m. sumatranus [2]
Trinomial name
Elephas maximus sumatranus [2]
Temminck, 1847

The Sumatran elephant (Elephas maximus sumatranus) is one of three recognized subspecies of the Asian elephant, and native to the Indonesian island of Sumatra. In 2011, IUCN upgraded the conservation status of the Sumatran elephant from endangered to critically endangered in its Red List as the population had declined by at least 80% during the past three generations, estimated to be about 75 years. The subspecies is preeminently threatened by habitat loss, degradation and fragmentation, and poaching; over 69% of potential elephant habitat has been lost within the last 25 years. Much of the remaining forest cover is in blocks smaller than 250 km2 (97 sq mi), which are too small to contain viable elephant populations. [1]

Contents

Characteristics

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. Females are usually smaller than males, and have short or no tusks. [3]

Sumatran elephants reach a shoulder height of between 2 and 3.2 m (6.6 and 10.5 ft), weigh between 2,000 and 4,000 kg (4,400 and 8,800 lb), and have 20 pairs of ribs. Their skin colour is lighter than of the Sri Lankan elephant and the Indian elephant even with the least depigmentation. [4]

Distribution and habitat

The Sumatran elephant was once widespread on the island, with the Riau Province believed to have the largest elephant population in Sumatra with over 1,600 individuals in the 1980s. [1] In 1985, an island-wide rapid survey suggested that between 2,800 and 4,800 elephants lived in all eight mainland provinces of Sumatra in 44 populations. Twelve of these populations occurred in Lampung Province, where only three populations were extant in 2002 according to surveys carried out between September 2000 and March 2002. The population in Bukit Barisan Selatan National Park was estimated at 498 individuals, while the population in Way Kambas National Park was estimated at 180 individuals. The third population in Gunung Rindingan–Way Waya complex was considered to be too small to be viable over the long-term. [5]

By 2008, elephants had become locally extinct in 23 of the 43 ranges identified in Sumatra in 1985, indicating a very significant decline of the Sumatran elephant population up to that time. By 2008, the elephant was locally extinct in West Sumatra Province and at risk of being lost from North Sumatra Province too. In Riau Province only about 350 elephants survived across nine separate ranges. [1]

As of 2007, the population of Sumatran elephants is estimated to be 2,400–2,800 wild individuals, excluding elephants in camps, in 25 fragmented populations across the island. More than 85% of their habitat is outside of protected areas. [6]

In Aceh, radio-collared Sumatran elephant clans preferred areas in dense natural forests in river and mountain valleys at elevation below 200 m (660 ft); from there, they moved into heterogenous forests and foraged near human settlements mainly by night. [7]

Ecology and behaviour

Female elephants stop reproducing after 60 years of age.[ citation needed ] The maximum longevity in the wild is around 60 years. Female captive elephants have survived until 75 years while males have survived 60 years. [8] They give birth mostly at night, which lasts about 10 seconds. A healthy calf is usually able to stand up on its own after 30 minutes. [9]

Female elephants hit their growth plateau at a younger age and develop faster than male elephants, while male elephants grow to larger size and continue to grow as they age. [10]

Threats

Due to conversion of forests into human settlements, agricultural areas and plantations, many of the Sumatran elephant populations have lost their habitat to humans. As a result, many elephants have been removed from the wild or directly killed. [11] Between 1980 and 2005, 69% of potential Sumatran elephant habitat was lost within just one elephant generation. [5]

Most of the elephants found in Sumatran camps were captured after crop-raiding in protected areas. The reduction of the elephants' habitat for illegal conversion of agriculture and palm oil plantations still continues. [12] Between 2012 and 2015, 36 elephants were found dead in Aceh Province due to electrocution, poisoning, and traps. Most dead elephants were found near palm oil plantations, which elephants often attempt to destroy (sometimes successfully) as impediments to their foraging. [13] [14]

Sumatran elephants prefer areas of low elevation and gentler slopes, including those along the river and mountain valleys; humans also prefer these same features, which results in competition between elephants and humans for the same space. Crop protection efforts, which mainly consist of trying to chase elephants out of crop fields or moving them deeper into the forest away from farms, has restricted access for some elephants to these areas. [7]

Conservation

Sumatran elephants performing in a show at Taman Safari, Bogor Three elephants in a show in Taman Safari, Bogor, Indonesia.jpg
Sumatran elephants performing in a show at Taman Safari, Bogor

Elephas maximus is listed on CITES Appendix I. Sumatran elephants are protected under Indonesian law. [1]

In 2004, the Tesso Nilo National Park has been established in Riau Province to protect the Sumatran elephant's habitat. This forest is one of the last areas large enough to support a viable population of elephants. [15]

Between 1986 and 1995, 520 wild elephants were captured and kept in six Elephant Training Centres, which have been established since 1986 in the provinces of Lampung, Aceh, Bengkulu, North and South Sumatra, and Riau. Capturing wild elephants was stopped in 1999, since the maintenance of captive elephants was too expensive, their management had not become self-financing and because some of the centres were overcrowded. By the end of 2000, 391 elephants were kept in the centres, and a few more in zoos, safari parks and tourist areas. [16]

See also

Related Research Articles

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<span class="mw-page-title-main">Sumatra</span> Island in western Indonesia

Sumatra is one of the Sunda Islands of western Indonesia. It is the largest island that is fully within Indonesian territory, as well as the sixth-largest island in the world at 475,807.63 km2 (182,812 mi.2), including adjacent islands such as the Simeulue, Nias, Mentawai, Enggano, Riau Islands, Bangka Belitung and Krakatoa archipelago.

<span class="mw-page-title-main">Asian elephant</span> Second largest elephant species

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<span class="mw-page-title-main">Lampung</span> Province of Indonesia

Lampung, officially the Province of Lampung, is a province of Indonesia. It is located on the southern tip of the island of Sumatra. It has a short border with the province of Bengkulu to the northwest, and a longer border with the province of South Sumatra to the north, as well a maritime border with the province of Banten and Jakarta to the east. It is the original home of the Lampung people, who speak their own language, and possess their own written script. Its capital is Bandar Lampung.

<span class="mw-page-title-main">Sumatran tiger</span> Tiger subspecies endemic to Sumatra

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<span class="mw-page-title-main">Tesso Nilo National Park</span> National park in Riau Province, Sumatra, Indonesia

Tesso Nilo National Park is a national park in Riau Province, Sumatra, Indonesia. It was declared a national park by the Indonesian government in 2004. The original area of the park was 385.76 km2, but the decision has been made to expand it to 1000 km2. Tesso Nilo National Park houses some of the largest coherent lowland rainforests remaining on Sumatra. The Center for Biodiversity Management has surveyed over 1,800 plots in tropical forests around the world. They found that no other plot has as many vascular plants as in Tesso Nilo. Indonesian Institute of Sciences (LIPI) surveyed forests throughout Sumatra, and also found that Tesso Nilo housed by far the most species.

<span class="mw-page-title-main">Gunung Leuser National Park</span> National park in Sumatra, Indonesia

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<span class="mw-page-title-main">Way Kambas National Park</span> National park in Sumatra, Indonesia

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<span class="mw-page-title-main">Indian elephant</span> Most widespread subspecies of Asian elephant

The Indian elephant is one of three extant recognized subspecies of the Asian elephant, native to mainland Asia. The species is smaller than the African elephant species with a convex back and the highest body point on its head. The species exhibits significant sexual dimorphism with a male reaching an average shoulder height of about 3.2 m (10 ft) and weighing up to 5,400 kg (11,900 lb) whereas a female reaches an average shoulder height of about 2.54 m (8.3 ft) and weighs up to 4,160 kg (9,170 lb). It has a broader skull with a concave forehead, two large laterally folded ears and a large trunk. It has grey colored smooth skin with four large legs and a long tail.

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<span class="mw-page-title-main">Leuser Ecosystem</span>

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References

  1. 1 2 3 4 5 Williams, C.; Tiwari, S.K.; Goswami, V.R.; de Silva, S.; Kumar, A.; Baskaran, N.; Yoganand, K. & Menon, V. (2020). "Elephas maximus". IUCN Red List of Threatened Species . 2020: e.T7140A45818198. doi: 10.2305/IUCN.UK.2020-3.RLTS.T7140A45818198.en . Retrieved 3 April 2023.
  2. 1 2 Shoshani, J. (2005). "Subspecies Elephas maximus sumatranus". In Wilson, D.E.; Reeder, D.M (eds.). Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Johns Hopkins University Press. p. 90. ISBN   978-0-8018-8221-0. OCLC   62265494.
  3. ↑ Shoshani, J., Eisenberg, J.F. (1982) Elephas maximus. Archived 2006-08-30 at the Wayback Machine Mammalian Species 182: 1–8
  4. ↑ Shoshani, J. (2006) Taxonomy, Classification, and Evolution of Elephants In: Fowler, M. E., Mikota, S. K. (eds.) Biology, medicine, and surgery of elephants. Wiley-Blackwell. ISBN   0813806763. Pp. 3–14
  5. 1 2 Hedges, S.; Tyson, M. J.; Sitompul, A. F.; Kinnaird, M. F.; Gunaryadi, D. & Aslan (2005). "Distribution, status, and conservation needs of Asian elephants (Elephas maximus) in Lampung Province, Sumatra, Indonesia" (PDF). Biological Conservation. 124 (1): 35–48. Bibcode:2005BCons.124...35H. doi:10.1016/j.biocon.2005.01.004.
  6. ↑ Soehartono, T., Susilo, H. D., Sitompul, A. F., Gunaryadi, D., Purastuti, E. M., Azmi, W., Fadhli, N., and Stremme, C. (2007). The strategic and action plan for Sumatran and Kalimantan elephant. Departemen Kehutanan, Jakarta.
  7. 1 2 Wilson, G.; Gray, R.J.; Radinal, R.; Hasanuddin, H.; Azmi, W.; Sayuti, A.; Muhammad, H.; Abdullah, A.; Nazamuddin, B.S.; Sofyan, H.; Riddle, H.S.; Stremme, C. & Desai, A.A.. (2021). "Between a rock and a hard place: rugged terrain features and human disturbance affect behaviour and habitat use of Sumatran elephants in Aceh, Sumatra, Indonesia". Biodiversity and Conservation. 30 (3): 597–618. Bibcode:2021BiCon..30..597W. doi:10.1007/s10531-020-02105-3. S2CID   234345462.
  8. ↑ Sukumar, R. & Santiapillai, C. (1993). "Asian elephant in Sumatra population and habitat viability analysis" (PDF). Gajah, Journal of the Asian Elephant Specialist Group (11): 61.
  9. ↑ Puttipong, K., Clarke, B. (2002). Giants On Our Hands. Proceedings of the International Workshop on the Domesticated Asian Elephant 30: 253–254.
  10. ↑ Reilly, J. (2002). "Growth in the Sumatran elephant (Elephas maximus sumatranus) and age estimation based on dung diameter". Journal of Zoology. 258 (2): 205–213. doi:10.1017/S0952836902001322.
  11. ↑ "Land clearance drives Sumatran elephants closer to extinction". DW.COM. 2012-01-24. Retrieved 2019-10-05.
  12. ↑ Hedges, S., Tyson, M.J., Sitompul, A.F., Hammatt, H. (2006). Why Inter-country Loans Will Not Help Sumatra’s Elephants. Zoo Biology 25: 235–246.
  13. ↑ Erwin Z. (2015). "Ten Percent of Sumatran Elephant Killed in Three Years".
  14. ↑ Elephant Welfare: the Palm Oil problem, wildwelfare.org. Accessed 7 February 2024.
  15. ↑ WWF International - Sumatran elephant species profile, retrieved 7 November 2010
  16. ↑ Suprayogi, B., Sugardjito, J. and R. P. H. Lilley (2002). Management of Sumatran elephants in Indonesia: Problems and challenges. Pages 183–194 in: Baker, I.and M. Kashio (eds.) Giants on our Hands. Proceedings of the International Workshop on the Domesticated Asian Elephant. FAO Regional Office for Asia and the Pacific, Bangkok.