Wild water buffalo

The wild water buffalo (Bubalus arnee), also called Asian buffalo, Asiatic buffalo and wild Asian buffalo, is a large bovine native to the Indian subcontinent and Southeast Asia. It has been listed as Endangered in the IUCN Red List since 1986, as the remaining population totals less than 4,000. A population decline of at least 50% over the last three generations (24–30 years) is projected to continue.[1] The global population has been estimated at 3,400 individuals, of which 3,100 (91%) live in India, mostly in Assam.[2] The wild water buffalo is the probable ancestor of the domestic water buffalo.[3][4]

"Arnee" redirects here. For the band, see Arnee and the Terminaters. For the similar name, see Arnie.
This article is about the wild species. For the domestic species, see water buffalo.

Wild water buffalo
in Kaziranga National Park
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Family: Bovidae
Subfamily: Bovinae
Genus: Bubalus
Species:
B. arnee
Binomial name
Bubalus arnee
(Kerr, 1792)
Subspecies
  • B. a. arnee
  • B. a. fulvus
  • B. a. septentrionalis
  • B. a. migona
Wild water buffalo range

Taxonomy
Water buffalo sculpture, Lopburi, Thailand, 2300 BCE

Bos arnee was the scientific name proposed by Robert Kerr in 1792 who described a skull with horns of a buffalo zoological specimen from Bengal in northern India.[5] Bubalus arnee was proposed by Charles Hamilton Smith in 1827 who introduced the generic name Bubalus for bovids with large heads, convex-shaped narrow foreheads, laterally bent flat horns, funnel-shaped ears, small dewlaps and slender tails.[6] Later authors subordinated the wild water buffalo under either Bos, Bubalus or Buffelus.[7]

In 2003, the International Commission on Zoological Nomenclature placed Bubalus arnee on the Official List of Specific Names in Zoology, recognizing the validity of this name for a wild species.[8] Most authors have adopted the binomen Bubalus arnee for the wild water buffalo as valid for the taxon.[9]

Only a few DNA sequences are available from wild water buffalo populations.[10] Wild populations are considered to be the progenitor of the modern domestic water buffalo, but the genetic variation within the species is unclear, and also how it is related to the domesticated river and swamp buffaloes.[11]

Characteristics
Skull of a wild water buffalo in the Bavarian State Collection of Zoology

The wild water buffalo has an ash-gray to black skin. The moderately long, coarse and sparse hair is directed forward from the haunches to the long and narrow head. There is a tuft on the forehead, and the ears are comparatively small. Its head-to-body-length is 240 to 300 cm (94 to 118 in) with a 60 to 100 cm (24 to 39 in) long tail and a shoulder height of 150 to 190 cm (59 to 75 in). Both sexes carry horns that are heavy at the base and widely spreading up to 2 m (79 in) along the outer edges, exceeding in size the horns of any other living bovid. The tip of the tail is bushy; the hooves are large and splayed.[12] It is larger and heavier than the domestic water buffalo, and weighs from 600 to 1,200 kg (1,300 to 2,600 lb).[13][14] The average weight of three captive wild water buffaloes was 900 kg (2,000 lb).[15] It is among the heaviest living wild bovid species, and is slightly smaller than gaur and bisons.[16]

Distribution and habitat
A herd of wild water buffaloes in Kaziranga National Park, Assam

The wild water buffalo occurs in India, Nepal, Bhutan, Thailand, and Cambodia, with an unconfirmed population in Myanmar. It has been extirpated in Bangladesh, Laos, Vietnam, and Sri Lanka.[1][2] It is associated with wet grasslands, swamps and densely vegetated river valleys.[1]

In India, it is largely restricted to in and around Kaziranga, Manas and Dibru-Saikhowa National Parks, Laokhowa Wildlife Sanctuary and Bura Chapori Wildlife Sanctuary and in a few scattered pockets in Assam; and in and around D'Ering Memorial Wildlife Sanctuary in Arunachal Pradesh. A small population survives in Balphakram National Park in Meghalaya, and in Chhattisgarh in Indravati National Park and Udanti Wildlife Sanctuary.[2] This population might extend into adjacent parts of Odisha. In the early 1990s, there may still have been about 3,300–3,500 wild water buffaloes in Assam and the adjacent states of northeast India.[17] In 1997, the number was assessed at less than 1,500 mature individuals.[1]

Many surviving populations are thought to have interbred with feral or domestic water buffaloes. In the late 1980s, fewer than 100 wild water buffaloes were left in Madhya Pradesh.[18] By 1992, only 50 animals were estimated to have survived there.[17]

Nepal's only population lives in Koshi Tappu Wildlife Reserve and has grown from 63 individuals in 1976 to 219 individuals in 2009.[19] In spring 2016, the population was estimated at 433 individuals including 180 adult females and 114 adult males.[20] In 2016, 18 individuals were translocated from Koshi Tappu Wildlife Reserve to Chitwan National Park.[21]

In and around Bhutan's Royal Manas National Park, a small number of wild water buffaloes occur. This is part of the sub-population that occurs in India's Manas National Park.[2] In Myanmar, a few animals live in Hukaung Valley Wildlife Sanctuary.[1]

In Thailand, wild water buffaloes have been reported to occur in small herds of less than 40 individuals. A population of 25–60 individuals inhabited lowland areas of the Huai Kha Khaeng Wildlife Sanctuary between December 1999 and April 2001. This population has not grown significantly in 15 years, and is maybe interbreeding with domestic water buffaloes.[22]

The population in Cambodia is confined to a small area of easternmost Mondulkiri and possibly Ratanakiri Provinces. Only a few dozen individuals remain.[23]

The wild water buffaloes in Sri Lanka are thought to be descendants of the introduced domestic water buffalo. It is unlikely that any true wild water buffaloes remain there today.[1]

Wild-living populations found elsewhere in Asia, Australia, Argentina and Bolivia are feral domestic water buffaloes.[12]

Ecology and behavior

Wild water buffaloes are both diurnal and nocturnal. Adult females and their young form stable clans of as many as 30 individuals which have home ranges of 170 to 1,000 ha (0.66 to 3.86 sq mi), including areas for resting, grazing, wallowing, and drinking. Clans are led by old cows, even when bulls accompany the group. Several clans form a herd of 30 to 500 animals that gather at resting areas. Adult males form bachelor groups of up to 10 individuals, with older males often being solitary, and spend the dry season apart from the female clans. They are seasonal breeders in most of their range, typically in October and November. However, some populations breed year round. Dominant males mate with the females of a clan who subsequently drive them off. Their gestation period is 10 to 11 months, with an inter-birth interval of one year. They typically give birth to a single offspring, although twins are possible. Age at sexual maturity is 18 months for males, and three years for females. The maximum known lifespan is 25 years in the wild.[12] In the wild in Assam, the herd size varies from three to 30 individuals.[2]

They are probably grazers by preference, feeding mainly on graminoids when available, such as Bermuda grass, and Cyperus sedges, but they also eat other herbs, fruits, and bark, as well as browsing on trees and shrubs.[24] They also feed on crops, including rice, sugarcane, and jute, sometimes causing considerable damage.[25]

Tigers and crocodiles prey on adult wild water buffaloes, and Asian black bears have also been known to kill them.[26]

Threats

A population reduction by at least 50% over the last three generations seems likely given the severity of the threats, especially hybridization; this population trend is projected to continue into the future. The most important threats are:[1]

Conservation

Bubalus arnee is included in CITES Appendix III, and is legally protected in Bhutan, India, Nepal, and Thailand.[1]

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gollark: Sinthorion
gollark: I would never say "dope", apio.
gollark: ++magic py "\n".join(map(lambda x: x.name, ctx.message.guild.members))
gollark: ++magic py map(lambda x: x.name, ctx.message.guild.members)

References
  1. Kaul, R.; Williams, A.C.; Steinmetz, R.; Mishra, R. (2019). "Bubalus arnee". IUCN Red List of Threatened Species. 2019: e.T3129A46364616.
  2. Choudhury, A. (2010). The vanishing herds: the wild water buffalo. Gibbon Books, Rhino Foundation, CEPF & COA, Taiwan, Guwahati, India.
  3. Lau, C. H.; Drinkwater, R. D.; Yusoff, K.; Tan, S. G.; Hetzel, D. J. S.; Barker, J. S. F. (1998). "Genetic diversity of Asian water buffalo (Bubalus bubalis): mitochondrial DNA D-loop and cytochrome b sequence variation" (PDF). Animal Genetics. 29 (4): 253–264. doi:10.1046/j.1365-2052.1998.00309.x. PMID 9745663.
  4. Groves, C. P. (2006). "Domesticated and Commensal Mammals of Austronesia and Their Histories". In Bellwood, P.; Fox, J. J.; Tryon, D. (eds.). The Austranesians. Canberra: Research School of Pacific Studies, The Australian National University. pp. 161–176.
  5. Kerr, R. (1792). "Arnee Bos arnee". The Animal Kingdom or zoological system of the celebrated Sir Charles Linnaeus. Class I. Mammalia. Edinburgh & London: A. Strahan & T. Cadell. p. 336.
  6. Smith, C. H. (1827). "Sub-genus I. Bubalus". In Griffith, E. (ed.). The animal kingdom arranged in conformity with its organization. Volume 5. Class Mammalia. London: Geo. B. Whittaker. pp. 371–373.
  7. Ellerman, J. R., Morrison-Scott, T. C. S. (1966). Checklist of Palaearctic and Indian mammals 1758 to 1946. Second edition. London: British Museum of Natural History. Pp 383–384.
  8. International Commission on Zoological Nomenclature (2003). "Opinion 2027 (Case 3010). Usage of 17 specific names based on wild species which are pre-dated by or contemporary with those based on domestic animals (Lepidoptera, Osteichthyes, Mammalia)". The Bulletin of Zoological Nomenclature. 60 (1): 81–84.
  9. Gentry, A.; Clutton-Brock, J.; Groves, C. P. (2004). "The naming of wild animal species and their domestic derivatives" (PDF). Journal of Archaeological Science. 31 (5): 645–651. doi:10.1016/j.jas.2003.10.006.
  10. Flamand, J.R.B.; Vankan, D.; Gairhe, K.P.; Duong, H.; Barker, J.S.F. (2003). "Genetic identification of wild Asian water buffalo in Nepal" (PDF). Animal Conservation. 6 (3): 265–270. doi:10.1017/s1367943003003329. Archived from the original (PDF) on June 2, 2013.
  11. Yang, D.Y.; Li Liu; Chen, X.; Speller, C.F. (2008). "Wild or domesticated: DNA analysis of ancient water buffalo remains from north China" (PDF). Journal of Archaeological Science. 35 (10): 2778–2785. doi:10.1016/j.jas.2008.05.010.
  12. Nowak, R. M. (1999). "Asian water buffalo". Walker's Mammals of the World. 1. Baltimore, USA and London, UK: The Johns Hopkins University Press.
  13. Aryal, A.; Shrestha, T.K.; Ram, A.; Frey, W.; Groves, C.; Hemmer, H.; Dhakal, M.; Koirala, R.J.; Heinen, J.; Raubenheimer, D. (2011). "Call to conserve the Wild Water Buffalo (Bubalus arnee) in Nepal" (PDF). International Journal of Conservation Science. 2 (4): 261–268. Retrieved 2020-05-25.
  14. Ahrestani, F.S.; Heitkönig, I.M.A.; Matsubayashi, H.; Prins, H.H.T. (2016), "Grazing and Browsing by Large Herbivores in South and Southeast Asia", in Ahrestani, F.S.; Sankaran, M. (eds.), The Ecology of Large Herbivores in South and Southeast Asia, Ecological Studies, 225, Springer Netherlands, pp. 99–120, doi:10.1007/978-94-017-7570-0_4, ISSN 0070-8356
  15. Class, M.; Lechner-Doll, M.; Streich, W. J. (2004). "Differences in the range of fecal dry matter content between feeding types of captive wild ruminants". Acta Theriologica. 49 (2): 259–267. doi:10.1007/bf03192525.
  16. MacKinon, J. (2008). "Subfamily Bovinae". In Smith, A. T.; Xie, Y. (eds.). A Guide to the Mammals of China. Oxfordshire: Princeton University Press. p. 472. ISBN 9781400834112.
  17. Choudhury, A. (1994). "The decline of the wild water buffalo in northeast India". Oryx. 28 (1): 70–73. doi:10.1017/s0030605300028325.
  18. Divekar, H. K. & Bhusan, B. (1988). Status of wild Asiatic buffalo (Bubalus bubalis) in the Raipur and Bastar Districts of Madhya Pradesh (Report). Technical Report of the Bombay Natural History Society of the Salim Ali Nature Conservation Fund, SANCF Report No. 3/1988.
  19. Heinen, J. T. (1993). "Population viability and management recommendations for wild water buffalo (Bubalus bubalis) in Kosi Tappu Wildlife Reserve, Nepal" (PDF). Biological Conservation. 65 (1): 29–34. doi:10.1016/0006-3207(93)90193-5. hdl:2027.42/31022.
  20. Kandel, R. C.; Solanki, G. S.; Chalise, M. K. & Sharma, B. K. (2018). "Population and Demography of Asian Wild Buffalo (Bubalus arnee Kerr, 1792) at Koshi Tappu Wildlife Reserve, Nepal". Journal of Emerging Trends in Economics and Management Sciences. 9 (4): 212–218.
  21. Kandel, R. C.; Poudel, R. C.; Sadaula, A.; Kandel, P.; Gairhe, K. P.; Pokheral, C. P.; Bajracharya, S. B.; Chalise, M. K. & Solanki, G. S. (2019). "Revisiting genetic structure of Wild Buffaloes Bubalus arnee Kerr, 1792 (Mammalia: Artiodactyla: Bovidae) in Koshi Tappu Wildlife Reserve, Nepal: an assessment for translocation programs". Journal of Threatened Taxa. 11 (15): 14942–14954. doi:10.11609/jott.4940.11.15.14942-14954.
  22. Chaiyarat, R.; Lauhachinda, V.; Kutintara, U.; Bhumpakphan, N.; Prayurasiddhi, T. (2004). "Population of Wild Water Buffalo (Bubalus bubalis) in Huai Kha Khaeng Wildlife Sanctuary, Thailand" (PDF). Natural History Bulletin Siam Society. 52 (2): 151–162.
  23. Tordoff, A. W., Timmins, R. J., Maxwell, A., Huy Keavuth, Lic Vuthy and Khou Eang Hourt (eds). (2005). Biological assessment of the Lower Mekong Dry Forests Ecoregion. WWF Greater Mekong Programme. Phnom Penh, Cambodia
  24. Daniel J. C., Grubh B. R. (1966). "The Indian wild buffalo Bubalus bubalis (Linn), in peninsular India: a preliminary survey". Journal of the Bombay Natural History Society. 63: 32–53.
  25. Lēkhakun, B., Mcneely, J. A. (1988). Mammals of Thailand. 2nd edition. Saha Karn Bhaet, Bangkok, Thailand
  26. Humphrey, S. R., Bain, J. R. (1990). Endangered animals of Thailand. Issue 6 of Flora & Fauna handbook. Sandhill Crane Press. ISBN 1-877743-05-4
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