Eld's deer

Eld's deer
Burmese brow-antlered deer at Chester Zoo
Scientific classification
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Artiodactyla
Family: Cervidae
Subfamily: Cervinae
Genus: Panolia
Species: P. eldii
Binomial name
Panolia eldii
(M'Clelland, 1842)

Eld's deer (Panolia eldii),[2] also known as the thamin or brow-antlered deer, is an endangered species of deer indigenous to Southeast Asia.[1] The species was first discovered by Westerners in Manipur in India in 1839. The original scientific name, Cervus eldi, was coined in 1844[3] in honour of Lt. Percy Eld, a British officer. The three subspecies of the Eld's deer are:[1]

Appearance

The following measurements have been reported for the Eld's deer:[6][7][8][9]

The deer are generally of medium size and are similar to the size and shape of the barasingha. The species has a very regal and graceful Cervus physique. Its legs are thin and long, and has a long body with a large head on a thin neck. The throat of a male has a thick mane of long hair. Males (stags) are taller and heavier than the females (hinds or does). Their coats, rough and coarse, change colour with the season; in summer the colour is reddish-brown, while in winter, it turns dark brown, with males tending to be darker than the females. The tail is short in length and the rump has no distinct patch. Despite these features, they are actually related to the Père David's deer.[2] The antlers, bow- or lyre-shaped, do not grow upwards, but tend to grow outwards and then inwards; a smaller branch grows towards the front of the head. The brow tines are especially long and noticeable. The brow-antlered deer is so named because they have long brow tines. They shed their antlers every year, with the largest size attained during the breeding season.[6][8][9]

Conservation status

The conservation status of three subspecies of Eld's deer, by country, are:

India

The Keibul Lamjao National Park (KLNP), covering an area of 40 km2 (15.4 sq mi) of marshland called the Phumdis within the larger Loktak Lake, was gazetted in 1977 specifically to protect the Cervus eldi eldi, the sangai in Manipuri language. Over time, public awareness and local support have evolved for conserving the subspecies of the endemic endangered Elds' deer. Concerted actions have been initiated to stop encroachment of the park and adequate security arrangements have been made to stop poaching. This fact is very somberly presented in a story form in a popular children's magazine called Chandamama, which gives a first-person symbolic narrative by the affected 'deer' itself. The final conclusion by the deer, quoted below, concisely puts the security provided in the park in a proper perspective.[10]

" 'Thanks to these youngsters who live nearby', he said. I was happy and felt indebted to the youngsters for saving our lives. My friend added that these people really loved and respected the Sangai deer. They believed that killing the Sangai was an unpardonable sin. According to a Manipuri legend, the Sangai are the link between humans and nature. So, killing us would mean breaking a bond. My friend informed me that people concerned about animals like us have formed a group. They teach others to protect animals, too.

The news that people are trying their best to save the phumdis, deer like me, and the Loktak Lake, infuses new hope in me. 'How nice of them!' I thought.

Anyway, it is getting dark and my friend and I have to return to our herd. And those of you who are around can enjoy our dancing gait as we trot back home. It would be great if I could meet you again. We could dance together at KLNP, if you can make it here some time!"

The home range of brow-antlered deer in the park is confined to 15–20 km2 (5.8–7.7 sq mi) in the southwestern part of the lake where phumdis on which the deer thrive are abundant. A study conducted on the proportion, on the basis of body weight of stag, hind and fawn, is reported to be 4:2:1. The sangai distribution dictated by shelter and availability of food is high near Toyaching, Pabotching and the Yang Kokchambi area.[11]

Censuses conducted by the wildlife wing of the Forest Department in 1975, 1990, 2000 and 2003 has shown the Eld's deer population was 14, 76, 162 and 180, respectively. The 2000 survey of 162 deer included 54 stags, 76 hinds and 32 fawns.[11][12] The reports of 2004 indicate a figure of 182 as referred in another section here, which shows the subspecies in Manipur is on the rise.

A successful captive breeding programme is underway at the Alipore Zoological Gardens in Kolkata, and many specimens of the deer have been bred here.[6][7]

Burma

For protection of the thamin subspecies of the Eld's deer, Chatthin Wildlife Sanctuary and Shwesettaw Wildlife Sanctuary (both protected sanctuaries) and Alaungdaw Kathapa National Park were chosen. Chatthin Wildlife Sanctuary, with an area of 104 sq mi (269.4 km2) in Myanmar's central plains, 125 sq mi (323.7 km2) northwest of the city of Mandalay, has Indaing deciduous broadleaf forest dominated by Dipterocarpus tuberculatus and is the habitat for four species of deer: thamin, muntjac (Muntiacus muntjac), hog deer (Cervus porcinus), and sambhar (Cervus unicolor). Subject to indiscriminate hunting in the past (till the ownership of guns was controlled after the 1960s), the thamin, highly threatened, now has a population of about 1,000. Initially, the Smithsonian National Zoo acquired a few thamin for observations and subsequently shifted a few to its Conservation and Research Center at Front Royal, Virginia for biological study.[1][13] For a cross–check of the biological studies done at the research center, the Smithsonian Institution selected the Chatthin Wildlife Sanctuary, a protected park. Special studies on the thamin deer were conducted by the conservation scientists headed by Christen Wemmer of the Smithsonian. They gathered details on the biology and survival of the species by duly correlating with the changes that occurred in the ecology of the region of the Chatthin Wildlife Sanctuary. Under the research project study, the ecology of thamin and a series of training courses in biodiversity were organised. The thamin's life cycle studies on 11 male and eight female radio–collared deer, supported by field studies by the scientists, revealed:[13]

  1. Its life cycle was well-tuned to the seasonal rhythm of its environment.
  2. An average group size was 2.5 per 1.6 km2 (0.62 sq mi); deer mother with young appeared to be the basic social unit.
  3. Males were in velvet when they were in bachelor groups.
  4. After new grass sprouts in the ashes of February and March fires, they gathered to graze on tender shoots.
  5. Males moved through the herds seeking receptive females.
  6. March and April were the months of rut.
  7. Males with their newly hardened antlers were in a state of anorexia and sexual obsession during this period.
  8. They operated in a specific home range of about 3.5 sq mi (9.1 km2) to 2.7 sq mi (7.0 km2).
  9. When food was short, some animals migrated into farmland for a few months before returning to the park; during the day they hid in small patches of degraded forest and at night they forayed into the croplands.

Smithsonian National Zoological Park, which has been closely associated with the preservation of the thamin deer, has in its conclusive observations stated:[14]

"Chatthin Wildlife Sanctuary (CWS) in Myanmar (Burma) protects the largest population of the endangered Eld's deer left in the world. It also represents one of the largest remaining patches of dipterocarp forest–a dry forest that is one of the most threatened and least protected forest types globally. Local people rely on these forests for their livelihood. The forests provide wood, food, shelter, and medicine. Restricting people's access to these forests by declaring them protected is probably not a sustainable solution and will put greater burden on lower income households potentially increasing poverty. However, if people continue to use and abuse forests unregulated they will disappear and with them the Eld's deer and many other species."

With external funding for such protection drying up, though, the efforts had not yielded encouraging results and the conclusion was the conditions were not conducive even to protect the protected parks given the political and funding situation in the country.

The picture is not encouraging in Cambodia, Laos and Vietnam, either. The Burmese brow-antlered deer is 'Near Threatened' and still occurs in reasonable numbers.

Thailand

The situation of protected areas for the Eld's deer is much worse in Thailand and along its border areas with Laos and Cambodia; it is feared that it may be difficult to prevent the “decline and likely extirpation of Eld's deer from the wild in Thailand”.[1]

Other countries

In Cambodia, Laos and Vietnam, Eld's deer was hunted for the traditional medicinal trade (particularly of this subspecies) and to meet demand for captive animals (especially from zoos) and forest habitat was degraded (deforested) to meet agriculture and infrastructural developments. The subpopulation in Hainan considered as a subspecies by Chinese conservationists was almost extinct in the wild.[1]

Assessment

In over 200 recent years of known history, the number of this species has declined substantially. Based on estimated rates of the decline of this species assessed in three generations (supposed to be at least a 15-year period) for all the species, the average value is reported to be in excess of 50%. Based on this assessment, IUCN has categorized the species as Endangered. In this assessment for determining the species-level, the numbers in India were considered to be numerically small (also found to be increasing), hence the numbers of wild populations only of Eld's deer P. e. thamin in Myanmar and P. e. siamensis of Cambodia, Laos and Vietnam were considered. The decline in population has been mainly attributed to hunting. In the case of the Myanmar thamin, the decline is discernible but not striking. The categorization is considered a middle-ground situation considering the extensively diverse conditions and conservation trends in the geographically isolated and distinct populations of this species.[1][8]

Brief particulars of the three species

Panolia eldi eldi or sangai in Manipur
Breeding and gestation period (conception to birth)

Female Eld's deer are generally found alone or in pairs with their young, but during the mating season, females and their young gather in herds of up to 50 individuals. Males also move around singly except during mating season. When rutting takes place, males compete with each other to gain control of a harem of females with which they can then mate. After a long gestation period, normally a single calf is born. The young have white spots at birth which fade away as they grow; they are weaned at seven months of age, and become sexually mature from 18 months of age onwards. The gestation period for three species is 220 to 240 days, with bithing occurring:.[1][8][9]

Panolia eldi thamin of Burma and Thailand
Panolia eldi siamens of Thailand, Laos, Cambodia, and Vietnam

Numbers in the wild

In India, the Eld's deer species (sangai) is confined to the peculiar floating bog called Phumdis in Loktak Lake and is numbered at less than a few hundred animals. The subspecies P. e. siamensis', which occupied the vast monsoon forests from Thailand to Hainan was extinct in Thailand, very few in number in Laos and Cambodia, and almost extinct in Vietnam. A few hundred deer were protected in a large enclosure in Hainan Island, China.[1][6][13] The estimated figures are:

Numbers in captivity (zoos)

In 2003, the estimated number of captive animals of the three subspecies in zoos were[1] 180 P. e. eldi, 1100 P. e. thamin and 23 P. e. siamensis.

Peculiarities

Peculiarities to each subspecies include:[1]

Habits

Some observations on the habits of Eld's deer common to all three subspecies are a) active most of the time, seek shelter from the midday sun and migrate for short periods seeking water in the dry season and food in the growing season, b)seek areas that are seasonally burned in search of new grasses that grow after the burn, c) their diets comprise a variety of grasses, herbaceous plants, and shoots, grasses, fruit and wetland plants and they poach into cultivated crops to graze and browse in nearby fields of rice, lentils, maize, peas and grapes.[1][1][6][7][15]

Threats

They are hunters' favourite game – as prized game – because of their impressive antlers and hides that are in demand in the local markets. They are widely hunted for food; they were believed to have been hunted to feed armies during many Asian wars. Their population has declined due to intense development activities necessitating reclamation of land for grazing, cultivation and fish farming, in all countries. In Burma, deforestion of the diperocarp forests is cited as a reason for the threat faced by the thamin deer. The habitat available for their protection is very limited; only 1% of the protected forests are suitable for its protection in South Asia. Even in protected areas, the animals are poached. Another striking problem is finding adequate funds and political will to protect the species. The species have a fragmented distribution and are therefore at risk from inbreeding and loss of genetic variation.[6]

Gallery

References

  1. 1 2 3 4 5 6 7 8 9 10 11 12 13 Timmins, R.J. & Duckworth, J.W. (2008). "Rucervus eldii". IUCN Red List of Threatened Species. Version 2010.4. International Union for Conservation of Nature. Retrieved 10 March 2011.
  2. 1 2 Pitraa, Fickela, Meijaard, Groves (2004). Evolution and phylogeny of old world deer. Molecular Phylogenetics and Evolution 33: 880–895.
  3. ↑ "Cervus eldii (Eld's Brow-Antlered Deer)". ZipCode.com. Retrieved 2009-04-04.
  4. ↑ Groves (2006). The genus Cervus in eastern Eurasia. European Journal of Wildlife Research 52: 14-22.
  5. ↑ Balakrishnan, Monfort, Gaur, Singh and Sorenson (2003). Phylogeography and conservation genetics of Eld's deer (Cervus eldi). Molecular Ecology 12: 1-10.
  6. 1 2 3 4 5 6 "Eld's deer (Cervus eldi". ARKieve: Images of Life on Earth. Retrieved 2009-04-05.
  7. 1 2 3 "Sangai Deer (Cervus eldii eldii)". National Zoological Park, Mathura Road, New Delhi, India. Retrieved 2009-04-05.
  8. 1 2 3 4 "Thamin or Brow-antlered Deer Cervus eldi". World Deer. Archived from the original on 26 March 2009. Retrieved 2009-04-04.
  9. 1 2 3 Richard Lydekker (1996). The Great and Small Game of India, Burma, and Tibet. Thamin (Asian Educational Services). p. 456. ISBN 9788120611627. Retrieved 2009-04-05.
  10. ↑ "Dance, Deer Sangai". Chandamama. 2008-03-20. Retrieved 2009-04-06.
  11. 1 2 S. Sangsit (2003). "Dancing Deer of Manipur". News Letter, Wild Life Institute of India, Volume 10, number 3. Archived from the original on 13 August 2005. Retrieved 2009-04-05.
  12. ↑ "'Sangai' threatened by unbridled poaching". the Hindu. 2003-03-30. Retrieved 2009-04-05.
  13. 1 2 3 Christen Wemmer. "The Thamin and a Place Called Chatthin". Smithsonian National Zoological Park. Retrieved 2009-04-05.
  14. ↑ "Conservation GIS Projects:People and the Forests of Chatthin Wildlife Sanctuary in Myanmar". Smithsonian National Zoological Park. Retrieved 2009-04-05.
  15. ↑ "Cervus eldii M'Clelland,1842". Biology. Encyclopedia of Life. Retrieved 2009-04-04.

External links

Wikimedia Commons has media related to Eld's deer.
This article is issued from Wikipedia - version of the Wednesday, February 10, 2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.