Bengal tiger


The Bengal tiger Panthera tigris tigris is the most numerous tiger subspecies By 2011, the total population was estimated at fewer than 2,500 individuals with a decreasing trend None of the 'Tiger Conservation Landscapes' within the Bengal tiger's range is considered large enough to support an effective population size of 250 adult individuals Since 2010, it is listed as Endangered on the IUCN Red List[1]

As of 2010, Bengal tiger populations in India have been estimated at 1,706–1,909[2] As of 2014, they had reputedly increased to an estimated 2,226 individuals,[3] but the method used in the census may not be accurate[4][5]

Bengal tigers number around 440 in Bangladesh and 163–253 in Nepal[6][7][8] Prior censuses placed the population of tigers in Bhutan at around 65-75 individuals, however, the latest census estimated that 103 wild Bengal tigers are living in the country[9]

Bengal is traditionally fixed as the typical locality for the binomen Panthera tigris, to which the British taxonomist Reginald Innes Pocock subordinated the Bengal tiger in 1929 under the trinomen Panthera tigris tigris[10] The Bengal, Caspian and Siberian tigers, and lion rank among the biggest cats[11][12][13]

It is the national animal of both India and Bangladesh[14]

Contents

  • 1 Characteristics
    • 11 Genetic ancestry
    • 12 Body weight
    • 13 Records
  • 2 Distribution and habitat
    • 21 India
    • 22 Bangladesh
    • 23 Nepal
    • 24 Bhutan
  • 3 Ecology and behaviour
    • 31 Hunting and diet
    • 32 Reproduction and lifecycle
  • 4 Threats
    • 41 Poaching
    • 42 Human–tiger conflict
  • 5 Conservation efforts
    • 51 In India
    • 52 In Bangladesh
    • 53 In Nepal
  • 6 Ex situ
    • 61 Admixed genetic heritage
    • 62 "Re-wilding" project in South Africa
    • 63 In the USA
  • 7 Notable Bengal tigers
  • 8 In culture
    • 81 Bengal tiger versus lion
  • 9 See also
  • 10 References
  • 11 External links

Characteristics

Facial markings of a tiger Sultan aka T72 from Ranthambhore National Park, Rajasthan, India White Bengal tiger at Pairi Daiza in Belgium

The Bengal tiger's coat is yellow to light orange, with stripes ranging from dark brown to black; the belly and the interior parts of the limbs are white, and the tail is orange with black rings The white tiger is a recessive mutant of the Bengal tiger, which is reported in the wild from time to time in Assam, Bengal, Bihar and especially from the former State of Rewa However, it is not to be mistaken as an occurrence of albinism In fact, there is only one fully authenticated case of a true albino tiger, and none of black tigers, with the possible exception of one dead specimen examined in Chittagong in 1846[15]

Male Bengal tigers have an average total length of 270 to 310 cm 110 to 120 in including the tail, while females measure 240 to 265 cm 94 to 104 in on average[12] The tail is typically 85 to 110 cm 33 to 43 in long, and on average, tigers are 90 to 110 cm 35 to 43 in in height at the shoulders[16] The weight of males ranges from 180 to 258 kg 397 to 569 lb, while that of the females ranges from 100 to 160 kg 220 to 350 lb[12] The smallest recorded weights for Bengal tigers are from the Bangladesh Sundarbans, where adult females are 75 to 80 kg 165 to 176 lb[17] Bengal tigers have exceptionally stout teeth, and the canines are the longest among all living felids; measuring from 75 to 10 cm 30 to 39 in in length[18]

Genetic ancestry

Bengal tigers are defined by three distinct mitochondrial nucleotide sites and 12 unique microsatellite alleles The pattern of genetic variation in the Bengal tiger corresponds to the premise that they arrived in India approximately 12,000 years ago[19] This is consistent with the lack of tiger fossils from the Indian subcontinent prior to the late Pleistocene and the absence of tigers from Sri Lanka, which was separated from the subcontinent by rising sea levels in the early Holocene[20]

Body weight

Female Bengal tiger in the Ranthambhore Tiger Reserve

Bengal tigers may weigh up to 325 kg 717 lb and reach a head and body length of 320 cm 130 in[18] Several scientists indicated that adult male Bengal tigers from Nepal, Bhutan, and Assam, Uttarakhand and West Bengal in northern India collectively, the tigers of the Terai consistently attain more than 227 kg 500 lb of body weight Seven adult males captured in Chitwan National Park in the early 1970s had an average weight of 235 kg 518 lb ranging from 200 to 261 kg 441 to 575 lb, and that of the females was 140 kg 310 lb ranging from 116 to 164 kg 256 to 362 lb[21] Males from northern India are nearly as large as Siberian tigers with a greatest length of skull of 332 to 376 mm 131 to 148 in[22]

Verifiable Sundarbans tiger weights are not found in any scientific literature Forest Department records list weight measurements for these tigers, but none are verifiable and all are guesstimates There are also reports of head and body lengths, some of which are listed as over 3657 cm 1440 in More recently, researchers from the University of Minnesota and the Bangladesh Forest Department carried out a study for the US Fish and Wildlife Service and weighed three Sundarbans tigresses from Bangladesh All three tigers were female, two of which were collared, captured and sedated, but the other one had been killed by local villagers The two collared tigresses were weighed using 150 kg 330 lb scales, and the tigress killed by villagers was weighed using a balance scale and weights The two collared females both showed signs of teeth wear and both were between 12 and 14 years old The tigress killed by the villagers was a young adult, probably between 3 and 4 years old, and she was likely a pre-territorial transient The three tigresses had a mean weight of 767 kg 169 lb One of the two older female's weight 75 kg 165 lb weighed slightly less than the mean because of her old age and relatively poor condition at the time of capture Skulls and body weights of Sundarbans tigers were found to be distinct from other subspecies, indicating that they may have adapted to the unique conditions of the mangrove habitat Their small sizes are probably due to a combination of intense intraspecific competition and small size of prey available to tigers in the Sundarbans, compared to the larger deer and other prey available to tigers in other parts[23]

Comparing tiger versus lion, a weight range of 150 to 189 kg 331 to 417 lb is considered fairly average for a male East African lion in the Serengeti[24][25]

Records

Two tigers shot in Kumaon and near Oude at the end of the 19th century allegedly measured more than 12 ft 370 cm But at the time, sportsmen had not yet adopted a standard system of measurement; some would measure between pegs while others would round the curves[26]

In the beginning of the 20th century, a male Bengal tiger was shot in central India with a head and body length of 221 cm 87 in between pegs, a chest girth of 150 cm 59 in, a shoulder height of 109 cm 43 in and a tail length of 81 cm 32 in, which was perhaps bitten off by a rival male This specimen could not be weighed, but it was calculated to weigh no less than 272 kg 600 lb[27]

A heavy male weighing 570 lb 260 kg was shot in northern India in the 1930s[28] However, the heaviest known tiger was a huge male killed in 1967 that weighed 3887 kg 857 lb and measured 322 cm 127 in in total length between pegs, and 338 cm 133 in over curves This specimen is on exhibition in the Mammals Hall of the Smithsonian Institution[29] In 1980 and 1984, scientists captured and tagged two male tigers in Chitwan National Park that weighed more than 270 kg 600 lb[30]

Distribution and habitat

A Bengal tiger roaming in Ranthambore National Park, Rajasthan, India

In 1982, a sub-fossil right middle phalanx was found in a prehistoric midden near Kuruwita in Sri Lanka, which is dated to about 16,500 ybp and tentatively considered to be of a tiger Tigers appear to have arrived in Sri Lanka during a pluvial period during which sea levels were depressed, evidently prior to the last glacial maximum about 20,000 years ago[31] In 1929, the British taxonomist Pocock assumed that tigers arrived in southern India too late to colonize Sri Lanka, which earlier had been connected to India by a land bridge[10]

In the Indian subcontinent, tigers inhabit tropical moist evergreen forests, tropical dry forests, tropical and subtropical moist deciduous forests, mangroves, subtropical and temperate upland forests, and alluvial grasslands Latter tiger habitat once covered a huge swath of grassland and riverine and moist semi-deciduous forests along the major river system of the Gangetic and Brahmaputra plains, but has now been largely converted to agricultural land or severely degraded Today, the best examples of this habitat type are limited to a few blocks at the base of the outer foothills of the Himalayas including the Tiger Conservation Units TCUs Rajaji-Corbett, Bardia-Banke, and the transboundary TCUs Chitwan-Parsa-Valmiki, Dudhwa-Kailali and Sukla Phanta-Kishanpur Tiger densities in these TCUs are high, in part because of the extraordinary biomass of ungulate prey[32]

The Bengal tigers in the Sundarbans in India and Bangladesh are the only tigers in the world inhabiting mangrove forests The population in the Indian Sundarbans is estimated as 70 tigers in total[2]

India

A Bengal tiger in Mangalore White tiger at Indira Gandhi Zoological Park, Visakhapatnam Tigers at Indira Gandhi Zoological Park

In the past, Indian censuses of wild tigers relied on the individual identification of footprints known as pug marks — a method that has been criticised as deficient and inaccurate, though now camera traps are being used in many places[33]

Good tiger habitats in subtropical and temperate upland forests include the Tiger Conservation Units TCUs Manas-Namdapha TCUs in tropical dry forest include Hazaribagh National Park, Nagarjunsagar-Srisailam Tiger Reserve, Kanha-Indravati corridor, Orissa dry forests, Panna National Park, Melghat Tiger Reserve and Ratapani Tiger Reserve The TCUs in tropical moist deciduous forest are probably some of the most productive habitats for tigers and their prey, and include Kaziranga-Meghalaya, Kanha-Pench, Simlipal and Indravati Tiger Reserves The TCUs in tropical moist evergreen forests represent the less common tiger habitats, being largely limited to the upland areas and wetter parts of the Western Ghats, and include the tiger reserves of Periyar, Kalakad-Mundathurai, Bandipur and Parambikulam Wildlife Sanctuary[32]

During the tiger census of 2008, camera trap and sign surveys using GIS were employed to project site-specific densities of tigers, their co-predators and prey Based on the result of these surveys, the total tiger population was estimated at 1,411 individuals ranging from 1,165 to 1,657 adult and sub-adult tigers of more than 15 years of age Across India, six landscape complexes were surveyed that host tigers and have the potential to be connected These landscapes comprise the following:[34]

  • in the Shivaliks–Gangetic flood plain landscape there are six populations with an estimated population size of 259 to 335 individuals occupying 5,080 km2 1,960 sq mi of forested habitats, which are located in Rajaji and Corbett national parks, in the connected habitats of Dudhwa-Kheri-Pilibhit, in Suhelwa Tiger Reserve, in Sohagi Barwa Sanctuary and in Valmiki National Park;
  • in the Central Indian highlands there are 17 populations with an estimated population size of 437 to 661 individuals occupying 48,610 km2 18,770 sq mi of forested habitats, which are located in the landscapes of Kanha-Pench, Satpura-Melghat, Sanjay-Palamau, Navegaon-Indravati; isolated populations are supported in the tiger reserves of Bandhavgarh, Tadoba, Simlipal and the national parks of Panna, Ranthambore–Kuno–Palpur–Madhav and Saranda;
  • in the Eastern Ghats landscape there is a single population with an estimated population size of 49 to 57 individuals occupying 7,772 km2 3,001 sq mi of habitat in three separate forest blocks located in the Srivenkateshwara National Park, Nagarjunasagar Tiger Reserve and the adjacent proposed Gundla Brahmeshwara National Park, and forest patches in the tehsils of Kanigiri, Baduel, Udayagiri and Giddalur;
  • in the Western Ghats landscape there are seven populations with an estimated population size of 336 to 487 individuals occupying 21,435 km2 8,276 sq mi forest in three major landscape units Periyar-Kalakad-Mundathurai, Bandipur-Parambikulam-Sathyamangalam-Mudumalai-Anamalai-Mukurthi and Anshi-Kudremukh-Dandeli;
  • in the Brahmaputra flood plains and north-eastern hills tigers occupy 4,230 km2 1,630 sq mi in several patchy and fragmented forests;
  • in the Sundarbans National Park tigers occupy about 1,586 km2 612 sq mi of mangrove forest

In May 2008, forest officials spotted 14 tiger cubs in Rajasthan's Ranthambore National Park[35] In June 2008, a tiger from Ranthambore was relocated to Sariska Tiger Reserve, where all tigers had fallen victim to poachers and human encroachments since 2005[36]

As of 2014, adult and subadult tigers at 15 years or older are estimated to number 408 in Karnataka, 340 in Uttarakhand, 308 in Madhya Pradesh, 229 in Tamil Nadu, 190 in Maharashtra, 167 in Assam, 136 in Kerala, and 117 in Uttar Pradesh[3]

Bangladesh

Tigers in Bangladesh are now relegated to the forests of the Sundarbans and the Chittagong Hill Tracts[37] The Chittagong forest is contiguous with tiger habitat in India and Myanmar, but the tiger population is of unknown status[38]

As of 2004, population estimates in Bangladesh ranged from 200 to 419, mostly in the Sundarbans[37][39] This region is the only mangrove habitat in this bioregion, where tigers survive, swimming between islands in the delta to hunt prey[32] Bangladesh's Forest Department is raising mangrove plantations supplying forage for spotted deer Since 2001, afforestation has continued on a small scale in newly accreted lands and islands of the Sundarbans[6] From October 2005 to January 2007, the first camera-trap survey was conducted across six sites in the Bangladesh Sundarbans to estimate tiger population density The average of these six sites provided an estimate of 37 tigers per 100 km2 39 sq mi Since the Bangladesh Sundarbans is an area of 5,770 km2 2,230 sq mi it was inferred that the total tiger population comprised approximately 200 individuals[40] In another study, home ranges of adult female tigers were recorded comprising between 12 and 14 km2 46 and 54 sq mi,[41] which would indicate an approximate carrying capacity of 150 adult females[42] The small home range of adult female tigers and consequent high density of tigers in this habitat type relative to other areas may be related to both the high density of prey and the small size of the Sundarbans tigers[17]

Since 2007 tiger monitoring surveys have been carried out every year by WildTeam in the Bangladesh Sundarbans to monitor changes in the Bangladesh tiger population and assess the effectiveness of conservation actions This survey measures changes in the frequency of tiger track sets along the sides of tidal waterways as an index of relative tiger abundance across the Sundarbans landscape[43]

The population size for the Bangladesh Sundarbans was estimated as 100–150 adult females or 335–500 tigers overall Female home ranges, recorded using Global Positioning System collars, were some of the smallest recorded for tigers, indicating that the Bangladesh Sundarbans could have one of the highest densities and largest populations of tigers anywhere in the world They are isolated from the next tiger population by a distance of up to 300 km 190 mi Information is lacking on many aspects of Sundarbans tiger ecology, including relative abundance, population status, spatial dynamics, habitat selection, life history characteristics, taxonomy, genetics, and disease There is also no monitoring program in place to track changes in the tiger population over time, and therefore no way of measuring the response of the population to conservation activities or threats Most studies have focused on the tiger-human conflict in the area, but two studies in the Sundarbans East Wildlife sanctuary documented habitat-use patterns of tigers, and abundances of tiger prey, and another study investigated tiger parasite load Some major threats to tigers have been identified The tigers living in the Sundarbans are threatened by habitat destruction, prey depletion, highly aggressive and rampant intraspecific competition, tiger-human conflict, and direct tiger loss[23]

Nepal

The tiger population in the Terai of Nepal is split into three isolated subpopulations that are separated by cultivation and densely settled habitat The largest population lives in Chitwan National Park and in the adjacent Parsa Wildlife Reserve encompassing an area of 2,543 km2 982 sq mi of prime lowland forest To the west, the Chitwan population is isolated from the one in Bardia National Park and adjacent unprotected habitat farther west, extending to within 15 km 93 mi of the Shuklaphanta Wildlife Reserve, which harbours the smallest population[44] The bottleneck between the Chitwan-Parsa and Bardia-Sukla Phanta metapopulations is situated just north of the town of Butwal

As of 2009, an estimated 121 breeding tigers lived in Nepal[45] By 2010, the number of adult tigers had reached 155[46] A survey conducted from December 2009 to March 2010 indicates that 125 adult tigers live in Chitwan National Park and its border areas covering 1,261 km2 487 sq mi[47] From February to June 2013, a camera trapping survey was carried out in the Terai Arc Landscape, covering an area of 4,841 km2 1,869 sq mi in 14 districts The country's tiger population was estimated at 163–235 breeding adults comprising 102–152 tigers in the Chitwan-Parsa protected areas, 48–62 in the Bardia-Banke National Parks and 13–21 in the Shuklaphanta Wildlife Reserve[48]

Bhutan

As of 2015, the population in Bhutan is estimated at 103 individuals[9] Tigers occur from an altitude of 200 m 660 ft in the subtropical Himalayan foothills in the south along the border with India to over 3,000 m 9,800 ft in the temperate forests in the north, and are known from 17 of 18 districts Their stronghold appears to be the central belt of the country ranging in altitude between 2,000 and 3,500 m 6,600 and 11,500 ft, between the Mo River in the west and the Kulong River in the east[49] In 2010, camera traps recorded a pair of tigers at altitudes of 3,000 to 4,100 m 9,800 to 13,500 ft The male was recorded scent-marking, and the female can also be seen to be lactating, confirming that the pair are living within their own territory, and strongly suggesting they are breeding at that altitude[50]

Ecology and behaviour

A Bengal tigress with her cubs in the Bandhavgarh National Park, India

The basic social unit of the tiger is the elemental one of mother and offspring Adult animals congregate only on an ad hoc and transitory basis when special conditions permit, such as plentiful supply of food Otherwise they lead solitary lives, hunting individually for the dispersed forest and tall grassland animals, upon which they prey They establish and maintain home ranges Resident adults of either sex tend to confine their movements to a definite area of habitat within which they satisfy their needs, and in the case of tigresses, those of their growing cubs Besides providing the requirements of an adequate food supply, sufficient water and shelter, and a modicum of peace and seclusion, this location must make it possible for the resident to maintain contact with other tigers, especially those of the opposite sex Those sharing the same ground are well aware of each other's movements and activities[15]

In the Panna Tiger Reserve an adult radio-collared male tiger moved 17 to 105 km 11 to 65 mi between locations on successive days in winter, and 1 to 139 km 062 to 864 mi in summer His home range was about 200 km2 77 sq mi in summer and 110 km2 42 sq mi in winter Included in his home range were the much smaller home ranges of two females, a tigress with cubs and a sub-adult tigress They occupied home ranges of 16 to 31 km2 62 to 120 sq mi[51]

The home ranges occupied by adult male residents tend to be mutually exclusive, even though one of these residents may tolerate a transient or sub-adult male at least for a time A male tiger keeps a large territory in order to include the home ranges of several females within its bounds, so that he may maintain mating rights with them Spacing among females is less complete Typically there is partial overlap with neighbouring female residents They tend to have core areas, which are more exclusive, at least for most of the time Home ranges of both males and females are not stable The shift or alteration of a home range by one animal is correlated with a shift of another Shifts from less suitable habitat to better ones are made by animals that are already resident New animals become residents only as vacancies occur when a former resident moves out or dies There are more places for resident females than for resident males[15]

During seven years of camera trapping, tracking, and observational data in Chitwan National Park, 6 to 9 breeding tigers, 2 to 16 non-breeding tigers, and 6 to 20 young tigers of less than one year of age were detected in the study area of 100 km2 39 sq mi One of the resident females left her territory to one of her female offspring and took over an adjoining area by displacing another female; and a displaced female managed to re-establish herself in a neighboring territory made vacant by the death of the resident Of 11 resident females, 7 were still alive at the end of the study period, 2 disappeared after losing their territories to rivals, and 2 died The initial loss of two resident males and subsequent take over of their home ranges by new males caused social instability for two years Of 4 resident males, 1 was still alive and 3 were displaced by rivals Five litters of cubs were killed by infanticide, 2 litters died because they were too young to fend for themselves when their mothers died One juvenile tiger was presumed dead after being photographed with severe injuries from a deer snare The remaining young lived long enough to reach dispersal age, 2 of them becoming residents in the study area[52]

Hunting and diet

Tiger attacking a sambar in Ranthambore

Tigers are carnivores They prefer hunting large ungulates such as chital, sambar, gaur, and to a lesser extent also barasingha, water buffalo, nilgai, serow and takin Among the medium-sized prey species they frequently kill wild boar, and occasionally hog deer, muntjac and grey langur Small prey species such as porcupines, hares and peafowl form a very small part in their diet Because of the encroachment of humans into their habitat, they also prey on domestic livestock[53][54][55][56][57]

In Nagarahole National Park, the average weight of 83 tiger kills was 401 kg 884 lb[18] This sample included several gaurs weighing upwards of 1,000 kg 2,200 lb Gaurs were the most preferred choice of prey by tigers in Nagarahole, making up 448% of all tiger kills Sambar deer were the second most preferred and made up 286% of all tiger kills[58] In Bandipur National Park, gaur and sambar together also constituted 73% of their diet[59]

In most cases, tigers approach their victim from the side or behind from as close a distance as possible and grasp the prey's throat to kill it Then they drag the carcass into cover, occasionally over several hundred meters, to consume it The nature of the tiger's hunting method and prey availability results in a "feast or famine" feeding style: they often consume 18–40 kilograms 40–88 lb of meat at one time[12]

Bengal tigers have been known to take other predators, such as leopards, wolves, jackals, foxes, crocodiles, Asiatic black bears, sloth bears, and dholes as prey, although these predators are not typically a part of their diet They rarely attack adult elephants and rhinoceroses but such extraordinarily rare events have been recorded[60][61] The British-Indian hunter and naturalist Jim Corbett also described an incident of two tigers fighting and killing a large bull elephant If injured, old or weak, or their normal prey is becoming scarce, they may even attack humans and become man-eaters[62]

Reproduction and lifecycle

A male and female Bengal tiger interact with each other

The tiger in India has no definite mating and birth seasons Most young are born in December and April[63] Young have also been found in March, May, October and November[64] In the 1960s, certain aspects of tiger behaviour at Kanha National Park indicated that the peak of sexual activity was from November to about February, with some mating probably occurring throughout the year[65]

Males reach maturity at 4–5 years of age, and females at 3–4 years A Bengal comes into heat at intervals of about 3–9 weeks, and is receptive for 3–6 days After a gestation period of 104–106 days, 1–4 cubs are born in a shelter situated in tall grass, thick bush or in caves Newborn cubs weigh 780 to 1,600 g 172 to 353 lb and they have a thick wooly fur that is shed after 35–5 months Their eyes and ears are closed Their milk teeth start to erupt at about 2–3 weeks after birth, and are slowly replaced by permanent dentition from 85–95 weeks of age onwards They suckle for 3–6 months, and begin to eat small amounts of solid food at about 2 months of age At this time, they follow their mother on her hunting expeditions and begin to take part in hunting at 5–6 months of age At the age of 2–3 years, they slowly start to separate from the family group and become transient — looking out for an area, where they can establish their own territory Young males move further away from their mother's territory than young females Once the family group has split, the mother comes into heat again[12]

Threats

Over the past century tiger numbers have fallen dramatically, with a decreasing population trend None of the Tiger Conservation Landscapes within the Bengal tiger range is large enough to support an effective population size of 250 individuals Habitat losses and the extremely large-scale incidences of poaching are serious threats to the species' survival[1]

The challenge in the Western Ghats forest complex in western South India, an area of 14,400 square miles 37,000 km2 stretching across several protected areas is that people live within its borders The Save the Tiger Fund Council estimates that 7,500 landless people live illegally inside the boundaries of the 386-square-mile 1,000 km2 Nagarhole National Park in southwestern India A voluntary if controversial resettlement is underway with the aid of the Karnataka Tiger Conservation Project led by K Ullas Karanth of the Wildlife Conservation Society[citation needed]

A 2007 report by UNESCO, "Case Studies on Climate Change and World Heritage" has stated that an anthropogenic 45-cm rise in sea level, likely by the end of the 21st century, according to the Intergovernmental Panel on Climate Change, combined with other forms of anthropogenic stress on the Sundarbans, could lead to the destruction of 75% of the Sundarbans mangroves[citation needed] The Forest Rights Act passed by the Indian government in 2006 grants some of India's most impoverished communities the right to own and live in the forests, which likely brings them into conflict with wildlife and under-resourced, under-trained, ill-equipped forest department staff In the past, evidence showed that humans and tigers cannot co-exist[66]

Poaching

The most significant immediate threat to the existence of wild tiger populations is the illegal trade in poached skins and body parts between India, Nepal and China The governments of these countries have failed to implement adequate enforcement response, and wildlife crime remained a low priority in terms of political commitment and investment for years There are well-organised gangs of professional poachers, who move from place to place and set up camp in vulnerable areas Skins are rough-cured in the field and handed over to dealers, who send them for further treatment to Indian tanning centres Buyers choose the skins from dealers or tanneries and smuggle them through a complex interlinking network to markets outside India, mainly in China Other factors contributing to their loss are urbanization and revenge killing Farmers blame tigers for killing cattle and shoot them Their skins and body parts may however become a part of the illegal trade[67] In Bangladesh, tigers are killed by professional poachers, local hunters, trappers, pirates and villagers Each group of people has different motives for killing tigers, ranging from profit, excitement to safety concerns All groups have access to the commercial trade in body parts[68][69]

The illicit demand for bones and body parts from wild tigers for use in Traditional Chinese medicine is the reason for the unrelenting poaching pressure on tigers on the Indian subcontinent For at least a thousand years, tiger bones have been an ingredient in traditional medicines that are prescribed as a muscle strengthener and treatment for rheumatism and body pain[70]

Between 1994 and 2009, the Wildlife Protection Society of India has documented 893 cases of tigers killed in India, which is just a fraction of the actual poaching and trade in tiger parts during those years[71]

In 2006, India's Sariska Tiger Reserve lost all of its 26 tigers, mostly to poaching[72] In 2007, police in Allahabad raided a meeting of suspected poachers, traders and couriers One of the arrested persons was the biggest buyer of tiger parts in India who used to sell them off to the Chinese traditional medicinal market, using women from a nomadic tribe as couriers[73] In 2009, none of the 24 tigers residing in the Panna Tiger Reserve were left because of excessive poaching[74] In November 2011, two tigers were found dead in Maharashtra: a male tiger was trapped and killed in a wire snare; a tigress died of electrocution after chewing at an electric cable supplying power to a water pump; another tigress was found dead in Kanha Tiger Reserve landscape — poisoning is suspected to be the cause of her death[75]

Human–tiger conflict

Main article: Tiger attack

The Indian subcontinent has served as a stage for intense human and tiger confrontations The region affording habitat where tigers have achieved their highest densities is also one which has housed one of the most concentrated and rapidly expanding human populations At the beginning of the 19th century tigers were so numerous it seemed to be a question as to whether man or tiger would survive It became the official policy to encourage the killing of tigers as rapidly as possible, rewards being paid for their destruction in many localities The United Provinces supported large numbers of tigers in the submontane Terai region, where man-eating had been uncommon In the latter half of the 19th century, marauding tigers began to take a toll of human life These animals were pushed into marginal habitat, where tigers had formerly not been known, or where they existed only in very low density, by an expanding population of more vigorous animals that occupied the prime habitat in the lowlands, where there was high prey density and good habitat for reproduction The dispersers had no where else to go, since the prime habitat was bordered in the south by cultivation They are thought to have followed back the herds of domestic livestock that wintered in the plains when they returned to the hills in the spring, and then being left without prey when the herds dispersed back to their respective villages These tigers were the old, the young and the disabled All suffered from some disability, mainly caused either by gunshot wounds or porcupine quills[76]

In the Sundarbans, 10 out of 13 man-eaters recorded in the 1970s were males, and they accounted for 86% of the victims These man-eaters have been grouped into the confirmed or dedicated ones who go hunting especially for human prey; and the opportunistic ones, who do not search for humans but will, if they encounter a man, attack, kill and devour him In areas where opportunistic man-eaters were found, the killing of humans was correlated with their availability, most victims being claimed during the honey gathering season[77] Tigers in the Sunderbans presumably attacked humans who entered their territories in search of wood, honey or fish, thus causing them to defend their territories The number of tiger attacks on humans may be higher outside suitable areas for tigers, where numerous humans are present but which contain little wild prey for tigers[78] Between 1999 and 2001, the highest concentration of tiger attacks on people occurred in the northern and western boundaries of the Bangladesh Sundarbans Most people were attacked in the mornings while collecting fuel wood, timber, or other raw materials, or while fishing[79]

In Nepal, the incidence of man-eating tigers has been only sporadic In Chitwan National Park no cases were recorded before 1980 In the following few years, 13 people have been killed and eaten in the park and its environs In the majority of cases, man-eating appeared to have been related to an intra-specific competition among male tigers[76]

In December 2012, a tiger was shot by the Kerala Forest Department on a coffee plantation on the fringes of the Wayanad Wildlife Sanctuary Chief Wildlife Warden of Kerala ordered the hunt for the animal after mass protests erupted as the tiger had been carrying away livestock The Forest Department had constituted a special task force to capture the animal with the assistance of a 10-member Special Tiger Protection Force and two trained elephants from the Bandipur Tiger Reserve in Karnataka[80][81]

Conservation efforts

Main article: Tiger conservation A Bengal tiger in Karnataka, India

An area of special interest lies in the Terai Arc Landscape in the Himalayan foothills of northern India and southern Nepal, where 11 protected areas comprising dry forest foothills and tall-grass savannas harbor tigers in a 49,000 square kilometres 19,000 sq mi landscape The goals are to manage tigers as a single metapopulation, the dispersal of which between core refuges can help maintain genetic, demographic, and ecological integrity, and to ensure that species and habitat conservation becomes mainstreamed into the rural development agenda In Nepal a community-based tourism model has been developed with a strong emphasis on sharing benefits with local people and on the regeneration of degraded forests The approach has been successful in reducing poaching, restoring habitats, and creating a local constituency for conservation[82]

WWF partnered with Leonardo DiCaprio to form a global campaign, Save Tigers Now, with the ambitious goal of building political, financial and public support to double the wild tiger population by 2022[83] Save Tigers Now started its campaign in 12 different WWF Tiger priority landscapes, since May 2010[84]

In India

Main article: Project Tiger A Bengal tiger at an unknown location

In 1973, Project Tiger was launched aiming at ensuring a viable population of tigers in the country and preserving areas of biological importance as a natural heritage for the people The project's task force visualised these tiger reserves as breeding nuclei, from which surplus animals would emigrate to adjacent forests The selection of areas for the reserves represented as close as possible the diversity of ecosystems across the tiger's distribution in the country Funds and commitment were mustered to support the intensive program of habitat protection and rehabilitation under the project By the late 1980s, the initial nine reserves covering an area of 9,115 square kilometres 3,519 sq mi had been increased to 15 reserves covering an area of 24,700 square kilometres 9,500 sq mi More than 1100 tigers were estimated to inhabit the reserves by 1984[85][86]

Through this initiative the population decline was reversed initially, but has resumed in recent years; India's tiger population decreased from 3,642 in the 1990s to just over 1,400 from 2002 to 2008[87]

The Indian Wildlife Protection Act of 1972 enables government agencies to take strict measures so as to ensure the conservation of the Bengal tigers The Wildlife Institute of India estimates showed that tiger numbers had fallen in Madhya Pradesh by 61%, Maharashtra by 57%, and Rajasthan by 40% The government's first tiger census, conducted under the Project Tiger initiative begun in 1973, counted 1,827 tigers in the country that year Using that methodology, the government observed a steady population increase, reaching 3,700 tigers in 2002 However, the use of more reliable and independent censusing technology including camera traps for the 2007–2008 all-India census has shown that the numbers were in fact less than half than originally claimed by the Forest Department[88]

Following the revelation that only 1,411 Bengal tigers existed in the wild in India, down from 3,600 in 2003, the Indian government set up eight new tiger reserves[89] Because of dwindling tiger numbers, the Indian government has pledged US$153 million to further fund the Project Tiger initiative, set up a Tiger Protection Force to combat poachers, and fund the relocation of up to 200,000 villagers to minimize human-tiger interaction[90] Tiger scientists in India, such as Raghu Chundawat and Ullas Karanth have called for use of technology in the conservation efforts[91]

George Schaller wrote:[92]

"India has to decide whether it wants to keep the tiger or not It has to decide if it is worthwhile to keep its National Symbol, its icon, representing wildlife It has to decide if it wants to keep its natural heritage for future generations, a heritage more important than the cultural one, whether we speak of its temples, the Taj Mahal, or others, because once destroyed it cannot be replaced"

In January 2008, the Government of India launched a dedicated anti-poaching force composed of experts from Indian police, forest officials and various other environmental agencies[93] Indian officials successfully started a project to reintroduce the tigers into the Sariska reserve[94] The Ranthambore National Park is often cited as a major success by Indian officials against poaching[95] The population increased to 1,706 in 2011 and 2,226 in 2014[96] There are 48[97] tiger reserves in India[98]

In Bangladesh

WildTeam is working with local communities and the Bangladesh Forest Department to reduce human-tiger conflict in the Bangladesh Sundarbans For over 100 years people, tigers, and livestock have been injured and killed in the conflict; in recent decades up to 50 people, 80 livestock, and 3 tigers have been killed in a year Now, through WildTeam's work, there is a boat-based Tiger Response team that provides first aid, transport, and body retrieval support for people being killed in the forest by tigers WildTeam has also set up 49 volunteer Village Response Teams that are trained to save tigers that have strayed into the village areas and would be otherwise killed These village teams are made up of over 350 volunteers, who are also now supporting anti-poaching work and conservation education/awareness activities WildTeam also works to empower local communities to access the government funds for compensating the loss/injury of livestock and people from the conflict To monitor the conflict and assess the effectiveness of actions, WildTeam have also set up a human-tiger conflict data collection and reporting system

In Nepal

The government aims at doubling the country's tiger population by 2022, and in May 2010, decided to establish Banke National Park with a protected area of 550 square kilometres 210 sq mi, which bears good potential for tiger habitat[99] It is protected in Chitwan National Park, Bardiya National Park, Sukla Phanta Wildlife Reserve, etc

Ex situ

A captive Bengal tiger in Bannerghatta National Park, India Play media Video of a Bengal tiger

Bengal tigers have been captive bred since 1880 and widely crossed with other tiger subspecies[100] Indian zoos have bred tigers for the first time at the Alipore Zoo in Kolkata The 1997 International Tiger Studbook lists the global captive population of Bengal tigers at 210 individuals that are all kept in Indian zoos, except for one female in North America Completion of the Indian Bengal Tiger Studbook is a necessary prerequisite to establishing a captive management program for tigers in India[101]

Admixed genetic heritage

In July 1976, Billy Arjan Singh acquired a hand-reared tigress named Tara from Twycross Zoo in the United Kingdom, and reintroduced her to the wild in Dudhwa National Park with the permission of India's then Prime Minister Indira Gandhi[102] In the 1990s, some tigers from this area were observed to have the typical appearance of Siberian tigers, namely a large head, pale fur, white complexion, and wide stripes, and were suspected to be Ussuri–Bengal tiger hybrids Billy Arjan Singh sent hair samples of tigers from the national park to the Centre for Cellular and Molecular Biology in Hyderabad where the samples were analysed using mitochondrial sequence analysis Results revealed that the tigers in question had an Indian tiger mitochondrial haplotype indicating that their mother was an Indian tiger[103] Skin, hair and blood samples from 71 tigers collected in various Indian zoos, in the National Museum in Kolkata and including two samples from Dudhwa National Park were prepared for microsatellite analysis that revealed that two tigers had alleles in two loci contributed by Bengal and Siberian tiger subspecies[104] However, samples of two hybrid specimens constituted a too small sample base to conclusively assume that Tara was the source of the Siberian tiger genes[105]

"Re-wilding" project in South Africa

In 2000, the Bengal tiger re-wilding project Tiger Canyons was started by John Varty, who together with the zoologist Dave Salmoni trained captive-bred tiger cubs how to stalk, hunt, associate hunting with food and regain their predatory instincts They claimed that once the tigers proved that they can sustain themselves in the wild, they would be released into a free-range sanctuary of South Africa to fend for themselves[106]

The project has received controversy after accusations by their investors and conservationists of manipulating the behaviour of the tigers for the purpose of a film production, Living with Tigers, with the tigers believed to be unable to hunt[107][108] Stuart Bray, who had originally invested a large sum of money in the project, claimed that he and his wife, Li Quan, watched the film crew "[chase] the prey up against the fence and into the path of the tigers just for the sake of dramatic footage"[107][108]

The four tigers involved in this project have been confirmed to be crossbred Siberian–Bengal tigers, which should neither be used for breeding nor being released into the Karoo Tigers that are not genetically pure will not be able to participate in the tiger Species Survival Plan, as they are not used for breeding, and are not allowed to be released into the wild[109]

In the USA

A white Bengal tiger at the Cougar Mountain Zoo

In October 2011, 18 Bengal tigers were among the exotic animals shot by the local sheriff's department after the 2011 Ohio exotic animal release[110]

Notable Bengal tigers

Notable Bengal tigers include the man-eating Tiger of Segur,[111] Tigers of Chowgarh,[112] Tiger of Mundachipallam,[113] Chuka man-eating tiger and Thak man-eater[114]

The Bachelor of Powalgarh, also known as the Tiger of Powalgarh, was an unusually large Bengal tiger, and is said to have measured 323 m 106 ft between pegs[115]

In culture

An early silver coin of Uttama Chola found in Sri Lanka showing the tiger emblem of the Cholas[116][117] The Pashupati seal with tiger to right of the seated divine figure Pashupati
Bengal tiger on 1947 Indian rupee
Obverse: Crowned head of George VI with lettering "GEORGE VI KING EMPEROR" Reverse: Bengal tiger with face value written in English, Hindi and Urdu, year and country
159,939,000 coins minted in 1947

The tiger is one of the animals displayed on the Pashupati seal of the Indus Valley Civilisation The tiger crest is the emblem on the Chola coins The seals of several Chola copper coins show the tiger, the Pandya emblem fish and the Chera emblem bow, indicating that the Cholas had achieved political supremacy over the latter two dynasties Gold coins found in Kavilayadavalli in the Nellore district of Andhra Pradesh have motifs of the tiger, bow and some indistinct marks[118]

Today, the tiger is the national animal of India Bangladeshi banknotes feature a tiger The political party Muslim League of Pakistan uses the tiger as its election symbol[119]

Tipu Sultan, who ruled Mysore in late 18th-century India, was also a great admirer of the animal The famed 18th-century automaton, Tipu's Tiger was also created for him[120] In India, tiger has also found a place of prestige even in Vedic literatures It has been celebrated in Hindu consciousness from time immemorial as the divine vehicle of the Goddess of Power, Durga or Shakti The animal has been chosen by the Reserve Bank of India as its emblem and Indian currency notes carry its portrait[121]

The Bengal tiger has continuously been used in various cultural fronts such as national symbolism, logo, sports, films and literature and has also been used as nicknames for famous personalities Some of them are mentioned below:

  • The flag of the Azad Hind Fauj and the Indian Legion both carried the Springing Tiger on the Indian Tricolour The Azad Hind Fauj also released postage stamps where the Tricolour's charkha was replaced by the Springing Tiger[122][123]
  • The Kolkata team in the Indian Cricket League was called the Royal Bengal Tigers Bengali: রয়্যাল বেঙ্গল টাইগার্স, formerly the Kolkata Tigers
  • The Bangladesh Cricket Board's logo features a royal Bengal tiger
  • The team representing Tollywood in Celebrity Cricket League is named Bengal Tigers
  • The Detroit Tigers Major League Baseball team has used the likeness of a Bengal tiger for many of the team's logos[124]
  • Members of the East Bengal Regiment of the Bangladesh Army are nicked 'Bengal Tigers'; the regiment's logo is a tiger face Senior Tigers is the nickname of the 1st Battalion
  • The 2007 film Maneater the third film in the Maneater Series, based on Jack Warner's novel Shikar, details the killing spree of an escaped Bengal tiger after it gets loose in a small town along the Appalachian Trail
  • In the fantasy adventure novel Life of Pi and in its 2012 film adaptation a Bengal tiger named Richard Parker is the lead character
  • University of Missouri has a Bengal tiger as their mascot; students are known as tigers, their athletic team as Missouri Tigers, and their web space and email as Bengal-space and Bengal-mail
  • Louisiana State University's Tigers are nicknamed the Bayou Bengals Mike the Tiger is the official mascot of Louisiana State University in Baton Rouge; by tradition the tiger is a live Bengal tiger
  • Cincinnati's National Football League team is named the Cincinnati Bengals
  • The varsity athletic teams representing Idaho State University in Pocatello, Idaho in intercollegiate athletics is named Idaho State Bengals
  • An episode in the TV series Minder was named "The Bengal Tiger"
  • Dominican Republic's most successful baseball team Licey Tigers are nicknamed the Bengals
  • Many people have been nicknamed Tiger or Bengal Tiger Bengali revolutionary Jatindranath Mukherjee was called Bagha Jatin Bengali for Tiger Jatin Educator Sir Ashutosh Mukherjee was often called the "Tiger of Bengal"
  • South African politician Amichand Rajbansi was also nicknamed the Bengal Tiger
  • Royal Leicestershire Regiment was nicknamed Bengal Tigers or The Tigers
  • The Beckley, West Virginia team of the Mountain State League was named Beckley Bengals They were affiliated with the Detroit Tigers in 1937[125]
  • Royal Bengals were an American basketball team based in Trenton, New Jersey that was a member of the American Basketball League
  • The Trenton Bengals were an American basketball team based in the Bronx, New York that was a member of the American Basketball League
  • Buffalo State College's sports teams are known as Buffalo State Bengals
  • Bengal Tigers also refer to a notorious street-gang of late-Victorian Manchester, England, generically referred to as scuttlers
  • "East Bengal Tigers" was the name of a field hockey team for the former East Pakistan Province, today a part of Bangladesh They used to play within the Pakistan Hockey Federation
  • The NEA Award winning[126] play, Bengal Tiger at the Baghdad Zoo is about a Bengal tiger that haunts the streets of present-day Baghdad seeking the meaning of life
  • Canna 'Bengal Tiger' is an Italian Group canna cultivar with variegated foliage
  • German heavy tank Tiger II was informally known as Königstiger German for Bengal tiger
  • The main antagonist of The Jungle Book, Shere Khan, is a Bengal tiger
  • The 1959 West German-French-Italian adventure film Der Tiger von Eschnapur is also titled Tiger of Bengal
  • Bagh Bahadur Bengali: বাঘ বাহাদুর, translation: The Tiger Dancer is a 1989 Bengali drama film, directed and written by Buddhadev Dasgupta, about a man who paints himself as a tiger and dances in a village in Bengal
  • The Calgary Tigers, often nicknamed the Bengals, were an ice hockey team based in Calgary, Alberta, Canada from 1920 until 1927 as members of the Big Four League, Western Canada Hockey League and Prairie Hockey League
  • University of Memphis's sports teams are known as Memphis Tigers TOM is the name of three Bengal tigers which have served as the mascot of the sports team since 1972
  • The 2014 Indian film Roar – Tigers of the Sundarbans is about a royal Bengal white tigress in the Sundarbans[127]
  • The Marvel Comics character Bengal wears the costume of a Bengal tiger Marvel Comics also publishes several superheroes who go by the name White Tiger
  • The character Ezekiel in Image Comics' The Walking Dead has a pet Bengal tiger named Shiva
  • Trinity Tigers is the nickname for the sports teams of Trinity University in San Antonio, Texas The school mascot is LeeRoy, a Bengal tiger In the 1950s, LeeRoy was an actual tiger who was brought to sporting events,[128]
  • The name of the ghost town Tigerville or Tiger City in South Dakota might have come from the Bengal Tiger Mine, located 2–3 miles away[129]
  • RIT's athletics nickname is the "Tigers" In 1963, RIT purchased a rescued Bengal tiger which became the Institute's mascot, named SPIRIT[130] RIT's present mascot RITchie is also a Bengal tiger[131][132]
  • The India national football team is nicknamed Blue Tigers
  • Auburn University's athletic teams are called Tigers
  • Clemson University's athletic teams are called Tigers
  • The Richmond Tigers Australian football team was founded in 1885

Bengal tiger versus lion

Main article: Tiger versus lion The British Lion's Vengeance on the Bengal Tiger, Punch cartoon from 1857

Apart from the above-mentioned uses of the Bengal tiger in culture, the fight between a tiger and a lion has, for a long time, been a popular topic of discussion by hunters, naturalists, artists, and poets, and continue to inspire the popular imagination in the present day[133][134][135] A number of experts are of the opinion that the Bengal tiger would emerge victorious in a fight against the lion[136][137][138][139][140]

There have been historical cases of fights between Bengal tigers and lions in captivity, a number of which were won by the tigers, others by the lions[134][141][142][143][144][145][146][147][148] Titus, the Roman Emperor, had Bengal tigers compelled to fight African lions, and the tigers always beat the lions[143] A tiger that belonged to the King of Oude, called 'Gunga', killed thirty lions, and destroyed another after being transferred to the zoological garden in London[144] A British officer saw several fights between lions and tigers, in which the tiger usually won[145] At the end of the 19th century, the Gaekwad of Baroda arranged a fight between a Barbary lion and a Bengal tiger from Shimla, before an audience of thousands The Gaekwad favoured the lion, and had to pay 37,000 rupees after the lion was killed by the tiger[134][141]

The Seringapatam medal depicted the British lion overcoming a prostrate tiger, the tiger being the dynastic symbol of Tipu Sultan's line This was symbolic of the British domination in India[149] The iconography persisted and during the Indian Rebellion of 1857, Punch ran a political cartoon showing the Indian rebels as a tiger, attacking a victim, being defeated by the British forces shown by the larger figure of a lion[150]

Apart from fights with lions in captivity, Bengal tigers had coexisted with Indian lions in the wilderness of South Asia, and clashes between them had been reported, before humans extirpated lions or tigers in a number of places[11][151][152][153][154] An issue today is whether or not to shift some now-endangered Indian lions from Gir Forest National Park,[155] in the State of Gujarat,[156] to Kuno Wildlife Sanctuary in the State of Madhya Pradesh, which has some tigers[157][158][159]

See also

  • Indochinese tiger

References

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External links

  • Cat Specialist Group: Panthera tigris and P t tigris
  • WildTeam — Tiger conservation in the Bangladesh Sundarbans
  • animaliascom: Bengal Tiger Panthera tigris tigris Taxonomic classification, images and videos
  • Panthera: Bengal Tiger
  • Animal Welfare Information Center: Information Resources on Tigers, Panthera tigris: Natural History, Ecology, Conservation, Biology, and Captive Care
  • Guardian News and Media Limited: The four faces of the Bengal tiger
  • Online Travel Guide: Bengal Tigers in India


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