Liger

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Liger
Liger couple.jpg
Female (left) and male ligers at Everland amusement park in South Korea
Scientific classification OOjs UI icon edit-ltr.svg
Domain: Eukaryota
Kingdom: Animalia
Phylum: Chordata
Class: Mammalia
Order: Carnivora
Suborder: Feliformia
Family: Felidae
Subfamily: Pantherinae
Genus: Panthera
Species:
P. leo ♂ × P. tigris ♀

The liger is a hybrid offspring of a male lion (Panthera leo) and a tigress, or female tiger (Panthera tigris). The liger has parents in the same genus but of different species. The liger is distinct from the opposite hybrid called the tigon (of a male tiger and a lioness), and is the largest of all known extant felines. [1] [2] They enjoy swimming, which is a characteristic of tigers, and are very sociable like lions. Notably, ligers typically grow larger than either parent species, unlike tigons. [1] [2] [3]

Contents

History

The history of lion–tiger hybrids dates to at least the early 19th century in India. In 1798, Étienne Geoffroy Saint-Hilaire (1772–1844) made a colour plate of the offspring of a lion and a tiger. The name "liger", a portmanteau of lion and tiger, was coined in the 1930s. [4] "Ligress" is used to refer to a female liger, on the model of "tigress".

In 1825, G. B. Whittaker made an engraving of liger cubs born in 1824. [3] The parents and their three liger offspring are also depicted with their trainer in a 19th-century painting in the naïve style.

Two liger cubs born in 1837 were exhibited to King William IV and to his successor Queen Victoria. On 14 December 1900 and on 31 May 1901, Carl Hagenbeck wrote to zoologist James Cossar Ewart with details and photographs of ligers born at the Hagenbeck's Tierpark in Hamburg in 1897.

In Animal Life and the World of Nature (1902–1903), A. H. Bryden described Hagenbeck's "lion-tiger" hybrids:

It has remained for one of the most enterprising collectors and naturalists of our time, Mr. Carl Hagenbeck, not only to breed but to bring successfully to a healthy maturity, specimens of this rare alliance between those two great and formidable Felidae, the lion and tiger. The illustrations will indicate sufficiently how fortunate Mr. Hagenbeck has been in his efforts to produce these hybrids. The oldest and biggest of the animals shown is a hybrid born on the 11th May 1897. This fine beast, now more than five years old, equals and even excels in his proportions a well-grown lion, measuring as he does from nose tip to tail 10 ft 2 inches in length, and standing only three inches less than 4 ft at the shoulder. A good big lion will weigh about 400 lb [...] the hybrid in question, weighing as it does no less than 467 lb, is certainly the superior of the most well-grown lions, whether wild-bred or born in a menagerie. This animal shows faint striping and mottling, and, in its characteristics, exhibits strong traces of both its parents. It has a somewhat lion-like head, and the tail is more like that of a lion than of a tiger. On the other hand, it has no trace of mane. It is a huge and very powerful beast. [5]

In 1935, four ligers from two litters were reared in the Zoological Gardens of Bloemfontein, South Africa. Three of them, a male and two females, were still living in 1953. The male weighed 340 kg (750 lb) and stood a foot and a half (45 cm) taller than a full grown male lion at the shoulder.

In 1948, LIFE magazine pictured "Shasta," a liger conceived and born at the Hogle Zoo in Salt Lake City; its (future) parents had been rubbing noses through adjoining cage bars, and were permitted to cohabitate. The two-pound cub was "almost completely neglected by its mother, but the zoo's superintendent took it home and raised it, eventually returning it to the Zoo in a cage across from its parents' (separate) cages. [6]

Although ligers are more commonly found than tigons today, in At Home in the Zoo (1961), Gerald Iles wrote "For the record I must say that I have never seen a liger, a hybrid obtained by crossing a lion with a tigress. They seem to be even rarer than tigons." [7]

Appearance

Color plate of the offspring of a lion and tiger, Etienne Geoffroy Saint-Hilaire 1799-liger.jpg
Color plate of the offspring of a lion and tiger, Étienne Geoffroy Saint-Hilaire

The liger has a faint tiger-like striped pattern upon a lionesque tawny background. In addition, it may inherit rosettes from the lion parent (lion cubs are rosetted and some adults retain faint markings). These markings may be black, dark brown or sandy. The background color may be correspondingly tawny, sandy or golden. In common with tigers, as an example of countershading, the underparts are pale. The specific pattern and color depend upon which subspecies the parents were and how the genes interact in the offspring.

White tigers have been crossed with lions to produce "white" (actually pale golden) ligers. In theory, white tigers could be crossed with white lions to produce white, very pale or even stripeless ligers. There are no black ligers. Very few melanistic tigers have ever been recorded, most being due to excessive markings (pseudo-melanism or abundism) rather than true melanism; no reports of black lions have ever been substantiated. As blue or Maltese tigers probably no longer exist, gray or blue ligers are exceedingly improbable. It is not impossible for a liger to be white, but it is very rare. The first known white ligers were born in December 2013 at Myrtle Beach Safari in Myrtle Beach, South Carolina to a white male lion and a white female tiger. [8]

Size and growth

The liger is often believed to be the largest cat in the world. [1] Males reach a total length of 3 to 3.6 m (9.8 to 11.8 ft), [9] [10] which means that they rival even large male lions and tigers in length. [11] Imprinted genes may be a factor contributing to the large size of ligers. [12] These are genes that may or may not be expressed on the parent they are inherited from, and that occasionally play a role in issues of hybrid growth. For example, in some dog breed crosses, genes that are expressed only when maternally-inherited cause the young to grow larger than is typical for either parent breed. This growth is not seen in the paternal breeds, as such genes are normally "counteracted" by genes inherited from the female of the appropriate breed. [13]

Other big cat hybrids can reach similar sizes; the litigon, a rare hybrid of a male lion and a female tigon, is roughly the same size as the liger, with a male named Cubanacan (at the Alipore Zoo in India) reaching 363 kg (800 lb). [14] The extreme rarity of these second-generation hybrids may make it difficult to ascertain whether they are larger or smaller, on average, than the liger.

It is sometimes wrongly believed that ligers continue to grow throughout their lives because of hormonal issues. [15] It may be that they simply grow far more during their growing years and take longer to reach their full adult size. Further growth in shoulder height and body length is not seen in ligers over six years old, as in both lions and tigers. Male ligers also have the same levels of testosterone on average as an adult male lion, yet are azoospermic in accordance with Haldane's rule. In addition, female ligers may also attain great size, weighing approximately 320 kg (705 lb) and reaching 3.05 m (10 ft) long on average, and are often fertile. In contrast, pumapards (hybrids between pumas and leopards) tend to exhibit dwarfism.

Ligers are about the same size as the prehistoric Smilodon populator and American lion.

Records

Hercules the liger and his trainer Bhagavan Antle Ligertrainer.jpg
Hercules the liger and his trainer Bhagavan Antle

Hercules, the largest non-obese liger, is recognised by the Guinness Book of World Records as the largest living cat on Earth, weighing 418.2 kg (922 lb). [16] [17] Hercules was featured on the Today Show , Good Morning America , Anderson Cooper 360 , Inside Edition , and in a Maxim article in 2005, when he was only three years old and already weighed 408.25 kg (900.0 lb).

The Valley of the Kings Animal Sanctuary in Wisconsin had a male liger named Nook who weighed over 550 kg (1,213 lb). [2] [18]

To compare, the records for the lion and tiger in captivity are under 1,100 lb (500 kg). [19] [20]

Health and longevity

Though ligers typically have a life expectancy of between 13 and 18 years, they are occasionally known to live into their 20s. [21] A ligress named Shasta was born at the Hogle Zoo in Salt Lake City on 14 May 1948 and died in 1972 at age 24. [22] Nook, a liger at a facility in Wisconsin, died in 2007, at 21 years old. [2] [18] Hobbs, a male liger at the Sierra Safari Zoo in Reno, Nevada, lived to almost 15 years of age before succumbing to liver failure, and weighed 450 kg (990 lb). [23]

A liger at Novosibirsk Zoo NSK-ZOO-liger.jpg
A liger at Novosibirsk Zoo

Panthera hybrids tend to experience a higher rate of injury and neurological disorder than non-hybrids. Though not universal, ligers and tigons may develop health issues. Organ failure issues have been reported in ligers, in addition to neurological deficits, sterility, cancer, and arthritis. [24] [25] [26]

Fertility

Hercules the Liger at Miami's Jungle Island Liger Jungle Island.jpg
Hercules the Liger at Miami's Jungle Island

The fertility of hybrid big cat females is well-documented across a number of different hybrids. This is in accordance with Haldane's rule: in hybrids of animals whose sex is determined by sex chromosomes, if one of the two sexes is absent, rare or sterile, it will be the heterogametic sex. Male ligers are consequently sterile, while female ligers are not.

Ligers and tigons were long thought to be totally sterile. However, in 1943, a fifteen-year-old hybrid between a lion and an island tiger was successfully mated with a lion at the Munich Hellabrunn Zoo. The female cub, though of delicate health, was raised to adulthood. [27]

In September 2012, the Russian Novosibirsk Zoo announced the birth of a "liliger", the offspring of a liger mother and a lion father. The cub was named Kiara. [28]

Co-occurrence of parent species

As with the tigon, the liger exists only in captivity. Historically, the Asiatic lion and the Bengal tiger co-occurred in some Asian countries, and there are legends of male lions mating with tigresses in the wilderness, or of ligers existing there. [3] The two species' ranges are known to overlap in India's Gir National Park, though no ligers were known to live there until the modern era. [29] The range of the Caspian tiger has overlapped with that of the lion in places such as northern Iran and eastern Anatolia. [30]

Zoo policies

Liger face Liger portrait.jpg
Liger face

The United States holds the greatest population of around 30 ligers. China holds about 20 ligers. There are a few countries worldwide that hold a few, but it’s probable that fewer than 100 exist worldwide. [31]

The breeding of ligers and other Panthera hybrids has come under fire from animal rights activists and organisations, who argue that the health problems experienced by these animals makes their creation immoral. [32] [33] Despite these assertions of immorality, some unlicensed zoos still breed ligers for profit. [34]

See also

Related Research Articles

<span class="mw-page-title-main">Tiger</span> Large striped cat native to Asia

The tiger is a large cat and a member of the genus Panthera native to Asia. It has a powerful, muscular body with a large head and paws, a long tail and orange fur with black, mostly vertical stripes. It is traditionally classified into nine recent subspecies, though some recognise only two subspecies, mainland Asian tigers and the island tigers of the Sunda Islands.

<span class="mw-page-title-main">Leopard</span> Large spotted cat native to Africa and Asia

The leopard is one of the five extant cat species in the genus Panthera. It has a pale yellowish to dark golden fur with dark spots grouped in rosettes. Its body is slender and muscular reaching a length of 92–183 cm (36–72 in) with a 66–102 cm (26–40 in) long tail and a shoulder height of 60–70 cm (24–28 in). Males typically weigh 30.9–72 kg (68–159 lb), and females 20.5–43 kg (45–95 lb).

The term "big cat" is typically used to refer to any of the five living members of the genus Panthera, namely the tiger, lion, jaguar, leopard, and snow leopard, as well as the non-pantherine cheetah and cougar.

<span class="mw-page-title-main">Bengal tiger</span> Tiger population on the Indian subcontinent

The Bengal tiger or Royal Bengal tiger is a population of the Panthera tigris tigris subspecies and the nominate tiger subspecies. It ranks among the biggest wild cats alive today. It is estimated to have been present in the Indian subcontinent since the Late Pleistocene for about 12,000 to 16,500 years. Its historical range covered the Indus River valley until the early 19th century, almost all of India, western Pakistan, southern Nepal, Bangladesh, Bhutan and southwestern China. Today, it inhabits India, Bangladesh, Nepal, Bhutan, and southwestern China. It is threatened by poaching, habitat loss and habitat fragmentation.

A crossbreed is an organism with purebred parents of two different breeds, varieties, or populations. A domestic animal of unknown ancestry, where the breed status of only one parent or grandparent is known, may also be called a crossbreed though the term "mixed breed" is technically more accurate. Outcrossing is a type of crossbreeding used within a purebred breed to increase the genetic diversity within the breed, particularly when there is a need to avoid inbreeding.

<span class="mw-page-title-main">Congolese spotted lion</span> Hybrid carnivore

A Congolese spotted lion, also known by the portmanteau lijagulep, is the hybrid of a male lion and female jaguar-leopard hybrid. Several lijaguleps have been bred, but only one appears to have been exhibited as a Congolese spotted lion. It was most likely given that name by a showman because the public were more interested in exotic captured animals than in captive-bred hybrids.

<span class="mw-page-title-main">Golden tiger</span> Color variation of Tiger

A golden tiger, sometimes called a golden tabby tiger, is a Bengal tiger with a colour variation caused by a recessive gene. Like white tigers and black tigers, it is a morph, and not a separate subspecies. Known for its blonde or pale-golden color and red-brown stripes, the golden tiger colouring comes from a recessive trait referred to as "wideband" which affects the production of black during the hair growth cycle. Tiger colorations that vary from the typical orange-with-black-stripe do occur in nature, but in a very small percentage.

<span class="mw-page-title-main">Pumapard</span> Hybrid between a leopard and a cougar

A pumapard is a hybrid of a cougar and a leopard. Both male cougar with female leopard and male leopard with female cougar pairings have produced offspring. In general, these hybrids have exhibited a tendency to dwarfism.

A Panthera hybrid is a crossbreed between individuals of any of the five species of the genus Panthera: the tiger, lion, jaguar, leopard, and snow leopard. Most hybrids would not be perpetuated in the wild as the territories of the parental species do not overlap and the males are usually infertile. Mitochondrial genome research revealed that wild hybrids were also present in ancient times. The mitochondrial genomes of the snow leopard and the lion were more similar to each other than to other Panthera species, indicating that at some point in their history, the female hybrid progeny of male ancestors of modern snow leopards and female ancestors of modern lions interbred with male ancestors of modern snow leopards.

<span class="mw-page-title-main">Felid hybrids</span> Hybrid carnivore

A felid hybrid is any of a number of hybrids between various species of the cat family, Felidae. This article deals with hybrids between the species of the subfamily Felinae.

<span class="mw-page-title-main">Rosette (zoology)</span> Rose-like markings on fur and skin

A rosette is a rose-like marking or formation found on the fur and skin of some animals, particularly cats. Rosettes are used to camouflage the animal, either as a defense mechanism or as a stalking tool. Predators use their rosettes to simulate the different shifting of shadows and shade, helping the animals to remain hidden from their prey. Rosettes can be grouped in clusters around other spots, or may appear as blotches on the fur.

<span class="mw-page-title-main">Nandankanan Zoological Park</span> Zoo and botanical garden in Odisha, India

Nandankanan Zoological Park is a 437-hectare (1,080-acre) zoo and botanical garden located in Baranga village, Odisha, India. It is 10 km to south of Cuttack and 10 km north of Bhubaneswar. Established in 1960, it was opened to the public in 1979 and became the first zoo in India to join World Association of Zoos and Aquariums (WAZA) in 2009. It also contains a botanical garden and part of it has been declared a sanctuary. Nandankanan, literally meaning The Garden of Heaven, is located in the environs of the Chandaka forest, and includes the 134-acre (54 ha) Kanjia lake.

<span class="mw-page-title-main">Hybrid speciation</span> Form of speciation involving hybridization between two different species

Hybrid speciation is a form of speciation where hybridization between two different species leads to a new species, reproductively isolated from the parent species. Previously, reproductive isolation between two species and their parents was thought to be particularly difficult to achieve, and thus hybrid species were thought to be very rare. With DNA analysis becoming more accessible in the 1990s, hybrid speciation has been shown to be a somewhat common phenomenon, particularly in plants. In botanical nomenclature, a hybrid species is also called a nothospecies. Hybrid species are by their nature polyphyletic.

<span class="mw-page-title-main">White tiger</span> Tiger morph

The white tiger, or bleached tiger, is a leucistic morph of the tiger. It is reported in the wild from time to time in the Indian states of Madhya Pradesh, Assam, West Bengal, Bihar, Odisha, in the Sunderbans region and especially in the former State of Rewa. It has the typical black stripes of a tiger, but its coat is otherwise white or near-white, and it has blue eyes.

<span class="mw-page-title-main">Zoological Garden, Alipore</span> Zoo in Kolkata, India

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<span class="mw-page-title-main">Tigon</span> Tiger and lioness hybrid

The tigon is a hybrid offspring of a male tiger and a female lion, or lioness. They exhibit visible characteristics from both parents: they can have both spots from the mother and stripes from the father. Any mane that a male tigon may have will appear shorter and less noticeable than a lion's mane and is closer in type to the ruff of a male tiger.

Sterility is the physiological inability to effect sexual reproduction in a living thing, members of whose kind have been produced sexually. Sterility has a wide range of causes. It may be an inherited trait, as in the mule; or it may be acquired from the environment, for example through physical injury or disease, or by exposure to radiation.

<span class="mw-page-title-main">Liliger</span> Hybrid carnivore

The liliger is the hybrid offspring of a male lion and a female liger. Thus, it is a second generation hybrid. In accordance with Haldane's rule, male tigons and ligers are sterile, but female ligers and tigons can produce cubs. The first such hybrid was born in 1943, at the Hellabrunn Zoo.

References

  1. 1 2 3 "Liger cubs nursed by dog in China's Xixiakou Zoo". BBC News Asia-Pacific. 24 May 2011. Retrieved 25 May 2011.
  2. 1 2 3 4 ligerfacts.org. "The Liger – Meet the World's Largest Cat" . Retrieved 17 July 2016.
  3. 1 2 3 Ligers. messybeast.com. Retrieved 4 September 2012.
  4. ↑ "When the sire is a lion the result is termed a Liger, whilst the converse is a Tigon." Edward George Boulenger, World Natural History, B. T. Batsford ltd., 1937, p. 40.
  5. ↑ Bryden, A.H. (contributor). "Animal Life and the World of Nature" (1902–1903, bound partwork).
  6. ↑ "Liger." LIFE, 20 September 1948, 109.
  7. ↑ Iles, G. At Home in the Zoo (1961).
  8. ↑ "First white ligers". Guinness World Records . Retrieved 5 December 2019.
  9. ↑ Description of ligers at Bestiarium.kryptozoologie.net
  10. ↑ Description of ligers at Lairweb.org.nz
  11. ↑ Vratislav Mazák: Der Tiger. Westarp Wissenschaften; Auflage: 5 (April 2004), unveränd. Aufl. von 1983 ISBN   3-89432-759-6
  12. ↑ "Growth dysplasia in hybrid big cats" . Retrieved 23 June 2006.
  13. ↑ Howard Hughes Medical Institute (30 April 2000). "HHMI News: Gene Tug-of-War Leads to Distinct Species" . Retrieved 23 June 2006.
  14. ↑ "Tigon". messybeast.com. Retrieved 21 July 2010.
  15. ↑ "Liger". sodredge.tripod.com. Retrieved 21 February 2020.
  16. ↑ "Largest living cat". Guinness World Records. 2022. Retrieved 10 September 2022.
  17. ↑ "Hercules, 922-Pound Liger, Is The World's Largest Living Cat (PHOTOS)". The Huffington Post . Retrieved 31 January 2015.
  18. 1 2 "Liger Nook - Liger Profile". Liger World. Retrieved 23 April 2018.
  19. ↑ Wood, G. L. (1983). The Guinness Book of Animal Facts and Feats . Sterling Publishing. ISBN   978-0-85112-235-9.
  20. ↑ "The Nineteenth Century and After". Vol. 130. Leonard Scott Publishing Company. 1941. Retrieved 17 March 2018.
  21. ↑ "Liger: Recorded Ages of the Ligers". Ligerworld.com. Retrieved 10 December 2013.
  22. ↑ Twila Van Leer (21 January 1996). "BABY LIGER BROUGHT NEW LIFE TO STRUGGLING ZOO". Deseret News . Archived from the original on 3 February 2015. Retrieved 1 February 2015.
  23. ↑ "Largest cat hybrid". Guinness World Records. 2004. Retrieved 15 January 2022.
  24. ↑ Lauren Frantz (14 December 2013). "Ligers, Tigons, and Hybrids, Oh My!". Crown Ridge Tigers. Retrieved 15 January 2022.
  25. ↑ "Tigers – what's the reality for these big cat hybrids?". The Wildcat Sanctuary. 31 January 2017. Retrieved 15 January 2022.
  26. ↑ "This Is Why Ligers, Tigons, and Other 'Frankencats' Shouldn't Be Bred". 19 May 2017. Retrieved 24 October 2019.
  27. ↑ Guggisberg, C. A. W. Wild Cats of the World (1975).
  28. ↑ Katia Andreassi (21 September 2012). ""Liliger" Born in Russia No Boon for Big Cats". National Geographic. Archived from the original on 24 September 2012.
  29. ↑ "Cat Experts: Ligers and Other Designer Hybrids Pointless and Unethical". National Geographic News. 24 February 2017. Retrieved 17 September 2020.[ dead link ]
  30. ↑ Heptner, V. G.; Sludskij, A. A. (1992) [1972]. Mlekopitajuščie Sovetskogo Soiuza. Moskva: Vysšaia Škola [Mammals of the Soviet Union. Volume II, Part 2. Carnivora (Hyaenas and Cats)]. Washington DC: Smithsonian Institution and the National Science Foundation. pp. 82–202.
  31. ↑ "The confusing world of the Liger". wildlifewaystation.org. Archived from the original on 1 March 2019. Retrieved 28 February 2019.
  32. ↑ "Analysis: The thorny ethics of hybrid animals". PBS . 27 October 2017. Retrieved 24 October 2019.
  33. ↑ "Liger" . Retrieved 24 October 2019.
  34. ↑ "Liger Facts". Big Cat Rescue. 7 February 2019. Retrieved 31 August 2020.

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