What is a Liger

Liger Photo

The liger is a cat born from the breeding of a male lion and a female tiger. This combination produces an offspring with more lionistic features than if the reverse pairing had occured. That would produce a more tigeristic creature known as a tigon. Both are members of genus Panthera.There is no scientific name assigned to this animal because of it’s human assisted ancestory.

A liger looks like a giant lion with muted stripes but like thier tiger ancestors, ligers like swimming. This goes against the nature of a lion but is what makes creature special. It gets the best of both parents. That is not always the case though with crossbreeds. Sometimes the results go the other way and the animal gets theworst of both parents. That would suck! Enjoy the site and I hope you fall in love with the liger, even if you don’t agree with the science… remember it’s not the liger’s fault.

Tigon Video #1 - Tigon Cubs

Liger Video #4 - Liger Eating

Liger Video #3 - Liger Ancestory

Liger Video #2 - Liger Cub in Russia

Examples of Hybrid Animals

  • Dog hybrids are crosses between different breeds and are often bred selectively.
  • Hybrid Iguana is single cross hybrid, result of natural inbreeding from male marine iguana and female land Iguana since late 2000s.
  • Equid hybrids
    • Mule, a cross of female horse and a male donkey.
    • Hinny, a cross between a female donkey and a male horse. Mule and Hinny are examples of reciprocal hybrids.
    • Zebroids
      • Zeedonk or Zonkey, a zebra/donkey cross.
      • Zorse, a zebra/horse cross
      • Zony or Zetland, a zebra/pony cross (”zony” is a generic term; “zetland” is specifically a hybrid of the Shetland pony breed with a zebra)
  • Bovid hybrids
    • Dzo, zo or yakow; a cross between a domestic cow/bull and a yak.
    • Beefalo, a cross of an American Bison and a domestic cow. This is a fertile breed; this along with genetic evidence has caused them to be recently reclassified into the same genus, Bos.
    • Zubron, a hybrid between Wisent (European Bison) and domestic cow.
  • Sheep-goat hybrids, such as the The Toast of Botswana.
  • Ursid hybrids, such as the Grizzly-polar bear hybrid, occur between black bears, brown bears, Kodiak and polar bears.
  • Felid hybrids
    • Savannah cats are the hybrid cross between an African serval cat and a Domestic cat
    • A hybrid between a Bengal tiger and a Siberian tiger is an example of an intra-specific hybrid.
    • Ligers and Tigons (crosses between a Lion and a Tiger) and other Panthera hybrids such as the Lijagulep. Various other wild cat crosses are known involving the Lynx, Bobcat, Leopard, Serval, etc.
    • Bengal cat, a cross between the Asian Leopard cat and the domestic cat, one of many hybrids between the domestic cat and wild cat species. The domestic cat, African wild cat and European wildcat may be considered variant populations of the same species (Felis silvestris), making such crosses non-hybrids.
  • Fertile Canid hybrids occur between coyotes, wolves, dingoes, jackals and domestic dogs.
  • Hybrids between Black Rhinos & White Rhinos have been recognized.
  • Hybrids between spotted owls and barred owls
  • Cama, a cross between a Camel and a Llama, also an intergeneric hybrid.
  • Wolphin, a fertile but very rare cross between a False Killer Whale and a Bottlenose Dolphin.
  • A fertile cross between an albino King Snake and an albino Corn Snake.
  • The Wurdmann’s heron, a cross of the white heron and the great blue heron.
  • At Chester Zoo in the United Kingdom, a cross between African elephant (male) and Asian elephant (female). The male calf was named Motty. It died of gut infection after twelve days.
  • Cagebird breeders sometimes breed hybrids between species of finch, such as Goldfinch x Canary. These birds are known as Mules.
  • Gamebird hybrids, hybrids between gamebirds and domestic fowl, including Chickens, Guineafowl and Peafowl, interfamilial hybrids.
  • Numerous Macaw hybrids are also known.
  • Red Kite x Black Kite: 5 bred unintentionally at a falconry center in England. (It is reported that the black kite (the male) refused female black kites but mated with two female red kites.)
  • Hybridization between the endemic Cuban Crocodile (Crocodilus rhombifer) and the widely distributed American Crocodile (Crocodilus acutus) is causing conservation problems for the former species as a threat to is genetic integrity. [2]
  • Blood parrot cichlid, which is probably created by crossing a Gold Severum and a Midas Cichlid or Red Devil Cichlid
  • From Wikipedia

Who Breed The First Ligers?

The history of these hybrids has been very carefully worked out by Professor Valentine Bail, Director of the Science and Art Museum, Dublin, from whose papers the following account is taken. The parents of these hybrids were in a travelling menagerie owned at first by Mr. Thomas Atkins, and subsequently by his son Mr. John Atkins; and a total of six litters of hybrids were produced between the years 1824 and 1833. The parent Lion was bred in the menagerie from a Barbary Lion and a Senegal Lioness; while the Tigress was born in the collection of the Marquis of Hastings at Calcutta, and was purchased when about eighteen months old from a ship’s captain, to whom she had been given by her original owner. Being of the same age as the Lion, she was placed with him in the same cage ; and in the course of two years proved to be in cub. The following is a record of the six litters produced by the union of this pair.

First Litter: Born October the 24th, 1824, at Windsor, and comprising two males and a female. They were nourished by a female terrier, but all perished within a year of their birth. These cubs were exhibited to King George the Fourth, at the Royal Cottage, Windsor, on the final of November, by whom they were christened Lion-Tigers.

Second Litter: Born April 22nd, 1825, at Clapham Common; there were three cubs, sexes not recorded. Reared by the mother, as also were all the subsequent litters. They only lived a short time.

Third Litter: Born December 31st, 1826 or 1827, at Edinburgh; one male and two females . Mr. Ball states that the year is given as 1827 in the handbill of the menagerie from which he quotes, and the other references seem to support that date; but Mr. John Atkins says it is given as 1826 in a printed catalogue in his possession. These only lived a few months. The skin of one of them, forming the subject of Plate III,, is preserved in the Science and Art Museum at Edinburgh, and a second is in the British Museum. Sir William Jardine remarks that “the colour was brighter than that of the Lion, and the bands were better marked than they generally are in the young of tire true breed.” Indeed, from his figure, the animal has more the appearance of a Tiger than of a Lion. Writing of the cubs of the first litter in the “Library of Entertaining Knowledge,” where one of them was figured, Griffith observes that “our mules, in common with ordinary Lions, were born without any traces of a mane, or of a tuft at the end of the tail. Their fur in general was rather woolly; the external ear was pendant towards the extremity; the nails were constantly out, and not cased in the sheath, and in these particulars they agreed with the common cubs of Lions. Their colour was dirty yellow or blanket-colour; but from the nose over the head, along the back and upper side of the tail, the colour was much darker, and on these parts the transverse stripes were stronger, and the forehead was covered with obscure spots, slighter indications of which also appeared on other parts of the body. The shape of the head, as appears by the figures, is assimilated to that of the father (the Lion) ; the superficies of the body on the other hand is like that of the Tigress.”

Fourth Litter: Born October 2nd, 1828, at Windsor; one male and two females.

Fifth Litter: Born May, 1831, at Kensington, three cubs, sexes not recorded. They were shown to the Queen, then Princess Victoria, and to the Duchess of Kent. The whole group performed in a specially constructed cage at Astley’s Amphitheatre, and in 1832 were taken by Mr. Atkins for a tour in Ireland

Sixth Litter: Born July 19th, 1833, at the Zoological Gardens, Liverpool; one male and two females. One, the male, lived for ten years in the Gardens. The young male Lion-Tigers when about three years old had a short mane, something like that of an Asiatic Lion; and the stripes became very indistinct at that age.

Textual content is licensed under the GFDL from messybeast.com

Why Are Ligers Bigger Than Tigons

The large size of the liger and small size of the tigon is due to “genomic imprinting” - the unequal expression of genes depending on parent of origin i.e. whether certain growth genes are inherited from the male or the female. This is linked to the species’ lifestyle and breeding strategy - whether the female mates with only one male while in heat (non-competitive) or whether she mates with many males (competitive). This results in “growth dysplasia”. The following explanation is greatly simplified as a number of other genes are contributed unequally by the male and female parents and also affect the general health and longevity of the offspring. Lions live in prides led by several adult males. The lionesses mate with each of those males. Each male wants his offspring to be the ones to survive, but the female’s genes want multiple offspring to survive. The father’s genes promote size of the offspring to ensure that his offspring out-compete any other offspring in the womb at the same time. Genes from the female inhibit growth to ensure that as many offspring as possible survive and that they all have an equal chance. By contrast, tigers are largely solitary and a female on heat normally only mates with one male. There is no competition for space in the womb so the male tiger’s genes do not need to promote larger offspring. There is therefore no need for the female to compensate, so the offspring’s growth goes uninhibited.

When a male tiger mates with a lioness, his genes are not promoting large growth of the offspring because he is adapted to a non-competitive breeding strategy. However, the lioness is adapted to a competitive strategy and her genes inhibit the growth of the offspring. This uneven match means that the offspring (tigons) are often smaller and less robust than either parent.

When a male lion mates with a tigress, his genes promote large offspring because lions are adapted to a competitive breeding strategy. The tigress does not inhibit the growth because she is adapted to a non-competitive strategy. Therefore the offspring (liger) grows larger and stronger than either parent because the effects do not cancel each other out. Ligers take several years to reach full adult size, but it is a myth that ligers never stop growing.

Growth dysplasia has other effects: the size of the placenta may be affected (causing miscarriage), the embryo may be aborted at an early stage due to abnormal growth, the cub may be stillborn or may only survive a few days. In some rodents, mating Species A males with Species B females produces offspring half normal size, but mating Species B males with Species A females cause the offspring to be aborted as they try to grow to several times the normal size.

Because of the impossibility of a gene being inherited from only females, there is a competing hypothesis. This hypothesis (allthough not tested) is that the Lion’s sperm is damaged somehow during fertilization and that a growth inhibiting gene is typically destroyed. It is impossible for a gene carried on a chromosomes to be passed along only from the mother. The reason for this is there are no chromosomes that only a female can have. Female Tigons and Female Ligers both possess a tiger X chromosme and a lion X chromosome, yet only the female Ligers will grow large, this means something must happen to either alter the genes or that the cause of the growth dysplasia lies at least partially outside of the genes.

Another possible hypothesis is that the growth dysplasia results from the interaction between lion genes and tiger womb enviroment. The tiger produces a hormone that sets the fetal Liger on a pattern of growth that does not end throughout his life. The hormonal hypothesis is that the cause of the male Liger’s growth is his sterility - essentially, the male liger remains in the pre-pubertal growth phase. This is not upheld by behavioural evidence - despite being sterile, many male ligers become sexually mature and mate with females. In addition, female ligers also attain great size but are fertile.

Textual content is licensed under the GFDL

Liger Video #1

Liger Science

REFERENCES AND FURTHER READING

Historical accounts of ligers and tigons (chronological order):

CJ Cornish et al (undated), R De Davison (1863), K Ackermann (1898), A Rörig (1903), Deutshe Landwirtshaftliche Presse (1904), Boettger (1906), T Noack (1908), A Sokolowsky (1909), H Przibram (1910), SS Flower (1929), L Reisinger (1929), Sir PC Mitchell (1930), H Heck (1932), RI Pocock (1935), CWG Eifrig (1937), WA Craft (1938), L Heck (1941), VG Stefko and VP Narskii (1946), American Fur Breeder (1948), Illustrated (1948), H Pilcher (1948), B Grzimek (1949), A Urbain and J Rinjard (1950), Leyhausen (1950), C Hagenbeck (1951), O Antonius (1951), H Petzsch (1951, 1956), M Burton (1952), A Kemner (1953), Farmer’s Weekly Bloemfontein (1953), F Petter (1955), H Hemmer (1966, 1968), International Zoo Yearbook (1970, 1971)


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