By Jackson Landers|Posted Thursday, Dec. 13, 2012, at 11:04 AM ET
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A white tiger from the Cincinnati Zoo.
Photo by Jim Larimore.
A white tiger is a striking creature. Tigers are always impressive animals, but when you take away the orange, the result is a big cat that looks like a phantom out of a dream. They seem almost magical, and yet I firmly believe that the world would be a better place if there was not a single white tiger in it.
There are only about 4,000 tigers, at most, remaining in the wild. Yet there are probably tens of thousands of captive tigers around the world (there is no official census). This would appear to make a compelling case for the existence of zoos and private collections. If tigers can survive and breed well in captivity, then perhaps more can be introduced to the wild when safe habitat becomes available. Yet that system isn’t working the way we think it does. A huge number of the captive tigers are hybrids of various subspecies and are so inbred that they will never be suitable for reintroduction to the wild. No tigers are more emblematic of this problem than white tigers.
I recently asked friends on Facebook to write down their thoughts about white tigers without searching for any new information. Some very intelligent people were under the impression that white tigers are a variety of Siberian tiger, camouflaged for a snowy climate. Others applauded zoos with white tigers for supporting conservation of white tigers while lamenting a lag in reintroduction efforts. Only one out of 27 respondents knew that white tigers are not a subspecies at all but rather the result of a mutant gene that has been artificially selected through massive inbreeding to produce oddball animals for human entertainment.
This level of misinformation should not come as a surprise. Many of the venues that display white tigers have a long history of shading the truth about their mutants. The Cincinnati Zoo, an otherwise respectable institution, labels their white tigers as a “species at risk!” Nowhere on the zoo’s website or at its tiger enclosures does it point out that this species at risk is in fact an ecologically useless hybrid of Bengal and Siberian strains, inbred at the zoo’s own facility for big money. The Cincinnati Zoo repeatedly bred closely related animals over the past few decades to produce more of the white tigers, which they sold for around $60,000 each.
One of the Cincinnati Zoo’s biggest sales was to the illusionists Siegfried and Roy. The Vegas duo bought three white tigers from the zoo in the early 1980s (along with stock from other sources) and quickly set up their own breeding program. Incorporating the white tigers into their act, Siegfried and Roy introduced the breed to millions of Americans. They referred to the cats as “royal white tigers” and, out of what was probably a good intention, gave the public the impression that this was an endangered species that they were helping to protect. Their famous Las Vegas show ended in 2003 when Roy Horn was mauled on stage in front of a horrified audience by one of his own white tigers. To date, Siegfried and Roy continue to claim on their website that their white tiger breeding program is part of a conservation effort aimed at saving “an endangered species.”
White tigers are white because they have two copies of an extremely rare recessive gene found in Bengal tigers (the gene has never been seen among pure Siberians or other subspecies). A very few white tigers were seen in the wild in the early 20th century. On the face of it, being a white object in the Bengal tigers’ tropical habitat of India and Southeast Asia can’t be good for a predator that needs to be camouflaged.
Other, more subtle problems that go along with the white coat would also prevent white tigers from ever becoming established as a wild population. The mutation (which is not albinism—white tigers can still produce melanin) also causes serious defects. White tigers in captivity tend to have problems with the way that their brains control their eyes and process visual stimulation. The animals are often cross-eyed in one or both eyes, bump into objects, and have trouble understanding spatial relationships when they are young. Animals with defects like these couldn’t survive for long in the wild, even though they have long lives in captivity. Other disorders, such as kidney problems, club feet, and shortened tendons, come from the severe inbreeding required to keep this recessive gene around.
