Excerpts from an
Encyclopedia Britannica story:
We respond intensely to the bold orange-and-black felines, and sometimes even more so to the almost mystical white tiger. Their ghostly white appearance and searing blue eyes are difficult to ignore. Because we are fascinated with things we consider to be rare–like gold–we value the white tiger for its rarity, and find a ready rationalization for perpetuating its existence...
But if there is any issue for which the white tiger is a poster child, it is our faulty understanding of conservation. The headlines are all too familiar: this zoo or that performer is breeding white tigers to save them from extinction and restore them to their native habitats... The truth is difficult for many people to accept. White tigers are not a species and do not have a native habitat. Tigers do not inhabit any section of the globe in which it would be advantageous for their survival to be white...
What we call the “royal” white tiger is in fact a genetic anomaly, caused by a double recessive gene occurring so rarely in nature that experts estimate that only one in every 10,000 tigers born in the wild is white. This anomaly, called “leucism,” prevents the pigment from coloring the skin and fur and, more importantly, robs the animal of a main tool for survival—camouflage... “when a deleterious recessive genetic mutation randomly occurs that is disadvantageous for the survival of the animal, such as white color in a tropical jungle environment, the animal does not survive to pass on that genetic mutation or disadvantageous characteristic to its offspring" (italics added). In other words, cruel as it may sound, nature does not provide a place for the white tiger...
If nature is designed to prevent the survival of genetic mutations that are a danger to the survival of an entire species, then why do we see white tigers in zoos and circuses across the United States? The answer is simple: they are produced by inbreeding. In an essay published on the Web site of Save the Tiger Fund, Ron Tilson, conservation director of the Minnesota Zoo, writes: “to produce white tigers or any other phenotypic curiosity, directors of zoos and facilities must continuously inbreed, father to daughter, to granddaughter, and so on.”..
And there is a price to be paid for it. White tigers endure a host of health problems about which the public is largely unaware, including immune system deficiencies that cause many to live miserable and short lives, scoliosis of the spine, hip dysplasia, neurological disorders, cleft palates, and protruding, bulging eyes. Many are stillborn and many more turn out to be too deformed to display...
The trade in white tigers is lucrative. White tiger cubs have fetched as much as $60,000 a piece. According to Tilson, “white tigers are an aberration artificially bred and proliferated by a few zoos, private breeders, and circus folks, who do this for economic rather than conservation reasons.”
More at the link, via
Reddit, where "teacup dogs" are also discussed (I'll try to blog that later). Photo credits to Big Cat Rescue.
ليست هناك تعليقات:
إرسال تعليق