Translated press release from Stuttgart's website:
Polar Bear Anton died swallowed visitors Jacket
On the night of Monday, the polar bear Anton died in the Wilhelma. Cause of death was a foreign body. Found swallowed parts of a jacket or bag, which was probably like a visitor from carelessness into the enclosure. Anton was 25 years old.
Wild animals tend to hide very long suffering and diseases, since any sign of weakness in the wild will be immediately exploited by enemies. The fact that something was wrong with Anton, was in any case only seen when he behaved strangely and began to vomit pieces of tissue. Veterinarian and zookeeper administered to him then immediately laxatives, which he finally retired other parts of the foreign body. Apparently, however, not all, Anton finally died of severe intestinal injury and inflammation, as early research Veterinäruntersuchungsamt on Monday morning revealed. Why the polar bear has ever eaten the bag including jacket, rather than just break down, as he has already done with other found objects in his enclosure, also the keepers is a mystery. "It must have been something very delicious is the Anton could not resist," suggests his nurse Woessner Andreas and Jürgen Deisenhofer.
Unfortunately, it is not uncommon in zoos, and in the Wilhelma not mean that visitors can accidentally or carelessly drop items in ponds and enclosures. When the polar bear, an electric fence has to a large part of the enclosure discs can not prevent in the past 20 years, about 200 children's shoes in the water landed, as well as around 50 pacifiers per year, countless hats, cameras, cell phones and eyeglasses. Only if the owner or observer in time the incident or loss report, there is a chance to remove especially the larger objects in time. "If we had known that something was in the pen, we had Anton might be able to save even more," said veterinarian Tobias Knauf Witzens. "Because then you would possibly an emetic nor can bring the remaining parts to the fore. We ask visitors urgently to pay very well for their things to not throw anything into the enclosure and to report any loss immediately. "
One thing is certain: Anton is not the first victim of foreign bodies in enclosures that end up here at the end in the animals' stomachs. Many years ago Hippo Egon died of a bowel obstruction caused by a tennis ball, and also the last elephant seal Wilhelma, Charly, cost a swallowed stuffed animal life. Without the incident with the jacket Anton could still live a good ten to 15 years. He was born on 13.12.1989 in Karlsruhe Zoo and was drafted in 1992 along with three other young female polar bears in the newly opened facility for Bears and Mountain Animals Wilhelma. In 2007, he and the polar bear Corinna's parents Wilbär who lives in Orsa Park in Sweden today.