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Crocodiles Turn to Rubber in South Africa

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Kruger's the little yellow part in the top right of the map.

Kruger's the little yellow part in the top right of the map.

Setting: Kruger National Park Wildlife Reserve, South Africa along the Mozambique border

Three dead crocodiles were found within the park. The victims suffered a painful death. The fat within their bodies hardened into a rubber-like state. The victims were rendered powerless to move. The crocodiles could not move to eat or drink, and soon they died of either starvation, thirst or exposure.

That was last May. Now, over 170 crocodiles have perished in much the same way within Kruger National Park, a showcase national park that hosts a good number of top predators like lions and leopards in addition to other large mammals like elephants, hippos and rhinos.

black-rhino-and-baby-pretoriuskop

The science has come back on what is killing these huge crocs, the Nile variety of crocodile. Pansteatitis or “Yellow Fat Disease” is not a pretty disease and it affects other animals as well as the crocodiles. Domestic cats have been found to suffer from the disease, and also birds and fresh water turtles may become afflicted with this mysterious disease.

The condition attacks fat stores, depleting anti-oxidants and inflaming the fat in a process that scientists believe is very painful.

“There was a big concern that other species could be affected,” Jan Myburgh, veterinarian specialising in toxicology, told AFP.

The chief worry was for lions — seen feeding on the dead crocodiles — and other cat species, based on the susceptibility of domestic cats, but no dead or sick felines have been found, he said.– TerraDaily

The real problem is that no one can figure out how or why this disease strikes. Most of the scientists working on the case (as well as similar cases over the years) are pointing to strained river resources in the area. The rivers within the Park include the Olifants, the Timbavati, and the Sabie.

The Kruger deaths occurred in a remote gorge which has faced increased siltation from a dam in neighbouring Mozambique, and is fed by one of South Africa’s hardest working rivers which supports various heavy industries.

Clues are now being sought by a multi-pronged programme looking at the entire river system to get a better understanding of the cause and effect links around the deaths.

crocmx8So, this could be any number of reasons that these Nile crocodiles, which can grow up to 5 meters or 15 feet long and weigh up to 500 pounds, are dying off in such a disturbing way. Not enough fresh water, warmer water, polluted water, diseases spreading in from upriver, a decline in the general health of big carnivores or scavengers willing to eat their own kind.

Disturbing all the same.

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Welcome to Daily Science Dose, an eclectic collection of meditations and explorations in science, particularly medicine and biology. Here are some of the things Iʼm into: zoology, bird flu and other communicable diseases, marine life (especially invertebrates), brains, and sexual patterns of behavior, both human and non-human. What are you into? Is there something youʼve always wondered about? Drop me a line or leave a comment, and Iʼll see what I can find for you. Together weʼll discover many odd and exciting new facts about the world and the various creatures ambling about, as well as the various creatures ambling about within those creatures. And so on and so on and on and on. Super fun!"

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