CNN iReport

A new study has revealed that stingray at a tourist hotspot in the Cayman Islands are suffering because of all the human attention. The Grand Cayman sandbank, dubbed Stingray City, is regularly swamped with up to 2,500 visitors at a time, most of whom have paid handsomely for the chance to feed, stroke and swim with the creatures.

The study highlights the risks to animals posed by the growing "wildlife tourism" industry. Experts say wild populations of creatures such as dolphins, penguins and sharks are also affected by increased contact with curious people.

The study was one of the first to investigate direct effects on the physiology of animals involved in such tourism. Blood tests showed that the stingrays at Stingray City had weaker immune systems and were in poorer health than animals not disturbed by tourists, perhaps making them more vulnerable to disease and storms.

The experts warn that the "long-term health and survival of tourist stingrays have a significant probability of being affected" and they call for tighter regulation of the industry. Similar crowded tourist sites across the world will be doing similar damage to stingray, they say.

Christina Semeniuk, an ecologist at Simon Fraser University in Canada, who led the research, said: "Our study is the first to definitively show negative physiological impacts that indicate long-term costs to the animals' health."

article/image:guardian