Police have named the man who died at a Hobart beach from a suspected stingray puncture wound, while an expert in the marine species has urged calm despite increased numbers of the animals in Tasmanian waters. Nicolas Ricketts, 42, died from cardiac arrest on Saturday shortly after he sustained the injury to his lower abdomen, believed to have been inflicted by a stingray, while swimming at Lauderdale, east of Hobart. Friends and family of Mr Ricketts, known widely as "Ned" who worked as a plumber and had served with the Australian Navy, gathered at the spot where he died yesterday....