The world's stocks of seafood will have collapsed by 2050 at present rates of destruction by fishing, scientists said yesterday.A four-year study of 7,800 marine species around the world's ecosystems has concluded that the long-term trend is clear and predictable. If the rate of over-fishing continues, the world's currently fished seafoods will have reached what is defined as collapse by 2048 By 2048, to be exact, catches of all the presently fished seafoods will have declined on average by more than 90 per cent since 1950.The study, by an international group of ecologists and economists, says the loss of...