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With so little of the ocean closed to fisheries - less than 1% - it's hardly shocking that many seabirds are suffering from overfishing.Hammill said the "most pressing issue" is plastic pollution.Without swift, national action to protect the ocean's vast diversity of life from acidifying waters corals, shellfish, salmon and a whole host of beautiful creatures will be lost.We need your help to ask President Barack Obama and the Environmental Protection Agency to get working on a bold plan to curb ocean acidification.A paper released last month found that 90% of the world's seabirds likely have plastic in their stomachs.Seabirds continually mistake plastic for fish eggs, devouring large amounts.The decline since 1996 has largely been in fish caught by industrial fleets and to a lesser extent a cut in the number of unwanted fish discarded at sea."The fact that we catch far more than we thought is, if you like, a more positive thing," he said.
Official catch data from FAO rarely includes small-scale, sport or illegal fishing and does not count fish discarded at sea.
Illegal and pirate fishing take place in many parts of the world.
Prof Callum Roberts, at the University of York in the UK and not part of Pauly's team, said: "We can see more clearly now, for example, the immense value of fish to poor people in developing countries," he said.
It gives us an idea of the overall impact we're having." There are nearly 350 species of seabirds worldwide.
Living on both the open ocean and the shoreline, they face overfishing, drowning in fishing lines or nets, plastic pollution, invasive species like rats in nesting areas, oil and gas development and toxic pollution moving up the food chain.
While the results necessarily remain uncertain, they undoubtedly represent our most complete picture yet of the global state of fish catches." Worm said the world's fisheries were being over-exploited but that some stocks were being sustainably managed: "Where such measures have been taken, we find that both fish and fishermen are more likely to persist into the future." Global fish catches rose from the 1950s to 1996 as fishing fleets expanded and discovered new fish stocks to exploit.