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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.But after 1996, few undiscovered fisheries were left and catches started to decline.And then there is climate change and ocean acidification which threaten to flood nesting sites and disrupt food sources.Seabirds are about twice as likely as land-based birds to be threatened with extinction.Currently, only 2% of the world's oceans are under some form of protection and less than half of those ban fishing altogether.In contrast, nearly 15% of the world's terrestrial landscape is protected.
We know how to fix this problem but whether we do it or not depends on conditions that are difficult." A 2015 study showed nearly 500 Chinese fishing vessels operating off west Africa, with scores of cases of illegal fishing, according to Greenpeace.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.Carbon dioxide pollution is also being absorbed by the ocean, causing its chemistry to change and become more acidic.This spells trouble for marine animals that are now having difficulty building shells, growing and sometimes even surviving in increasingly corrosive waters.