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The Marine Environment is under increasing pressure from fisheries, pollution, mineral extraction and climate change.
20% of the world catches are taken from stocks for which there is not sufficient information to assess their state of exploitation.
Man has now depleted fish poplutaion and altered oceanic ecosystems over vast regions. Large oxygen depleted dead zones are appearing in the open ocean, toxic algal blooms are resulting in dead zones in productive inshore waters and contaminating shellfish, Toxic 'stinking' fish are being caught in the arctic.
International regulations are difficult to enforce and ecomonic issues , not scientific management , continue to drive the industry. This must change if sustainable management of the worlds oceans is to become a reality.
Lalli, Carol M. and Parsons, T.R. Biological Oceanography 2nd edition (1997) Elsevier.