When was the scientific study that found that if current trends continue all fish stocks will collapse within fifty years published ?
The FAO State of World Fisheries and Aquaculture 2004 report estimates that in 2003 , of the main fish stocks or groups of resources for which assessment information is available , " approximately one - quarter were overexploited , depleted or recovering from depletion ( 16 % , 7 % and 1 % respectively ) and needed rebuilding .