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The food security implications of using non-farmed fish as
ingredients in aquaculture feeds are much less localized, and
larger in scale. One quarter of all fisheries catch is destined for
non-food uses. Approximately 60% of ‘non-food’ fish comes from
‘reduction fisheries’ – single species fisheries targeting ‘forage fish’
for conversion to fish meal and fish oil. Aquaculture currently
utilizes 68% and 88% of fish meal and fish oil, and its share of total
consumption has grown rapidly (Tacon and Metian,2008). A
further 40% of non-food fish landings are comprised of mixed
low market value fish and other aquatic animals, sometimes
referred to as ‘trash fish’. A substantial proportion is comprised
of the juveniles of commercially important species. ‘Trash fish’,
which is often landed as bycatch from trawl fisheries, is thought to
account for 35% of marine catch in Bangladesh, China, India,
Philippines, Thailand and VietNam, and is mainly used in farm made fish feeds(Tacon and Metian,2009).