In 2008, the United Nations Food and Agriculture Organisation (FAO) found that 45% of fish were farmed. PETA puts that at 40%, and in 2009, Livescience claimed that 50% of fish consumed globally came from fish farms. It looks like the percentage is rising; while this prevents overfishing of wild populations, it still raises a lot of environmental concerns. Disease can be spread from farmed fish to wild fish, and if the fish breed it results in slower, less intelligent wild fish that are less able to survive on their own.
According to this news article published in 2009, about 50% of fish consumed globally come from fish farms.
Animal food production from fish farming (aquaculture) grew at a rate of 6.6 percent from 1970 to 2008. The global per capita supply of farm raised fish grew from 1.54 lbs to 17.2 lbs.
Aquaculture now constitutes 46 percent of the world’s fish supply in volume, up from 43 percent in 2006.
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