Chart of Aquaculture Environments by Country
The high protein feed for farmed salmon is largely composed of ocean caught fish meal and meat offal from poultry and hog processing. Because of bio-accumulation of toxins in the feed, "consumption of farmed salmon even at relatively low frequencies results in elevated exposure to dioxins and dioxin-like compounds with commensurate elevation in estimates of health risk." Farming of shrimp in Asia has lead to significant destruction of natural mangrove ecosystems.
Genetically engineered fish are being readied for commercial production in open net pens.
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