Sea animals are increasingly being bred in aquaculture because fish stocks are becoming smaller and smaller due to heavy fishing. When cultivated in aquaculture, they cause great environmental damage, as chemicals, fish faeces, food residues and antibiotics get directly into the waters in which they are cultivated. The consequences are overfertilization of the coasts, loss of mangrove forests and thus eroding coastal areas as well as the waste of raw materials.
Example: For the production of one kilo of salmon, 5 kilos of other fish are fed to them. In the case of aquaculture tuna, the ratio is even worse (20 kilos of fish per kilo of tuna).
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