While salmon in the wild eat a variety of things in the ocean, farm raised ones eat a high fat feed made of other fish ground into fishmeal and as a result eat even more of those toxins.

• 研究人员认为，养殖业者将其他鱼类磨成的高脂肪鱼粉，拿来当成饲料，而野生大麻哈鱼吃的则是大海中的浮游生物，这导致人工养殖大麻哈鱼吃下比野生大麻哈鱼多出好几倍的污染物。