杂食性和草食性鱼类的感染率较高，肉食性鱼类较低。
The infection rates of omnivorous and herbivorous fishes were higher than that of carnivorous fishes.
真正的维生素a只能在动物食品中找到，如鳕鱼甘油、鱼类和甲壳类动物、肝脏、牛油、草食性动物的蛋黄等。
Helps detoxify. True vitamin a is found only in animal foods such as cod liver oil; fish and shellfish; and liver, butter and egg yolks from pasture-fed animals.
草食性的三种鱼类均为淡水养殖，团头鲂与鳙鱼的含量显著高于草鱼。
Three herbivorous fish were farmed by freshwater, while mercury in Bighead carp and Bluntsnout bream were higher than Grass carp.
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