Question 42 Why is it that Biomagnification can cause a contaminant in lipid tis

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Question 42

Why is it that Biomagnification can cause a contaminant in lipid tissue of a fish to become much greater than one would calculate using the ambient water concentration and the K_ow? Why does biomagnification cause contaminant levels to generally increase in fish the older the fish? If you eat only "organic" food, will you really avoid dioxins and PCBs in your diet? Why/why not? In organophosphate pesticides, what kind of linkage is present? Name it and draw it using R groups to denote some kind of organic chain. Aldicarb is a carbamate. What's the linkage present, and is it an insecticide or herbicide? Permethrin is a synthetic pesticide that is based on what kind of natural structure, and is it an insecticide or herbicide? Why isn't the pesticide 2, 4, 5-T manufactured any more? And is it an insecticide or herbicide?

Explanation / Answer

42.) Mercury contaminant can also be biomagnified from trace concentrations in the environment. In this case, trace concentrations of mercury in water can result in large contaminations of fish and other predators.they accumulate progressively as organisms grow older, and they accumulate into especially large concentrations in top predators, as described previously. In some cases, older individuals of top-predator animals such as raptorial birds and fish-eating marine mammals have been found to have thousands of ppm of DDT and PCBs in their fatty tissues

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