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Fish Contamination in the Great Lakes
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| Submitted: Thu Jul 11 2002
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Matt Stanelle Hour 3 11/19/01 Fish Contamination in the Great Lakes Defining Problem / Research Question There are many chemicals in the water but only at a very low concentration. Some of these chemicals can bioaccumulate in aquatic organisms and can become very concentrated with chemicals such as: toxaphene and PCBs. Small fish and zooplankton eat large quantities of phytoplankton. Any of the chemicals accumulated in the phytoplankton become even more concentrated in that animals that eat them. This is the same for every step in the food chain. Fish like lake trout and lake salmon can have contamination levels millions of times higher than that of the water they live in. In fact, all foods, including fish, contain environmental contaminants. State and provincial governments provide information to consumers regarding consumption of sport-caught fish. This involves interpretation of studies of health effects from exposure to contaminants. Some effects may include numbness of fingertips, dizziness, and...
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