Mercury in fish
Mercury in Fish
Mercury in fish refers to the presence of the heavy metal mercury in fish tissues. This phenomenon is of significant concern due to the potential health risks associated with mercury consumption. The primary source of mercury in fish is methylmercury, a highly toxic form of mercury that fish absorb from water through their gills and from the prey they eat.
Sources of Mercury in Fish
Mercury enters the environment through natural processes such as volcanic eruptions and human activities such as the burning of fossil fuels and mining. Once in the environment, mercury can be converted into methylmercury by certain types of bacteria. This methylmercury is then absorbed by small organisms, which are eaten by fish. Through a process known as bioaccumulation, mercury levels in fish can become significantly higher than the levels in the surrounding water or in the organisms they eat.
Health Risks
Consumption of fish contaminated with high levels of mercury can lead to mercury poisoning, which can cause a variety of health problems in humans. These include damage to the nervous system, kidney damage, and developmental problems in children. The World Health Organization and the Food and Drug Administration have issued guidelines on the consumption of certain types of fish due to their high mercury content.
Regulation and Guidelines
In many countries, there are regulations and guidelines in place to limit the amount of mercury that can be present in fish sold for consumption. These regulations are often based on the guidelines set by international organizations such as the World Health Organization. In addition, many countries have programs in place to monitor the levels of mercury in fish and to inform the public about the risks associated with consuming fish with high mercury levels.
See Also
Mercury in fish
Mercury Food Chain
Advice About Eating Fish - EPA & FDA - 2017
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