Rise in Accumulations of Methyl-mercury toxin in Fish
Contrary to the conventional wisdom that the reduction of methyl-mercury contaminants in the seawater, studies have found that the rise of the dangerous toxins in the fish has increased.
Why has this happened?
- Researchers have claimed that the general increase in the rise of methyl-mercury toxins in the fish can be attributed to the two factors- ocean warming and dietary shifts in fishes due to overfishing caused by increasing human consumption.
- Particularly, in codfish, the rise of methyl-mercury can be directly attributed to the overfishing which was a result of greater demand for codfish in global markets.
- Data of the past 30 years has been analyzed by researchers and it has shown that a 23% increase has been observed in the concentration of methyl-mercury in the codfish found in the Atlantic Ocean.
- Contrarily, a decrease of 33-61% reduction in the concentration of methyl-mercury has been observed in the spiny dogfish between the years 1970-2000s.
- While the codfish feed on herrings and lobsters rather than other small fishes while the spiny dogfish feeds on squid and cephalopods.
- Herrings and Lobsters have a higher accumulation of mercury in them.?
- The concentration is also dependent on ocean temperatures which are rising globally.?
- It is observed that human exposure to toxins through fish consumption will increase due to rising consumption and due to climate change.
Effect of Mercury on Humans
- Prolonged exposure and consumption of mercury have been found to cause Mercury poisoning.
- The symptoms of mercury poisoning include muscle weakness, poor coordination in the digits & limbs, high level of numbness in the hands and feet, rashes on the skin, anxiety, memory problems, trouble speaking, trouble hearing, or trouble seeing.
- If there is a high level of exposure to mercury, it is known as Minamata disease.
- Exposure to Methylmercury in small children causes acrodynia (a pink disease which makes the skin look pink and peels).
- Other effects include kidney problems and decreased intelligence.
Report: 99 of 100 cities with environmental risk are in Asia
A private firm Verisk Maplecroft has found that the Asian cities face the greatest risk from environ...
Vineyard Wind Project
Vineyard Wind Project is the first major Offshore wind farm that is to power 400,000 homes. The proj...
Climate Action Tracker: Global warming by 2100 to be at 2.4°C
The Climate Action Tracker recently released a report calculating the impacts of the recent US Clima...
GNAFC’s Global report on food crises
The Global Network Against Food Crises (GNAFC) recently released the “2021 Global Report on Food C...
RBI joins Network for Greening the Financial System- NGFS
The Reserve Bank of India recently joined the Network for Greening the Financial System (NGFS). By j...
|View All E-Books: Recent Release|