A recent study by scientists from Scotland, published in the Journal of Marine Science and Engineering, describes the effects of magnetic fields created by cables on crabs.
Marine biologists analyzed the behavior of sea crabs when they are close to power cables. The cables create a magnetic field comparable to that of a refrigerator magnet, but even that is enough to fascinate the crustaceans. They simply stop moving and sit motionless in one place.
This worries scientists, because this behavior could reduce the brown crab population. They stop foraging for food, looking for a mating companion and migrating, Scottish scientists said.
Laboratory tests have shown that the electromagnetic field has a detrimental effect on the crabs’ blood cells. It can reduce the immunity of crabs, as well as develop other negative effects.
Scientists advise relying on the study when designing the laying of offshore cables, as well as when installing offshore wind farms. According to the scientists, the decline in the brown crab population could have a significant impact on marine wildlife.