White sea belongs to the basin of the Arctic ocean and represents a huge reservoir polutoratonny. Seas of this type are relatively few. Similar characteristics possess Black sea, the Mediterranean, the Baltic and Hudson Bay. White sea is the smallest of them. It is divided into two unequal parts – the Northern (outer) and southern (inner). They are joined by a relatively narrow Strait, also called the throat.
In modern times, few bodies of water that don’t pollute and the White sea is no exception. Anthropogenic pollution of the White sea began immediately after the occurrence on its shores of a man and eventually became so significant that the consequences can be observed today.
In a relatively short era of navigation, some areas of the bottom, especially in small lips, where it is convenient to stand during the storm, were so covered with coal slag, which still have not recovered destroyed the bottom biocenoses. These environmental problems of the White sea cannot be considered modern, though harm from them not less.
The woodworking industry has no less impact on the ecology of the White sea. Wastes at sawmill one keretsky industrialist, was filled in the Strait between the two Islands on which it is located.The forest industry is one of the key environmental problems of the White sea. Continue reading
The shark is a collective name. There is a white shark, blue, tiger, cat, soup, mackerel, shark-Fox, nurse shark, hammerhead shark. Scientists consider 350 species of these fish. And only 27 of them are accused of attacks on humans. And a few that occur only once.
Thanks to the joint efforts of marine biologists and divers-enthusiasts have managed to debunk some common misconceptions about sharks.
Myth: Most sharks eat people.
Fact: Of the approximately 400 species of sharks in attacks on people were seen a total of about 11. Most sharks are simply too small to pose a threat to humans. But a large white shark people are not too taste, although sometimes they mistakenly attack people, mistaking them for sea lions or seals, which are their favorite prey. Besides, they live at a depth where meeting people is unlikely. Although annually reported approximately one hundred cases of shark attacks on humans, actually elephants are being killed every year twice as many people (about 200) . Dogs kill thousands of people every year!
Myth: Sharks are stupid animals with small, primitive brain.
Fact: the sharks (as the rays) the size of the brain and body comparable to birds and mammals.The research was conducted, which demonstrated that the yellow shark learning is quicker and lasts longer than a cat or a rabbit. This, of course does not mean that sharks are as smart as birds and mammals, but still… Continue reading