White sharks and shark-Mako in Primorye were always
The waters of the island Russian (Russky Island ) during the APEC summit 2012 in Vladivostok (apec 2012. Vladivostok ) will be patrolling white sharks and shark-Mako. One of them was June 23, has already inspected the Bay Rynda (Rynda Bay. Peter the Great Bay ).
Dangerous to humans shark species swim in the waters of the sea of Japan, Primorye coast much earlier than was thought, – IA “Primorje” .
Toothy predator, which is traditionally considered “tropical” the inhabitants may feel quite comfortable and in the cold water of the sea of Japan. This was stated by senior researcher of the Institute of marine biology Feb RAS, doctor of biological Sciences Vladimir DOLGANOV.
It was Vladimir Nikolaevich investigated two shark attacks 2011 in telyakovsky Bay and off the island Zheltukhina in the sea of Japan.
A scientist is considered a leading expert on sharks in the far East. According to him, information about large dangerous sharks, for example, white, prefer warm water with the temperature above 18 degrees, outdated.
White sharks, known in the press sharks-cannibals, have seen and caught off the coast of Japan and Sakhalin at water temperatures just plus 7 and even 5 degrees .
“These sharks are pyuterlakskaya, they have a slightly warmer body of water. So they can afford to come in more holodnyiy. Also it has been proved that white sharks can dive up to 100 meters and spend quite a long time. And agree, 18 degrees there is no,” says the Dolgans.
In his words, “invasion” of sharks in the coastal waters begins in may – but then come only Katran, which do not pose the slightest danger to humans. Threat the species arrives in June – it’s white (Great white shark ), porbeagle (Salmon shark ) and shark-Mako (Shortfin mako shark ).
Mako shark or blue-gray mackerel shark is one of the most aggressive sharks. In appearance the Mako is a smooth, oblong shape with a long conical snout (real dash).
Mako has short pectoral fins and a tail in the shape of a Crescent. A big dorsal fin mounted separately, second dorsal fin much smaller than first. Shark teeth are thin, slightly curved, they are very visible even with the mouth closed. Color shark camouflage — the top of it dark blue, bottom is white. The shark can reach a length of 4 m.
One of the fastest sharks in the ocean, can reach speeds of 80-100 km/h and jump out of the water to a height of 9 m. the Mako Shark is capable of even further mess up the scales, before the attack, which enhances the Golf effect.
Voracious. Food shark-the Mako is based mainly on bony fish, on the menu, mackerel, tuna, swordfish, and other sharks, porpoises and sea turtles.
Dangerous to humans even in coastal shallows. There were many cases of attacks by these sharks on swimmers, divers, swimmers. Flock Mako can attack a boat that can flip over, and then deal with the victims trapped in the water .
Grooves on the snout of the Mako is specifically designed for best water flow olfactory receptors. As a result a shark can smell prey several kilometres away .
According to the scientist, the sharks leave the waters of Primorye only in October. because water loses heat more slowly air.
Sharks were first recorded in Peter the Great Bay in the 30-ies of the last century. While attacks on humans, including fatalities, have been known and described in Soviet times.
“The probability of sharks off the coast of Primorye is the same as the probability of summer. They have always been here, it came to feeding and breeding. In our waters in the warm season comes about 10 species of sharks, half of which are potentially dangerous to humans,” says the scientist.
He noted that three cases in a row, recorded last year – coincidence. First of all, the aggression of the sharks could be caused by the fact that in 2011 there was a significant depletion of their forage base (anchovies, squid, herring). as well as an increase in average water temperature at 1.5 degrees above normal. This forced the predators to approach the South coast of Primorye closer than usual.
In June 2012 in the coastal waters of Primorsky Krai has already recorded two cases of emergence of sharks over 3 meters long. On 23 June, morning the company of fishermen was noticed in the water a big shark while walking on a yacht in the Bay of Rynda island Russian . The shark managed to capture on the camera of his mobile phone. http://youtu.be/JGkfA-BdGS0
Non-hazardous to humans mackerel sharks do not reach such sizes, therefore one can say that in the waters off of Vladivostok has appeared marine predator that may pose a potential threat to humans.
According to long-term observations, in our waters noted the presence of 15 species of sharks. The real danger to humans are white sharks, Mako shark, hammerhead, tiger shark.
29 June in Vladivostok held a round table on the topic “Summer holidays on the water. The sharks loved Primorye?”. Participant, senior researcher, Institute of marine biology Feb RAS, doctor of biological Sciences Vladimir Dolganov commented on the pictures found on the shore of the Bay North of the Bay of Slavic baby sharks.
According to Vladimir Dolganov, the shark is representative of a kind Korotkevich sharks-Mako .
“Structure of the teeth, fins, keel on the tail and the color suggests that it’s a baby shark Mako. This is the reason for the attack on the people of the Peninsula he was in the summer of 2011,” said Vladimir Nikolaevich.
Also according to the doctor of biological Sciences, Mako shark is as dangerous to humans as great white shark. However, the emergence of the baby Mako off the coast of Primorye — the norm .
According to Vladimir Dolganov, this species was recorded in waters of Primorye in 30-50-ies of the last century. Their dwelling near the shores of popular holiday destinations in Primorsky Krai is the norm.
Vladimir Dolganov stressed that there was no panic for no reason. However, in 2011, he said, occurred worldwide 100 shark attacks on people. ten people were killed.
More and more inhabitants of Primorski Krai suggest to refuse from swimming in the sea of Japan and at the APEC summit of 2012 to go to the lake Khanka. The lake is quite shallow, absorbs heat much better than sea. And like most vacationers exactly no sharks.