Elusive Amazonian dolphins
The fact that whales are not fish, of course, known to every schoolboy. They breathe air. Female whales give birth under water to live young and feed them milk. They even have a little bit of hair. In short, Keith is a typical warm-blooded mammal. But, at the same time, this is the strangest of all mammals. 10th place: sperm Whales can dive to a depth of 1000 meters. The pressure at that depth is 100 times greater than the pressure on the surface.
9th place: When diving the pulse of the whale falls to ten beats per minute and blood ceases to flow into the vessels of the fins, skin, tail. It nourishes the brain and heart. Continue reading
The structure features of this species:
The body bare, streamlined.
Body movement is a powerful tail with two horizontal rowing a leaf on the end. The front limbs have evolved into flippers, the back is completely missing. Nostrils (blowhole) are on the top of the head.
Mating, birthing and feeding of offspring occur in the water. The litter usually one pup, although there are twins.
In unit two suborders: toothed and baleen whales. Continue reading
Still scientific society believed that the whistles were the main sounds made by these mammals, and did not even know about the importance of using pulse-explosive sounds. Scientists of the Research Institute of Dolphins (Bottlenose Dolphin Research Institute BDRI), based on studies conducted in the waters of Sardinia (Italy), showed that these sounds are vital to public life, and vividly reflect their behavior.
“Pulse-blasting sounds are used in the life of a bottlenose to socialize and maintain their position in the social hierarchy to warn them from physical conflict, and this is also a significant energy savings,” said one of the leading researchers BDRI. The analysis, published by the publishing house Nova Science Publishers, in the book about dolphins: anatomy, behavior and risk, represents the most complete set of these pulse-explosive sounds and whistles collected through the use of bio acoustics since 2005 in the waters of Sardinia (Italy). Continue reading
Dolphins can emit echolocation signals to investigate the situation and detection of obstacles, and the so-called “whistle”. These signals they tell each other about your condition. For example, “I’m in trouble” is a great melodic whistle, following a short and dull. “I’m angry” – it sounds like barking. There are sounds that indicate a greeting, farewell or disturbing. Those signals dolphins recognize members of his clan. Proven fact was that each Dolphin has its own name, which receives immediately after birth and responds to it all his life.
The most talkative representative of the Dolphin is the Beluga, or white whale. They povizgivayut, whistling at high frequencies, produces a melodic shimmering trills and sounds like a cackle, chirp or mauganui. Belugas can even imitate bell ringing or voices of birds, which have never been seen. These competencies often referred to as “sea Canaries”. Continue reading
Adult dolphins reach a length of 1.5 to 3 meters and can weigh from 200 to 400 kg. and more Dolphins that live in cold waters (e.g., near Scotland), usually larger than those that live in warm seas and oceans. Adult males usually larger than females.
Bottlenose dolphins are grey color: dark top and light (almost white) on the bottom. Bottlenose dolphins typically swim at a speed of 10 to 12 km per hour, but may run up to 30-50 km per hour. For breathing dolphins rise to the surface of the water. As they breathe, on average, every 5-8 minutes. Continue reading
Such as active sonar, unlike passive, not only picks up sounds that are distributed objects, but he sends call letters to them. Industrial fish finders are used during military operations to detect underwater enemy ships and navigation of the peace courts.
Unlike humans, dolphins use echolocation, also called biosonar, for the past several millennia. And needless to say, they are incredibly successful in this! The ability of the supersensitivity built into their DNA, so they can easily be distinguished in the water pneumatic BB gun from a little wheat grain at a distance of 15 metres or more. Continue reading
Australian biologists a few years ago was watching bottlenose dolphins living in shark Bay and revealed very ugly facts: it turns out that the males of these dolphins in groups of three, to make them handier to drive females for mating. This friendship can last for years
The dramatic events begin to develop when a dispute over a female face two such triples – then each group begins calling his comrades to his side. In disassembly are drawn dozens of animals, sometimes they have a brutal mass slaughter. Scientists have dubbed these bunch of animals “Dolphin mafia”.
But as it comes to females, bottlenose dolphins behave peacefully and even friendly. Continue reading
The brain of a Dolphin is not only a lot of weight, but has a complex structure with a large number of convolutions of the cerebral cortex, the superior part of the brain responsible for complex mental functions. But the highly developed brain is a sign of high intelligence and highly organized, complex behavior. And the dolphins have confirmed this fact, because they are skillful hunters, caring parents, disciplined members of the pack, and if necessary – and competent leaders. Continue reading
The Experience Of Russia
Oddly enough, the first attempts to train marine mammals for military actions have been taken in Russia, and the proposal made by Vladimir Durov, however, about the seals. Famous animal trainer suggested using animals as the bomb squad. Unfortunately, they all died in the result of sabotage by enemy of Russia – Germany. Case of poisoning combat seals investigated to the end and was not due to the revolution of 1917. Papers that reflect this learning, were eliminated, so they couldn’t use the enemies.
Then the idea of using marine animals caught the Americans that put together with other mammals and even dolphins. Initially, they served as a patrol, then became engaged in mining, simultaneously neutralizing floating people. Continue reading
Shark is one of the world’s oldest inhabitant of the seas and almost a perfect weapon for killing. Its anatomical features like created to hunt and destroy their prey. That only is ominous and awesome at the same time the device jaws of a white shark.
The size of the teeth of this predator reaches 5 or more inches diagonally, and the number reaches three hundred. And there are teeth in the jaws of a white shark in several rows: the front are working, and the rest of the backup, so to speak as a reserve! Continue reading