Все о дельфинах На английском

All about dolphins DelfinyDelfiny - one of the most mysterious animals on our planet. The intelligence of these marine inhabitants is considered so high that they are called "people of the sea." Scientists say that dolphins are smarter and smarter all the other animals. Dolphins live in water, but it is not fish, but mammals of the order Cetacea. That is, they need the air - they breathe easy, not gills. People can always see the faces of dolphins on the surface of the sea, because dolphins can stay underwater for an average of about 3-5 minutes (although there were cases when dolphins have been under water for 10 to 15 minutes). Dolphins live in flocks. They always help each other and never leave each other in trouble. These highly developed marine animals are very similar to humans, they tend to self-sacrifice. If they hear the sounds from the shore, like dolphins cry for help - they are thrown on land, while the dying. But despite this, modern delfinissledovateli marine fauna argue that the dolphin is not so harmless. There are cases of atypical behavior of dolphins. So we know that dolphins when they met with their relatives from the order Cetacea - porpoises (porpoise), attack and destroy them. To explain this behavior hunger can not, because dolphins eat only fish and never eat brown dolphins killed. Also, there are cases when the dolphins were killed or female dolphins. But such incidents is rather an exception to the rule. Srednestatichesky Dolphin - is the embodiment of friendship and kindness. Dolphins may issue a dozen different sounds. The sounds that publishes dolphin - whistling, snapping, barking ..... range of dolphin sounds is between 3000 Hz and 200,000 Hz, which means it can communicate as usual, and the ultrasonic waves. Dull prolonged whistle, followed by a high and melodic - means that the dolphin calls for help. When the dolphins are angry - they start barking ... especially a wide range of sounds from a dolphin - bottlenose dolphins. It may be moaning, squeaks, whining, whining, pohryukivanie, barking, different heights squeaks, clicks, meowing, chirping ... Hearing dolphins - is unique and operates on the principle of sonar. As reflected sound dolphins can determine the range of the object, its size, shape. Dolphin is oriented in the surrounding space more by hearing than by sight. And it is justified, because the visibility in the water is not high. delfinV day dolphin can eat up to 30 kilograms of live fish. This is necessary in order to maintain body temperature constant at any water, even very cold. A body temperature are very high, because it is warm-blooded mammals. Scientists have long puzzled the question of how dolphins sleep. After all, the sea can easily become a victim of drowning or attack other predators. Now, however, it became clear that dolphins do not sleep like a dream of ordinary animals - during sleep one hemisphere of a dolphin resting, and the second - awake. Thus, the dolphin is always in control and at the same time, gets a good rest. Dolphins live for about 30 years. Delfinyata born about once every two years. Delfiniha at this time trying to jump high to the cub was able to take the first breath. Dolphins - very touching parents patronize their young for about five years. And even reached puberty, baby is still very much attached to his mother and tries to follow her everywhere. Dolphin and man delfinDelfin and people are arranged in physiological terms very similar. Both have four-chambered heart, both lungs are breathing, brain weight is about the same. And the people and dolphins - warm-blooded creatures, and even the size we are approximately equal: with average dolphin reaches a length of 1.5 to 2 meters and a man too. There is a version that sometime in the far-distant past, dolphins and humans had a common ancestor. During the evolution of dolphins remained in the water area, and the man went to the land, losing some unique abilities. The friendly attitude of the dolphins to a person - an inexplicable phenomenon. Dolphins seemed to consider us for their relatives. They sincerely rejoice at the sight of people cheering jumping out of the water, absolutely not afraid of us, saving drowning. Dolphin, which saves their relatives often at the cost of his own life, also swims for help and the man. He beached drowning man, save him from a shark, show the way to seafarers who have gone astray. Such self-sacrifice does not svoystvennodelfin marine animals. Does this mean that the dolphin - is much more than just a marine mammal? Scientists are trying to find an answer to this question, but is clearly only one thing: a dolphin being so highly that not one inhabitant of the marine world (and land) is not able to compare with him