Презентация по теме "Морское животное-дельфин"

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scientists believe that dolphins swim in the ocean for 70 million years!

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Dolphins mouth equipped with a plurality of hard teeth - from 80 to 100 on each jaw; with their help it is possible to easily hold the food in your mouth Dolphins - it is a large aquatic mammals, the body length from 3 meters to 4.20 m. Weight - from 150 to 300 kg. Males 10-20 cm longer than females. Dolphin lives of 30 to 50 years in natural conditions and seven years in captivity.

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Dolphins eat mostly different kinds of fish and squid, depending on the region where they live. They are selective in eating and do not eat that horrible, prefer a certain type of fish. They swallow whole fish, because their jaws and teeth are not designed for chewing.

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enemies dolphins have long been a shark. they attacked the weakened animals or attacking young Natural disasters: a sudden frost or storm - also threaten the lives of dolphins. Unfortunately, the greatest threat to the life of dolphins is people. It kills them directly poaching, or indirectly polluting the environment

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The dolphins may swim at a speed of 25 miles per hour for a long time. This is about 3 times faster than the fastest athletes swimmers in the world . Communicating with dolphins has a positive effect on the human body, especially in the child's mind . Dolphins are known for their playful behavior and the fact that for the sake of entertainment, they can let the underwater air bubbles in the form of a ring with the help of the blowhole. This can be a big bubble cloud flows bubbles or individual bubbles. Some of them act kind communicative signals. The oldest dolphin in captivity, named Nellie. She lived in a marine mammal park « Marineland » (Florida) and died when she was 61 years old .