Where are the blue whales mainly distributed?

The blue whale is the largest animal on the earth at present. The weight of an adult blue whale can grow to more than twice that of brachiosaurus, the largest dinosaur that once lived on the earth, and about 30 times that of an African male elephant.

Blue whales, also known as "razor whales", belong to mammals, cetaceans and baleen whales. Living in the ocean, I like to live in groups, usually a few or dozens of them migrate in groups. All over the world. In the southern hemisphere, they swim to warm waters near the equator for breeding and wintering every year. Travel long distances in summer to find bait near the ice floes around Antarctica; In the northern hemisphere, living in the northern half of the Atlantic Ocean, reaching the ice floe belt in the north, living in the Pacific Ocean and reaching the Aleutian Islands in the north. The blue whale is the largest animal on the earth at present. It is about 30 meters long and weighs about 170 tons. You can open it to the width of 10 adult with one mouth. The weight of an adult blue whale can increase to more than twice that of brachiosaurus, the largest dinosaur that once lived on the earth, and about 30 times that of an African male elephant.

The blue whale has a light blue back and a wrinkled abdomen with ochre yellow spots. Its tail is wide and flat, and it can swing freely and flexibly in the water. It is not only the driving force, but also acts as a rudder, with a speed of 27 kilometers per hour.

Blue whales are partial to food, almost all of them feed on krill, so the distribution of blue whales is limited to the sea area with many krill. Although the blue whale living in Antarctic waters is a giant on the earth, its throat is extremely narrow and it can only swallow fish smaller than its fingers. The predation mode of blue whales is "swallowing", and the main food is plankton such as shrimp, jellyfish and diatom. It often opens its mouth on the surface of the water and swallows the shrimp together with the seawater, then closes its mouth, filters out the seawater and swallows the shrimp into its stomach. A blue whale eats about 4 tons of krill every day. If the food in its stomach is less than 2 tons, it will panic because of hunger, as if it will never have enough to eat. So it often dives into the depth of 30 to 40 meters to find food. Because I stay in the water for a long time, every time I float into the sea for air, my nostrils will spray a water column as high as 15 meters, which looks like a fountain from a distance. The physical strength of the blue whale is second to none among all kinds of animals in the world, and it has the reputation of "Hercules" in the animal world. When it breathes, the jet tide is spectacular, and the jet water column is as high as 10 ~ 15 meters. It is estimated that the total power generated by the physical strength of a huge blue whale can reach about 1300 kW, which greatly exceeds the power generated by the main engine of the medium-sized whaling department and is similar to that generated by ocean-going whaling ships. Therefore, a huge blue whale was captured. When it struggled to escape with a long rope, even if the whaling ship "knocked down the car" at full power, it could not stop it, so it had to loosen the rope and follow closely.

It is said that a blue whale once dragged a 27-meter-long whaling speedboat for more than 70 kilometers, while the speedboat was retreating at full speed.

Blue whales breed in winter. The mother whale was pregnant for one year before giving birth to her calf. This newborn whale is seven years old. It is about 5 meters long and weighs about 6 tons. After feeding for 24 hours, its weight can increase by about 100 kg, with an average increase of about 75 grams per minute. After seven months of breastfeeding, the young whale can reach about 23 tons in weight and 0/6 meter in length, and begins to learn to swallow all kinds of plankton with its mouth open. Little blue whales will not reach adulthood until they are 5 years old, and their life span is about 20 to 30 years.

Fin whales are smaller than Arctic right whales, black right whales and blue whales, ranking fourth among cetaceans. The head accounts for about one-fifth to one-fourth of the body length, and it is huge, with asymmetrical head color, small dorsal fin, longitudinal ridge on the head and gray herringbone on the back of the head, which is a favorable feature for close-range identification. The right lower lip, mouth and some baleen are white, while the left side is all gray. Color asymmetry may be caused by swimming on the right side when eating.

It is reported that a blue whale can swim more than 3,000 kilometers in just 47 days. Such a long journey kept them away from the feeding base and did not eat for four months. Live on stored energy.

The gestation period of the blue whale is 1 1 month, and a newborn calf is about 7 meters long and weighs more than 2 tons. Breastfeeding more than half a ton a day will double your weight after one week. When the calf is weaned at about 6 months, its length will double, but it will take 4 to 5 years to reach sexual maturity and full development.

Blue whales are mammals that breathe with their lungs, and they need to come out to breathe every 10 ~ 15 minutes. When the blue whale comes out of the water, the carbon dioxide in the lungs is first discharged from the nostrils and then inhaled. The hot and powerful carbon dioxide exhaust gas discharged from the nostrils, accompanied by loud screams, also swept the nearby seawater out of the water surface, with a height of about 10 meter, so a spectacular white fog column appeared on the sea surface.

Blue whales breed in winter, and females are usually born every two years. Pregnancy 10 ~ 12 months, each fetus only gives birth to 1 child. The newborn cub is 6-8 meters long and weighs about 6000 kilograms. In order to prevent suffocation, the female must lift the cub out of the water to take the first breath of air, and then she can breathe by herself. A pair of nipples of female animals grow on both sides of reproductive foramen, and swim in the upper layer of seawater when breastfeeding, and the cubs follow closely below the tail of female animals. Because the larvae have no movable lips, they can't hold their nipples to suck milk. Female animals directly spray milk into their mouths by virtue of muscle contraction, which is also a good adaptation to their main activities in water. Blue whale's milk is rich in nutrition, in which the fat content is 10 times that of milk, and the milk that young whales suck every day is above 1000 kg, so it develops rapidly. After 8 months, it can be increased to 65,438+05 m and its weight can be increased to 23,000 kg, so it can eat all kinds of plankton with its own mouth. By the age of two and a half to three, the body length can exceed 20 meters.

Blue whales enough to visit the world's oceans alone or in pairs can live to 120 years old.

In the battle for the Falkland Islands between Argentina and the British navy, there appeared an "uninvited guest"-the blue whale. The blue whale meets the killer whale, the British army encounters the torpedo ... The blue whale, the British army is in danger, and life and death are uncertain. Thus, a story of mutual relief between animals and people happened.

Major Clark was the captain of the British navy Brave and the destroyer. He led a task force to recapture the Falkland Islands from the Afghan army. The black spot that just appeared on the radar screen disappeared. Clark ordered the alarm to be lifted. After a while, the officer on duty exclaimed again: "The radar has captured several other signals, not far from the whale." Careful identification revealed that the killer whales on the sea were coming in the dark, surrounded by a pair of blue whales. This is a bloody killing scene. The ferocious and cunning killer whale first pounced on the smaller male blue whale. Several fierce killer whales opened their jaws and exposed their sharp teeth, biting the tail of the male blue whale at once. Others jumped up, bit the head of the male blue whale and pulled out the tongue of the male blue whale.

The fatally wounded male blue whale surfaced again, dying. Soon, killer whales began to attack the female blue whale.

Two killer whales attack first, and two big mouths bite the tail of the female blue whale together. After all, the female blue whale is much stronger than her mate. She jumped up unexpectedly, and most of her body was above the water. She not only got rid of two killer whales, but also turned her eyes to her opponent. As a result, one killer whale was killed and the other escaped. When the female blue whale took the opportunity to escape, it was stopped by other killer whales. The female blue whale jumped hard again, then turned over and plunged into the water. About two minutes later, the female blue whale surfaced. As soon as it came up, it approached the Brave and swam against the side of the ship. Its enemies are still eyeing.

Buyog, a whaler who was born and raised in the Falkland Islands and became a lieutenant after enlisting, said: "Blue whales are very smart. It is close to us, begging for our protection. It understands that we are its only hope for survival. "

Major Clark hesitated. If he gives the order to shoot, the consequences are obvious. Because it is not a normal battle, maybe he will be removed from his post, which will lead to his captain career. But Clark found that the female blue whale really seemed to be begging for their help, and her big eyes like human beings were looking at him. Major Clark took a deep breath and finally made up his mind: "Get guns and all kinds of light weapons ready, aim at the killer whales and fire!" "In an instant, all the guns on board screamed. There are more than 100 bloody killer whale bodies floating on the sea. The mother blue whale was safely attached to the Brave, and she was saved. Since then, the mother blue whale has been following the "Brave" and performed hundreds of stunts for the officers and men on board.

One morning, the military palace on duty reported that Clark had found a strange thing on the water all over the world. He was stunned when he looked through a telescope. He saw the female blue whale pushing something like a petrol tank with her head. "That's a mine!" He shouted in horror, immediately ordered the destroyer to stop, and let the gunner aim at the mine, ready to detonate at any time.

Buyog is called. Clark eagerly explained the situation to him: "This is a magnetic mine, which will explode when it meets the magnetic field generated by a big ship." Fortunately, the sacred female blue whale separated it. If the mine comes any closer, the warship will be blown up. I don't know what you can do now "After a little thinking, Buyog took out the dumb voice of" dialogue "with the female blue whale on weekdays and put it in his mouth to vibrate. The mother blue whale suddenly stopped playing with thunder. Buyog continued to play quietly, and the mother blue whale reluctantly left her "plaything". After the mother blue whale left, Clark ordered a gun to detonate the mine.

Major Clark quickly reported to John Woodward, commander of the fleet, "The blue whale saved us, General. Without its help, we would never find a floating mine in such a thick fog. " "It's a good thing you protected it," Woodward said loudly.

At two o'clock one morning, the landing operation began. Buyog's boat had just approached an island when suddenly a group of Argentine planes flew in unnoticed. With a loud noise, Buyog's landing craft was hit, and Buyog was fortunately thrown into the sea. He was injured in his left arm and struggled in the cold sea. Just when he was helpless and tired, he thought of his friend, the mother blue whale. He took a dud from his coat pocket with his right hand and put it in his mouth to blow it hard.

After a while, the sea below him began to churn, and the mother blue whale carried Buyog out of the cold water with her back like a hill and sent it to the brave. Several sailors quickly rescued Buyog from the ship, and the female blue whale quickly disappeared into the vast sea. A few minutes later, it came back. This time, it carried four drowning soldiers on its back. In this way, the mother blue whale made a round trip and rescued 38 officers and men from the stormy waves.

When the 74-day battle of the Falkland Islands ended, the destroyer Brave returned home with honor. Buyog stayed, but with the support of the fleet commander, he circled a piece of water in the bay as a training ground for excellent exotic animals, continued to train his dolphins and returned to his rescuer, the female blue whale.

In recognition of the mother blue whale's outstanding feats in naval battles, John Woodward, commander of the fleet, personally wrote to Prince Philip, asking for the Victoria Cross, the most enviable prize for the mother blue whale. Prince Philip wrote back soon, expressing admiration for the righteous actions of the headquarters and naval officers and soldiers to protect the blue whale, and also drew a cross on the huge back of the female blue whale on behalf of the Queen.