My deep sea fishery

"You haven't heard it is your ear." Chen Qingsheng on the side replied.

Fang Friends did not believe in evil, "How, you have just heard it, I didn't hear it?"

Xiangyang smiled and said: "No, including me, we haven't heard it."

Blue whales are animals that can make a sound in the world.

When contacting the partner, the blue whale will make a low frequency, deafening sound. This sound is sometimes more than 180 decibels, which is more than the sound that is sent to the runway to listen to the jet plane.

There have been scientists to use a sensitive instrument to detect blue whales in 80 kilometers away. Estimating the sound of blue whales can reach a hundred and fifty to one hundred and eighty-five scoring.

Even considering different impedances of water and air, different standard reference pressure, the equivalent sound range in the air is still about 120 decibels.

As a comparison, the sound of the wind drill is approximately one hundred dec.

But human beings cannot experience blue whales are the largest animal.

Because the base frequency of the blue whale population is around 10z, the lowest frequency that humans can hear is twenty Hz.

However, human beings can't hear the cry of blue whales, but do not represent humans can't feel the cry of blue whales.

In the past, in many KTVs with the bar, there was a kind of sub-soundable subwoofer, with the sound sent from this sound wave, and humans can't hear it, but it can make people's spirit extreme excitement.

But now this subwoofer is now not allowed, because the surrounding households will cause serious insomnia.

Just now, Xiangyang suddenly felt the blooming flower, definitely that the blue whale suddenly called, although the huge speech did not hear, but the nerves of Xiangyang have an impact.

"It turned out that this guy is calling, no wonder I have just been inexplicably uncomfortable." Fang Friendship gave it clearly, and immediately shouted.

Then, Fang Youqun asked Qiangyang: "Yang Ge, why do you know why? Is it in threatening these head whales?"

Xiang Yang shrugged, "I know that this blue whale is called."

Don't say that Xiangyang doesn't know why the blue whale will make the extreme sorrow, even the scientists don't know why the blue whale is to vote. In 1995, some scientists made a few assumptions. First, the blue whale keeps individuals Distance, the second is similar to individual identification, and the third is that environmental information transmitting examples such as foraging, warnings, and seeking pictures.

In addition, some people present blue whales to keep the group contact, such as female and male communication, or using echo characteristics like a bat. Location and food positioning.

In the 1960s, some scientists believe that a large number of radios will be placed in the world's ocean record blue whale songs will be a very cool approach.

Decadent, some scientists who have studied a few decades for the blue whale singing have got a strange discovery. The song of every blue whale in the world has become more deep every year, but for the reasons, They are not clear.

This is a very strange phenomenon, take human beings, although there is a difference in language or location, each of the people who live in Earth is very small, this slowdown is small every year Reduce is less than one Hertz, and the entire trend is relatively stable and sustainable.

Biologists have tried to increase the transformation of blue whale sound from global warming to noise pollution.

Some people think that many factors may cause this phenomenon.

However, Xiangyang feels that the impact of global warming on the ocean does not explain the change of whale sound, because the change of blue whale sound is not a single individual, but the entire ethnic group, and the environmental impact is mainly reflected in seawater acidity and density changes. On, the sound from the blue whale does not have a large change.

In contrast, noise pollution may be a more convincing explanation.

Xiangyang once boldly imagined, in the crowd of people, customers can only increase tone to causing the attention of service students.

"I really envy this blue whale, free, almost at the top position of the food chain in the entire ocean, and don't worry for food." Xu put it to yourself, then quite envious A sense of emotion.

In the whole ocean, almost only killer whales can kill.

Xiang Yanya laughed and did not speak.

In fact, the blue whale has a natural enemy in addition to the killer whale, that is, human.

Blue whale is stranded, not much, due to its special group structure, Xiangyang has never heard of blue whale groups.

But blue whales are also stranded, and most of them are stranded because of humans.

1920 blue whales stranded in the Sublivi Louis Island Beach in the Scottish, and its head was captured in the whale, but the fish fork did not explode.

Like other animals, the injured blue whales can do not hesitate to breathe at all costs, and the strand can make it not died.

Although the blue whale is not easy to kill and store, its huge body, the body weight, swimming speed and strength means they are usually not the goal of whaling.

However, when some countries that have killed the smelt whale and the storm whale in a large number of countries that were whaled. When the number of whales decreased, the whaleman had to focus on the blue whale.

The earliest killed blue whale begins in 1864.

In 1864, Norwegian Sens Werdard was equipped with a special design to capture a large whale fish fork.

Although this kind of fishk, this method is very fast, this method is very popular, and at the end of the 19th century, the number of blue whales in Northern University began to decrease.

Since the first blue whale is killed by humans, the fate of the blue whale is actually destined.

Because the blue whale has a thick layer of thick fat, soap, shoe oil, etc. can be made.

Therefore, blue whales will inevitably be killed by whaling people.

Since 1864, the blood capture of blue whales has grown rapidly around the world. In 1925, the United States, the United Kingdom and Japan have joined the ranks of killing blue whales.

Whaling hand with a whaling boat After killing Blue Whale to a huge processed mother carrier for processing.

In 1930, only 41 famous whaling boats recorded were killed 28,325 blue whales.

At the end of the Second World War, the blue whale population was approached.

In 1946, the United Nations introduced the first time of international whale trading quota restrictions.

But these quotas are invalid, as the agreement does not take into account the differences in different species.

Quantity Rare species can be maded to the number of varieties. Due to human killing and pollution of marine environments, the International Whaling Committee began to kill blue whales in 1960.

However, there have been thirty-five thousand blue whales that have been killed, and the number of blue whales around the world has decreased by less than 100 years ago.

At the end of the 19th century, the world only survived 50 blue whales.