laitimes

Tens of billions of hairy crabs are flooding in Europe, Belgium invents a hunting device?

author:Scientific research small sugar sugar

According to a report by the Global Times, Belgian scientists have recently poured a lot of manpower and material resources into inventing a magical hunting device to deal with an invasive species that is rampant in the area. This invasive creature has a population of more than 10 billion in Europe and is called a "terrible ironclad monster" by Europeans, and this invasive creature is the Chinese hairy crab, commonly known as "hairy crab" by Chinese.

Tens of billions of hairy crabs are flooding in Europe, Belgium invents a hunting device?

Hairy crab is one of the favorite foods of the Chinese, it can be steamed or made spicy, it has fascinated countless people. The price of a hairy crab is not cheap in China, and the price of a hairy crab is about twenty or thirty yuan, although there is almost no meat. If the hairy crab is a little bigger, or is crowned with the title of Yangcheng Lake, the price can easily exceed one or two hundred yuan. But who would have thought that such a delicacy, which was in short supply in China and almost was eaten to the point of extinction, would become a flood in Europe and become an invasive creature that Europeans are afraid of.

The Chinese hairy crab is a native Chinese creature that gets its name from the dense hairs on its two pairs of large pincers, like two large gloves. There are really different opinions as to why hairy crabs have dense hair. It is believed that the hairy hairy crabs are mainly used to sense the direction and speed of the current, which is very important for both the survival and reproduction of hairy crabs, as they need to know when to migrate, when to look for food, and when to carry out reproductive activities.

It is also believed that the fluff of hairy crabs can also serve as a camouflage. In the natural environment, hairy crabs use these fluffs to disguise themselves as they are in the environment to avoid being detected by predators. The latest research has also shown that these hairy hairy hairy crabs can fill some grooves on the surface of the hairy crab's body, reducing the resistance of the current to the body, thus allowing the hairy crab to swim and hunt more quickly and efficiently.

Tens of billions of hairy crabs are flooding in Europe, Belgium invents a hunting device?

It is recorded that Chinese hairy crabs were brought to England by cargo ships in 1935 and thrived in large numbers in Europe. In China, hairy crabs have many natural predators, and in addition to being the largest natural enemy species, hairy crabs also face predation by birds such as cranes. But when they come to Europe, hairy crabs feel like they've arrived in paradise.

Hairy crabs, which are strange-looking and domineering, do not have much meat and are more troublesome to handle, so there is no market in Europe at all, and few Europeans are willing to eat hairy crabs. In addition to the absence of natural predators such as humans, there are almost no natural predators of hairy crabs in the wild in Europe.

The reproductive ability of hairy crabs is simply amazing, an adult hairy crab can lay eggs three times a year, and each time the number of eggs is 50-1 million. Hairy crabs are also able to survive in nature, whether they are fresh or saltwater, no matter how bad the local water quality is, hairy crabs can survive with perseverance. It is estimated that there are more than 10 billion hairy crabs in Europe, and in some rivers, hairy crabs even cover the bottom of the river. Hairy crabs are therefore also listed as one of the 100 most serious invasive species in the world.

Tens of billions of hairy crabs are flooding in Europe, Belgium invents a hunting device?

In order to solve the problem of hairy crab overflow, European countries have tried various methods, including holding hairy crab catching competitions, but these methods are a drop in the bucket for the huge number of hairy crabs. Belgian scientists have been working on the research and development of equipment for catching hairy crabs since 2018, and recently completed the development. In the years of the trial, the device caught a total of 3 million hairy crabs without harming other fish.

The problem of catching hairy crabs has finally been solved, but the new question is, what to do with the caught hairy crabs? The current solution in Belgium is to crush the hairy crabs and make them directly into fertilizer. But when Chinese foodies see this way of processing, they must be crying out for pity!

————

I am Dr. Fudan scientific research Xiaotangtang, follow me to learn more about new life knowledge, popular science knowledge and interpretation of scientific and technological information!