According to reports, Japan intends to designate crayfish as an invasive alien species, why don t lo

Japan has designated crayfish as an invasive alien species after research, and will prohibit the import, sale and release of crayfish into the wild. Crayfish are native to North America, and since they were brought to Japan, they have had a great impact on the local ecology. This species has invaded not only Japan, but also many countries around the world.

Crayfish, also known as crayfish, was originally a very important economic shrimp. However, there is still a lot of controversy because of its growth environment and reproduction speed. Crayfish mainly live in the shallow waters of swamps and ponds, and their main food is various plants and animal carcasses in the water, etc., because their body surface has a hard shell, and they live in shallow waters, so few animals will continue to prey on them except humans.

Crayfish are very adaptable and reproductive, and will not die in low and high temperatures, as long as the temperature is right, they will quickly reproduce offspring. They will desperately eat plants, algae, plankton, etc. in the water in order to reproduce. During the breeding process, they lay their eggs in burrows, which also prevents them from being eaten by other animals and increases their survival rate.

Because crayfish have no natural predators, high reproductive efficiency, and large food consumption, once these creatures enter the wild environment, it will be a disaster to the ecosystem. Their food is heterogeneous and will have an advantage in the structure of the local food chain. Theoretically, crayfish eat algae, and they can purify the water.

But without natural predators, they can't do a role in purifying water quality. There are many natural predators of crayfish, but most of them live in North America, such as the North American otter.

Crayfish in the process of growth because they can not produce astaxanthin like other shrimp, and the ** of astaxanthin in nature is mainly through algae and various small shrimp, etc., because crayfish can not directly obtain live shrimp, so they can only survive through algae and animal carcasses. With the intensification of environmental pollution, algae plants will easily absorb heavy metal elements in the water, if these polluted algae plants are eaten by crayfish, heavy metal elements will accumulate in the body of crayfish, these heavy metal elements will produce a variety of diseases if eaten, serious will be life-threatening.

Recently, Japan ** reported that crayfish is about to become an "invasive alien species" in Japan, and the Japanese do not eat crayfish at all, which has attracted the attention of many Chinese netizens, and the reason why the Japanese are not interested in crayfish is mainly because of the following three reasons1. The Japanese themselves are prejudiced against alien species; 2. The national feelings of the Japanese are very "paranoid"; 3. Japan stipulates that crayfish are not allowed to be eaten

1. The Japanese themselves are prejudiced against alien speciesFirst of all, from the fact that the Japanese regard crayfish as an "invasive alien species", we can see the "prejudice" of the Japanese against these alien species. Crayfish itself is not a Japanese creature, it is an alien creature from the United States, so the Japanese do not know much about crayfish, and they do not eat crayfish, so crayfish in Japan are generally not caught, and sometimes they are trampled and used as fertilizer.

2. The national feelings of the Japanese are very "paranoid" Secondly, the most paranoid national feelings in the world are the Japanese, the Japanese not only have some xenophobia, but also have extreme national self-confidence, the Japanese themselves have a set of their own national ways in terms of food, and the Japanese do not develop new dishes, which leads to the fact that the things that the Japanese eat now are actually left by their ancestors, and crayfish in ancient Japan, there is no such thing at all, So crayfish simply could not make it into the ancestral recipes of the Japanese.

3. Japan stipulates that crayfish are not allowed to be eaten Finally, the Japanese not only have national feelings, but also have very strict management in this regard. At the beginning, Japan's law stipulated that crayfish must be allowed to be used as pets, but Japan does not allow the sale of crayfish, import and export of crayfish and edible crayfish, so crayfish will be flooded in Japan.

It may be that I am afraid that crayfish will have some bacteria in it, which will affect the health of the locals, and I am also afraid of the appearance of crayfish, so I will not eat it.

That's because the locals think crayfish are particularly unhygienic and unhealthy, so they don't eat crayfish.

Because the Japanese treat lobsters as an invasive species and are not interested in these future things, they are a person who prefers to eat their own traditional food.

In the snack shops in major cities, merchants will always include crayfish in the ranks of sales, not only because the taste of crayfish is very delicious, but also because the number of lobsters is relatively large, and most merchants can get a certain income through **crayfish. In fact, crayfish does not belong to the domestic species, but belongs to the invasion of alien species.

Nowadays, Japan also lists crayfish as one of the invasive alien species, and the reason why crayfish is listed as an invasive alien species. On the one hand, it is because crayfish lack natural predators in JapanInevitably, there will be an impact on the local ecosystem。On the other hand, it is because crayfish reproduce very quicklyThe ultra-fast rate of reproduction will make people's precautions fall short of the rate of reproduction.

The first reason: crayfish has no natural enemies in Japan As we all know, crayfish as an invasive alien species, after entering China, many netizens speculated that crayfish would destroy the ecological environment of their country. This is not the case, crayfish has become a delicious food in the mouths of Chinese foodies, and there is more and more demand for crayfish in the market.

Wild crayfish are far from meeting the demand, so some farmers also raise crayfish. However, the limited number of Japanese residents inevitably prevented the lack of natural predators in Japan, and eventually reached a very large number.

The second reason: crayfish reproduce very fastPeople can eat delicious crayfish at various times, not only because crayfish have been cultivated in captivity, but also because crayfish reproduce very quickly. Most farmers can perfectly provide a large number of crayfish for the merchants, and after the merchants obtain the crayfish, they will make the crayfish into delicious food, which will have a certain impact on the infinite reproduction of crayfish.

However, the situation of crayfish is different in each country, and if the crayfish reproduces faster than the local population to control the crayfish, it will cause the crayfish to multiply rapidly in a very short period of time, and eventually reach a relatively large number.

In general, the lack of natural predators in Japan and the particularly rapid reproduction rate of crayfish are important reasons why crayfish is listed as an invasive alien species in Japan. Environmentalists in every country want to protect the ecological environment of each country, however, many invasive alien species will also affect the ecological protection of different countries. What's more, after some organisms enter a new environment, the environment lacks the natural enemies of small creatures, and these creatures are given sufficient growth environment and space, and their reproduction rate is particularly fast, which ultimately affects the growth and development of native organisms.

This is also an important reason why people are more afraid of the rapid reproduction of invasive alien species.

Because crayfish has fewer natural enemies and reproduces quickly, resulting in a decrease in native species, it is an invasive alien species.

Crayfish are invasive species. China was introduced from Japan in the 30s and 40s of the 20th century, and Japan introduced it from the United States in an earlier period, mainly for food and pets. Japanese environmental experts have proposed designating crayfish as an invasive alien species, and if this bill passes, Japan will ban the import, sale and release of crayfish in the wild.

Invasive species cannot be "eliminated" by eating, and crayfish have a lot of destructive power to other aquatic species and dams, affecting the ecological environment. Crayfish (crayfish) is native to northeastern Mexico and Central and South America. In the 30s and 40s of the 20th century, it was introduced into China, and gradually spread to Beijing, Tianjin, Hebei, Hunan, Yunnan and other parts of the country through artificial breeding and natural diffusion.

The invasion of crayfish has had a serious impact on China's ecological environment and national economy, resulting in the loss of biodiversity in the areas where it was introduced, and competing with indigenous species for food, habitat and other resources, seriously threatening the survival of indigenous species.

The main reason for this is that after crayfish were introduced to Japan from the United States, they proliferated in freshwater waters such as ponds all over Japan, leading to a large-scale decline in native species.

The main reason for this is that after crayfish were introduced to Japan from the United States, they proliferated in freshwater waters such as ponds all over Japan, leading to a large-scale decline in native species.

This organism is an omnivorous species, and its growth rate and ability to adapt to the environment are very strong, so it reproduces relatively quickly, and it is extremely damaging to the ecosystem, so we all want to get rid of it. According to the records, crayfish was introduced in Japan in 1927, 94 years ago. When it was first introduced, Japan hoped to use crayfish as feed for bullfrogs, but it did not expect crayfish to develop so strongly.

The reason why Japan introduced crayfish in the first place is said to be to use crayfish as feed for bullfrogs. However, the crayfish slowly multiplied in the area and spread throughout Japan. As a result, Japan's ecology has been severely damaged by the invasion of crayfish.

So recently, Japan** also announced that Japan will ban the sale of crayfish.

Why are crayfish not popular in Japan?

Friends who have eaten crayfish should know that the growth environment of crayfish is actually very harsh. They are often found in fields or canals. Anyone who knows Japan knows that Japanese people love to eat raw food because of the freshness of their food.

For example, sashimi of various fish, etc. The growth environment of crayfish dissuaded the Japanese who like to eat sashimi, and the meat of crayfish itself is not fresh and tender, and the Japanese do not know how to cook, which leads to the crazy breeding of crayfish in Japan. <>

What are the dangers of crayfish?

Crayfish are all-eating animals, crayfish like to eat the silt at the bottom of the river, they like to eat small fish or other aquatic creatures. It mainly eats bottom plants, small fish, shrimp, plankton, benthic organisms, and algae that can be used as food. Therefore, as long as there are crayfish, the living space of local creatures will be squeezed, and crayfish are aggressive by nature and have no natural enemies.

In severe cases, it can lead to the extinction of local creatures by crayfish. <>

What should I pay attention to when eating crayfish?

Eating crayfish can cause gout attacks. Many people eat crayfish with beer. Many restaurants also have a bit of a free beer giveaway for crayfish.

However, drinking a lot of beer while eating crayfish can increase uric acid in the blood and cause gout attacks. And crayfish are prone to cause rhabdomyolysis. Crayfish, crabs, and other animals carry some parasites that our usual cooking methods, such as roasting, frying, steaming, and cooking, may not kill them, so they can enter the human body.

The main reason why crayfish are banned in Japan is that they are easy to cause harm to their native environment. That's why we have to strictly control the sales of crayfish in Japan.

Crayfish are overflowing, Japan has legislated to ban the sale of crayfish, why did the creature be introduced in the first place?

Crayfish is a local exotic species in Japan, because the local water quality in Japan is very suitable for the survival of crayfish, so the local crayfish in Japan has been flooded, and the local parliament of Japan has also revised the relevant laws, saying that in the future will prohibit local people in Japan ** or release crayfish, after seeing such laws and regulations in Japan, many Chinese netizens said that they could not understand, because in our country, crayfish is a very delicious food.

The reason why Japan will ban the sale of crayfish is because crayfish have been flooded in Japan, so this phenomenon has seriously affected the local ecological environment in Japan, if this situation is allowed to continue to develop, it is likely that the local ecological environment in Japan will be more damaged, and eventually affect the reproduction of local organisms in Japan, so Japan will formulate such laws and policies, hoping to restore the local ecological environment in Japan as soon as possible.

Japan was a country that did not have crayfish before, the reason why crayfish will be introduced, because people in Japan in the last century are very fond of eating bullfrogs, many bullfrog farmers eventually take the crayfish from the United States as bullfrog feed to breed, which greatly improves the yield and quality of bullfrogs, but later, these bullfrog farmers closed their farms for some reasons, crayfish became homeless, and then, these crayfish survived wantonly in the wild in Japan, This is the phenomenon of crayfish flooding, so the local crayfish in Japan is flooded, mainly because the Japanese did not think too much about the introduction of crayfish, and they did not expect crayfish to have such a big impact on them.