6000 bugs in a snail!What can I snail?

Review expert: Li Weiyang

Well -known science writer

In the summer, I can't help but remind people of those hooked foods in the night market: stir -fry field snails, spicy crayfish, fried chicken, skewers ... especially the field snails. Come to a cup of beer is a beautiful thing in the hot summer.

Source 丨 a shopping website

I have to say that Tianluo is really a deliciousness suitable for chatting party. As long as one hand, you can complete all the process from picking up sucking to eating meat and throwing shells, and does not affect the other hand -brushing mobile phone or holding a cup -except one point: the small field snail snail meat is too little really too small Although the taste is delicious, it always feels a bit not enjoyable. Some friends think, if there is a kind of big meat, wouldn't it be beautiful?

The good news is that the big snails are really available, but the bad news is ... not to eat! This kind of joyful snail is the famous Pomacea Canaliculata.

What is Fushouluo? Why not eat?

Fushou snail belongs to the bottle snail family (also known as AMPullariidae), which is a omnivorous freshwater snail. Including Fushou snails, there are many types of snails (and individuals with color mutation) that can be seen on the ornamental fish booth of the flower and bird market. It is a very common ornamental snail. In addition, in some countries and regions, Fushou snails are also used as edible snails. For example, some foreign video bloggers often upload videos of cooking Fushou snails (however, there are serious hidden dangers in some videos, everyone must not imitate) Essence

Screenshots of Foreign Fushou Luo Eating Broadcast Video

Source 丨 foreign video blogger Hagna

In fact, Fushouluo was originally introduced to all parts of the world in order to be used as food and feed. However, as a ingredient, Fushou snails have considerable risks: Unlike the field snails we often eat, Fushou snails have a high degree of infection with Guangzhou tube roundworm. Some screws have up to 6,000 larvae in Guangzhou. In addition, they will carry many other types of parasites. If they are not cooked, there will be risk of infection with parasites.

According to a survey report published by the Chinese Popular Diseases Magazine in 2011, among the four common freshwater snails surrounding Erhai Lake, the infection rate of Guangzhou tube round nematodes in the Fushou snails is as high as 11.5%, which is much higher than the 3%of the second Hermail of Er snail. Essence

Guangzhou tube circular width

Source 丨 Weiki

In addition, Fushou snails have another feature, that is, when it is completely cooked, the snail meat will become dry and firewood, and it seems to chew the rubber. After the risk, it also avoided the favor of diners. In this way, it is not surprising why such a large freshwater snail rarely appears on the menu menu.

In fact, in 2006, Beijing broke out once in Guangzhou. At that time, in order to save costs, a restaurant used a lot of cheap meat snails to replace the conch meat used to make cold screw slices. At the time of production, just used boiling water to simmer the snail meat and put it on the table, causing the parasites in the snail to be eaten by the diners without being killed, and then evolved into a public health incident that caused more than 160 people.

The news page of parasitic infection caused by Fushou snails in 2006

Source 丨 News Picture

Since then, Fushouluo has basically disappeared from the menu of the market and restaurants. Although the Fushou snails sold occasionally on the vegetable market in the southern my country, they are usually not welcomed because of parasites and meat problems.

Fushou snail on the market in Southeast Asia

Source 丨 pixabay

How to distinguish the Fushou snail and field snail?

Some friends think that the Fushou snails and the field snail are rolling freshwater snails. They look very similar. So how to distinguish the field snails that can be eaten at ease and dangerous Fushou snails?

First of all, the most intuitive point is that most of the field snails we eat are mostly Chinese round field snails and Chinese round field snails, as well as square stone field snails commonly used in snail powder. The size of the knuckle; the Fushou snail can grow quite large. The height of the snail shell can reach 7 cm and the length can reach more than ten centimeters, which is equivalent to the size of a small apple or oil peach!

The comparison of Fushou snails and two field snails

Source 丨 Claude & AMANDINE EVA

If you don't look at the body shape, you can also distinguish the Tianluo and Fushou snails through other methods: for example, the tail of the field snail is relatively pointed, and the Fushou snail tail is flat; the shell of the field snails is generally green, and the Fushou snail shell is yellow -brown. Some field snails will produce young snails through egg tires. The egg blocks of Fushou snails are obvious pink and are produced on the water surface. More flat ...

Comparison of Fushou snails and field snails

Source 丨 Fushouluo's biological characteristics and prevention

There is also a easier way to help judge Tian snails and Fushou snails. The growth rate of the field snails is slow. Therefore, the snail shell is relatively heavy and strong, and it is easy to pinch. Pinch. If a large field snail and Fu Shou snail are found in the vegetable market, as long as they pinch their snail shells, they can simply divide them.

How destructive is Fushouluo? Aside from the parasites carried by Fushou snails, they are also a kind of invasive species and agricultural pests with strong destructive power. In the list of 100 foreign invasive species of the World Nature Conservation Alliance Species Species, Fushou snails ranked among them. The State Administration of Environmental Protection of my country has also listed Fushou snails as one of the major dangerous agricultural invasive creatures.

In Southeast Asia and Hawaii, a large number of invasive Fushou snails eat crops grown in water, such as rice, leading to severe economic losses. In 1979, an overseas Chinese introduced Fushouluo's eggs to Taiwan Province for promotion and breeding. Later, Fushouluo's tender stems and seedlings that were eaten by Fushou snails that were abandoned by farmers, causing a loss of up to NT $ 5.1 billion.

Not only that, as a very successful invasion species, the Fushou snail will also greatly squeeze the living space of the native freshwater snail, and even cause the local freshwater snail extinction.

Fushou snails in the pond in Xiamen Park

Source 丨 Author

With the rise of summer temperatures, Fushou snails in many places have begun to lay eggs. If we see a piece of pink objects attached to the stones or plants on the water, it is undoubtedly the egg of Fushou snail.

The eggs against Fushou snails can be dumped directly into the water. The eggs of Fushou snail can only be hatched by the water, and it will be drowned when it falls into the water. In addition, they can also throw them into a dry zone away from the water to kill them, or simply crushes the eggs directly.

Fushou snail egg

Source 丨 Baidu Encyclopedia

As for the adult Fushou snails in the water, in addition to capturing mashing, some parks and farmland will also kill them by spraying drugs. More environmentally friendly practices also include artificial collection of Fushou snails to make animal feed. In recent years, Fushouluo has also been found in some parks in Beijing. If we see these annoying guys when we go out to play, we can also eliminate them.

- END -