Species flooding is a biological disaster for human beings, which will have a serious impact on local ecosystems and biological resources. The main reason for species flooding is that a certain species has arrived in a new living environment, and there are no natural enemies in the wild, or there are very few hostile species that limit themselves. Species have a tendency to over-reproduce. If the food resources and living space are sufficient, the number will increase significantly.

In a normal ecosystem, all species are in a stable state formed after a long period of development and evolution. There are natural enemies of their own, and they will also be natural enemies of other species. In such a stable system, their respective numbers will not be large. Changes can only fluctuate within a certain range.

There are many typical species invasion and flooding events in the world. For example, the European hares, which frightened Australians, reached 10 billion at one time. After more than a century of hard work, their numbers have been stabilized until today. But the hare infestation still has an impact. In addition, there are Asian carp that are flooding in the United States. Not only are they large in number and huge in size, Americans do not like to eat fish, and carp are extremely adaptable in the new living environment.

However, there are many failure examples in China. The most typical one is crayfish. Not only did it not affect our life and ecosystem, but it became a unique delicacy in China. Both spicy and garlic are very delicious. Invasive species Crayfish did not flood in the wild, and at the same time formed a large scale of farming and became an economic species.

Recently, another alien species appeared in Sichuan Province, China. They are sunfish. Fishing enthusiasts from Chengdu shared their experiences on the Internet, saying that they fell into a large number of sunfish in the reservoir in a short period of time. Sunfish, and they are not small in size. This phenomenon has occurred in many places in Sichuan Province, and it seems that sunfish are showing signs of explosive growth.

The sunfish originates in North America and is mainly distributed in the United States, Canada, Mexico and other countries. It is a species with strong survival ability.

Why Sunfish Growth Is Interesting

The reproductive strategy of sunfish is better than that of many fishes, which also makes it difficult for other species to threaten sunfish. The reproduction of sunfish is very interesting. Generally, the male fish builds a circular nest at the bottom of the water, and then waits by the edge of the nest. When a female fish of the right age swims near him, he will immediately chase it until If Lang has a loving daughter, the female sunfish will enter the nest to lay eggs. Generally, the number of eggs laid will exceed 10,000. If the males feel that they are not enough, they will invite other females to come and lay eggs.

After that, the male fish will always guard his nest, waiting for the birth of the young fish. This rather special method can try to prevent its own fish eggs from being eaten by other animals. On the contrary, sunfish will try to eat the eggs of other fish as much as possible to reduce the number of competitors.

These characteristics of sunfish make them a fearsome species, especially when they have just arrived in a new living environment, there are very few species competing with them, coupled with their super reproductive ability, their numbers will increase rapidly. A large number of sunfishes will quickly reduce the number of other fishes, because they like to eat the eggs and young of other fishes.

The sunfish once came to Japan as an invasive species. In the 1950s and 1960s, the Japanese crown prince Akihito visited Chicago, and the mayor of Chicago gave him the sunfish as a gift. After returning to Japan, the sunfish was handed over to the Fish Research Institute. After successful breeding, the sunfish was put in large quantities in Lake Biwa, the largest lake in Japan, for breeding. The tragedy began on this day. The number of sunfish increased rapidly. It didn’t take long for Lake Biwa to be almost full of sunfish. Many other fish were suppressed by sunfish.

Sunfish was introduced to China as an economic species for farming

There are sunfish breeding bases in many provinces in southern China, so it is inevitable that sunfish will leave the breeding base and enter the wild environment through various means. The development of the water system has allowed them to appear in more places. There is no place to breed sunfish in Sichuan Province, but at present, sunfish have begun to breed in reservoirs in many places in Sichuan.

But this does not cause foodies to worry. As an invasive species, sunfish is different from scavengers. Their meat is delicious and there are fewer spines, so they are also called "sun perch". As the name suggests, they are comparable to perch. Sunfish meat is also relatively rich in nutrients, which can meet people's daily needs. At present, their price in the market is not low, which means that the supply is a bit in short supply. I believe it will not take long. The invasive species sunfish will soon be treated like crayfish Same.

I believe that sunfish cannot swim out of Sichuan safely, and it will only become a delicacy. However, the invasion of species is extremely destructive to the local ecological environment and biological resources, so it must be dealt with with great care.