However, this is not the case. Although one species of fish is native to China, its influence on China even exceeds that of some alien invasive species. Moreover, this kind of fish is not a fierce big fish, but a very small fish. It's called auricularia.
Wheat-ear fish swept through Yunnan
The ear of wheat is a native fish in China, which is native to the eastern part of China. It has a slender figure, a flat body, a long tail, a round abdomen and a small, pointed head. This kind of fish is very small, the adult body length is only 3 1 to102 mm. But don't think it is small, it is easy to bully, and its destructive power is comparable to that of some alien invasive species.
Ears of wheat generally live in shallow water with gentle water flow, and the sound and shadow of this fish can often be seen in rivers, lakes and some ditches. Moreover, the main food of this fish is mosquito larvae, so it has certain anti-mosquito ability. However, when its number increases to a certain extent, its destructive power cannot be underestimated.
I don't know when it began to enter the waters of Yunnan. Because of its strong cold tolerance and adaptability to water pH, it has spread rapidly in Yunnan. Everyone has no vigilance against this small fish, and even many people regard it as an ornamental fish. However, due to the lack of natural enemies and eating fish eggs, many indigenous species in Dianchi Lake have become extinct because of it. Caused a large number of serious species invasions.
Wheat ear fish entered Europe and wreaked havoc in Europe.
Because it can eat the characteristics of mosquito larvae, many countries have introduced wheat ear fish to kill mosquitoes, including some European countries, such as the Netherlands, Poland, Romania and so on. However, the reproductive capacity of this fish far exceeds everyone's expectations. A fish can lay as many as 3000 eggs at a time, and male fish also have the habit of protecting eggs, so that these fish breed in large numbers when they arrive in a new environment, which eventually poses a serious threat to local species. Now this kind of fish is rampant in major rivers in Europe.
Many people are surprised. Generally speaking, fish in water is our food. Why can this fish escape? In fact, some people eat this kind of fish, most of which are used for frying, and few people eat it, so it is of little practical value. Most of these fish are used as feed, so many people are too lazy to catch them, and it is difficult to completely solve the problem by manpower, so that the wheat-ear fish is flooded.