The proliferation of species is a biological disaster for humans, which will have a serious impact on local ecosystems and biological resources. The main reason for the proliferation of species is that a species has reached a new living environment, and there are no natural enemies in the wild, or there are very few hostile species that restrict themselves. Species have a tendency to over-multiply, and if the living space of food resources is satisfied, then the number will increase significantly.
In a normal ecosystem, all species are a stable state formed after a long period of development and evolution, there are their own natural enemies, and they will also be natural enemies of other species, in such a stable system, their respective numbers will not change greatly, can only fluctuate within a certain range.
There are many typical species invasions and floods around the world, such as the European hare that frightens Australians, which reached a maximum of 10 billion at one time, and after more than a century of fighting, it has stabilized their numbers today, but the flooding of hares still has an impact. In addition, there are Asian carps that are flooded in the United States, which are not only numerous and large, Americans do not like to eat fish, and carp are super adaptable in new living environments.
But in our country there are many examples of failure, the most typical is the crayfish, not only did not affect our lives and ecosystems, but has become a unique Chinese cuisine, whether spicy or garlic are very delicious, invasive species of crayfish, in the wild did not flood, but also formed a larger scale of breeding, into an economic species.
Recently, there is an alien species in China's Sichuan Province, they are sunfish, fishing enthusiasts from Chengdu shared their own experiences on the Internet, saying that they fell in the reservoir in a short period of time, and they are not small. This phenomenon occurs in many parts of Sichuan Province, and it seems that sunfish are showing signs of explosive growth.
Originating in North America, the sunfish is mainly distributed in countries such as the United States, Canada and Mexico, and is a highly viable species.
The breeding strategy of sunfish is superior to that of many fish, which also makes it difficult for other species to threaten sunfish. The breeding of sunfish is very interesting, generally male fish in the bottom of the water to build a circular nest, and then on the edge of the nest to wait for the rabbit, when there is a female of the right age to swim to their own vicinity, it will immediately chase, until the lang has a lover intention, the female sunfish will enter the nest to lay eggs, the general number of eggs will exceed 10,000. If the male does not feel enough, he will invite another female to come and spawn.
After that, the male will keep watch over his nest and wait for the baby fish to be born. In this special way, you can try to avoid your own fish eggs being eaten by other animals, and on the contrary, the sunfish will eat the eggs of other fish as much as possible to reduce the number of members of competitors.
These characteristics of the sunfish make them a frightening species, especially when they have just arrived in a new living environment, there are few species that compete with themselves, coupled with their super reproductive ability, the number will rise rapidly. Large numbers of sunfish become active and quickly reduce the number of other fish because they prefer to devour the eggs and seedlings of other fish.
Sunfish once came to Japan as an invasive species, and in the 1950s and 1960s, Crown Prince Akihito of Japan visited Chicago, the mayor of Chicago gave him the sunfish as a gift. Upon their return to Japan, the sunfish were handed over to the Fish Research Institute, and after successful breeding, the sunfish were stocked in large quantities at Lake Biwa, Japan's largest lake, for culture. The tragedy also began on this day, the number of sunfish grew rapidly, and it was not long before Almost all of Lake Biwa was covered with sunfish, and many other fish were suppressed by sunfish.
Many provinces in the southern region of China have bases for breeding sunfish, which cannot avoid sunfish from escaping from the breeding base in various ways and entering the wild environment. The development of the water system has allowed them to appear in more places, and there is no place for sunfish to be farmed in Sichuan Province, but at present, sunfish have begun to breed in reservoirs in many parts of Sichuan.
But this did not cause foodies to worry, sunfish as an invasive species and such as scavengers, their flesh is delicious and less thorny, so it is also known as "sun perch", as the name suggests can be comparable to perch. Sunfish meat nutrients are also relatively rich, can meet people's daily needs, the current price in the market is not low, a bit of short supply, I believe that it will not be long, invasive species of sunfish will soon be the same treatment as crayfish.
I believe that the sunfish cannot swim out of Sichuan safely, but will only become a delicacy. However, species invasion is extremely destructive to the local ecological environment and biological resources, so it is also necessary to deal with it with great care.
Text/science black hole, image source network intrusion deletion.