Speaking of carp, in fact, many small partners have a hard time distinguishing it from some common fish such as grass carp and silver carp that we usually see.
Commonly known as carp, carp is a species of carp in the cyprinid family, which, along with grass carp, bluefish, bighead carp and silver carp, have become the five most common species of fish in the Chinese fish market. At the same time, the history of carp in the mainland is also quite long, since ancient times there are legends about carp, that is, carp jumping dragon gate, it is said that carp can transform into a real dragon as long as it can jump over the dragon gate.
Therefore, many parts of the mainland have the habit of releasing carp, and people pin their good wishes on carp, hoping that one day carp Jackie Chan can bless themselves and their families.
Carp are distinguished from other freshwater fish by their long, flattened sides, slightly raised back, broad tops, dark grey or yellowish brown on the back of the body, and a slight yellowish-green flank, while the abdomen is light gray or silvery gray, and the most significant feature of the carp is the slight golden yellow of their pectoral and ventral fins.
Carp mainly live in freshwater waters, are omnivorous fish, they are very adaptable to the environment, both hardy and hypoxia- When the food is abundant, they eat small fish, take aquatic grass as an ingredient, and when the food is not abundant, they can only eat aquatic grass and grow white and fat.
But even so, carp has not been able to flood the mainland, mainly because the mainland has been eating carp since ancient times, and carp is regarded as a treasure in food, and now there are different carp cooking methods in various parts of the continent, so carp is not so easy to flood.
Carp in China can only obediently be a fish to be slaughtered, so why can carp easily occupy the Great Lakes basin when they arrive in the United States, and where do these carps come from?
The Great Lakes Basin can be said to be an important water source for the survival of americans, and as early as the last century, due to the development of american industrialization, the water eutrophication of the Waters of the Great Lakes led to the surge of algae in the Great Lakes region, which seriously affected the drinking water needs of local residents.
In the 1960s, the United States was worried about dealing with the problem of algae in the Great Lakes, because it was not a way to eliminate these algae with drugs, and a natural biological gram method became a necessity at that time.
Subsequently, the Americans learned that Asian carp can easily dispose of these algae, so without saying a word, they began to introduce carp from China and other Asian regions into Arkansas, and the initial effect was also very obvious, the purification effect of carp on these water sources was very obvious, so many fish ponds began to follow suit.
However, after the 1980s, due to improper management, some Asian carp escaped, they left the limited waters, and their footprints began to spread throughout the major waters of the United States, because there was no limit, and with the tenacious vitality of the carp, the carp began to breed wildly, which is the main reason for the flooding of carp in major rivers and lakes in the United States.
Even in these rivers, there is no natural enemy of carp at all, this carp is suddenly open to eat, the average adult carp in the local area can grow to dozens of pounds, and even some overlord carp can grow to 100 pounds, the body length is more than one meter.
Carp has no chance to flood the mainland at all, and it has become a delicacy on the table, but the Asian carp imported by the United States has been flooded, so what measures has the United States taken to deal with this?
Carp is rampant in the United States, and in order to deal with these situations, the United States has adopted different governance methods. In 2002, the U.S. military, in conjunction with local fisheries departments, implemented a power grid plan to build three power grids in the Chicago Canal to prevent them from escaping to other river basins.
In addition, the local government also encourages residents to hunt carp, and there will be rewards for hunting a certain number, so residents near some rivers will hold various hunting competitions every year, some with bows and arrows, some with flying marks and fishing nets, but no matter what kind of means, it has little effect on the large population of carp.
In 2009, the forced U.S. officials began their own "riot operation", they began to put fish vine ketone toxins into the river with carp, but they did not expect that this was a set of "seven wounded fists", injuring 100 enemies and losing 10,000, this toxin directly caused tens of thousands of local fish in local rivers to die, and Asian carp only died a few.
In 2017, the grid plan also failed, as locals caught carp on the other side of the grid, and in 2019, carp was also found in Chicago Lake. Since then, almost all of the waters of the United States have been occupied by carp.
Some friends may be curious, why don't they learn from us in China to make carp into a delicacy, this is mainly because Americans first can not cook carp, the fish made is fishy and chai, not at all their favorite taste, at the same time carp has a lot of thorns, a little attention will be stuck, for Americans who are accustomed to eating marine fish, they would rather not eat fish than eat carp.
At present, the United States has taken corresponding governance measures, but it is far from being able to restore the ecology to its original appearance.