According to news reports, traces of sunfish have recently been found in several large reservoirs in Sichuan. The person in charge of the Fisheries Administration Department of the Sichuan Provincial Fisheries Bureau responded that there are indeed sunfish in Sichuan at present, but the number is not huge, and it will not flood for the time being. During the fishing ban period of the next decade, the monitoring and assessment of various aquatic populations, including alien species, will be increased.
Is it really as experts say? Because recently, many anglers in Chengdu have caught sunfish in the reservoir, they feed fiercely, are a stuffy type, so there are still many fish, it is said that these sunfish are not small, most of them are around two or three.
There are also fishing experts who can catch more than 100 fishes in a day in the shuangliu river alone. According to fishing enthusiasts, sunfish have been found in many large reservoirs in Sichuan, and the trajectory of movement has increased, and the population seems to have signs of explosive growth.
Sunfish are native to North America and are widely distributed in Canada, the United States and Mexico. The body length is 12 to 20 cm, some individuals can grow to 40 cm, under normal circumstances, the weight is 50 to 100 grams, and the large individual can grow to 2 kg. Relative to the proportion of the body, the mouth is still relatively large.
Like the well-known tilapia, male sunfish also dig a circular nest under the water as a stronghold to attract female sunfish, and when a mature and unfoculating female swims by, the male follows and tries to drive the female into the nest to spawn and fertilize. The female leaves after spawning, but the male stays by the nest until the fry hatch.
It is said that the flood of sunfish in Japan is mainly man-made, and at first the sunfish still lived well in the United States. In 1960, Crown Prince Akihito of Japan visited the United States, but the mayor of Chicago gave him it as a gift. As a common edible fish in the United States, Akihito praised it after tasting it, so he decided to promote it as a high-quality freshwater fish in the country.
From 1963 to 1964, sunfish were stocked in Lake Biwa, Japan's largest lake, for further breeding, and occupied 1/5 of the waters of Japan in just 6 or 7 years. By around 2000, its footprints had reached the moat of the Imperial Palace in Tokyo, Japan, and the extent of flooding elsewhere can be imagined.
Fortunately, the sunfish is an edible fish, so it has been sent into hotel restaurants, made into a variety of cuisines, and at first provided a good food choice for the public. But with the passage of time, Japanese foodies have stopped being interested in sunfish, mainly because there are too many to eat, while at the same time, sunfish in the wild are flooded.
As a result of the flood, they will continue to consume nutrients in the water, and a large number of aquatic organisms will be eaten, and most freshwater fish with the same diet as them will not eat. And want to compete with the sunfish is also very difficult, to the well-known salmon as an example, even such a fish have lost, the strength of the sunfish can be imagined! In the face of the hurt of his beloved scorpion, Emperor Akihito also apologized for the incident.
The reason why the sunfish eat and drink in the living area so brazenly is due to their "real ability", without two brushes, it is presumably impossible to flood in Japan, nor can it gain a foothold in China, where foodies are all over the world. To a certain extent, the sunfish is more terrifying than the tilapia, mainly because of these 3 "skills".
First of all, sunfish can spread throughout the major waters in a short period of time because they are not picky about eating everything, and even eat the eggs of other fish. The reproductive capacity is fast, and it can lay 10,000 to 60,000 eggs at a time, and they can hatch after a few days. The most important thing is that the living water temperature range is very wide, and it can survive in water from 1 to 38 ° C.
Sunfish were introduced to China in 1987 and were still hot when they first went on the market, but after decades of development, sunfish not only spread throughout the southeast coastal area, but also migrated to the inland. In addition to Sichuan, large numbers of sunfish appear in many places such as Linyi and Weihai in Shandong, Guilin, Liuzhou and Hunan in Guangxi. The reason why they are more terrifying than tilapia is that they are very hardy, and as long as the temperature is suitable, it is only a matter of time before they flood.
Secondly, the flood of sunfish also benefits from release. There are two main aspects, on the one hand, passive escape, that is, some places where sunfish are farmed, due to human management omissions or natural disasters such as large waters, resulting in sunfish flowing into wild waters. On the other hand, it is purely artificially released, because the appearance of the sunfish is very good-looking, especially a species called "Chang'e", so it has become a fragrant feast in the hands of aquarium lovers, but it is definitely released after aesthetic fatigue.
But this release is not worth advocating, or even prohibited by law, because sunfish are invasive alien species. Amendment (11) to the Criminal Law, which came into effect on March 1 this year, stipulates: "Whoever, in violation of state regulations, illegally introduces, releases or discards invasive alien species, if the circumstances are serious, shall be sentenced to fixed-term imprisonment of not more than three years or criminal detention, and shall also be fined or fined alone." "The Biosecurity Law of the People's Republic of China stipulates that no unit or individual may introduce, release or discard alien species without approval. Otherwise, the introduced alien species will be confiscated and a fine of between 50,000 and 250,000 yuan shall be imposed.
Finally, the problem that anglers are more concerned about is to follow the pace of the ban on fishing in the Yangtze River, and many natural waters have begun to "popularize" the ban on fishing, which is intended to be good. From the prohibition of fishing to reflect on the invasion of sunfish, may do more harm than good, if you see the sunfish in the wild, it is best to kill it, but if you see it in the forbidden waters, what to do? If you can't catch it, then you can only watch it "get away with it" and go to Hoho and other fish eggs. Of course, we are even more reluctant to see them invade the waters of the Yangtze River, otherwise the consequences will be unimaginable.
Our country has a "national treasure" group, that is, a "foodie" group, and the problem of invasion of alien species that cannot be solved by other countries does not exist in our view, because we have a trick, that is, a "eating" it. The most typical example is the crayfish, as early as 2017, the production of crayfish has exceeded one million tons, and more than 40 billion crayfish have been loaded into the Chinese stomach. The variety of ways to eat is eclectic, with spicy, spicy, thirteen spices, minced garlic, and braised crayfish in oil and other flavors.
But even so, it seems that crayfish have been eaten to be protected, but in fact this is just the tip of the iceberg, because the wild crayfish still show a local flood, and recent reports show that their footprints have spread to 19 provinces and municipalities across the country. The main reason is that they are not good-looking, they are not favored by foodies, and they are lawless in the wild environment.
The first crayfish were introduced to our country in 1929, so they have been living with us for nearly a century, but they still can't completely eliminate them. Not to mention the same "excellent" sunfish, although they have few thorns and delicious taste, rich in nutrition, our big chefs can also make a lot of flavors, but want to rely on eating to solve, the strength is still not enough.
Not to mention that the current Yangtze River Basin has entered a ten-year fishing ban period, all kinds of fishing and fishing are explicitly prohibited, the starting point is good, but if the sunfish mixed into the Yangtze River, and let it develop, wait until ten years later to fish, not to mention that only sunfish are left in the water, but also to the extent of flooding.