Today, the sunfish invaded many places in Sichuan and weibo hot search!
"Menacing"?
Sunfish have been found in several reservoirs in Kawauchi
Recently, the news about the invasion of Sichuan by sunfish has been brought up again. Some fishing media posted that recently an angler from Chengdu caught a large number of sunfish while fishing in the reservoir, and the size is not small. At the same time, the article said that the sunfish is menacing and has been found in many places in Sichuan.
Sunfish are native to the freshwater waters of the southern United States and northern Mexico and are alien species in the country. A fisherman who has been active in the fishing circle for a long time said that at present, there are traces of sunfish in many large reservoirs in Sichuan.
Zhang Zhiying, director of the Fishery Administration Department of the Sichuan Provincial Fisheries Bureau, who has been engaged in fishery administration management for more than 30 years, said that at present, there are indeed sunfish in Sichuan, but the number is not huge, and it will not flood for the time being. "During the next decade of the fishing ban period, we will also increase the monitoring and assessment of various aquatic populations, including alien species." According to its introduction, the source of sunfish is generally artificially released, "Sichuan has not been farmed for the time being." ”
Sunfish
Freshwater fish native to the freshwater waters of the southern United States and northern Mexico. Adults are 24–40 cm long. It is a very adaptable, heterogeneous, high population yield, naturally reproducible fish. Coupled with the good taste, it is popular in many countries, and many countries will also introduce this fish. However, its strong reproductive ability has also led to the occurrence of species invasion events.
As mentioned in several public articles, sunfish have been flooded in Japan and have been in the basins of Japan for half a century. It is gluttonous and fierce, and can survive at water temperatures of 1-38 ° C. Since entering Japan in 1960, by about 2000, it has been all over Japan's lakes, rivers, and sewers, seriously encroaching on the living space of Japan's native fish, and once forcing the country's precious salmon to the end of the road.
Sunfish was introduced into China's inland aquaculture in 1987, because its meat is thick and tender, comparable to sea bass, belongs to the middle and high-grade fish fresh, and has been large-scale aquaculture in Guangdong, Fujian, Zhejiang and other places.
How to deal with it?
Although the disaster has not been successful, it will still focus on monitoring and assessment
So, as the sunfish continues to be discovered, is it possible that it will flood? In this regard, Zhang Zhiying said that for the time being, "in Sichuan, the sunfish have not yet flooded in a large area. ”
Zhang Zhiying introduced that the threat of alien species mainly lies in the destruction of the population of local species, squeezing the living space, and even swallowing fish eggs, resulting in a decline in the number, but it is still difficult to truly achieve "anti-customer-oriented" for the time being. "That is to say, to form a dominant population, natural breeding to a certain scale, and threaten the survival of other indigenous fish."
Although it does not really pose a threat, it should not be taken lightly. Zhang Zhiying introduced that since January 1, 2021, China has entered the ten-year fishing ban period of the Yangtze River, and many water systems in Sichuan belong to the scope of the ten-year fishing ban on the Yangtze River, which is a good time for all kinds of aquatic organisms to recuperate. "Therefore, our next work will also focus on monitoring and assessment, monitoring the growth status of various aquatic organisms, and also keeping abreast of changes in similar alien species in the waters."
Sunfish are delicious and nutritious
The market price is 18-22 yuan / catty!
For the sunfish found in many places in Sichuan, many friends may ask, what kind of fish is this? Can this fish be eaten? Will this fish bring us ecological disaster?
Now let's talk about the origin of this fish. Sunfish are native to freshwater waters in the southern United States and northern Mexico, and adults are 24–40 cm long. Most sunfish have an exceptional color, and the most eye-catching of the beautiful sunfish species is this one known as "Chang'e", whose dazzling metallic blue hue is covered with orange markings, and the dazzling and beautiful eyes have a pair of ear-like patterns at the back, which is their obvious sign. There are about 30 species in total, which are multiple spawning fish. It feeds mainly on zooplankton and aquatic insects, but also eats aquatic plants, small trash fish and small mollusks.
Sunfish meat is delicious, rich in nutrients, according to the analysis, it contains 18.8% crude protein, crude fat 1.15%, the content of 17 kinds of amino acids in its dry matter is as high as 17.68%, and rich in calcium, iron, phosphorus, sodium, potassium and other trace elements, is an aquatic tonic food. The sales price of aquatic products market is relatively stable, maintaining at 18 to 22 yuan / catty. And the listing volume is small, and the supply exceeds demand. The taste is delicious, and more and more diners are favoring it.
Sunfish were introduced from the United States 50 years ago by Emperor Akihito of Japan. In 1960, when he was still the crown prince, he visited the United States, and the mayor of Chicago presented him with sunfish as a gift. This fish is an ordinary edible fish in the United States, or the state fish of Illinois. After tasting it, he found that the fish was delicious, so he sent it to a fisheries research institute in Japan after returning to China, hoping to breed successfully, increase food for the Japanese people, and add new delicacies to the table. Since Akihito was crown prince at the time, the fish was once known as the "prince fish".
The institute carefully bred new fingerlings brought back by the crown prince and in 1963-1964 transferred 1,400 sunfish to local officials for further breeding at Lake Biwa, Japan's largest lake. Unexpectedly, this led to an ecological disaster. These highly viable species multiplied rapidly, and by 2000 had spread across Japan's large and small lakes and rivers, and even the Moat of the Tokyo Imperial Palace had become their territory. Their frenzied devouring of local fish and other aquatic species has pushed Japan's precious crumpled fish to a dead end and unsettling the nation.
I believe that China's fishery department has monitored it, if there will be an ecological disaster, learn from Japan, and everyone will resolutely eat it!
Netizen: If you can eat, you are not afraid of flooding
Can eat, punch duck! (This article is transferred from [Chengdu Business Daily - Red Star News, Diligent De Squad Leader]. If you have copyright questions, please contact [email protected]. ）
【Keywords】:Sunfish biological invasion aquaculture