Recently, "Strange Fish" crocodiles have been found in many places!What is it?

More than a month ago, a "strange fish" appeared in Yunzen Lake in the Central Park of Ruzhou City, Henan Province. It was identified by relevant departments to confirm that it was a crocodile of foreign species. After nearly a month of pumping, the crocodile bird was finally caught on the evening of the 26th and was dismissed.

Except for Ruzhou, Henan, in the past month, Beijing, Hunan, Guangxi, Jiangsu, Qinghai, Ningxia, Yunnan, Shandong and other places have reportedly found that crocodile crickets are distributed in urban communities or parks. Reports of fish and children. What exactly is the crocodile? Why must you catch it?

Crocodile Town Bad native to North America

Lack of natural enemies in China

It took nearly a month in Ruzhou, Henan to dry the lakes of nearly 300,000 cubic meters of Yuncong Lake, so that the two crocodile birds "appeared". Some netizens have asked questions, is it worth such a big move? Why is this fish caught?

Li Chang, the curator of the Zhengzhou Natural Museum and professor of biology, said, "The crocodile lack of natural enemies in China, its individual is very large. General aquatic animals are not its opponents. Causes the food chain to break. "

Crusadus is native to North America. It is a kind of freshwater giant carnivorous fish. The body length of adults can generally grow to 1.5 meters. It is fierce and lacks natural enemies. It can produce tens of thousands of fish eggs per year. In addition, the crocodile bird "does not picky eaters", as long as it is a living creature in the water, it is almost all eaten. Its hard fish scales can help it avoid the predation of many fierce meat animals, so it is at the top of the food chain.

Cheap price, release everywhere

Let the crocodile sparrow distribute "bloom everywhere"

Crocodile tadpoles are suitable for living in tropical areas, but why does it appear in Henan, Ningxia, Shandong and other places? Gu Denan, an associate researcher at the Institute of Pearl River Aquatic Research Institute of the Pearl River Aquatic Products of the Chinese Academy of Fisheries Science and the national freshwater fish industry technical system, explained that the experts of the invasion prevention and control positions of the invasion and control positions of the invasion and control positions of the crocodile cigarettes were introduced as an ornamental fish. , But the crocodile cricket grows fast, many people will discard it because they cannot provide enough space to raise it.

"The field distribution of crocodile crickets is‘ blooming everywhere ’, but there are not many places.

Gu Dangen said that crocodile crickets have wild distribution records in Guangdong, Guangxi, Fujian, Henan, Sichuan, Jiangsu and other places. The ornamental fish markets and farms across the country are also breeding this variety. Buy, and conventional sale and purchase of crocodiles do not violate the law. One important reason why crocodile can appear quickly in many places across the country is that consumer purchase threshold is low, but the release behavior is out of control.

△ Screenshot of a online shopping platform sells crocodile crickets page

According to Gu Dang En, as a top predator, crocodile crickets have serious consequences after being released. "There are long -term adaptation processes of predators and predators. There are also many predators in our homeland, but during the evolution, those predators have a certain response strategy. There is no response strategy. In Guangdong, some fishermen took the water to catch the fish at the end of the year, and found that the fish was gone because there was a crocodile in the water. "

Gu Dang En emphasized that if the crocodile crickets are cultivated in the aquarium after the introduction, they will not allow them to enter natural water bodies, they will not establish a population, and they will not cause harm.

Isn't the crocodile cricket be a "foreign invasion species"?

As early as 2020, the crocodile crickets were on the list of major foreign species "blacklists" for the ban on or abandoned in my country;

This year, the Ministry of Agriculture and Rural Affairs and other relevant departments formulated the "Notice on Printing and Distributing the General Plan for Foreign Invasion Species Census" to conduct a national census of 10 major foreign aquatic creatures, including crocodile crickets;

The "Biological Safety Law of the People's Republic of China" officially implemented on April 15, 2021 stipulates the content of preventing foreign species invasion and protecting biodiversity, and requires the formulation of foreign invasion species lists and management methods.

So, isn't the crocodile cricket be considered "foreign invasion species"? What is the difference between "foreign species" and "foreign invasion species"?

Ren Dapeng, a professor at Agricultural University and Director of Agricultural and Rural Legal Research Center, said that "foreign invasion species" and "foreign species" are two different concepts. "Foreign species" may not be "invading species", and whether it belongs to "foreign invasion species" requires long -term scientific assessment.

"Regardless of whether it has the characteristics of the invasion, as long as it is a foreign species, there are also strict regulations in the" Biological Safety Law of the People's Republic of China ", that is, no unit or individual shall not be introduced, released or discarded without approve It has been introduced, consumers or residents have been cultivated. According to the law, they are not allowed to release in the wild at will, nor can they be discarded at will. For this reason, Article 81 of the "Biological Safety Law of the People's Republic of China" also specifically stipulates strict strict provisions Legal liability, clearly release or discard foreign species without authorization, imposed a fine of 10,000 yuan and 50,000 yuan. "

Gu Dang En added that "When the" List of National Key Management of Foreign Species (First Batch) "in 2012, there was no evidence to prove that crocodile crickets could breed in the wild, and the number was relatively small at that time. But the current data. It has been proven that crocodile crickets can be reproduced in the wild. Customs and agricultural departments have already begun to move to prevent these species from introducing them. "

At present, the agricultural and rural departments in many places have started to carry out census for foreign species including crocodile crickets. Experts said that although the crocodile crickets have not been included in the list of foreign invasion species, the latest batch of foreign invasive species list will be announced shortly after, and the crocodile crickets are expected to be included in. Is the crocodile cricket edible?

Expert: The egg is poisonous, you can't eat it!

Some netizens on the Internet joked, "After being caught, the crocodile crickets have to be boiled in oil." In this regard, the experts reminded that the eggs of crocodiles are highly toxic and cannot be joked in "eating". Experts also said that they could not buy crocodiles for a while, and then they were released on the pretext of "goodness". If farming cannot be made after purchasing, you can commission colleges, scientific research institutions, and relevant departments to deal with it. If crocodile crickets are found in the community, parks and other places, report it as soon as possible, and the local management departments are caught and cleaned up, and it is harmless.

Ren Dapeng said that preventing foreign invasion species requires the common participation of the whole society. "Related organizations and individuals must first abide by the provisions of laws and measures, and cannot blindly introduce foreign species; if they really need to be introduced, they should perform strict approval procedures. For citizens, no matter whether foreign species are harmful, they must not be harmful. Randomly introduce, release or discard. "

- END -