EDIT: Corner
In the past few days, "strange fish" have appeared in a lake in Ruzhou, Henan, and pumping fishing has aroused concern and heated discussion. After capture, it was determined that the "strange fish" was an alligator eel, native to North America, a freshwater giant carnivorous fish with few natural enemies and strong fecundity, and was an invasive alien species. In recent years, Guangdong, Guangxi, Fujian and other places have found this "uninvited guest". Crocodile eels on the other side of the ocean appear in many parts of the country, sounding the alarm for the prevention and control of invasive alien species. So in addition to alligator eels, what other invasive aquatic animals and plants should also be worthy of our vigilance?
In fact, not only crocodile eels, a census of invasive aquatic animals is being carried out in many places.
According to the news released by the Jiangsu Freshwater fisheries research institute a few days ago, from August 11 to 13, researcher Li Daming, deputy director of the Resources and Environment Research Office of the institute, led Assistant Researcher Liu Yanshan and other department members to Carry out a census of invasive aquatic animals from outside the lake. The census was carried out in strict accordance with the "Technical Regulations for the Survey of Agricultural Invasive Alien Species (Trial)", and set up 8 inspection points, such as the mouth of the Taihu Canal Lake, the mouth of the Wunan River, the mouth of the Mengjin River, the mouth of the Huangli River, the mouth of the Beiganhe Lake, the mouth of the Zhanghe Lake, the low-carbon wetland park of The Penghu Lake, and the Peng harrier Wetland Park, focusing on the investigation of 10 exotic aquatic animals such as Qi's tilapia, leopard-patterned winged catfish, managua lily fish, crocodile eel, mosquito-eating fish, striped carp, Fushou snail, large crocodile turtle, Brazilian red-eared turtle, and bullfrog.
Guangxi Zhuang Autonomous Region has carried out a census of agricultural invasive aquatic animals in the whole region, and plans to comprehensively find out the number, distribution range, occurrence area, degree of harm and other conditions of agricultural invasive aquatic animals by the end of 2023, and build an information database on invasive aquatic animals to study and judge the trend of invasion and spread of alien aquatic animals. According to the Implementation Plan for the Survey of Agricultural Invasive Aquatic Animals in Guangxi, 18 species of animals, including crocodile eels, scavengers, tilapia, and red-eared painted turtles, were surveyed according to the Fishery Administration Command Center of the Autonomous Region.
Recently, Shanghai Chongming also launched the implementation of the census of invasive aquatic animals. According to the work plan of the Municipal Aquatic Products Station, Chongming has a total of 12 townships and 216 inspection points (paddy fields and their ditches) included in the scope of the census, and the objects of the inventory are Fushou snail, brown cloud agate snail (African large snail), bullfrog, red-eared painted turtle (Brazilian turtle), Protocrayfish (crayfish), largemouth black perch and other 15 species of exotic aquatic organisms, mainly grasping the number, distribution range, occurrence area, degree of harm and other 15 species of alien aquatic organisms.
According to the news released on the website of the Department of Agriculture and Rural Affairs of Zhejiang Province on June 13 this year, the Department of Agriculture and Rural Affairs of Zhejiang Province recently issued the Implementation Plan for the Census of Invasive Aquatic Animals in Zhejiang Province to comprehensively deploy and promote the census of invasive aquatic animals in Zhejiang Province. According to the requirements of the census of invasive aquatic animals of the Ministry of Agriculture and Rural Affairs, combined with the actual situation, Zhejiang Province takes the eight major river systems as the main line, focusing on the census of 6 invasive species such as tilapia, leopard-striped winged catfish, crocodile eel, Fushou snail, red-eared painted turtle (Brazilian turtle), bullfrog and other foreign species that need attention, such as protocrayfish. The census work is divided into inventory, investigation and detailed investigation. Among them, the inventory is required to be completed in early June, completed at the end of July, and completed by the end of October.
It is not difficult to see that the list of the following most common animals and plants is mainly listed in the provinces and cities in the list of invasive alien aquatic animals: (including but not limited to the following species)
Alligator eel
Red-eared painted turtle (Brazilian turtle)
Leopard-print winged catfish (scavenger)
Tilapia
Fushou snail
bullfrog
Protocrayfish (crayfish)
Water hyacinth
Piranha
Large alligator turtle
Managua Lisa (Freshwater Grouper)
Mosquito-eating fish
It can be seen that invasive alien species frequently appear in many parts of the country, indicating that there are still omissions and shortcomings in the relevant prevention and control networks. Especially in recent years, with the increasingly frequent commodity trade and personnel exchanges in the mainland, the vigorous development of international logistics, and the rise of the pet economy, the ways of the spread of invasive alien species have become more diversified and concealed, and the problems of large risk of invasion of alien species and difficulties in prevention and control have become prominent. The continent is vast and has a diverse climate, and most invasive species can find a suitable living environment, and once colonized, it is difficult to completely eradicate.
Therefore, I would like to remind netizens and farm operators that when raising exotic aquatic species as pets or as business products, they should not be easily discarded in public waterways and rivers and lakes, so as not to cause destructive impacts on the normal ecological water environment of the mainland.
References:
People's Daily ""strange fish" appears at many points, and the prevention and control of invasion of alien species should be strengthened and upgraded"
Guangming Daily, "Launch a census of invasive aquatic animals in many places, not limited to crocodile eels"
The Paper's "Guangxi Lists 18 Species of Invasive Aquatic Animals: Crocodile Eels Have Been Found in Many Rivers"