Guanlan Pavilion ｜ "Weird fish" underwater, you cannot always rely on "dried a lake water"

□ Li Zhen

Recently, the "strange fish" incident in the waters of Yunchen Lake in Ruzhou, Henan has attracted attention. More than a month ago, local citizens filmed a strange fish with a large body and peculiar pattern in Yunchen Lake. It was identified by relevant departments and confirmed that it was a crocodile of foreign species. After trying various methods, the local lakes of more than 200,000 cubic meters were arrested.

After foreign creatures entering the new district that is suitable for growth, it has developed into an advantageous species, causing the original ecological imbalance, which is worthy of attention. As a kind of freshwater giant carnivorous fish native to North America, crocodile cigarettes do not picky eaters. As long as the living creatures in the water are almost all eaten; the whole body is hard, and it can avoid the threat of fierce meat animals, so it is at the top of the food chain.

In addition to the discovery of crocodile croaks in Henan this time, in the past month, according to media reports, Beijing, Hunan and other places have reportedly reported crocodile crickets in many places; in the past few years, Guangdong, Fujian, Sichuan, Jiangsu and other provinces also have crocodile crickets. Wild distribution records. Faced with the possible spread of crocodile crickets in the natural environment, it is not more to be arrested for a lot of arrests, and it must be contained in it.

The arrest of crocodile cricket belongs to the end governance of foreign species. This is an important stage for controlling biological invasion. It can effectively control the proliferation trend. However, the disadvantages of end governance are also obvious. After waiting, the response cannot fundamentally avoid the occurrence of biological invasion, and its governance costs will be higher. For example, Australia developed an ants to extinguish ants for the diffused invasive species. Relying on "dried a lake water" to control foreign species, it is not a long -term score in both economic and ecological perspectives.

(Picture source: CCTV News)

The key to controlling biological invasion is the possibility of the first point of the gate to prevent foreign creatures entering the natural environment. For example, foreign biological management needs to be further improved. In the legal sense, crocodiles are currently only foreign creatures, and they have not been included in the invasive species list, so they cannot take governance measures such as ban on sale and support. Based on its current situation, it is necessary to speed up the research, investigation, statistics, and evaluation of this species, and take timely and appropriate measures on the basis of the formation of scientific cognition. Private breeding, transportation, and trafficking are prohibited; if it is not enough to constitute risks, it must continue to monitor closely.

For the public, the string of ecological security must be stretched at all times. At present, the crocodile crickets found in various places have a probability that expert analysis is from human release. People buy crocodile crickets as ornamental fish home, but found that their food is large and amazing. As everyone knows, this "release" is actually illegal. The Biological Safety Law stipulates that no unit or individual may introduce, release or discard foreign species without approved. In other words, foreign species cannot be raised if they want to raise them. However, at the actual operation level, it is difficult for the regulatory and enforcement of foreign species to "release" foreign species to achieve time and corners. Therefore, it is very important to carry out the string of ecological security in the whole society to carry out biological invasion related publicity and education to make everyone in the hearts of illegal supervision and reporting in a timely manner. The front end of the back end can better remove the "strange fish" under the deep water.

- END -