"Don't dare to release it!" The man caught a strange fish: I raised it for 15 years and changed 3 times the fish tank

The sharp and dense teeth, long and flat mouths, scaled bodies, this strange fish hidden in the water has attracted the attention of millions of netizens.

Since mid -July, Henan Ruzhou has exhausted his best to catch monster fish and crocodiles, and even took dry lakes. In the end, a female, one male, two crocodile birds were arrested on August 27, and they were harmless to them.

Coincidentally, the 74 -year -old Guangzhou citizen fisherman Li Shu had caught this "ecological killer" in the Pearl River. However, he remembered the reminder of the experts who could not release it and raised crocodiles at home for fifteen years. Because he knows that once crocodiles enter the natural waters, it may have a huge impact on the ecological environment. In July of this year, the Pearl River Institute of Aquatic Biological Risk Evaluation Center received Uncle Li's crocodile.

The topic of crocodile crickets attracted attention again. The 2020 China Ecological Environmental Statistics show that more than 660 foreign invasion species have been found across the country. my country is one of the countries that are severely harmful to foreign species.

Qianjiang Evening News · Hours Journalist connected the associate researcher Gu Denan, an associate researcher of the Pearl River Aquatic Research Institute of the Chinese Academy of Fisheries Sciences, and listened to the story of dealing with foreign fish with the Pearl River waters.

"Touch fish" at work, "fishing" after get off work,

Self -claiming "old fishermen"

The hot summer weather is the best period of field monitoring -it is the breeding period of many fish, and the population is large and easy to observe. Gu Dangzheng and fishermen carefully checked the fishing nets in the fishing nets. They have done this job for more than ten years.

There were 11 people in Gu Dang En and his team. These days, one of the tributaries in the Pearl River, a point of Xijiang, monitoring foreign fish.

Almost all scientific researchers in this team are "old fishermen". They can be skilled in the river into the river and get off the Internet themselves.

Team member rowing operation

On August 30, they spent three or four hours, and 18 pieces were set up at the point of Xijiang. "When working in the wild, we often fall into the mud pit and make it dirty. Everyone will joke with each other." Gu Dangen said with a smile.

"The scope of foreign species is large. As long as it is foreign, it is a foreign species." Gu Dang En said that only after the invasion can be formed, it can be called an invasive species.

Therefore, what are the types of foreign invasion fishing fish caught in the team? How is the quantity? For a specific type, they will analyze their gender proportions, the number of juveniles, etc. to judge their reproduction in the watershed and data support for preventing and controlling the prevention and control work.

After mastering the specific situation of foreign invasion of fish, Gu Dang and colleagues will conduct various experiments in the institute.

Gu Dang En said that in the face of some foreign fish, the method of biological prevention and control is to allow other fish to control the invasive fish and reduce the number of invasive fish. "We will try, which fish is more efficient in the predation of invasion of fish fry." Because it is to be in close contact with various fish every day, Gu Dang En jokingly said that he was "touching fish at work."

Gu Dangn, who was in the class, liked fishing. He has been fishing since the age of seven or eight, and maybe he has buried the seeds of this line from then on.

Old fishermen caught crocodile,

After fifteen years, the body size has doubled nearly double

"I have been raised for fifteen years in this crocodile, and now I can't support it. I want to find him a place." Li Shu, 74, was worried.

Last month, Gu Dangen received a call from a reporter from Guangzhou TV. It turned out that the citizen Li was a fishing enthusiast and fished in the Pearl River fifteen years ago.

After seeing this strange "duckbill strange fish", Uncle Li consulted the local fishery breeding department and learned that this was one of the top ten fierce fish freshwater fish in the world. If a population is formed in the natural waters, it will seize the growth space of other fish, and the fishery breeding department reminds Uncle Li to release it.

Because of this, Uncle Li took a water tank at home to specialize in crocodile, and it was fifteen years. When he picked it up at the beginning, Uncle Li was measured. The crocodile was 36cm long and his mouth was 6cm long. In fifteen years, because it continued to grow, Uncle Li replaced the fish tank three times.

The crocodile cricket grows fast. When Gu Dang's grace visited Li Shu's house, this crocodile was already a big guy of about 70 cm in length. The lifespan of crocodiles is generally decades, and it is a very long -lived variety in fish.

The crocodile springs are fierce, coupled with the larger body shape. The 74 -year -old Li Shu this year was a bit uncomfortable, but the person who could not find a relay can only ask for help with the media. In July of this year, Gu Dang En accepted the crocodile crickets and raised it in the Pearl River Aquatic Institute of Aquatic Biological Risk Evaluation Center.

Gu Dang's grace to Li Shu's house to see crocodile birds

Earlier, Gu Dangen had successively received four crocodiles from the society and raised in the center for three or four years. Some of these crocodiles were arrested by citizens in the wild, while others were discovered when the lake was left. This reflects the fact that the crocodile crickets are distributed in the wild.

"From the existing quantity, it has not yet reached the point of flooding. But to do popular science as soon as possible so that more people can realize its harm, it can achieve the effective prevention and control of crocodiles earlier." Gu Dang En said Essence

Zhou Zhuocheng, chairman of the Primary and Water Ecological Professional Committee of the China Fisheries Association, also told Qianjiang Evening News · Hours. Even in the place of origin, only crocodiles and larger fish are likely to prey. "After entering the natural water bodies, the crocodile cricket may prey in a large amount of local fish, which has a greater impact on the ecology." Zhou Zhuocheng speculated that the crocodile cricket appeared in the natural water body. , Caused by abandonment.

After the appeared, netizens also conducted a warm discussion about how to deal with it. However, Zhou Zhuocheng said that there is no effect except for ornamental fish. "Because its meat is not delicious, the egg is poisonous. In the place of origin, because of its predatory characteristics, it is more fun to catch it, so it is used to fish more, but we will not develop it here for fishing." Say.

Everyone can participate in preventing and controlling foreign invasion species.

It is critical to do a good job of popular science

He has been engaged in the prevention and control of foreign fish invasion for many years. Gu Dang has recognized the importance of science popularization.

African snails entered my country's invasive species in the first half of the last century, and are now very common in South China. After being introduced, some people have tried artificial breeding, but have been disgusted by the market for poor taste and disease dissemination.

"In fact, everyone grabbed it after seeing it, and then dealt with it, the prevention and control can be improved a lot." Gu Dangen said that because of some reports of the excessive description, "the big snail can't touch it", "60 million are 60 million yuan, Parasites "and so on, causing everyone to dare not touch.

In Gu's opinion, preventing and controlling foreign invasion species is something that everyone can participate in. As long as personal protection is done, "wear a glove, and then clean it in time after catching it. harmful."

The "Qing Daofu", which is very common in South China, also caused "invasion" due to the inadequate science science in the early years. "Qing Daofu" was first introduced as an ornamental fish. Although it is an ornamental fish, the appearance is not beautiful.

Many. For example, after the fishermen caught it in the early years, they saw that they did not know, and it was useless, so they threw it back to the river.

The "Qing Daofu" has a strong reproduction ability, and there was no pressure on fishing at the time. Therefore, the number of "Taooff" was increasing, and the number of other fish was getting less and less. In some severe river sections, fishermen can catch more than a hundred pieces overnight.

Gu Dang's capture of fishermen is collecting fishermen

Over the years, the fishermen have known them because the team often goes to the river to monitor them. "Every time you meet, the fishermen can remember when we came last time." Gu Dangen said. Every time the team reaches a point, the local fishermen will actively run over to show the new fish they encountered during fishing, or seek their help on foreign species.

The improvement of the ecological awareness of fishermen is very helpful for the prevention and control of foreign species. When the team discovered a new type, I often communicated with the old fishermen. "Maybe we found new fish, but I don't know when it first appeared, but the old fishermen knew. Although they may not be able to call the name of a fish, they are very clear about what the fish looks like. "Gu Dangen said.

Team members view fish capture situation

News+

Our province's first census foreign invasion of aquatic animals,

Find Fushou snails the most

"Judging from the current census situation, the crocodile larvae did not find that Fushou snails are the most, and the second." Zheng Tianlun, the head of the industrial development department of the Aquatic Promotion Station of the Zhejiang Agricultural and Rural Hall, told Qianjiang Evening News.

In the census of foreign invasion of the aquatic animals in Zhejiang Province this year, Fushou snails have the highest frequency, and the Fushou snails have great destruction. "It eats everything. Once entering rice fields, it will eat rice seedlings and seedlings. Big. "Zheng Tianlun said that there are currently many measures such as physical control, agricultural prevention, biological prevention, and chemical prevention, but the most important way to clean up is still by manual removal. efficiency.

Zheng Tianlun introduced that this census takes the eight major water system as the main line, focusing on the six invasion Other foreign varieties such as the species and Kerrachi (crayfish) have carried out census.

"To understand their distribution and quantity, we can develop prevention and control measures more targeted and determine the focus of prevention and control research." Zheng Tianlun said that this is the first time in Zhejiang Province to conduct a census of foreign invasion of aquatic animals in Zhejiang Province. Fully find out the overview of the province's foreign invasion of aquatic animals, be able to establish foreign invasion of aquatic animal data files, improve foreign invasion of aquatic animal database, and provide basic data support for scientific prevention and control of aldarian animals.

Source: Qianjiang Evening News · hourly journalist Pan Lu Profile reporter Wang Xiaoyi

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