The Yangtze River is dry, how are the underwater creatures okay? A 0.94-meter wild Chinese sturgeon carcass floats on the water
Release time：2023-03-23 07:59:44 source：korpimaankyynel.com author：Shao Mo environment
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The Yangtze River is dry, how are the underwater creatures okay? A 0.94-meter wild Chinese sturgeon carcass floats on the water
This year, the Yangtze River Basin suffered the worst drought in the past 70 years. This is an indisputable fact. Hundreds of rivers leading to the Yangtze River have stopped flowing. Dongting Lake and Poyang Lake have become "big trees". The water level in the river section has dropped below the minimum warning line, and some river sections have bottomed out. In August, the strange phenomenon of "quick return to dryness" did occur in the Yangtze River Basin, and some relics that had been submerged by lakes and rivers for a long time finally revealed their "real bodies". Poyang Lake appeared in the ancient stone bridge built in the Ming Dynasty, and the Banan section of Chongqing Appearing in a 600-year-old cliff statue, Jiang Han appeared in "Jiangxin Xiaolu". The drought in the Yangtze River has had a huge impact on agricultural production in the middle and lower reaches of the Yangtze River, and many kinds of grains have not been harvested. On a farm near Poyang Lake, the farmer said that this was the worst drought he had ever seen, and some rice grains could not be used at all. , the grains were empty, and there were no grains of rice. The Yangtze River is dry and the water area of the Yangtze River has decreased, which makes people worry about whether the ecosystem of the Yangtze River Basin has been damaged. In recent years, in order to protect the ecosystem of the Yangtze River Basin, the Yangtze River has implemented the most stringent "Yangtze River Ten Annual Fishing Ban Plan. In recent years, the ecosystem of the Yangtze River has just shown signs of recovery. The tributaries of the Yangtze River have "clustered fish", and a large number of wild fish have appeared in the mainstream of the Yangtze River. ”, chasing and playing in the water, attracting a large number of people to come and watch. The Yangtze River is dry, how are the underwater creatures okay? According to the actual situation, the situation of underwater creatures in the Yangtze River should not be optimistic. The reduction of water bodies means that the living space of underwater creatures will become smaller, and their food sources will also decrease, and a large number of fish may die. Poyang Lake is the largest freshwater lake in my country. In August this year, the water level dropped again and again, and a large number of fish were trapped in the shoals or swamps. This time, the birds were completed. Tens of thousands of birds gathered in Poyang Lake and enjoyed the "gluttonous food" in advance. Feast", you must know that in previous years, you can only enjoy it until the dry season after October. Recently, a heart-wrenching picture has appeared in Poyang Lake: people found the dead body of a Yangtze finless porpoise lying in a quagmire by the water of Poyang Lake, with a large piece of skin peeling off its chin, and a pool of blood flowing around its chin. The Yangtze finless porpoise is a first-class protected animal in my country and is known as the "giant panda" underwater. It is not known whether the finless porpoise was attacked this time or whether it was "heated to death" by the lake water. At present, the fishery administration department is investigating the cause of its death. . On September 7, a heart-wrenching picture appeared again on the Yangtze River. Someone found a fish body suspected of being a Chinese sturgeon floating on the river in the waters near the Laoyu Port in Chongming, Shanghai. The Chinese sturgeon is known as an underwater "living fossil". It is a first-class protected animal in the Yangtze River, so many staff of the Aquatic Wildlife Conservation Research Center came to hear the news. According to the photos, the skin of this wild Chinese sturgeon is intact. The staff confirmed that it is indeed a wild Chinese sturgeon. It has been dead for a long time and exudes a rotten smell. After measurement, this wild Chinese sturgeon is 0.94 in length. rice, weighing about 3 kg. In view of the fact that Chinese sturgeon can grow to 300 kg and 3 meters in length, male fish do not reach adulthood until they are 9 to 18 years old, and female fish do not reach adulthood until they are 14 to 26 years old. This Chinese sturgeon should be only 2 to 3 years old. A young "baby fish" unfortunately died when he was still a minor. The cause of death is unknown. There may be the following reasons. First, the death caused by human factors. Before the Yangtze River fishing ban plan, human beings had a great impact on the life of the Yangtze River. Excessive sand mining operations, overfishing operations, rotation and Wastewater discharge, and fish in the Yangtze River are rapidly decreasing. Second, if you get sick and die, it is possible for animals to get sick. People will get sick, land animals will get sick, and fish will also get sick. If it’s not a big problem for individuals to get sick, they’re afraid of some kind of contagious plague. Third, it may be related to the drought in the Yangtze River, the drought in the Yangtze River, the reduction of the water area of the Yangtze River, and the long-term high temperature weather. Recently, the temperature of the river water has continued to rise, and the Chinese sturgeon may have been "hot" to death. Recently, the number of fish in the Yangtze River has In the rapid decline, this Chinese sturgeon may also starve to death. The staff brought this wild Chinese sturgeon body back to the laboratory for research, to investigate the cause of death, and hope that such tragedies will not happen again, but now there is a piece of exciting news that a live wild Yangtze sturgeon has been found. There are joys and sorrows. On September 6, someone accidentally found an injured wild Yangtze sturgeon on the Internet celebrity beach of Luohuozhou, Tuanfeng County, Hubei Province. The Fisheries Law Enforcement Brigade rescued it and put it back into the Yangtze River after the injury recovered. . The wild Yangtze sturgeon is a national first-class protected animal. In July this year, the International Union for Conservation of Nature (IUCN) announced that the white sturgeon (Psephurus gladius) has become extinct, the Yangtze sturgeon (Acipenser dabryanus) has become extinct in the wild, and now the wild Yangtze sturgeon has been rediscovered. Not extinct. We want to take this opportunity to protect the wild Yangtze sturgeon and save it from extinction. Although this is good news, the drought in the Yangtze River has indeed had a great impact on the fish in the Yangtze River. Drought is a natural disaster, and we have no choice. What we can do is to continue the ban on fishing in the Yangtze River. Interesting and informative scientific content, please pay attention to the only WeChat public account: interesting exploration
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