Recently, during the investigation of fish biodiversity in the section from Lijin to Xihekou by the Yellow River Water Conservancy Commission, an adult Yellow River catfish was found alive at the gate of the current flow of the Yellow River estuary. According to research by the First Institute of Oceanography of the Ministry of Natural Resources and the Yellow Sea Fisheries Research Institute of the Chinese Academy of Fishery Sciences, since the 1990s, due to the impact of the Yellow River runoff and artificial fishing, the Yellow River catfish is on the verge of extinction, and there is no record of catch by the beginning of the 21st century. This is the first time in the 21st century that live Yellow River catfish have been found in the Yellow River Estuary, marking the further improvement of the ecological environment in the yellow river estuary. ——Source: World Wide Web
Many people are not familiar with the Yellow River catfish, but they just think that it is a fish, it is not an ordinary fish. Yellow River catfish, also known as knifefish, Yellow River knifefish, etc., survive in the Yellow River estuary area, because of its shape like a sharp knife and named. Thin and bright, with fine scales and small belly, short and rounded snout, like a sharp knife, it is a valuable fish that can be compared with the Yangtze River knifefish.
When it comes to Yangtze River knife fish, we are all familiar with it, because the price of this fish is very high and even reaches tens of thousands of yuan a catty. The Yellow River knifefish is even more valuable because it has no record of fishing between the 1990s and 2030s. So what is so special about the Yellow River knifefish?
1, the hometown is at the mouth of the Yellow River, the hometown of the Yellow River knifefish is in the Yellow River estuary, in the Yellow River estuary, the locals call it "inverted fish".
2, the size is not large, the Yellow River fishing body is not large, generally 20-40 cm, the largest is not more than half a pound, for small fish.
3, migratory, every year in the middle of the third month of the lunar calendar, the Yellow River knifefish swim from the Yellow River is the mouth of the Yellow River into the Yellow River, swim up the current, through the territory of Dongying City to Dongping Lake to spawn, hatch. After the eggs hatch into juveniles, they follow the Yellow River to the estuary, where they grow and overwinter in the Bohai Sea.
These three special features make it difficult for the Yellow River knifefish to grow, but it is not the reason why it has disappeared for 30 years. Yellow River knifefish is a rare fish that grows in the lower reaches of the Yellow River, and as we all know, the Yellow River often stops flowing, especially in the eight years from 1991 to 1998, the average annual interruption time reaches 107 days. In 1997, a major drought cut off the Yellow River for 226 days. The cut-off of the flow has caused a vicious circle to the ecological environment, and the number of organisms that thrive along the Yellow River has decreased significantly, and the cut-off flow of the river has made it difficult to find the unique fish traces of the Yellow River.
With the diversion of water and sand in recent years, the continuous improvement of the Yellow River water environment, the long-disappeared Yellow River knifefish appeared, which is the best proof of environmental improvement, I believe that this fish will only increase as it slowly multiplies.
In addition: although knifefish have reappeared after 30 years, they should not disturb their lives, do not fish, do not fish, do not buy, do not sell, let them slowly multiply, give them a chance to slowly restore their populations, and do not think of protection until they disappear.