The Chinese sturgeon is called the panda in the water. What is its living condition? How to protect it?

The Chinese sturgeon is called the panda in the water. What is its living condition? How to protect it? Establish a full-cycle time maintenance management system, and declare the baiji extinct in 2007, which has become an elegy for the green ecology of the Yangtze River. These include overfishing, environmental pollution, habitat destruction and damage to the shipping industry. It was human factors that led to the extinction of the baiji, which made people more and more worried about the mistakes of the Chinese sturgeon.

In addition to human factors, the rare total number, low fertility and slow growth and development of baiji are also the essential factors that cause its possible extinction.

Fortunately, Chinese sturgeon is different from dolphin, which is a mammal. Like most fish, the breeding strategy is to win by the total number. Baiji dolphin has 1 baby per fetus, and occasionally twins; The spawning amount of ACIPENSER sinensis in 1 can reach 300,000 ~10.3 million, with an average of 600,000. This means that many Chinese sturgeons can be artificially propagated in the natural environment of the laboratory without encountering nemesis.

To carry out long-term scientific research and detection on the released Chinese sturgeon, scientific and technical personnel should not only distinguish whether the Chinese sturgeon in rivers and oceans is a natural species or an artificial species, but also track and detect the artificially bred Chinese sturgeon, evaluate the actual effect of the release, and scientifically study the regularity of the theme activities of Chinese sturgeon. Therefore, researchers will mark the released Chinese sturgeon for tracking detection. At present, there are four key technologies to track the release markers of Chinese sturgeon: PIT marker, underwater sonar marker, T marker and its DNA marker.

PIT tag is a long-term effective real identity tag and an integrated ic embedded in fish, which has the key function of false catch assessment. For the Chinese sturgeon caught by mistake, researchers can display the biological characteristics, release information and other data information carried in the human integrated ic on the display screen according to the camera scanner like a reader. Underwater sonar markers are embedded in the abdominal cavity of Chinese sturgeon. When the marked fish swims through the receiving range of the signal receiver (about 1000m), the time of receiving the data signal can be automatically saved, and then the whole migration process can be inferred.

The T mark is printed with the contact information and real identity serial number of Chinese sturgeon research institute, which helps fishermen to easily and immediately identify this fish as a released fish according to this mark. This dna marker uses a small number of fin samples of Chinese sturgeon, and establishes the DNA identification database of the parent fish and offspring of Chinese sturgeon according to DNA molecular analysis technology. With this technology, when you see the released Chinese sturgeon, scientists and technicians can not only recognize them, but also master their household registration and genealogy data.

According to the data, since the artificial propagation and release of Chinese sturgeon was first carried out in 1984, the Chinese sturgeon research institute has released more than 5.02 million Chinese sturgeons of various specifications and models to the Yangtze River. In recent years, the Chinese sturgeon research institute of the Three Gorges Group has established a migratory detection system for Chinese sturgeon released from Yichang to the Yangtze River estuary, covering the middle and upper reaches of the Yangtze River near 1800 km, combining underwater sonar marker detection, Internet technology and wireless data transmission.

This is also the most comprehensive real-time monitoring and evaluation system for the actual effect of fish release in China. According to the new scientific research data, in recent years, 53.7% of Chinese sturgeon has been released into xianhe town waters, which has played a key role in filling the ecological resources of Chinese sturgeon.

In addition to the conservation of Chinese sturgeon, the Three Gorges Group has also vigorously carried out ecological environmental protection work in the upper and lower reaches of the Yangtze River and Jinsha River. Up to now, ACIPENSER sinensis Research Institute has mastered the breeding and artificial breeding techniques of five rare and endemic fish, such as octopus, abalone and schizothorax, and raised nearly 1,000 kinds of fish.

Among them, there are 25 species of rare and endemic fish in the Yangtze River, and the total number of rare and endemic fish released in Jinsha River exceeds 6,543,800+0.7 million. They also continue to carry out coordinated green ecological production scheduling in river sections. After the successful implementation, the scale of the four major fish farming operations in the middle and upper reaches of the Yangtze River has been continuously improved, and the environmental benefits are obvious.