The key fish species with the highest altitude distribution realizes large-scale artificial reproduction for the first time

The world’s highest altitude distribution of key fish species realizes large-scale artificial reproduction for the first time

The world’s highest altitude distribution of key fish species achieves large-scale artificial reproduction for the first time, the world’s highest altitude distribution of key fish species achieves large-scale artificial reproduction for the first time

Xinhua News Agency, Xining, August 12 (Reporters Li Jinfeng and Wu Gang) The key fish species, which live at the source of the Yangtze River at an altitude of about 4,800 meters, has undergone artificial insemination and hatching.
After artificial insemination and hatching, 20,000 young fry grow well
.

This marks the first time that Chinese researchers have achieved large-scale artificial reproduction of key fish species with the highest altitude distribution in the world

Head Schizopygopsis fish-scale artificial breeding experiments, by the Yangtze River Water Resources Committee will be under the Yangtze River Academy of Sciences organized, Qinghai Province Fisheries Technology Promotion Center with the implementation
.

The small-headed schizophrenia is a large and medium-sized fish unique to China, and is also a key protected fish in Qinghai Province.

Commissioner Academy of Sciences

The reporter saw in the fish fry cultivation pond of the Qinghai Fishery Technology Promotion Center that the young fry that had been artificially propagated on a large scale had been bred for more than a month, and the fish had grown to be 2-3 cm long
.

After water temperature adjustment and bait configuration, the juvenile fish are currently swimming lively and growing well

According to Li Wei, the leader of the experiment and a senior engineer from the Yangtze River Scientific Research Institute , there are currently six known fish species in the source of the Yangtze River
.

Among them, the small-headed schizophrenia is large, and the adult fish feeds on other fish such as plateau mackerel in winter.

Academy of Sciences

The scientific research found that the small-headed sclerodon, which has long lived on the Qinghai-Tibet Plateau, has adapted to the high-altitude, high-cold and low-temperature living environment through continuous evolution
.

For example, the number of tentacles is reduced, the number of throat teeth is reduced, and the scales of fish are reduced, so as to reduce carnivorous predation

"When the rivers in the source of the Yangtze River were frozen in winter, how to survive the winter and how to reproduce was an unsolved mystery in the past for a long time
.

" In the examination, they explored the wintering grounds and spawning grounds of the small-headed schizophrenia, and studied and mastered the characteristics of the hatching water temperature of the small-head schizophrenia fertilized eggs

In June of this year, the research team used the mature broodstock collected in the southern source of the Yangtze River to obtain fertilized eggs through artificial insemination, and implemented artificial incubation at the Yangtze River Academy of Yangtze River Scientific Research Base of the Ministry of Water Resources at an altitude of more than 4,000 meters , successfully realizing large-scale artificial reproduction
.

Subsequently, 20,000 new-born fry were transported thousands of miles by car and transported from Zaduo County, Yushu Tibetan Autonomous Prefecture, Qinghai Province to Xining City, where they were cultivated and observed in the cold-water fish breeding workshop of Qinghai Fishery Technology Promotion Center

Academy of Sciences

Wang Zhenji, a senior engineer of Qinghai Fishery Technology Extension Center, said that the first realization of large-scale artificial reproduction of the small-headed schizophrenia, will carry out research and protection for other unique fish in the source of the Yangtze River, and accumulate valuable experience in subsequent artificial reproduction and release
.

Xu Ping, deputy chief engineer of theYangtze River Academy of Sciences , introduced that the small-headed schizophrenia has achieved large-scale artificial reproduction, helping researchers to systematically master the water temperature and salinity conditions required for the spawning, hatching, growth and development of key fish species in the source of the Yangtze River, for the subsequent development of the Yangtze River Artificial conservation of key fish at the source lays the foundation
.

The scientific research team will gradually extend the results of this artificial propagation experiment to the conservation and breeding of other endemic fish in the source of the Yangtze River, and consolidate the basic research on the protection of aquatic biodiversity in the source of the Yangtze River

Academy of Sciences