Chinese Sturgeon Protection Research
As the world ’s largest hydropower development and operation enterprise and China ’s largest clean energy group, the Three Gorges Group has long attached great importance to ecological and environmental protection work, constantly exploring the path of environmental protection and development, and forming an “environment with full river basin, full life cycle, open sharing, and technological innovation”. Philosophy, established a sound environmental management system guarantee.
After scientific domestication and series control, the three-tailed female offspring of Chinese sturgeon once again matured and obtained 150,000 fertilized eggs. The artificial reproduction technology system of Chinese sturgeon has matured.
All sub-generational Chinese sturgeon reserve echelons were tested for DNA. Using optimized full-sequence analysis technology, a series of clear microsatellite genetic markers were screened out, and genetic lineages were established to achieve more comprehensive artificial reproduction during the next stage. Provides necessary technical support for accurate genetic management.
The Chinese sturgeon BAC gene library with large fragments of Chinese sturgeon DNA was successfully constructed using the seed obtained from the development of Chinese sturgeon nucleus, and the long-term preservation of Chinese sturgeon DNA genetic material at -80 ° C has been achieved. The results provided basic guarantees for the preservation of Chinese sturgeon's genetic material, the Chinese sturgeon's genetic protection technology research and the whole genome deep sequencing research.
During the domestication and breeding work of Albacore, a total of 95,000 fertilized eggs were obtained and 53,000 were hatched; round-mouthed copper fishes received 31,000 eggs and hatched 17,700. For the first time, artificial breeding and release of round-mouth copper fish and albacore bream were implemented.
In 2017, new progress was made in species protection, genomic research, and the construction of germplasm resources in Chinese sturgeon. The second-generation artificial breeding of Chinese sturgeon was successful again, which effectively supplemented the second-generation artificial population echelon. Completed the preliminary assembly of the Chinese sturgeon genome structure; successfully established the Chinese sturgeon genome BAC library; further deepened the genetic management of the Chinese sturgeon artificial population, tested the genetic characteristics of more than 200 offspring individuals in 2006-2008, and supplemented the genetic profile of broodstock; Sexual development of sperm, cell and other germplasm resources preservation technology research.
雌核发育是指卵子须经过精子激发才能产生只具有母系遗传物质的个体有性生殖方式。 ①The development of female nucleus refers to the method of sexual reproduction of an individual that only has maternal genetic material after the eggs have been stimulated by sperm.
Three Gorges Reservoir Ecological Regulation Experiment
In 2017, the Three Gorges Reservoir implemented two ecological dispatches for the natural breeding of the four major domestic fishes. During the dispatching period, the scale of the four major domestic fishes in the Yidu River reached 1.08 billion. From 2011 to 2017, the average annual natural breeding and spawning scale of the four major fish increased by 15 times compared with 2010. The natural breeding scale of other small fish in the middle and lower reaches of the Yangtze River also increased significantly, and the dispatching effect was significant, which effectively promoted the restoration of fish population resources in the middle and lower reaches of the Yangtze River. To promote the healthy development of the Yangtze River aquatic ecosystem. From 2016 to 2017, the Chinese sturgeon research institute applied environmental DNA technology to the monitoring of the breeding of four major domestic fish, making the spawning grounds more accurate and improving the understanding of the natural reproduction law.
China Three Gorges Group has adopted the ecology and environment including the monitoring system for the ecology and environmental protection of the Three Gorges Project, the ecological environment monitoring system in the lower reaches of the Jinsha River, the national natural reserve for rare and unique fish in the upper reaches of the Yangtze River, and the aquatic ecosystem monitoring system in related waters. The monitoring system covers the watersheds and affected areas where all large-scale water conservancy projects in China Three Gorges Group are located. It mainly affects the environmental conditions of the construction areas and watersheds, and the areas affected by the operation of hydropower stations on the ecological environment of the watershed, mainly on the environment of the construction areas and watersheds. Long-term monitoring and evaluation of the status, the impact of hydropower station operation on the ecological environment of the river basin, the effects of environmental protection measures, and information management of real-time updated data.
Monitoring system for ecology and environmental protection of the Three Gorges Project. Focusing on the construction and future operation of the Three Gorges Project, a complete and representative Yangtze River Three Gorges Project ecology and environment monitoring network will be used to track and monitor the entire process of the ecological and environmental problems caused by the Three Gorges Project, and provide timely early warning and forecast.
Ecological environment monitoring system in the lower reaches of the Jinsha River. In accordance with the changes in the ecological environment of the river basin and the actual situation of development and construction, the ecological environment monitoring in the lower reaches of the Jinsha River will be implemented in an orderly manner, including water quality monitoring, aquatic ecological monitoring, terrestrial ecological monitoring, water temperature monitoring in the Panzhihua-Yichang section of the Yangtze River, and supersaturated gas monitoring in the river basin. Wait.
National Ecological Reserve for Rare and Endangered Fishes in the Upper Reaches of the Yangtze River and Related Aquatic Ecosystem Monitoring System. Monitoring of fish resources and their typical habitats in Panzhihua-Qiaojia, Yongshan-Shuifu and other river sections; early fish resource monitoring in Jiangjin, Yibin and other river sections; and environmental water quality of protected areas during fish breeding , Plankton, fish heavy metal residues and pollution accidents.