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At the beginning of the new year, the Ministry of Agriculture and Rural Affairs announced that the Yangtze River fishing ban has achieved important phased results. In 2024, we will continue to take effective measures to unswervingly promote the 10-year fishing ban on the Yangtze River. Since the ban on fishing, have fish stocks in key waters increased or decreased, and how has aquatic biodiversity changed?
In the past few days, the investigation and evaluation of special aquatic biological resources of the Yangtze River is being carried out in typical waters such as Taihu Lake in Jiangsu Province and Liangzi Lake in Hubei Province. The reporter followed the investigation team of Liangzi Lake in Hubei Province and arrived at the designated point by boat.
The reporter saw at the scene that the staff used professional sampling tools to sample the lake water, plankton, benthic organisms, aquatic plants, and fish resources of Liangzi Lake.
Fan Yingchun, staff member of the Freshwater Fisheries Research Center of the Chinese Academy of Fishery Sciences: We have set up 18 points in the entire Liangzi Lake to make a relatively intuitive evaluation of the aquatic environment status and trophic status index of Liangzi Lake.
The reporter learned that this special resource investigation and assessment will focus on the composition of fish species, community structure, resources and water environment to conduct a systematic investigation.
The collected samples will be sent to the laboratory for analysis, and through comprehensive and in-depth research and evaluation, the status and restoration trend of fish resources and aquatic biodiversity in key waters of the Yangtze River Basin will be scientifically judged, so as to provide scientific support for the subsequent targeted refinement and improvement of policies and measures.
At present, the mainland has established a comprehensive and systematic investigation and monitoring system for aquatic biological resources in the Yangtze River basin. In addition to the investigation and evaluation of special resources in specific waters, more than 700 monitoring stations have been set up along the river to carry out regular investigation and monitoring. On this basis, the evaluation of the effect of the fishing ban and the evaluation of the integrity index of aquatic organisms in the Yangtze River were carried out.
In order to accelerate the ecological restoration of the waters of the Yangtze River Basin, while banning fishing, the Ministry of Agriculture and Rural Affairs has also organized and implemented the protection of rare and endangered species represented by flagship species such as the Chinese sturgeon, the Yangtze sturgeon and the Yangtze finless porpoise, and systematically carried out wild rewilding and wild natural reproduction experiments to supplement wild population resources.
As the ten-year fishing ban on the Yangtze River continues to advance, in 2023, there will be many scenes of groups of finless porpoises playing in the water in the Wuhan section of the Yangtze River, Yichang section and other sections of the Yangtze River. The number of fish species monitored in the southern section of the Fuhe River increased to 29.
The latest monitoring shows that the recovery of aquatic biological resources in the Yangtze River is improving.
Yi Yanrong, Deputy Director of the Fishery Administration Supervision and Management Office of the Yangtze River Basin of the Ministry of Agriculture and Rural Affairs: According to our latest survey and monitoring results, 193 species of fish have been monitored, an increase of 25 species from the beginning of the ban in 2020, and the number of finless porpoises in the Yangtze River has reached 1,249, achieving the first rebound since the monitoring data was available in 2006, and the biological integrity index of the main stream of the Yangtze River, Poyang Lake and Dongting Lake has increased by two levels compared with the beginning of the index system in 2018.
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Editor: Dong Lindan