China News Service, Yichang, April 10th (Guo Xiaoying and Dong Xiaobin) Ten thousand Chinese sturgeons embarked on a "home" journey from the Yangtze River rare fish release point in Yichang City, Hubei Province on the 10th. After ten days, these Chinese sturgeons wore "identity cards". The Chinese sturgeon will migrate into the sea.
The "2021 Chinese Sturgeon Proliferation and Release Activities in the Three Gorges of the Yangtze River" held on the same day was organized by the Yangtze River Basin Fishery Administration Office of the Ministry of Agriculture and Rural Affairs, Yichang Municipal Government, and China Three Gorges Corporation, continuing the scientific release strategy combining the "medium, youth and juvenile" , A total of 10,000 Chinese sturgeons of the "second generation" were released, and the overall release specifications have reached a new high on the basis of 2020.
In order to help Chinese sturgeon "go home" safely, researchers have worn sonar marks, PIT marks and T-shaped marks for Chinese sturgeons.
On the same day, there were 8 Chinese sturgeons from 2009 and 2011 breeding "Second Generation" Chinese sturgeon, their body length was more than 1.5 meters, the weight was more than 50 kg, the fish age were more than 10 years old, and they were all close to sexual maturity. Male individual.
Not only did they wear a regular "ID card", they also marked the satellite in batches for the first time.
This marker can continuously and systematically record the marine living environment and offshore activity position of Chinese sturgeon, providing reliable data for further research to reveal the marine habitat of Chinese sturgeon and its adaptability, and creating a new path for scientific investigation and research of Chinese sturgeon's full life cycle in the field.
Jiang Wei, chief engineer of the Chinese Sturgeon Research Institute of the Three Gorges Group, said that through the satellite markers, sonar markers and other composite markers carried by the nearly mature individuals, the river migration and ocean movement path monitoring of the released Chinese sturgeon can be improved for future Chinese sturgeon release strategies. , Improve the release effect and promote the restoration of natural population resources to provide support.
The Chinese sturgeon is one of the oldest vertebrates on the earth. It has a history of 140 million years. It is a flagship species for the protection of rare and unique fishes in the Yangtze River. It has important scientific research and ecological values.
In 1988, Chinese sturgeon was listed as a national first-class protected animal by China, and in 2010 it was listed as a critically endangered species by the World Conservation Union (IUCN).
Since 1984, the Three Gorges Group has implemented 64 consecutive releases of Chinese sturgeon, and more than 5.04 million Chinese sturgeons have been released to the Yangtze River, of which more than 40,000 Chinese sturgeons have been released.
According to the latest tracking and monitoring data in 2020, about 70% of the released Chinese sturgeon migrated into the sea smoothly, which played an important role in supplementing Chinese sturgeon population resources and realizing the sustainable reproduction of Chinese sturgeon.
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