Sichuan view auctioneers: Cai Lei, Hu Min, Liao Tingdi, Li Fuqiang, Wang Sichu
Jiang'an County Rong Media Center
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C Vision Cai Lei
On April 9, CCTV reporters learned from the Yangtze River Basin Fishery Supervision and Management Office of the Ministry of Agriculture and Rural Affairs that the 2024 Yangtze River sturgeon wild natural water spawning ground transformation and natural reproduction experiment was successful, which is an important step towards the reconstruction of the Yangtze sturgeon wild population. Starting from March 2024, the visual photographer recorded the entire test process, and witnessed the 2024 Yangtze River sturgeon spawning ground transformation and natural reproduction experiment in the wild natural waters of the Yangtze River in the Jiang'an section of the Yangtze River in Sichuan.
Fish eggs laid by a Yangtze sturgeon in a spawning ground in wild natural waters on April 7 (underwater macro camera shot)
The Jiang'an section of the Yangtze River is an important habitat for the Yangtze sturgeon, a rare and endemic fish in the upper reaches of the Yangtze River and a national first-class protected animal. The Yangtze River Zhudao divides the Yangtze River water into two, and the spawning ground transformation and natural reproduction experiments of the Yangtze sturgeon in the natural waters of the Yangtze River are carried out in the natural waters of the Neijiang River, where the water flow is relatively slow.
On March 14, in the natural waters of the Neijiang River on Zhudao in the Jiang'an section of the Yangtze River, the staff laid a barrage net for the spawning ground
In March 2024, the Yangtze River Fisheries Research Institute of the Chinese Academy of Fishery Sciences and other scientific research institutions conducted spawning ground transformation and natural reproduction experiments in the Jiang'an section of the Yangtze River. Based on the topographic characteristics of the existing river channel and the three-dimensional water ecological model, the researchers carried out the transformation of the spawning grounds in the natural waters of the Yangtze sturgeon for the first time through the construction of topography, sediment and flow velocity field, so that the Yangtze sturgeon could find its own spawning grounds and mate and reproduce freely.
On March 19, researchers used a Doppler velocimeter to measure the flow rate of water and the topography of the spawning grounds
On March 22, researchers measured the body length and weight of the parent Yangtze sturgeon
On March 22, researchers, together with the fishery administration and Changhang public security departments, put the parent Yangtze sturgeon into the spawning grounds of the modified natural waters
On March 25, in order to ensure that the spawning of the Yangtze sturgeon could be observed at the first time, researchers stayed at the test site 24 hours a day
On March 27, two Yangtze sturgeons searched for suitable spawning grounds in the Yangtze River
On March 27, researchers dived into the Yangtze River to check the sturgeon's physical condition
At 8:17 a.m. on April 7, researchers found that the Yangtze sturgeon was chasing and ovulating in the modified spawning ground, and then dived to retrieve the eggs laid by the Yangtze sturgeon, confirming the occurrence of natural reproductive activities.
On the morning of April 7, researchers observed underwater monitoring and found that the Yangtze sturgeon was chasing and ovulating in the modified spawning grounds
On the morning of April 7, researchers dived into the Yangtze River to obtain the eggs laid by the Yangtze sturgeon, confirming the occurrence of the natural breeding activities of the Yangtze sturgeon
Du Hao, a researcher at the Yangtze River Fisheries Research Institute of the Chinese Academy of Fishery Sciences, said that the success of the experiment has filled the gap in the restoration and transformation of the Yangtze sturgeon's habitat. The next step will be to explore and implement river channel transformation in some areas of the Yangtze River, so as to continuously explore and tackle key problems for the natural reproduction of the Yangtze sturgeon in the wild in the true sense.