Experts from the Chinese Academy of Sciences: We collected more than 100 larvae of sturgeon but failed to breed them

category:Society
 Experts from the Chinese Academy of Sciences: We collected more than 100 larvae of sturgeon but failed to breed them


In recent days, the news of the extinction of the white sturgeon has aroused widespread concern.

In the 1970s and 1980s, sturgeons were more common in the Yangtze River Basin. At that time, it was often seen that some people dragged sturgeons longer than scooters, which was more common. When fishing in the Yangtze River, you can catch a ton of white sturgeon at a time. In the past 40 years, Acipenser sturgeon, the rare animal of Yangtze River, the king of freshwater fish in China, has gone from common to extinction, which is heartbreaking.

At present, the research on sturgeon is very limited

The Museum of aquatic biology, Institute of Hydrobiology, Chinese Academy of Sciences, which has 400000 specimens, is the largest museum of freshwater fish in Asia and the largest museum of white sturgeon in China.

On January 4, reporters visited the museum. Yesterday, there was a lot of news about the extinction of the sturgeon. Many media and citizens asked me for advice. Zhang Xianfeng, curator of the Museum of Hydrobiology, is an expert who has studied rare animals in the Yangtze River for nearly 40 years.

According to Zhang Xianfeng, there are three kinds of sturgeons in the Yangtze River - the white sturgeon, the Chinese sturgeon and the Yangtze sturgeon. One of the biggest characteristics of the sturgeon is that it has a long kiss in the front part of its body, which accounts for one third of its total length.

Zhang Xianfeng said he was shocked but not surprised by the news of the extinction of the sturgeon. He explained: its a shock that at last theres this kind of saying to the public. Its no surprise that the research on the white sturgeon is very limited at present. Before the declaration of extinction, our scientific researchers had not collected the specimen of the white sturgeon and recorded the field observation for more than ten years, and had not accumulated at least some research data and experience like other rare animals. Its really a pity. .

There are still some fish in the Yangtze River that havent seen for many years

There is a saying among fishermen that one thousand catties of wax and one thousand catties of elephant refers to the white sturgeon. Zhang Xianfeng said, the largest specimen of the Chinese sturgeon in the collection is about 4 meters, not the largest specimen of the Chinese sturgeon. When I was studying fish in 1980, I saw the introduction of the 7-meter-long white sturgeon in the book.

Todays extinction of the Yangtze River is the white sturgeon, tomorrows extinction is other species, so what is the possibility of extinction the day after tomorrow?

Wang Xi, the Museum of aquatic biology of the Chinese Academy of Sciences, replied that some of the Chinese sturgeon, the Yangtze sturgeon, the shad, the shad and the Coilia Coilia have not been seen for many years. In addition to fish, aquatic animals such as Chinese alligator and Shanrui turtle are also in danger, some of them are estimated to be the next sturgeon! and Yunnan Yilong carp and Baiji are extinct or functionally extinct species.

At the same time, scientists also said that the protection of endangered animals in the Yangtze River is not only to protect the species, but also to protect the environment on which endangered animals depend for survival and reproduction, that is, to protect the mother river of the Yangtze River.

Smile period of keeping Yangtze River finless porpoise

The Ministry of agriculture and rural areas has issued a circular to implement a ten-year plan to ban fishing in the natural waters of the main stream and important tributaries of the Yangtze River, except for the aquatic biological nature reserve and the aquatic planting resources reserve, from 2020.

On December 27, 2019, the 15th meeting of the Standing Committee of the 13th National Peoples Congress deliberated the Yangtze River Protection Law (Draft) in groups for the first time. This indicates that the law is not far from being officially promulgated.

Although we have seen the extinction of some species, such as Baiji and baisturgeon, we also need to see hope. In more than 20 years of artificial breeding and Research on the baiji Qiqi, the Institute of Hydrobiology of the Chinese Academy of Sciences has absorbed a lot of valuable knowledge and experience, and applied some experience to the protection of the Yangtze River finless porpoise.

(function() {(window. Slotbydup = window. Slotbydup| []). Push ({ID: u5811557, container: ssp_, async: true});)) (); data shows that in 2017, the number of wild Yangtze finless porpoises was about 1012, and the trend of rapid decline of Yangtze finless porpoise population was curbed, but its endangered situation did not change fundamentally. The number of Yangtze finless porpoises living in several ex situ reserves and conservation bases is increasing. Among them, there are more than 80 Yangtze River finless porpoises in the Yangtze River Tianezhou Baiji National Nature Reserve in Shishou, Hubei Province. The Yangtze River finless porpoise protection in Tianezhou is considered to be the first successful example of whale ex situ protection in the world. Zhang Xianfeng said that legislation for the protection of the Yangtze River is the result of years of efforts by the legal community and the natural protection community. In the early stage of research, during the discussion of legal documents, experts from our institute participated in different degrees and paid close attention to the Yangtze River Protection Law. I think it is very beneficial for the protection of the Yangtze River to rise to the height of the law. Source: editor in charge of Changjiang Daily: Liu Yuxin, nbjs7825

Data shows that in 2017, the number of finless porpoises in the wild was about 1012, and the rapid decline of finless porpoise population was curbed, but its endangered situation has not fundamentally changed.

The number of Yangtze finless porpoises living in several ex situ reserves and conservation bases is increasing. Among them, there are more than 80 Yangtze River finless porpoises in the Yangtze River Tianezhou Baiji National Nature Reserve in Shishou, Hubei Province. The Yangtze River finless porpoise protection in Tianezhou is considered to be the first successful example of whale ex situ protection in the world.

Zhang Xianfeng said that legislation for the protection of the Yangtze River is the result of years of efforts by the legal community and the natural protection community. In the early stage of research, during the discussion of legal documents, experts from our institute participated in different degrees and paid close attention to the Yangtze River Protection Law. I think it is very beneficial for the protection of the Yangtze River to rise to the height of the law.