Yangtze River White Sturgeon still possible
Yangtze River White Sturgeon still possible, animals in our lives in fact, we have learned a lot, we have a lot of Chinese animal species, but there are a lot of animals because of a variety of factors slowly towards extinction, the following Yangtze River White Sturgeon still possible.
The Yangtze River white sturgeon is still possible to appear 1
Officially declared extinct! The Yangtze River white sturgeon was last seen in the Yangtze River
The Yangtze River white sturgeon, known as the "king of China's freshwater fish", was officially declared extinct by the World Conservation Union (IUCN).
The IUCN updated its Red List of Threatened Species on July 21, 2022 Beijing time. The list shows that the white sturgeon (Psephurus gladius), a species endemic to the Yangtze River, is extinct, and the Yangtze sturgeon (Acipenser dabryanus) is extinct in the wild. Globally, the Danube River population of the naked belly sturgeon (Acipenser nudiventris Aral Sea subpopulation) is extinct. The Red List also upgrades the protection status of seven other sturgeon species.
The IUCN Global Sturgeon Reassessment shows that 26 species of sturgeon are threatened with extinction worldwide. About two-thirds of these sturgeon populations are critically endangered. River and freshwater biodiversity is vital to people and nature, but globally freshwater biodiversity continues to be lost and river ecology degraded.
Arne Ludwig, Chair of the IUCN Sturgeon Specialist Group, said, "The results are shocking and sad but expected. The assessment shows that sturgeon are still unable to remove the title of 'most threatened taxon in the world'."
White sturgeon were last seen in the Yangtze River in 2003
The three Asian sturgeon mentioned include natural populations of the white sturgeon, Yangtze sturgeon, and Siberian sturgeon, the first two of which are representative of the Yangtze River Basin aquatic species. The white sturgeon was last seen in the Yibin Nanxi River section of the Yangtze in 2003, while the Yangtze sturgeon (Acipenser davidianus) was assessed as extinct in the wild due to the failure to find juveniles other than those in the augmented population.
The Yangtze River basin is home to more than 4,300 species of aquatic organisms, including more than 400 species of fish and more than 170 species of fish endemic to the Yangtze River; it is home to 12 species of aquatic organisms under national protection, such as the baiji, white sturgeon, Chinese sturgeon, Yangtze sturgeon, and Yangtze river dolphin. Among them, the baiji is the rarest of all cetaceans in the world.In 2007, the baiji was declared functionally extinct. However, on November 14, 2018, the IUCN Red List of Threatened Species (IUCN) was updated and released, not confirming the extinction of the baiji dolphin for the time being, and maintaining its original rating of "critically endangered".
On December 23, 2019, a research paper (pre-proof) by experts from the Yangtze River Fisheries Research Institute of the Chinese Academy of Fisheries Sciences was published in the international academic journal Integral Environmental Science: the Yangtze River white sturgeon was expected to have become extinct by 2005-2010.In January 2020, the World Conservation Union (IUCN) responded to the issue by stating that at present, IUCN The IUCN responded by saying that the IUCN has not yet released and updated the news about the extinction of the Yangtze sturgeon, and that "the follow-up needs to be discussed".
The corresponding author of the paper, Dr. Gui Qiwei, chief scientist and researcher at the Yangtze River Fisheries Research Institute of the Chinese Academy of Fisheries Sciences, and initiator of the Wuhan Yangtze River Sturgeon Conservation Center, as well as the only member of the IUCN Sturgeon Specialist Group in China, compared the white sturgeon to the extinct baiji, "It is true that sturgeon is the most threatened taxon in the world. It is true that the sturgeon is the most threatened species in the world, but the extinction of the white sturgeon is still something that should not happen. The different ecological habits of the white sturgeon and the baiji, one of which breeds in the upper reaches of the Yangtze River, and the other whose habitat is mainly in the middle and lower reaches of the river, are not coincidental, and should not be repeated by other aquatic organisms in the Yangtze River."
▲Yangtze sturgeon Guiqiwei photo
Global rescue of freshwater biodiversity is imminent
In recent years, China has been increasing the protection of aquatic life in the Yangtze River Basin. China's Ministry of Agriculture and Rural Development has successively released the Chinese Sturgeon Rescue Action Plan (2015-2030), the Yangtze River Dolphin Rescue Action Plan (2016-2025), and the Yangtze River Sturgeon (Acipenser davidianus) Rescue Action Plan (2018-2035). The plan describes the current status of the Chinese sturgeon as "spawning frequency decreases, the number of migratory populations continues to decrease, and natural populations are in sharp decline", while the Yangtze sturgeon is "natural reproduction is terminated, the wild population is basically extinct, and the artificial population is in urgent need of protection".
Gui Qiwei said, "the Yangtze River sturgeon and Chinese sturgeon should not have only one future of extinction. Their artificial breeding has been a breakthrough, the establishment of a number of artificial groups, but the natural population recovery is a long way to go. Fortunately, the 'great protection of the Yangtze River' has become China's **** knowledge, 'ten years of fishing ban', the Yangtze River Protection Law and other favorable policies have begun to be implemented one after another."
Zhou Fei, Deputy Director General (Programs) of the World Wide Fund for Nature (WWF) Beijing Representative Office, said, "The results of this Red List update remind us of the need to reverse the loss of freshwater biodiversity through salvage conservation.... The trend, more need to plan and implement systematic conservation measures to address long-term threats, we need more organizations and social forces to participate and support, to help the Yangtze River sturgeon early 'degradation', better guard the river and sea migratory sturgeon, *** create a better future for the river and sea ecosystem."
Is it still possible for the Yangtze River white sturgeon to appear2Extinction of the Yangtze River white sturgeon, China's "king of freshwater fish," last seen in 2003
As the saying goes, "A thousand pounds of wax, ten thousand pounds of elephant. " "Lazi" refers to the Chinese sturgeon, "elephant" refers to the Yangtze River white sturgeon. White sturgeon is large, up to seven or eight meters long.
The last appearance of the Yangtze River white sturgeon is the first day of the New Year in 2003, Gui Qiwei and colleagues in Sichuan Yibin Nanxi River rescue a white sturgeon, release and tracking. But then the boat hit the reef and the radio signal of the released white sturgeon disappeared.
"We searched for 8 times along the river in 6 years to no avail, sad!" Gui Qiwei deplored.
No one could have imagined that the loss of this one fish, but also the loss of the entire species. 2003 to the present, researchers have not found the white sturgeon, and no individual of its artificial breeding survives.
Gui Qiwei first saw the Yangtze River white sturgeon in 1984, a dead white sturgeon below the Gezhouba Dam. "White sturgeon individuals are large and very difficult to raise." Between 1984 and 1993, he and his colleagues rescued four trapped white sturgeon, and only one was successfully rescued and released back into the Yangtze River, he said. They have raised the longest survival period of 29 days, is a white sturgeon rescued in 2002 in the Nanjing river section.
In mid-September 2019, a group of experts from the World Conservation Union (IUCN) met for three days in Shanghai around the endangerment assessment of a dozen Eurasian sturgeon species, including the white sturgeon in the Yangtze River. Foreign experts believe that the white sturgeon should be declared extinct.
Previously, Gui Qiwei has disagreed. But this time, Gui Qiwei accepted the results of the assessment of the extinction of the white sturgeon. After years of fruitless monitoring, in recent years, he and his team began to study the status of the white sturgeon according to the IUCN assessment model, and concluded that the white sturgeon may have been extinct between 2005 and 2010, and may have been functionally extinct as early as 1993, that is, the natural population is unable to carry out reproductive activities.
How does the IUCN define the extinction of a species? "In layman's terms, a species can be recognized as extinct if there is no more natural reproduction and the time period of the species' lifespan has elapsed, during which no individuals have been found." Gui Qiwei said, white sturgeon spawning grounds in the upper reaches of the Yangtze River along the Jinsha River, but after 1991, but no natural reproduction of white sturgeon has not been found. 1993 before, every one or two years, there are white sturgeon were mistakenly captured records, but since then for a long time no discovery.
Why can't the white sturgeon realize artificial reproduction? Gui Qiwei explained: First, the transportation conditions were inconvenient, received fishermen bycatch information rushed to the scene, the white sturgeon more than dying; second, the scientific research conditions were limited, breeding white sturgeon need nearly 20 meters in diameter of the pool, and the water requirements are very high, the need for a sufficient supply of oxygen.
"When we have the ability to understand and help it, it is no longer present." Gui Qiwei said regretfully.
In January 2020, Chutian Metropolis Daily was the first to report that the white sturgeon was facing extinction (see our report on January 4, 2020), and netizens lamented the fact that they had never met it, and heard that it was goodbye forever.
The Yangtze River white sturgeon is still possible to appear 3
live 1.5 billion years of the Yangtze River white sturgeon was declared extinct to put the Yangtze River in the fish
White sturgeon (scientific name: Psephurus gladius): the body length of 2-3 meters, body weight of 200-300 kilograms, the largest body length of up to 7.5 meters. Also known as the Chinese spoon-nosed sturgeon, and live in the Mississippi River spoon-nosed sturgeon belongs to the spoon-nosed sturgeon species. Also known as the Chinese swordfish, it is the largest freshwater fish in China. It is also commonly known as the Elephant Fish because of its long, elephant trunk-like kiss.
China's ancient white sturgeon was called tuna. Spring anadromous spawning. Mainly produced in China's Yangtze River from Yibin to the mouth of the Yangtze River in the dry tributaries, the Qiantang River and the Yellow River also found in the lower reaches. It is a rare and valuable animal specialty of our country, belonging to the national level of wildlife maintenance animals, known as the "water giant panda".
As the saying goes, "a thousand pounds of wax, ten thousand pounds of elephant." "Lazi" refers to the Chinese sturgeon, "elephant" refers to the Yangtze River white sturgeon.
White sturgeon large, adult fish can be up to seven or eight meters long, swimming speed, known as the "water monarch". White sturgeon and the Yangtze River sturgeon, the same, is a hundred and fifty million years ago, the Mesozoic Cretaceous remains one of the very few ancient fish.
In 2003, the Yangtze River white sturgeon was last seen in people's vision, when scientists from the Yangtze River Fisheries Research Institute had rescued a Yangtze River white sturgeon and released, and after that, there was no sign of white sturgeon. For more than a decade, it has not been in the fishermen and scientists in the painstaking search to appear.
The picture shows experts rescuing the Yangtze River white sturgeon in 2003.
In the experts' rescue, the white sturgeon's injury recovery is outstanding, such as recovery to have the conditions of release, "King of Fish" white sturgeon was released to the Yangtze River. But the experts did not finish their work, they began to pursue the sonar signal of the white sturgeon, 24 hours without continuity.
January 30, 2003 more than 5:00 in the morning, the pursuit of the ship followed the white sturgeon's "footprints", traced to the Sichuan Yibin Nanxi and Jiang'an County, near the junction of the "Golden Cocktail" section of the river, because of the Yangtze River fog, the pursuit of the ship unfortunately touched the reef, propeller damage, and could not continue to fly, delaying the flight. Damaged, can not continue to fly, delayed six or seven hours. Regrettably, to be corrected by the tracking ship, and then did not find the white sturgeon sonar signals.
Finally a rescue of the Yangtze River white sturgeon, this disappeared in the vast Yangtze River in the ......
The disappearance of the "Yangtze River final white sturgeon" is no more than three kinds of "fate". "
One is dead, extinct;
The second is hiding, human more than ten years of pursuit did not find the sonar signal;
The third is the sonar dropped, white sturgeon out of human monitoring.
"I expect the latter two outcomes." The Yangtze River white sturgeon and the albino dolphin have been designated as "critically endangered" species, and the Yangtze River white sturgeon was declared extinct one step earlier than the albino dolphin.
We have never met, heard that it is forever
For human beings, the extinction of the Yangtze River white sturgeon is a serious alarm. Because the Yangtze River white sturgeon is located in the Yangtze River aquatic organisms at the top of the food chain, its extinction of the Yangtze River aquatic ecological impact is extremely serious, as if a natural area lack of monarchs and lions, downstream hyena will be flooded, not only damage to the biological chain, will also be the formation of a hostage to the human being.
Human activity is an important reason for the degradation of environmental factors, including species habitat reduction, hunting or wildlife trade, global warming, pollution, and invasion of alien species. It can be said that about the Yangtze River over-capture, river pollution, shipping, etc. are very likely to be the Yangtze River white sturgeon extinction of important reasons. Even if people did not capture the Yangtze River white sturgeon, but also because of over-capture of other fish and lead to the Yangtze River white sturgeon food cuts, making them difficult to make a living, difficult to reproduce, until gradually disappeared. So it's urgent to complete the 10-year ban on fishing and trapping on the Yangtze River. The only way to not let the Yangtze River white sturgeon disappear after the Chinese sturgeon and other important fish extinction, but also to prevent the "posterity and not learn from it, but also so that the posterity and the posterity of the posterity of grief also" consequences.
Fish should be released, people should reflect.
Fish to the utmost is no fish, respect the rules is no worry,
The rise and fall of fish, the essence of the natural light for the development of the indicator.
Give the Yangtze River a ten-year break, and the Yangtze River can return to the international scene.