The Yangtze River white sturgeon since the ban there

The Yangtze River white sturgeon since the ban there, animals in our lives in fact, we have learned a lot, we have a lot of animal species in China, but there are many animals because of a variety of factors slowly towards extinction, the following Yangtze River white sturgeon since the ban there.

The Yangtze River white sturgeon since the ban there is 1

The Yangtze River white sturgeon, known as the "king of Chinese freshwater fish", was officially declared extinct by the World Conservation Union (IUCN).

The World Conservation Union (IUCN) updated the 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 'world's most threatened taxon'."

The white sturgeon was 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 iconic aquatic species of the Yangtze River basin. 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 this issue by stating that at present, the 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 (Dabbling Sturgeon) 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, "Yangtze River sturgeon and Chinese sturgeon should not be the only extinction of a future. 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 that we need to reverse the trend of freshwater biodiversity loss through salvage conservation, and more importantly, we need to plan and implement systematic conservation measures to address the long-term threats, and we need the participation and support of more organizations and social forces to help the Yangtze sturgeon to be protected as soon as possible. support to help the Yangtze sturgeon to 'downgrade' as soon as possible, to better protect the river and sea migratory sturgeon, and *** create a better future for the river and sea ecosystem."

Yangtze River white sturgeon since the ban there is 2

Yangtze River white sturgeon is what fish

White sturgeon is 150 million years ago, the Mesozoic Cretaceous period survived one of the few ancient fish, the distribution is extremely narrow, the world is only China, also known as the "Yangtze River White Sturgeon It is also known as the "Yangtze River White Sturgeon". Mainly concentrated in the Yangtze River Basin area, known as the "living fossil in the Yangtze River", very academic research value, belongs to China's first-class protection of wildlife. White sturgeon, also known as "elephant fish", is the first freshwater fish family "giant", up to 7 meters long, weighing up to 700 kilograms, its life expectancy is generally about 30 years.

Beluga sturgeon has a distinctive feature: the head is very long, accounting for 1/3 of the body length, small individuals accounted for about .1/2 of the body length, the cloth has a plum-shaped sensory organs - trap. The muzzle is prolonged, sword-shaped, its ventral surface with a pair of short whiskers. The eyes are very small.

The mouth is large, inferior, arcuate, and finely dentate in both upper and lower jaws. The gill pores are large and the posterior margins of the gill membranes are pointed. The body surface is smooth and scale-free. Inhabiting the lower and middle layers of the river, sometimes into large lakes. White sturgeon is the second only to the Chinese sturgeon in the Yangtze River in the large ancient fish, up to two or three meters long, due to the deterioration of the ecological environment, the white sturgeon distribution area is gradually shrinking, the number of years to reduce, the individual is getting smaller and smaller. White sturgeon is a typical carnivorous fish, food, including fish, shrimp and crab.

Sichuan fishermen have "a thousand pounds of Lazi, ten thousand pounds of elephant". "Elephant" refers to the Yangtze River white sturgeon, it is said that it can grow to tens of thousands of pounds. White sturgeon is a large, fast swimming, known as the "water tiger", "China's king of freshwater fish", it is also one of the world's ten largest freshwater fish.

The last white sturgeon found in the Yangtze River was 17 years ago

Researchers rescued the white sturgeon, an endangered species.

The white sturgeon was last seen on the first day of the Chinese New Year in 2003. On January 23rd of that year, experts from the Yangtze River Fisheries Research Institute of the Chinese Academy of Fisheries rescued a white sturgeon in the Nanxi River section of Yibin, Sichuan Province. After that, the experts to the white sturgeon installed ultrasonic tracker released into the Yangtze River, but the Yibin River section of the water flow is too large, coupled with the dangerous shoals, tracking the ship after the loss of signal reef. After the tracking ship repair, the signal never recovered.

What caused the extinction of the white sturgeon?

Man-made causes of white sturgeon extinction must be essential. As a former aquatic resource, it has been overfished for a long time. However, the white sturgeon's sexual maturity time of nearly 7 to 8 years, artificial breeding has been unsuccessful, and therefore failed to leave cells, fertilized eggs, tissues and other structures.

The construction of hydroelectric power stations in various sections of the Yangtze River has divided the river into several sections, and the white sturgeon upstream and downstream are not able to communicate with each other, which has divided the originally small population even smaller.

The white sturgeon is a large predator, the reduced range of activities means that it can choose to reduce the feeding area, can not meet enough food. And the small, interconnected areas also pose a barrier to reproduction among white sturgeon.

What are the other endangered species in the Yangtze River Basin?

The king of the Yangtze River fish: Chinese sturgeon

Chinese sturgeon is China's unique ancient rare fish, the national level of protection of wildlife, known as the "aquatic pandas" and "living fossil". "living fossil". According to reports, in 2013, 2015, 2017 and 2018, the research organization did not monitor the natural spawning of wild Chinese sturgeon in the Yangtze River, 2019 is still under monitoring, in general, the survival of wild Chinese sturgeon is not optimistic.

Giant pandas in the water: albino dolphins

The albino dolphin is a small cetacean that lives in the middle and lower reaches of the Yangtze River, and its numbers have declined sharply since the 1980s, and it was classified as a protected species in 1983, with an estimated number of 300 in 1986, and the number of albino dolphins surveyed in 2002 was no more than 50. In 2007, the Royal Society Biological Letterhead officially announced the functional extinction of the albino dolphin.

Just on April 18, 2018, a social organization claimed to have photographed a suspected albino dolphin in the waters of Banziji in the Wuhu section of the Yangtze River, which once again attracted attention. After that, China's Ministry of Agriculture and Rural Development immediately organized freshwater dolphin research experts to identify the dolphin, but due to lack of clarity can not be confirmed, and then urgently organized the relevant experts and personnel and invited representatives of volunteers to go to the discovery of the waters together to carry out an emergency inspection, but still nothing.

This gives us hope that the albino dolphin may not be extinct in the wild!

One of the smallest crocodiles: the Chinese alligator

The Chinese alligator is the smallest of the existing crocodiles, the slowest to act, and the most gentle crocodile, and the number of existing crocodiles is very small, and has been on the verge of extinction, but because of the Chinese alligator's characteristics, Xuancheng, Anhui Province, has set up the only alligator protection zone! --However, because of the crocodile's life characteristics, Xuancheng, Anhui Province, has established the only Yangtse Alligator National Nature Reserve, which produced China's first baby crocodiles in 1980. The Yangzi crocodile has bred in the reserve and the population has gradually expanded under careful human protection!

Smiling Goddess: Yangtze Finless Porpoise

The Finless Porpoise is usually found in freshwater and seawater, but it can also live in freshwater, and prefers to be alone. It is distributed in the middle and lower reaches of the Yangtze River, mainly in Dongting and Poyang Lakes, and in the mainstem of the Yangtze River, and it was listed as a critically endangered species on the IUCN Red List of Threatened Species in 2013. Red List of Critically Endangered Species, and on May 9, 2017, the Yangtze finless porpoise was upgraded to a national-level protected animal.

Ten-year fishing ban program implemented on the Yangtze River

The Ministry of Agriculture and Rural Development recently issued a circular on the scope and time of the fishing ban in key waters of the Yangtze River Basin. Circular clear, the Yangtze River Basin Aquatic Life Protection Zone, since January 1, 2020, the first to implement a comprehensive ban on fishing; the Yangtze River and important tributaries in addition to the protection of the natural waters outside the zone, at the latest since January 1, 2021, the implementation of a tentative period of 10 years of year-round ban on fishing, which prohibits the natural fisheries resources of the production of fishing. This unprecedentedly strict ban on fishing measures for the Yangtze River Basin to get rid of the "no fish" predicament brings hope.

I hope that under the protection of mankind, the Yangtze River will become more and more beautiful, more and more clear, these endangered elves can one day swim in the Yangtze River again.

The Yangtze River white sturgeon self-banned there are still 3

White sturgeon extinction

White sturgeon extinction. It is estimated that the Yangtze River white sturgeon was extinct between 2005 and 2010.

The last time we saw a white sturgeon hatchling was back in the early 90's. In the past 30 years, no natural reproduction of white sturgeon has been found. People are not sure of the exact lifespan of the white sturgeon, but it is estimated that its natural survival time should be around 30 years. 2003, the last wild white sturgeon signal disappeared in the tracker, and the white sturgeon has not survived in captivity.

The white sturgeon (scientific name: Psephurus gladius) is 2 to 3 meters long and weighs 200 to 300 kilograms, with the largest up to 7.5 meters long. Also known as the Chinese spoon-nose sturgeon, and live in the Mississippi River spoon-nose sturgeon belongs to the same spoon-nose sturgeon species. Also known as the Chinese swordfish, it is the largest freshwater fish in China. It is also known as the Elephant Fish because of its long, elephant-like muzzle.

In ancient China, the white sturgeon was called tuna. Spawning in the spring anadromous. Mainly in the Yangtze River in China from Yibin to the mouth of the Yangtze River in the dry tributaries, Qiantang River and the lower reaches of the Yellow River is also found. It is a rare and precious animal specialty of China, belonging to the national level of wildlife protection, and is known as the "water giant panda".

January 2, 2020 news, the Yangtze River white sturgeon did not make it to 2020, was declared extinct on December 23, 2019 .