Recently, with the implementation of the ten-year ban on fishing in the Yangtze River, the news that the Yangtze River white sturgeon was declared extinct still makes everyone very sad!
Although some international agencies say that it is too early to declare extinction! But it is almost certain that this species has been sentenced to death!
Others, who have already been sentenced to death, are the famous white-tipped dolphins;
Endangered are the Chinese sturgeon, The Yangtze River Sturgeon and the Yangtze River Porpoise;
<h1 class="pgc-h-arrow-right" > yangtze river white sturgeon, no doubt the fish king of the Yangtze River! </h1>
In the past, The fishermen of the Yangtze River had the saying of "a thousand pounds of wax and ten thousand pounds of elephants", and the elephant here refers to the Yangtze River white sturgeon, because there is a huge front kiss, like the big nose of an elephant, so it is called an elephant trunk fish!
Chinese sturgeon, almost 700 kilograms long, that is, more than 1400 kilograms, so a thousand pounds of wax, is accurate;
White sturgeon, the largest individual found by humans is more than 7 meters, thousands of pounds, is several times the Chinese sturgeon, ten thousand pounds can not reach, half is no problem!
Yangtze River white sturgeon
Yangtze River White Sturgeon Stamps (1994)
We are actually difficult to find a decent physical photo of the Yangtze River white sturgeon now, which makes people feel sorry!
<h1 class="pgc-h-arrow-right" > the Yangtze River white sturgeon memorabilia</h1>
In the 1271-1840s, that is, in the three dynasties of the Yuan, Ming, and Qing dynasties, the white sturgeon gradually disappeared from the Yellow River Basin, but only existed in the Yangtze River Basin;
In the 1970s, 25 tons of white sturgeon were caught annually in the yangtze river section, indicating that the number was still large!
On January 4, 1981, the Gezhouba River (330 Project) intercepted the flow! The traditional fish road is cut off! Cause serious difficulties for white sturgeon breeding!
In 1983 and 1987, the List of Wild Animals under Key Protection listed the white sturgeon as a rare and rare animal under key protection;
After 1985, no supplementary population of juvenile sturgeon in the Yangtze River has been found in the whole section of the river.
In 1993, adult individuals of white sturgeon were found in the Yichang River section; at about the same time, functional extinction!
According to preliminary statistics in 1999, the amount of white sturgeon resources has been less than 400;
In December 2002, a middle-aged female white sturgeon was captured in Xiaguan, the Nanjing section of the Yangtze River, and died of unsuccessful treatment!
In January 2003, Yibin, Sichuan Province, captured a white sturgeon and disappeared after release;
Since then, the entire section of the Yangtze River has no sound or shadow...
Around the time of the 2008 Beijing Olympics, the last possible Yangtze River white sturgeon died... After that, there was not even a suspicious signal...
<h1 class = "pgc-h-arrow-right" > a close American relative , the Mississippi spoon sturgeon</h1>
It has been able to be artificially farmed, commercially developed, and also introduced to China.
Kiss flattened American close relatives
< h1 class= "pgc-h-arrow-right" > when is the rescue window period for Yangtze River white sturgeon species? 1978-1985! </h1>
In the 1970s, 25 tons of white sturgeon were caught annually in the yangtze river section, indicating that the number was still large! There are conditions to save this species!
However, in that era, it also partially continued the thinking of the grain-based era, and for hybrid rice, projects directly related to people's livelihood, huge amounts of money could be invested, but for the urgency of saving the white sturgeon, it was obvious that from the perspective of decision-making, it was insufficient to invest!
Also in the early stage of reform and opening up, looking forward to industrial civilization, including the demand for power generation,
And gezhouba fish road design self-deception! It is even more misleading to make decisions!
For large species such as the white sturgeon, artificial breeding has not been achieved like the Chinese sturgeon!
Without the regeneration of newborn fry, the white sturgeon is finally and inevitably going extinct!
<h1 class= "pgc-h-arrow-right" > pain, saving the white sturgeon, in fact, is still easier than saving the white sturgeon</h1>
The baiji dolphin is a higher mammal, viviparous, breeding or not easy, it is difficult to rapidly expand the population;
The white sturgeon is a fish, with a huge spawning capacity and conditions for expansion;
Chinese sturgeon, and another small Yangtze River sturgeon (Dashi sturgeon) rely on this to at least achieve seed preservation under artificial breeding!
However, this crucial step did not mobilize enough economic forces to complete the rescue of the Yangtze River white sturgeon!
American close relatives, on the contrary, can achieve commercial breeding, which is the different fate of the two species!