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Chinese sturgeon

Chinese sturgeon (Picture 1)

The Chinese sturgeon is an upstream fish spawning fish. They fly to the upper reaches of the Yangtze River from October to November every year. Subsequently, the seedlings descended down the river, stayed in the Yangtze River estuary, and then developed in the sea. After sexual maturity, the Chinese scorpion swims back to the Yangtze River and continues to breed offspring, with a round-trip path of more than 5,000 kilometers. It is precisely because of this persistent "think of the roots" habit, people call it "Chinese sturgeon." The Chinese sturgeon has a long life cycle, with a longest life span of 40 years, an average body length of about 40 cm, a maximum length of 200 cm, and a weight of up to 500 kg. It is a first-class protected wild animal in China, and it is also a living fossil. It is called “the giant panda in the water”. It has high scientific research, medicinal and ornamental value. Distributed in China, Japan, South Korea, Lao People's Democratic Republic and North Korea.

The Chinese sturgeons of the Chinese sturgeon were found in the Upper Cretaceous period of the end of the Mesozoic period of about 140 million years ago. China was found in the strata of Liaoning Beibei late Jurassic (140 million years ago). Over the fossils of the genus, the name of the North ticket. This kind of cockroach has only one line of sideline scales on both sides of the body, and other body parts are bare, which is different from the Chinese corpus callosum. In the Zhou Dynasty, which was more than 1,000 years before BC, the Chinese called the Chinese scorpion a king carp. The Chinese sturgeon is a bony fish. The scorpion first appeared in the Early Triassic dating back 230 million years ago and has continued to this day. It is truly a "living fossil".

In the 1970s, the breeding population in the Yangtze River could reach more than 10,000 tails. In the 1980s, the Gezhouba interception was suddenly reduced to 2,176. In 2000, there were only 363. In 2010, only 57 were estimated. On December 31, 2014, the Institute of Hydrobiology of the Chinese Academy of Sciences, the Yangtze River Fisheries Research Institute of the Chinese Academy of Fishery Sciences, and the Institute of Water Engineering Ecology of the Chinese Academy of Sciences of the Ministry of Water Resources unfortunately ended the 2014 joint monitoring of natural spawning of wild Chinese sturgeon. The monitoring results showed that the wild Chinese sturgeon was found to be naturally spawned. This is also after the 2013 year, once again failed to monitor the natural spawning of wild Chinese sturgeon.

Since the closure of the Gezhou Dam in 1981, the Ministry of Agriculture has taken decisive measures. Strictly limit the number of fishing and the location and time of fishing in China for artificial breeding and scientific experiments, protect the young Chinese sturgeons along the Yangtze River and the estuary area, and expand the scale of artificial breeding and release of the Chinese sturgeon. In the upper reaches of the Yangtze River, Yibin City, each year to the Yangtze River The cultivation of Chinese sturgeon seedlings will enable the long-term survival and reproduction of this rare species of Chinese sturgeon. China has established three Chinese sturgeon conservation areas, namely the Shanghai Huajiangyu Nature Reserve in the Yangtze River Estuary, the Yichang Zhonghuayu Nature Reserve in Hubei Province, and the Zhonghuatun Nature Reserve in Dongtai City, Jiangsu Province. Studies have shown that due to the comprehensive protection measures for Chinese sturgeon, the process of the decline of Chinese sturgeon resources has been postponed, and the upstream spawning broodstock has been basically preserved, laying a foundation for the natural reproduction, research and proliferation of Chinese sturgeon, Chinese sturgeon species. The number has begun to pick up.

A total of 12 high-resolution pictures:
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