Acipenser sinensis all appeared in the Upper Cretaceous at the end of Mesozoic, about 65.438+0.4 billion years ago. China once found sturgeon fossils in the Late Jurassic strata of Beipiao, Liaoning Province (65.438+0.4 billion years ago), and named them Beipiao sturgeon. This sturgeon has only one line of lateral line scales on both sides, and the other body surfaces are bare, which is different from that of Chinese sturgeon with five lines of scales.
As early as the Zhou Dynasty in 65438 BC+0,000 BC, China people called the Chinese sturgeon "the king of tuna". Acipenser sinensis belongs to the order ACIPENSER. Sturgeon first appeared in the early Triassic 230 million years ago and has continued to this day. It is really a "living fossil".
According to 1834, the model origin of ACIPENSER sinensis is China. Although it is not a specialty of China, it is famous for its model origin in China. Later, according to the history of China at that time and the work of later generations, it was speculated that it was Guangzhou. Widely distributed in the coastal areas of Dalian, Lushun, Liaodong Bay and Liaohe in China's Bohai Sea. Islands, the Yellow River in northern Liaoning Province and the Yalu River, the border river between China and Korea; Shidao, Yellow River, Yangtze River, Qiantang River, Ningbo River, Minjiang River, Xiong Ji City, Taiwan Province Province, and the Pearl River system. It can reach the lower reaches of the Yangtze River Jinsha River; In the Pearl River system, it can be traced back to Xijiang, Beijiang to Ruyuan, and even to Jiang Xun, Yujiang and Liujiang in Guangxi. It is also produced along the coast of Hainan Province. It is also found in the mouth of Hanjiang River in South Korea and the west side of Lijiang and Kyushu in Japan.
Acipenser sinensis: The average body length is about 40 cm, the longest is 130 cm, and the maximum weight is 600 kg. The body is spindle-shaped, with a long tip and four whiskers in front of the mouth. The mouth is located on the ventral side, which is elastic and can be stretched into a tube. The body is covered with five lines of large and hard bone scales, one on the back and two on the side and abdomen. Sturgeon is a rare ancient fish left over from Mesozoic10.5 billion years ago. Between cartilage and hard bone, the degree of ossification of bone generally decreases. The central axis is an elastic notochord without ossification of vertebral body, and most of the cartilaginous shells along the skull are not ossified. The caudal fin is curved, the base of the lateral fin is broad, and the dorsal fin is opposite to the gluteal fin. The ventral fin is located in front of the dorsal fin, with spiny scales at the base of the fin and caudal fin, spiral valves in the intestine, anus and drainage holes close to the base of the ventral fin, and the opening of fallopian tube far from the ovary.
In summer and autumn, the Chinese sturgeon, who lives in the shallow water outside the Yangtze River estuary, swam back to the Yangtze River and returned to the Jinsha River to lay eggs and breed after fighting for more than 3,000 kilometers upstream. After giving birth, the young fish grow to about 15 cm and live with them in the open sea. In this way, they were born in the upper reaches of rivers and grew up in the sea for generations.
The life cycle of Chinese sturgeon is long, and the longest life span can reach 40 years. It is a national first-class protected wild animal and a living fossil, and is known as the "giant panda in the water". It has high scientific research, medicinal and ornamental value. China, Japan, Korea, Lao People's Democratic Republic and Korea.