Dabry's sturgeon

Dabry's sturgeon (Acipenser dabryanus) is a species of fish in the sturgeon family, Acipenseridae. Other common names include Yangtze sturgeon, Chiangjiang sturgeon, and river sturgeon. It is endemic to the Yangtze River Basin in China. It was a food fish of commercial importance. Its populations declined drastically, and in the early 1980s, it was designated an endangered species and commercial harvest was banned. It has been listed as a critically endangered species by the IUCN since 1996 and since 2010 (possibly extinct) has been added to its status.

This sturgeon has been known to reach 2.5 m in length, but it is usually much smaller. Its body is blue-gray above and yellowish white on the belly, with five rows of scutes. The head is triangular and the snout is long with the mouth located on the underside. There are two pairs of barbels.

The fish lives in slow-moving river waters over substrates of sand and mud. It feeds on aquatic plants, invertebrates, and small fish. This species is potamodromous, taking part in a migration, but never leaving fresh water. It spawns in the upper Yangtze, mainly during March and April, and sometimes around November and December. Males spawn each year, but most females do not. The female produces 57,000 to 102,000 eggs.

Yangtze

The Yangtze River (English pronunciation: /ˈjæŋtsi/ or /ˈjɑːŋtsi/), known in China as the  Cháng Jiāng (literally: "Long River") or the  Yángzǐ Jiāng, is the longest river in Asia and the third-longest in the world. It flows for 6,300 kilometers (3,915 mi) from the glaciers on the Qinghai-Tibet Plateau in Qinghai eastward across southwest, central and eastern China before emptying into the East China Sea at Shanghai. The river is the longest in the world to flow entirely within one country. It drains one-fifth of the land area of the People's Republic of China (PRC) and its river basin is home to one-third of the country's population. The Yangtze is also one of the biggest rivers by discharge volume in the world.

The Yangtze River plays a large role in the history, culture and economy of China. The prosperous Yangtze River Delta generates as much as 20% of the PRC's GDP. The Yangtze River flows through a wide array of ecosystems and is itself habitat to several endemic and endangered species including the Chinese alligator, the finless porpoise, the Chinese paddlefish, the (possibly extinct) Yangtze River dolphin or baiji, and the Yangtze sturgeon. For thousands of years, the river has been used for water, irrigation, sanitation, transportation, industry, boundary-marking and war. The Three Gorges Dam on the Yangtze River is the largest hydro-electric power station in the world.

Chinese sturgeon

The Chinese sturgeon (Acipenser sinensis; Chinese: 中华鲟; pinyin: zhōnghuá xún) is a critically endangered member of the family Acipenseridae in the order Acipenseriformes. Historically, this anadromous fish was found in China, Japan, and the Korean Peninsula, but it has been extirpated from most regions due to habitat loss and overfishing.

It is strictly protected by the Chinese government, named a "national treasure" much like its mammalian counterpart, the giant panda. China has several conservation programmes, including reserves specifically aimed at this species and restocking through release of juveniles in the Yangtze River.

Physical appearance

Sturgeon are comparatively basal species of fish, whose earliest fossils date back to the Cretaceous period. They are best known members of the bony fish taxon Chondrostei, a group of bony fishes that have cartilaginous skeletons superficially similar to the skeletons seen in the unrelated chondrichthyan fishes. In Qing Dynasty Chinese cuisine, its meat and cartilaginous skeleton was often cooked and served together, and considered a delicacy.

National Geographic

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Chinese

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