Sturgeon is a kind of fish, which is an animal of fish class, sturgeon, sturgeon. Found in coastal areas and main waters in the north and south, it is a large econ
Sturgeon is a kind of fish, which is an animal of fish class, sturgeon, sturgeon. Found in coastal areas and main waters in the north and south, it is a large economic fish. It is one of the few living fossils living in water in the world, and it is a fish with the highest nutritional value. Sturgeon eggs can be used as caviar.
Although sturgeon is a large fish, it is gentle and not good at jumping. Living in the middle and lower layers of water, it belongs to benthic sub-cold water fish. There are two kinds of migration: Haihe migration and river migration, and half of them are anadromous spawning fish. Except for Chinese sturgeon, giant salamander and Chinese sturgeon, most species of Chinese sturgeon live in sub-cold water environment, and the water temperature that Chinese sturgeon can tolerate is 0-30℃, with slight differences among different species. When the dissolved oxygen is greater than 6 mg/L, the growth is faster.
Sturgeon feeds on animal food by stretching and sucking the oral membrane. Young sturgeons mainly feed on benthic invertebrates, such as crustaceans, chironomids, trichoptera larvae, caterpillars and so on. And organic matter in algae and sediments.
Sturgeon is very strict about spawning grounds. They sometimes swim thousands of kilometers upstream in the natural environment, looking for suitable spawning grounds. If the female fish's migration path to the spawning ground is cut off by the dam and no suitable spawning environment can be found, the female fish's follicles will degenerate and be absorbed. Sturgeon dragon, also known as sturgeon, is a large and medium-sized economic fish and a precious fish species. By the end of June, 20 14, there were more than 20 species of * * * in the world, including 8 species in China. Russian sturgeon is mainly distributed in Caspian Sea, Azov Sea, Black Sea and rivers connected with these basins in Russia.
The eggs of sturgeon are large and full, with bright black color, rich in 17 amino acids and various trace elements, and are known as black gold. Caviar made from sturgeon roe is a precious delicacy and was once a royal tribute. In the west, tasting sturgeon caviar is also a patent of the upper class, even a symbol of status and status.