Chinese sturgeon can't eat, and it belongs to protected animals. 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". China, Japan, South Korea, Laos and North Korea. In China, it is mainly distributed below the Jinsha River in the main stream of the Yangtze River to the estuary, and other water systems such as Ganjiang River, Xiangjiang River, Minjiang River, Qiantang River and Pearl River occasionally appear.
Acipenser sinensis is slender, spindle-shaped, with a pointed head and a low mouth, which is transversely cracked. There are two pairs of beards in front of the mouth and abdomen. There are 5 ribs of hard scales on the body surface, with back 1 row, body side 2 rows and abdomen 2 rows. Tail fin is a curved tail with long upper leaves and short lower leaves. From September to June every year, 165438+ 10, it goes upstream along the Yangtze River from Haikou to Jinsha River to Pingshan.
Life habits of Chinese sturgeon
Acipenser sinensis is a kind of benthic fish, which belongs to omnivorous fish with animal food as the main food. It mainly feeds on some small or slow-moving benthos, including shrimp, crab, fish, mollusks and aquatic insects. Because the living environment is different, the types of food are also different. Young fish mainly feed on chironomid larvae, dragonfly larvae, mayfly larvae and plant debris in the middle and upper reaches of the Yangtze River, while young fish in the salty and fresh water area of the estuary feed on shrimp, crab and small fish.
Acipenser sinensis does not eat during migration. In the offshore waters outside the Yangtze estuary, the feeding intensity of Chinese sturgeon increased, generally at level 3 to 4. The food is mainly fish and crabs, as well as shrimp and cephalopods.