1. Generally speaking, sturgeons can only take fish eggs 1 time in their lifetime. 2. Under normal circumstances, sturgeon can survive after taking out fish eggs, and now the survival rate of taking eggs alive has reached 93%. 3. When taking eggs, the sturgeon parent fish whose ovaries have developed to the end of ⅳ should be selected, injected with luteinizing hormone releasing hormone analogues, and anesthetized after their ovaries are free. 4. Insert the knife into the fish skin, and then pick out the roe with a ball-end milling cutter. The whole process should not exceed 1 min.

1. How many times can sturgeon eat fish eggs in its life?

1. How many times do sturgeons eat fish eggs?

Under normal circumstances, sturgeon can only ingest 1 fish egg in its lifetime.

2. Characteristics of sturgeon

(1) Sturgeon is one of the earliest living vertebrates, belonging to teleost, Actinidia, Chondroscleroderma and Acipenseriformes, and it is one of the most primitive fish groups.

(2) There are 27 species of sturgeon 1 order, 7 genera and 2 families in the world, which are only distributed in the northern hemisphere. There are 9 natural distribution areas, which are located in the east coast of the Pacific Ocean, the Great Lakes of North America, the Northwest Atlantic Ocean, the Mississippi River Basin and the Gulf of Mexico, the Northeast Atlantic Ocean, the Caspian Sea, Siberia and the Arctic Ocean Basin, the Heilongjiang River Basin and the Sea of Japan, the Yangtze River and the Pearl River Basin.

(3) Due to the change of natural environment, the construction of water conservancy facilities and overfishing, the wild sturgeon resources in the world have decreased in recent years and are in an endangered state.

Second, can sturgeon caviar survive after it is taken out?

1. Can sturgeon survive after taking out caviar?

Usually sturgeon can survive after taking out caviar, and the survival rate can reach 93% after taking eggs in the body.

2. How to get caviar

(1) Select sturgeon parent fish whose ovaries have developed to the end of the fourth stage, inject luteinizing hormone-releasing hormone analogues, and anesthetize the parent fish with water containing 80- 120ppm clove oil after the ovaries are completely free.

(2) Then scrape the epidermis mucus with a knife, and then insert the knife into the fish skin about two centimeters deep.

(3) In order not to hurt the internal organs of the fish, and to prevent the blood from polluting the roe, it is necessary to remount the ball-end milling cutter, cut the belly of the fish quickly, and pick out the roe.

(4) In order to ensure the survival rate of sturgeon after egg retrieval, the whole process of egg retrieval in vivo generally does not exceed 1 min.