A method for cultivating large-sized seedlings of flat scorpionfish in deep water net cages

Abstract

The invention discloses a method for cultivating large-sized seedlings in deep-water net cages of scorpionfish Xu's, which comprises the following steps: 1) sea area selection; 2) net cage setting; 3) seedling selection; 4) transportation mode; 5) fry feeding 7) breeding and breeding management; 8) disease prevention; the present invention breaks through the key to the large-scale seed cultivation technology of Scorpene scorpionfish through inventions such as the design of the inner and outer nets of the cage, transportation methods, full artificial compound feed feeding and disease prevention and control. , compared with the prior art, it can improve the survival rate and the average growth rate of the scorpionfish fry, shorten the breeding cycle, reduce the production cost, and can meet the requirements of large-scale and high-quality breeding fry. The operation process is simple and convenient. It is convenient and efficient, and has laid a foundation for the large-scale seedling cultivation of Xu's flat scorpionfish.

Description

technical field [0001] The invention belongs to the technical field of fish breeding, and in particular relates to a method for cultivating large-sized seedlings of the scorpionfish in deep-water net cages. Background technique [0002] Xu's flat scorpion (Sebastes schlegelii), also known as black scorpion, commonly known as black fish, black head fish, black village, black rock perch, black grouper and black wife, belongs to Scorpaeniformes (Scorpaeniformes), Scorpaenidae (Scorpaenidae), scorpion genus ( Sebastes), mainly distributed in my country's Yellow Sea, Bohai Sea, and East China Sea, and also commonly found in the Korean Peninsula, Japan, and the Sea of ​​Okhotsk. It is a cold-temperate bottom rock fish in the coastal waters, and its feeding habits are carnivorous. Because of its delicious meat and rich nutrition, it is known as "black grouper". It has the advantages of strong reproductive ability, wide temperature range, strong adaptability, small migration range, a...

AI Technical Summary

Problems solved by technology

[0009] a. Since the flat scorpionfish is a bottom rock fish, this method of cultivating seedlings makes the fry of the flat scorpionfish greatly affected by the growth environment of the indoor breeding pond, and the growth rate is slow;

[0010] b. As the size and quality of the fry increase, the feeding ability increases, the breeding density increases, and the amount of breeding water also increases. At this time, it is necessary to divide the fry into ponds and cultivate them in time, resulting in a significant increase in water, electricity and labor costs;

[0011] c. If the fish feces and residual bait are not cleaned up in time, it is very easy to breed bacteria, viruses and other diseases

[0012] 3. After artificially bred seedlings are bred to an average length of 12.0cm in the factory workshop, if the adult fish are cultured directly in the indoor breeding pond, the growth rate will be slow and the growth cycle will be prolonged; When the fry with an average length of 12cm are transferred to deep-water net cages for breeding, the spines on the back of the fish will become sharper after the fish grow larger, and the long-term transportation will cause the fry to stab each other, which will lead to bacterial infection and make them survive. rate reduction

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