Method for cultivating young rapana venosa in rapana venosa artificial breeding

Abstract

The invention relates to a method for cultivating young rapana venosa in rapana venosa artificial breeding. The method is characterized in that firstly, after rapana venosa larvae with the size larger than 1200 micrometers and to be metamorphosed through attachment are collected, then placed in a container containing 10L-12L of a 0.2%-0.3% KCI seawater solution and steeped for 6 hours to 8 hours, so that the rapana venosa larvae is directly metamorphosed without attachment and the young rapana venosa is obtained; secondly, the young rapana venosa is placed in a floating net cage with the length of 5m-6m, the width of 2m-3m and the height of 0.3m-0.4m and made of a polyethylene screen with 60 meshes to 80 meshes, the size of the floating net cage is determined, and the four sides of the floating net cage have the buoyancy force; thirdly, the rapana venosa is fed on oyster paste twice to three times every day, the water level is kept low when feeding is conducted, the floating floating net cage is sunk to the bottom of the pool, bait sunk to the bottom of the floating net cage and attached to a base is eaten by the young metamorphosed rapana venosa, and after feeding is conducted for 3 hours to 4 hours, water is added, the water level rises, the floating net cage is floated, the bottom of the pool is absorbed, and therefore feces and the residual bait remaining on the bottom of the pool are thoroughly cleaned. According to the method for cultivating the young rapana venosa in rapana venosa artificial breeding, the problems that according to a method for indoor rapana venosa breeding, the use ratio of the fed carnivorous oyster paste bait is low and water is prone to pollution are solved and due to the fact that the residual bait and the feces are cleaned in time, water is not polluted, the young rapana venosa lives in water with high quality from beginning to end, the survival rate of the young rapana venosa is high, the breeding amount is improved by over 60%, and the cultivated young rapana venosa is strong.

Description

technical field [0001] The invention relates to a method for artificial seedling cultivation of red snails, in particular to a method for cultivating juvenile snails in artificial seedlings of red snails. Background technique [0002] Rapana Venosa (Rapana Venosa), also known as red snail, is a unique economic shellfish that lives along the coast of the Yellow Sea and Bohai Sea. Because the red snail has the advantages of fast breeding growth, short breeding cycle, strong disease resistance, high survival rate, and significant economic benefits, the scale of its breeding is constantly expanding, so the demand for seedlings is also increasing. As the red snail is a carnivorous shellfish, the carnivorous bait is mainly used after the juvenile snail is attached to the board, so the bait conversion after the attached board is the bottleneck of the cultivation of the juvenile snail. Low, can not reach the level of production, can not meet the needs of breeding units for seedling...

AI Technical Summary

Problems solved by technology

[0005] The cultivation method of the present invention can overcome the problems of low bait utilization rate and easy pollution of water quality in feeding carnivorous oyster minced meat in the indoor seedling cultivation of red snails. Since the residual bait feces can be removed in time without polluting the water quality, the juvenile snails are always in high-quality water quality Among them, the survival rate of juvenile snails is high, the emergence rate can be increased by more than 60%, and the seedlings produced are robust

Images