Method and device for ecologically breeding rapana venosa seedlings in pond

Abstract

The invention discloses a method and a device for ecologically breeding rapana venosa in a pond. The method for ecologically breeding the rapana venosa in the pond comprises the following steps of a standardized culture pond is selected firstly; a large purse seine ecological system is erected, wherein the closed large purse seine ecological system is built in the pond; parent rapana venosa is selected; rapana venosa parent shellfish are temporarily reared in a mesh cage, and male and female rapana venosa parent shellfish are mated to produce yellow chrysanthemum petal-shaped egg bags; the egg bags are collected and hatched; when rapana venosa larvae are bred to reach the four-spiral-layer initial larvae, a corrugated plate is placed at the bottom of the large purse seine ecological system, and scallop strings are tied, so that benthic organisms are attached, the four-spiral-layer larvae of the rapana venosa are subjected to post-attachment and metamorphosis to form young rapana venosa, the young rapana venosa grows by using the attached benthic organisms as food, and the young rapana venosa is collected until the breeding specification is reached. The method for ecologically breeding the rapana venosa in the pond aims at the technical problem of rapana venosa seedling raising, a new seedling raising mode is developed according to food chain research under natural ecology of the rapana venosa, meanwhile, the seedling raising cost is reduced, and the method conforms to the green, ecological, healthy and environment-friendly development concepts of aquaculture.

Description

technical field [0001] The invention relates to a method for raising seedlings of red snails, in particular to a method for ecological seedling cultivation of red snails in ponds. Background technique [0002] Vein red snail ( Rapana Venosa ), also known as red snail, is a unique economic shellfish living along the coast of the Yellow Sea and the 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, its breeding scale is constantly expanding, so the demand for its seedlings is also increasing. However, the cultivation of snail seedlings is still in the experimental stage. [0003] As the red snail is a carnivorous shellfish, an important factor leading to the immature breeding technology of the red snail seedlings is the failure to solve the problem of the diet conversion of the young snails. In the process, it is necessary to switch from eating p...

AI Technical Summary

Problems solved by technology

At present, there is a cultivation method for using oyster spat to convert the feeding habits of snail larvae, but the effect of raising snails is still not very satisfactory, and the metamorphosis rate of indoor seedlings is low. The emergence of artificial seedlings of snails is low and the cost is high. Therefore, It is necessary to further optimize the conditions for raising snail seedlings to improve the success rate of snail seedlings and meet market demand

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