Method for manually breeding Charybdis feriatus seedlings in earth pond

Abstract

The invention relates to a method for manually breeding Charybdis feriatus seedlings in an earth pond and belongs to the technical field of seedling culture for aquaculture. The method comprises the following steps that incubated parent crabs subjected to intensive culture in a concrete pond are placed in an incubation basket which is prepared in the earth pond in advance, rotifers are fed at the same day of incubation, the water color of the earth pond is observed every day and the transparency of the earth pond is kept about 35 cm; after being developed to the third stage of zoea, copepods are fed to the earth pond, and the density of the copepods is kept at 5 per milliliter; during megalops period, fish and meat are fed to the earth pond according to 200% of the estimated larva weight until the larvae are developed to young cabs. During the seedling breeding period, the requirements on the water quality are that the salinity is reliably stable and is kept at 2-3%, the temperature is 26-29 DEG C, the pH is 7.8-8.6, the dissolved oxygen is more than 4 mg/L and the transparency is kept at 30-50 cm. According to the method, a technology for manually breeding the Charybdis feriatus seedlings in the earth pond is implemented, and the method is simple, quick and low in production cost, and provides a feasible way for scale production of the Charybdis feriatus.

Description

technical field [0001] The invention belongs to the technical field of seedling cultivation of aquaculture, and particularly relates to a method for raising seedlings in artificial soil ponds of C. rustii. Background technique [0002] Charybdis feriatus, commonly known as safflower crab, red crab, and cross crab, is one of the large seafood crabs in my country. The price has always been high, and the current market price in Hainan is as high as 80-200 yuan / kg. At present, most of the commercial crabs sold in the market rely on fishing in natural sea areas. With the development of the economy and the improvement of living standards, people's demand for rust-spotted crabs is also increasing. Due to the harvesting in the wild in recent years, the resources are becoming increasingly depleted. . Therefore, the success of the artificial earth pond seedling technology of C. russii can not only maintain the sustainable development of its resources through proliferation and release...

AI Technical Summary

Problems solved by technology

But this method is not to carry out seedling raising in earthen pond, namely the environment of raising seedlings is not the same as that of the present invention, so there are certain differences in the middle seedling raising process

For example, filter, disinfect, fertilize and water before raising seedlings in earthen ponds, adjust water quality according to weather conditions during the period, catch methods later, seedling emergence rate, etc. Different seedling site environments are destined to have different seedling methods, so the previously disclosed seedling raising methods cannot be compared with the patent of the present invention.