Method for cultivating re-shell blue crabs indoors

Abstract

The invention relates to a method for cultivating re-shell blue crabs indoors. A glass pool or cement pool is built by glass or cement, or a rectangular plastic bucket or a glass fiber reinforced plastic bucket is used for cultivating re-shell crabs, and water of 30cm high is filled into the pool or the bucket. The method of the invention comprises the following steps: catching blue crabs which are 50-250g and do not finish reproductive molting from a cultivating pool or the field as molting juvenile crabs; transporting living bodies of the molting juvenile crabs to a molting pool or bucket for cultivating; putting each crab respectively into a capped plastic mesh cage which is 21.5cm long, 15.5cm wide and 35cm high, or into a perforated plastic box; then putting the perforated plastic box or the plastic mesh cage into the cultivating pool or bucket for cultivating, wherein the temperature of the pool water is 20-32 DEG C, the salinity is 15-30, the pH value is 7.5-8.8, and the dissolved oxygen is greater than 5mg / L; feeding once with feed which is 5-10% of the body weight of the crab every 2 days in nightfall or in the morning; checking the re-shell or death conditions of the crabs once every 2-4 days; and taking the re-shell crabs out and storing the living body of the re-shell crabs for sale. The invention has the advantages of high cultivation efficiency of re-shell crabs, prevention of killing each other of the blue crabs, high survival rate of crabs, low cultivating cost of the re-shell crabs, high completeness rate of the appendages of the crabs, and high quality of the re-shell crabs.

Description

technical field

[0001] The invention belongs to the field of aquaculture, and in particular relates to a method for indoor cultivation of mud crabs. Background technique

[0002] Crab is a typical representative of raw seafood. Heavy-shelled crabs are crabs that are about to molt and whose new shells have been formed but the old shells have not yet shed. Although all kinds of crabs have heavy-shell crabs, the general heavy-shell crabs mainly refer to the heavy-shell crabs of blue crabs (other types of heavy-shell crabs have little economic value because they are not resistant to storage and transportation). Since the old shell is about to slough off, the old shell has been decalcified and is not as hard as before, which is easy to remove. After removing the old shells, heavy-shell crabs are not much related to soft-shell crabs and have similar advantages to soft-shell crabs. However, the survival time of heavy-shell crabs out of water is much longer than that of soft-shel...