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Method for cultivating re-shell blue crabs indoors

A technology of mud crab and molting, applied in fish farming, application, climate change adaptation, etc., can solve problems such as limiting the production of heavy shell crab, and achieve the effects of low cost, high complete rate of appendages, and high quality.

Inactive Publication Date: 2012-01-25
GUANGDONG OCEAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This greatly limits the production of heavy-shell crabs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0010] (1) A cement pool is built indoors, the pool is 3.8 meters long, the outer wall of the pool is 80 cm high (the base is 25 cm, the pool depth is 55 cm), the width is 1 meter, and the water depth is 30 cm. The cement pool is equipped with a water inlet and a drain outlet at the bottom of the pool.

[0011] (2) The plastic mesh cage is made of water-submersible plastic casting and consists of a base and a cover. The plastic mesh cage base is 21.5 cm long, 15.5 cm wide and 35 cm high. The net cage is covered to prevent crabs from escaping. The cover is tied to the base with a string. The mesh size is 1 cm in diameter. Cover with large mesh holes, 2 cm in diameter, to facilitate observation of crab molting and survival.

[0012] (3) The plastic mesh cages are divided into four rows, neatly placed in the cement pool, and 80 mesh cages are placed in each pool. The bottom of the pool is inflated to ensure the dissolved oxygen concentration.

[0013] (4) The pH is 7.5-8.5,...

Embodiment 2

[0017] (1) A glass pool is built indoors, the pool is 3.8 meters long, the outer wall of the pool is 80 cm high (the base is 25 cm, the pool depth is 55 cm), the width is 1 meter, and the water depth is 30 cm. The cement pool is equipped with a water inlet and a drain outlet at the bottom of the pool.

[0018] (2) The plastic mesh cage is made of water-submersible plastic casting and consists of a base and a cover. The plastic mesh cage base is 21.5 cm long, 15.5 cm wide and 35 cm high. The net cage is covered to prevent crabs from escaping. The cover is tied to the base with a string. The mesh size is 1 cm in diameter. Cover with large mesh holes, 2 cm in diameter, to facilitate observation of crab molting and survival.

[0019] (3) The plastic mesh cages are divided into four rows, neatly placed in the glass pool, and 80 mesh cages are placed in each pool. The bottom of the pool is inflated to ensure the dissolved oxygen concentration.

[0020] (4) The pH is 7.6-8.8, a...

Embodiment 3

[0024] (1) Indoor glass fiber reinforced plastic bucket, 1.9 meters long, 50 cm high, 1 meter wide, and 30 cm deep. Stainless steel base under the barrel, stainless steel base is 25 cm high. The two barrels are connected end to end, lined up in a row, with pedestrian walkways on both sides.

[0025] (2) The plastic mesh cage is made of water-submersible plastic casting and consists of a base and a cover. The plastic mesh cage base is 21.5 cm long, 15.5 cm wide and 35 cm high. The net cage is covered to prevent crabs from escaping. The cover is tied to the base with a string. The mesh size is 1 cm in diameter. Cover with large mesh holes, 2 cm in diameter, to facilitate observation of crab molting and survival.

[0026] (3) The plastic mesh cages are divided into four rows, neatly placed in glass fiber reinforced plastic buckets, and 40 mesh cages are placed in each bucket. The bottom of the barrel is inflated with air stone to ensure the concentration of dissolved oxygen...

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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...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 廖永岩
Owner GUANGDONG OCEAN UNIVERSITY
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