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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 and other directions, can solve the problems of intolerant storage and transportation, low economic value, etc., and achieves a high rate of complete appendages and a high survival rate of crabs. , the effect of low cost

Inactive Publication Date: 2010-09-22
GUANGDONG OCEAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

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)

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 filling pipe mouth, and the bottom of the pool is equipped with a drain pipe mouth.

[0011] (2) The plastic mesh cage is cast from submersible plastic and consists of a base and a cover. The base of the plastic mesh cage is 21.5 cm long, 15.5 cm wide, and 35 cm high. Cover the net cage to prevent crabs from escaping. The cover is attached to the base with a string. The mesh size is 1 cm in diameter. The hole on the cover is relatively large, with a diameter of 2 cm, which is convenient for observing the moulting and survival of crabs.

[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 co...

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 filling pipe mouth, and the bottom of the pool is equipped with a drain pipe mouth.

[0018] (2) The plastic mesh cage is cast from submersible plastic and consists of a base and a cover. The base of the plastic mesh cage is 21.5 cm long, 15.5 cm wide, and 35 cm high. Cover the net cage to prevent crabs from escaping. The cover is attached to the base with a string. The mesh size is 1 cm in diameter. The hole on the cover is relatively large, with a diameter of 2 cm, which is convenient for observing the moulting and survival of crabs.

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

Embodiment 3

[0024] (1) Indoor fiberglass barrel, 1.9 meters long, 50 centimeters high, 1 meter wide, and 30 centimeters deep. The stainless steel base is placed under the barrel, and the height of the stainless steel base is 25 cm. The two barrels are connected end to end and lined up in a row, with walkways on both sides.

[0025] (2) The plastic mesh cage is cast from submersible plastic and consists of a base and a cover. The base of the plastic mesh cage is 21.5 cm long, 15.5 cm wide, and 35 cm high. Cover the net cage to prevent crabs from escaping. The cover is attached to the base with a string. The mesh size is 1 cm in diameter. The hole on the cover is relatively large, with a diameter of 2 cm, which is convenient for observing the moulting and survival of crabs.

[0026] (3) The plastic mesh cages are divided into four rows, neatly placed in fiberglass barrels, and 40 mesh cages are placed in each barrel. The bottom of the barrel is inflated with an air stone to ensure the...

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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 or a jar. 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 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 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 re-shell crabs without water 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 cultivating blue crabs with heavy shells. Background technique [0002] Crab is a typical representative of raw seafood. Heavy-shell crabs are crabs whose new shells have formed but the old shells have not yet been cast off. Although all kinds of crabs have heavy-shell crabs, 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 is not as hard as before after decalcification, so it is easy to remove. After removing the old shell, 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-shell crabs after mol...

Claims

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Application Information

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