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Method for culturing soft-shell green crabs indoors by using cage

A net cage and mud crab technology, applied in the field of aquaculture, can solve the problems of reducing the survival rate of cultivation, increasing construction costs, and reducing the quality of soft-shell crabs, etc., achieving high survival rate of crabs, high rate of complete appendages, and low cultivation cost Effect

Inactive Publication Date: 2010-06-30
GUANGDONG OCEAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The current indoor production of soft-shell blue crabs in Zhejiang is cultivated in ponds or glass tanks. The pools or tanks are relatively large, and more than 2 blue crabs are cultivated in a small tank or tank. In the same pond or tank, molt crabs are often eaten or disabled by crabs that have not molted, reducing the survival rate of cultivation or reducing the quality of soft-shell crabs
Moreover, building too many small ponds or tanks increases construction costs

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] (1) Build a cement pool indoors, the length of the pool is 3.8 meters long, the outer wall of the pool is 80 cm high (base 25 cm, pool depth 55 cm), 1 meter wide, and water depth 30 cm. The cement pool is equipped with a water filling pipe port, and the pool bottom is equipped with a drain pipe port.

[0010] (2) The plastic net cage is made of submerged plastic and consists of two parts: a base and a cover. The base of the plastic net cage 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 rope. The mesh size is 1 cm in diameter. The lid has a large mesh hole with a diameter of 2 cm, which is convenient for observing the molting and survival of the crab.

[0011] (3) The plastic net cages are divided into four rows, neatly placed in the cement pool, 80 net cages are placed in each pool. The bottom of the pool is inflated to ensure the concentration of dissolved oxygen.

[0012] (4) T...

Embodiment 2

[0016] (1) A glass pool is built indoors, the length of the pool is 3.8 meters long, the outer wall of the pool is 80 cm high (base 25 cm, pool depth 55 cm), 1 meter wide, and water depth 30 cm. The cement pool is equipped with a water filling pipe port, and the pool bottom is equipped with a drain pipe port.

[0017] (2) The plastic net cage is made of submerged plastic and consists of two parts: a base and a cover. The base of the plastic net cage 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 rope. The mesh size is 1 cm in diameter. The lid has a large mesh hole with a diameter of 2 cm, which is convenient for observing the molting and survival of the crab.

[0018] (3) The plastic net cages are divided into four rows, neatly placed in the glass pool, 80 net cages are placed in each pool. The bottom of the pool is inflated to ensure the concentration of dissolved oxygen.

[0019] (4) ...

Embodiment 3

[0023] (1) Indoor glass fiber reinforced plastic barrel, length 1.9 meters, barrel height 50 cm, width 1 meter, water depth 30 cm. There is a stainless steel base under the barrel, and the stainless steel base is 25 cm high. The two barrels are connected end to end in a row, with pedestrian walkways on both sides.

[0024] (2) The plastic net cage is made of submerged plastic and consists of two parts: a base and a cover. The base of the plastic net cage 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 rope. The mesh size is 1 cm in diameter. The lid has a large mesh hole with a diameter of 2 cm, which is convenient for observing the molting and survival of the crab.

[0025] (3) The plastic net cages are divided into four rows, neatly placed in FRP buckets, each with 40 net cages. The bottom of the barrel is inflated with air stone to ensure the concentration of dissolved oxygen.

[0026...

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Abstract

The invention relates to a method for culturing soft-shell green crabs indoors by using a cage. The soft-shell green crabs are cultured by using a pool made from glass or cement or a rectangular plastic bucket or a glass-steel bucket, and water is injected in the pool, bucket or cylinder to reach 30cm. The method comprises the following steps of: catching 50-250g of green crabs which do not finish reproductive molting from a culturing pool or in the field as molting crab seedlings, conveying living bodies of the molting crab seedlings to a molting pool and culturing, respectively putting each crab in a capped plastic cage with 21.5cm length, 15.5cm width and 35cm height or a plastic tank with holes, and then putting the plastic tank with holes or the plastic cage into a culturing pool and culturing, wherein the temperature of 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 more than 5mg / L; casting baits according to 5-10 percent of crab weight at nightfall or in the early morning everyday; and checking the molting or death situation of the crabs every 2-4h, moving the soft-shell crabs away, temporarily storing the living bodies in low-temperature water body, or quickly freezing and storing the living bodies for sale. The invention has the advantages of mutual green crab killing prevention, high crab survival rate, low soft-shell crab culturing cost, high appendage completion ratio of crabs and high soft-shell crab quality.

Description

Technical field [0001] The invention belongs to the field of aquaculture, and specifically relates to a method for cultivating soft-shell mud crabs in a net cage room. Background technique [0002] Crab is an important fresh seafood. However, due to the hard shell of crab, it is very inconvenient to eat, and the edible part of crab is greatly reduced. Soft shell crabs use the normal physiological molting of crabs. After the hard shell is molted, the soft shell is not hardened. It is processed to keep it in the soft shell state and sold to customers for consumption. When a crab molts, it does not ingest food and must expel all the food it had previously ingested. This makes the crabs have almost no feces, and the shells, gills and other parts are soft and edible. This not only reduces the trouble of shelling when eating crabs, but also greatly increases the edible part of crabs. Now, in the world, the United States uses North American blue crabs to produce soft-shell crabs (Cha...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 廖永岩
Owner GUANGDONG OCEAN UNIVERSITY
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