Method for producing soft-shell crabs by using portunus trituberculatus crabs

A technology of Portunus trituberculatus and soft-shell crabs, which is applied in the fields of application, fish farming, climate change adaptation, etc., can solve the problems of inconvenience, reduction of edible parts of crabs, etc., and achieve the effect of cultivating abundant crab species

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

[0002] Crab is an important fresh seafood, but because crab has a hard shell,

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 a drain pipe mouth below.

[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 concentration of dissolved oxygen.

[002...

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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PUM

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Abstract

The invention relates to a method for producing soft-shell crabs by using portunus trituberculatus crabs. The method comprises the following steps of: taking 50-250g of portunus trituberculatus crabs as molting crab seedlings which do not finish reproductive molting from a natural sea area or a portunus trituberculatus crab culturing pool, conveying living bodies of the molting crab seedlings to a molting pool and culturing, and strictly preventing sudden changes of temperature and salinity, wherein the pH value of a soft-shell crab culturing pool is 7.0-8.8, the dissolved oxygen is more than 5mg/L, the salinity is 20-35, and the temperature is 18-30 DEG C; casting baits according to 5-10 percent of crab weight at nightfall or in the early morning everyday; checking the molting or death situation of the crabs every 2-4h, taking dead crabs out and putting away; moving the soft-shell crabs away; and quickly freezing and storing the living bodies, or storing the living bodies at low temperature for sale. The portunus trituberculatus crabs are the ocean crabs which have largest culturing scale in the world, and the species of the soft-shell culturing crabs are most plentiful. The individual of the portunus trituberculatus crabs is larger than that of the North American blue crabs and portunus pelagicus and is most suitable for culturing high-quality soft-shell crabs.

Description

technical field [0001] The invention belongs to the field of aquaculture, and in particular relates to a method for producing soft-shell crabs with portunus trituberculatus. Background technique [0002] Crab is an important raw seafood, but, because crab has a hard shell, 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. When the hard shell is shed and the soft shell has not hardened, it is processed to keep it in a soft shell state, and sold to customers for consumption. Because when the crab moults, it does not ingest, and all the food it ingested before is discharged, which makes the crab almost have no feces. Moreover, the shell, gills and other parts are soft and can be eaten. This not only reduces the trouble of shelling when eating crabs, but also greatly increases the edible part of crabs. [0003] At present, North American blue crabs, portunus and blue crabs are mainly...

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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