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Method using hard shell crabs to cultivate soft shell crabs

A soft-shell crab and molting technology, applied in the field of aquaculture, can solve the problems of high breeding cost, need to feed bait, reduce the production profit of soft-shell crabs, etc., and achieve the effect of short cultivation time and stable water environment.

Inactive Publication Date: 2010-07-07
GUANGDONG OCEAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The production of soft shell crabs with non-heavy shell crabs requires baiting, and the breeding time is long (usually at least one month), resulting in high breeding costs and reducing the profit of soft shell crab production

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0009] (1) The soft-shell crab breeding pond is an indoor cement pond, 3.8 meters long, 80 centimeters high on the outer wall of the pond (base 25 centimeters, pond depth 55 centimeters), 1 meter wide, and 30 centimeters deep. The cement pool is equipped with a water filling pipe mouth, and the bottom of the pool is equipped with a drain pipe mouth. The plastic mesh cage is cast from submersible plastic and consists of two parts, the base and the 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 of the mesh cage 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.

[0010] (2) 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 th...

Embodiment 2

[0016] (1) The soft-shell crab breeding pond is an indoor cement pond, 3.8 meters long, 80 centimeters high on the outer wall of the pond (base 25 centimeters, pond depth 55 centimeters), 1 meter wide, and 30 centimeters deep. The cement pool is equipped with a water filling pipe mouth, and the bottom of the pool is equipped with a drain pipe mouth. The plastic mesh cage is cast from submersible plastic and consists of two parts, the base and the 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 of the mesh cage 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.

[0017] (2) 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 th...

Embodiment 3

[0023] (1) The soft-shell crab cultivation pond is an indoor glass-steel 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. The plastic mesh cage is cast from submersible plastic and consists of two parts, the base and the 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 of the mesh cage 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.

[0024] (2) The plastic mesh cages are divided into four rows, neatly placed in the cement pool, and 40 mesh cages are placed in each bucket. The bott...

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Abstract

The invention discloses a method using hard shell crabs to cultivate soft shell crabs, comprising the following steps: more than 50 grams of hard shell crabs are obtained as molting crabs for cultivation from natural waters or crab culture ponds; the living hard shell crabs are transported to a molting pond in the shortest time to be singly cultivated in mesh cages or perforated plastic boxes; according to the difference of the crabs for cultivation, when the hard shell crabs are used for cultivating the soft shell crabs, the pH is 7.0-8.8, and dissolved oxygen is more than 5mg / L; the salinity is 15-35, and the temperature is 18-32 DEG C, so that the crabs are in the best molting environment. The molting rate is increased, and the mortality rate is reduced. The molting or death condition of the crabs is checked once every 2-4 hours, and the dead crabs are taken out and then are disposed. The soft shell crabs are moved out for temporary storage of living out of water, or low-temperature living temporary storage, or deep freezing storage to be sold. The method has the advantages of short molting cultivating time, no feeding and stable water environment, and basically does not change the water.

Description

technical field [0001] The invention belongs to the field of aquaculture, and in particular relates to a method for cultivating soft-shell crabs with heavy-shell crabs. Background technique [0002] Crab is an important fresh 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. After the hard shells are shed and the soft shells are not hardened, they are processed to keep the soft shells and sold to customers for consumption. Since crabs do not ingest food when moulting, they must also discharge all the feces in their intestines. This makes there is almost no feces in the crab body, and the shell, 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. [0003] Heavy-shell crabs refer to crabs that will moult (within 1 to 10 days in the...

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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