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Soft-shell green crab cultivating method

A cultivation method and technology for soft-shell mud crabs, applied in the field of soft-shell mud crab cultivation, can solve the problems of high labor intensity, limited cultivation scale, inability to meet the soft-shell crab market, etc. Effect

Inactive Publication Date: 2017-06-09
姜蕾
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Indoor production of soft-shell mud crabs requires high cultivation costs, and the scale of cultivation is limited by the scale of indoor facilities, which is far from meeting the needs of the soft-shell crab market
Carrying out soft-shell crab cultivation with floating rafts in the wild, although the cultivation cost is low and the scale is large, must be checked once in every 2-4 hours in the whole culture pond to see if the cultivation crab has cast off its shell, and it must be checked more than 10 times in 24 hours a day to make the soft-shell crab more stable. Crab breeders have a heavy workload and high labor intensity

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0011] (1) The floating rafts are arranged along the length of the pond, and the length is half the length of the pond. The floating raft is composed of polyvinyl chloride (PVC) pipes with a diameter of 4 cm. A floating raft is generally connected by multiple 4-meter-long PVC pipes, 5 in each row, forming 4 rows of boxes for crab boxes (the width is just a glance Past vision). Cover both ends of the PVC pipe with PVC caps to prevent water from entering. The length of the raft depends on the length of the pond. The floating raft is divided into small units of 110X110 cm each, which are tied and connected by a narrow wood (2.5 cm wide X 2.0 cm thick X 110 cm long), or a small polyvinyl chloride pipe with a smaller diameter than the main pipe instead of wood. The wood or small pipe is tied horizontally to the main pipe. Each section (section) separated by wood can hold 6 rows of crab boxes, that is, 6 boxes in each row and 24 boxes in 4 rows.

[0012] (2) In the width direction ...

Embodiment 2

[0023] (1) The floating rafts are arranged along the length of the pond, and the length is half the length of the pond. The floating raft is composed of polyvinyl chloride (PVC) pipes with a diameter of 4 cm. A floating raft is generally connected by multiple 4-meter-long PVC pipes, 5 in each row, forming 4 rows of boxes for crab boxes (the width is just a glance Past vision). Cover both ends of the PVC pipe with PVC caps to prevent water from entering. The length of the raft depends on the length of the pond. The floating raft is divided into small units of 110X110 cm each, which are tied and connected by a narrow wood (2.5 cm wide X 2.0 cm thick X 110 cm long), or a small polyvinyl chloride pipe with a smaller diameter than the main pipe instead of wood. The wood or small pipe is tied horizontally to the main pipe. Each section (section) separated by wood can hold 6 rows of crab boxes, that is, 6 boxes in each row and 24 boxes in 4 rows.

[0024] (2) In the width direction ...

Embodiment 3

[0036] (1) The floating rafts are arranged along the length of the pond, and the length is half the length of the pond. The floating raft is composed of polyvinyl chloride (PVC) pipes with a diameter of 4 cm. A floating raft is generally connected by multiple 4-meter-long PVC pipes, 5 in each row, forming 4 rows of boxes for crab boxes (the width is just a glance Past vision). Cover both ends of the PVC pipe with PVC caps to prevent water from entering. The length of the raft depends on the length of the pond. The floating raft is divided into small units of 110X110 cm each, which are tied and connected by a narrow wood (2.5 cm wide X 2.0 cm thick X 110 cm long), or a small polyvinyl chloride pipe with a smaller diameter than the main pipe instead of wood. The wood or small pipe is tied horizontally to the main pipe. Each section (section) separated by wood can hold 6 rows of crab boxes, that is, 6 boxes in each row and 24 boxes in 4 rows.

[0037] (2) In the width direction ...

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Abstract

The invention relates to a soft-shell green crab cultivating method. The method includes the steps that green crabs which weigh 50-250 g and are not pubescent yet are obtained from natural sea area or a crab cultivating pond to serve as moulting juvenile crabs; the juvenile crabs are cultivated into heavy shell crabs in a field buoyant raft cultivation pond or indoor cultivation pond; the heavy shell crabs are transferred into the indoor cultivation pond in time to be cultivated into soft shell crabs. In the heavy shell crab and soft shell crab cultivation stage, the pH value is 7.0-8.8, dissolved oxygen is 5 mg / L or above, the salinity is 15-35, and the temperature is 18-32 DEG C. during heavy shell cultivation, the heavy shell or death condition of the crabs are checked once at the interval of 2-3 days, the heavy shell crabs are transferred to the soft shell crab cultivation pond to be cultivated in time, and the moulting or death condition of the crabs are checked once at the interval of 2-4 hours, and the soft shell crabs are transferred out for sale.

Description

Technical field [0001] The invention belongs to the field of aquaculture, and specifically relates to a method for cultivating soft-shell mud crabs. Background technique [0002] Crab is an important fresh seafood. However, due to its hard shell, it is very inconvenient to eat, and the edible part of the crab is greatly reduced. Soft shell crabs use the normal physiology of crabs to molt. After the hard shell is shed, when the soft shell has not hardened, it is processed to keep it in the soft shell state and sold to customers for consumption. Since the crab does not eat when it molts its shell, all the food it has eaten before must be expelled. This makes the crabs have almost no feces, 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. Now, in the world, the United States uses North American blue crabs to produce soft-shell crabs; Australia uses breeding barrel...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/59
CPCY02A40/81
Inventor 姜蕾
Owner 姜蕾
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