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Method for breeding soft-shell blue crabs

A cultivation method and technology of soft-shell mud crabs, which are applied in the field of cultivation of soft-shell mud crabs, can solve the problems of limited cultivation scale, high labor intensity, and high cultivation costs, and reduce cultivation environmental pollution, labor intensity, and inspection times Effect

Inactive Publication Date: 2011-09-07
GUANGDONG OCEAN UNIVERSITY
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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, it is necessary to check whether the cultivation crab has cast off its shell every 2-4 hours in the whole culture pond, and it is necessary to check more than 10 times in 24 hours a day to make the soft-shell crab 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

[0009] (1) The floating rafts are arranged along the length direction of the pond, and the length is half of 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 to each other by multiple 4-meter-long PVC pipes, with 5 in each row, forming 4 rows of box fences for crab boxes (the width is just enough to see at a glance). past vision). Both ends of the PVC pipe are covered with PVC caps to prevent water from entering. The raft length depends on the length of the pond. The floating raft is divided into small units of 110 x 110 cm each, which are bound and connected by a narrow piece of wood (2.5 cm wide x 2.0 cm thick x 110 cm long), or the wood is replaced by a small polyvinyl chloride pipe with a smaller diameter than the main pipe. A piece of wood or a small tube is tied horizontally to the main tube. Each part (section) separated by wood can accommodate 6 crab boxes arranged...

Embodiment 2

[0020] (1) The floating rafts are arranged along the length direction of the pond, and the length is half of 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 to each other by multiple 4-meter-long PVC pipes, with 5 in each row, forming 4 rows of box fences for crab boxes (the width is just enough to see at a glance). past vision). Both ends of the PVC pipe are covered with PVC caps to prevent water from entering. The raft length depends on the length of the pond. The floating raft is divided into small units of 110 x 110 cm each, which are bound and connected by a narrow piece of wood (2.5 cm wide x 2.0 cm thick x 110 cm long), or the wood is replaced by a small polyvinyl chloride pipe with a smaller diameter than the main pipe. A piece of wood or a small tube is tied horizontally to the main tube. Each part (section) separated by wood can accommodate 6 crab boxes arranged...

Embodiment 3

[0032] (1) The floating rafts are arranged along the length direction of the pond, and the length is half of 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 to each other by a plurality of 4-meter-long PVC pipes, with 5 in each row, forming 4 columns of boxes for crab boxes (the width is just enough to see at a glance). past vision). Both ends of the PVC pipe are covered with PVC caps to prevent water from entering. The raft length depends on the length of the pond. The floating raft is divided into small units of 110 x 110 cm each, connected by a narrow piece of wood (2.5 cm wide x 2.0 cm thick x 110 cm long), or the wood is replaced by a small polyvinyl chloride pipe with a smaller diameter than the main pipe. A piece of wood or a small tube is tied horizontally to the main tube. Each part (section) separated by wood can accommodate 6 crab boxes arranged, that is, 6 box...

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Abstract

The invention discloses a method for breeding soft-shell blue crabs. 50 to 250g of blue crabs which are not sexually mature from a natural sea area or crab culture pond are taken as unshelled crabs, and the method comprises the following steps of: breeding the crabs into heavy shell crabs in a filed buoyant raft culture pond or an indoor culture pond; and timely transporting the heavy shell crabsinto the indoor culture pond, and breeding into soft-shell crabs. At the stages of breeding the heavy shell crabs and the soft-shell crabs, the pH is between 7.0 and 8.8, the dissolved oxygen is over5mg / L, the salinity is between 15 and 35, and the temperature is between 18 and 32 DEG C. During breeding the heavy shell crabs, the heavy shell or death condition of the crabs is checked every 2 to 3 days, the heavy shell crabs are timely transported into a soft-shell crab culture pond for breeding, the unshelled or death condition of the crabs is checked every 2 to 4 hours, and the soft-shell crabs are removed for sale.

Description

technical field [0001] The invention belongs to the field of aquaculture, and in particular relates to a method for cultivating soft-shell mud crabs. 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 crabs do not ingest when moulting, they must also discharge all the food they ingested before. 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 portion. Now, in the world, the United States uses North American blue crabs to produce soft-shell crabs; Australia uses...

Claims

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Application Information

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