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Method for cultivating blue crabs with heavy shells on floating rafts

A technology for floating rafts and crabs, which is applied in the field of breeding heavy-shelled blue crabs on floating rafts, can solve the problems of limiting the output of heavy-shelled crabs, and achieve the effects of low cost, high efficiency and large scale

Inactive Publication Date: 2012-02-29
GUANGDONG OCEAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This greatly limits the production of heavy-shell crabs

Method used

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  • Method for cultivating blue crabs with heavy shells on floating rafts
  • Method for cultivating blue crabs with heavy shells on floating rafts
  • Method for cultivating blue crabs with heavy shells on floating rafts

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] (1) floating rafts 18 are arranged along the length direction of the pond, and the length is half of the length of the pond. Floating raft 18 is made of the polyvinyl chloride (PVC) pipe 6 of diameter 4 centimeters, and a floating raft 18 is generally connected with each other by a plurality of 4 meters long PVC pipes 6, and every row is 5, forms 4 row and puts the box fence of crab box 5 (the width is just as far as the field of view at a glance). PVC pipe 6 road two ends cover PVC cap 4, to prevent water from entering. The length of the floating raft 18 depends on the length of the pond. The floating raft 18 is divided into small units of 110 x 110 cm each, 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 accom...

Embodiment 2

[0028] (1) floating rafts 18 are arranged along the length direction of the pond, and the length is half of the length of the pond. Floating raft 18 is made of polyvinyl chloride (PVC) pipe 6 with a diameter of 6 centimeters, and a floating raft 18 is generally connected to each other by a plurality of 4-meter-long PVC pipes 6, with 5 in every row, forming 4 rows of enclosures for placing crab boxes 5 (the width is just as far as the field of view at a glance). The two ends of the PVC pipe 6 cover the PVC pipe cap 4 to prevent water from entering. The length of the floating raft 18 depends on the length of the pond. The floating raft 18 is divided into small units of 110 x 110 cm each, 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) separat...

Embodiment 3

[0035] (1) floating rafts 18 are arranged along the length direction of the pond, and the length is half of the length of the pond. Floating raft 18 is made of the polyvinyl chloride (PVC) pipe 6 of diameter 7 centimeters, and a floating raft 18 is generally connected with each other by a plurality of 4 meters long PVC pipes 6, and every row is 5, forms 4 row and puts the box fence of crab box 5 (the width is just as far as the field of view at a glance). PVC pipe 6 two ends cover PVC cap 4, to prevent water from entering. The length of the floating raft 18 depends on the length of the pond. The floating raft 18 is divided into small units of 110 x 110 cm each, 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 accommodat...

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Abstract

The invention relates to a method for cultivating blue crabs with heavy shells on floating rafts, comprising the following steps of: building the floating rafts 18 on larger or deeper water surface, placing meshed cages 5 or boxes 5 with holes on the floating rafts 18, wherein the meshed cages 5 or the boxes 5 with holes are respectively filled with single crabs; building a bridge 21 in the direction perpendicular to the floating rafts 18; installing an aerating device and a deflating device and a heavy 11 for balance weight on PVC pipes of the floating rafts 18; and then cultivating the crabs with the heavy shells. The invention has the advantages of high efficiency, large scale and low cost, can prevent the crabs from killing each other and reduce the risk of cultivation losses of the crabs with the heavy shells due to storms.

Description

technical field [0001] The invention belongs to the field of aquaculture, and relates to a method for cultivating heavy-shell blue crabs on floating rafts. Background technique [0002] Crab is a typical representative of raw seafood. Heavy-shell crabs are crabs whose new shells have formed but the old shells have not yet been cast off. Although all kinds of crabs have heavy-shell crabs, general heavy-shell crabs mainly refer to the heavy-shell crabs of blue crabs (other types of heavy-shell crabs have little economic value because they are not resistant to storage and transportation). Since the old shell is about to slough off, the old shell is not as hard as before after decalcification, so it is easy to remove. After removing the old shell, heavy shell crabs are not much related to soft shell crabs and have similar advantages to soft shell crabs. However, the survival time of heavy-shell crabs out of water is much longer than that of soft-shell crabs after molting, whi...

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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