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Method for improving culture survival rate of river crabs by using climbing device

A survival rate and river crab technology, which is applied in the field of improving the survival rate of river crab breeding, can solve the problems of waste labor, waste water and weed removal, dead crabs, etc., and achieve the effect of improving survival rate, reducing cost and labor intensity, and preventing death due to hypoxia

Inactive Publication Date: 2012-05-23
FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above method does have a good effect on preventing the river crabs from hypoxia and disease when the aquatic plants grow wildly, but the cut aquatic plants and the artificially opened passages will be covered by the aquatic plants soon, and the removal of the aquatic plants will waste time and work. dead crabs

Method used

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  • Method for improving culture survival rate of river crabs by using climbing device
  • Method for improving culture survival rate of river crabs by using climbing device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The present invention uses a climbing device to improve the survival rate of river crab breeding. The process steps adopted are as follows:

[0019] 1. Clean the pond with 120 kg quicklime per acre of water surface. After a week, use 60 mesh sieve to filter and inject water at a depth of 20 cm. Then transplant Elodea. The spacing between each hole of water plants is 1 meter, and the coverage rate of water plants is 60. %. With the growth of aquatic plants, the water level is gradually increased, and when the water level reaches 1 meter, a climbing device constructed of mesh sheets will be constructed.

[0020] Climbing device construction: Purchase a PVC mesh with a mesh of 1.0 cm, and cut the mesh into a strip of 10 meters long and 1.5 meters wide. Hang the mesh vertically in the pond and fix it with bamboo stakes every 3 meters. The diameter of the bamboo stakes is 3.0 cm and the height is 2.0 meters.

[0021] Set density: open a 2m wide channel every 10m in the aquatic gr...

Embodiment 2

[0024] The present invention uses a climbing device to improve the survival rate of river crab breeding. The process steps adopted are as follows:

[0025] 1. Clean the pond with 120 kg quicklime per acre of water surface. After a week, use 60 mesh sieve to filter and inject water at a depth of 20 cm. Then transplant Elodea. The spacing between each hole of water plants is 1 meter, and the coverage rate of water plants is 60. %. With the growth of aquatic plants, the water level is gradually increased, and when the water level reaches 1 meter, a climbing device constructed of mesh sheets will be constructed.

[0026] Climbing device construction: Purchase a 0.8 cm PVC mesh, and cut the mesh into a long strip of 20 meters long and 1.5 meters wide. Hang the mesh vertically in the pond and fix it with bamboo stakes every 3 meters. The diameter of the bamboo stakes is 2.5 cm and the height is 1.8 meters.

[0027] Set density: open a 3-meter-wide channel every 8 meters in the aquatic gr...

Embodiment 3

[0030] The present invention uses a climbing device to improve the survival rate of river crab breeding. The process steps adopted are as follows:

[0031] 1. Clean the pond with 120 kg quicklime per acre of water surface. After a week, use 60 mesh sieve to filter and inject water at a depth of 20 cm. Then transplant Elodea. The spacing between each hole of water plants is 1 meter, and the coverage rate of water plants is 60. %. With the growth of aquatic plants, the water level is gradually increased, and when the water level reaches 1 meter, a climbing device constructed of mesh sheets will be constructed.

[0032] Climbing device construction: Purchase a 1.2 cm polyvinyl chloride mesh, and cut the mesh into a long strip of 15 meters long and 1.8 meters wide. Hang the mesh vertically in the pond and fix it with bamboo stakes every 4 meters. The diameter of the bamboo stakes is 3.5 cm and the height is 2.0 meters.

[0033] Density setting: Open a 3-meter-wide channel every 15 mete...

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Abstract

The invention relates to a method for improving culture survival rate of river crabs by using a climbing device, in particular to a method for improving the raising survival rate of river crabs in a pond or other water areas. The method comprises three steps of constructing the climbing device, setting density for net sheets and hanging the net sheets. When water plants excessively grow, the river crabs can climb out of the water surface, so death of the river crabs due to oxygen deficit is prevented. The method can provide a climbing shelter for shelling of the river crabs, prevent the river crabs from being killed by the same species, prevent the water plants from covering the passage and ensure up-and-down convection of the water body, is favorable for improving the oxygen dissolution condition of the water bottom, and can reduce the cost and labor intensity of frequently clearing the water plants. By adopting the technology, the method is favorable for improving the culture survival rate, yield and benefit of the river crabs.

Description

Technical field [0001] The invention relates to a method for improving the survival rate of river crabs by using a climbing device, in particular to a method for improving the survival rate of river crabs during the breeding process of river crabs in ponds or other waters. Background technique [0002] The scientific name of the river crab is Eriocheir Sinensis H.Milne Edwards, and it is one of the high-quality aquatic economic species in my country. Since the 1980s, my country has carried out artificial breeding of river crabs, and now an industrialized production system has been formed. With the expansion of aquaculture scale, river crab aquaculture has formed a variety of models such as pond farming, paddy farming, fence farming, river farming and reservoir farming. The types of farming can be divided into ecological farming, intensive farming and extensive farming. Regardless of the breeding mode or type, the survival rate of river crab breeding is always an important indica...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 徐跑周鑫赵朝阳徐增洪水燕
Owner FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI
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