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Seedling desalinating and stocking method for fresh water aquiculture of mud crab

A technology for freshwater aquaculture and scylla The effect of improving and improving the survival rate and reducing the production cost

Inactive Publication Date: 2008-07-16
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

In recent years, domestic farmers have tried low-salinity farming methods, but the salinity is mostly above 10, and pure freshwater farming of mud crabs has not been reported so far
Since the sea crab seedlings are stocked without desalination technology, the crab seedlings can be directly put into the pond for breeding, so the breeding method is relatively simple, but the disadvantage of this farming method is that it is easily infected by pathogens in seawater, and the survival rate of crab seedlings is relatively low. Low, not conducive to the improvement of breeding production and benefits

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Embodiment 1: the seed desalination and stocking method of a kind of mud crab freshwater cultivation of the present invention, adopt following process step: it mainly comprises crab seedling temporarily raise pond preparation, crab seedling raises temporarily, crab seedling desalination and crab seedling cultivation four Big step:

[0030] 1. Preparation of the temporary breeding pond for crab seedlings: Excavate a temporary breeding pond with a depth of 1.5 meters, a width of 10 meters and an area of ​​100-500 square meters in the main breeding pond of Scylla serrata. The surroundings are built into a pool ridge, which is 40 cm high and 50 cm wide, and it is compacted. Quicklime is used for disinfection, and the amount used per mu of crab ponds is 90 kg; a 40 cm high escape fence is set on the pool ridge, and the fence material can be plastic film, aluminum foil or glass steel tile. Before stocking crab seedlings, put glass fiber reinforced plastic tiles on the bottom...

Embodiment 2

[0031] Embodiment two: the present invention is a kind of seed desalination and put in a suitable place to breed method of Scylla serrata freshwater cultivation, adopts following process step:

[0032] 1. Preparation of the temporary breeding pond for crab seedlings: Excavate a temporary breeding pond with a depth of 2.0 meters, a width of 20 meters and an area of ​​100-500 square meters in the main breeding pond of Scylla serrata. The surroundings are built into a pool ridge, which is 50 cm high and 60 cm wide, and it is compacted. Quicklime is used for disinfection, and the amount used per mu of crab ponds is 100 kilograms; a 50-centimeter-high escape fence is set on the pond ridge, and the fence material is glass steel tiles. Before stocking the crab seedlings, put tubular plastic concealers on the bottom of the pool, and after 3 days of disinfection, inject 1.0 meters of fresh water into the holding pool, add concentrated seawater with a Baume degree of 10, adjust the sali...

Embodiment 3

[0033] Embodiment three: the present invention is a kind of seed desalination and put in a suitable place to breed method of a kind of Scylla serrata freshwater cultivation, adopts the following process steps: its formula ratio is counted by the number of parts:

[0034] 1. Preparation of the temporary breeding pond for crab seedlings: Excavate a temporary breeding pond with a depth of 2.0 meters, a width of 20 meters and an area of ​​100-500 square meters in the main breeding pond of Scylla serrata. The surroundings are built into a pool ridge, which is 30 cm high and 40 cm wide, and it is compacted. Quicklime is used for disinfection, and the amount of crab ponds per mu is 80 kilograms; after 7 days of disinfection, crab seedlings are stocked, and the stocking density of crab seedlings is 20 tails / m 3 . Before the crab seedlings are stocked, inject 0.6 meters of fresh water into the holding pond, and add 2 parts of magnesium sulfate, 1.44 parts of calcium chloride, 0.96 parts...

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Abstract

The invention relates to a fingerling desalination and stocking method for the scylla serrata freshwater culture, in particular to the seawater economic crab culturein freshwater, belonging to the aquaculture technical field. The invention is characterized in that the method comprises the following technique steps: preparing a temporary prawn larva culturing pond; cleaning up the temporary crab larva breeding pond; building anti-escaping facility; setting artificial hidden objects; sterilizing the pond; fertilizing; the pond affusion and salinity regulating; temporary crab larva breeding; crab larva sterilizing; crab larva stocking and breeding; crab larva desalting; crab larva low salinity transferring and desalting; crab larva cultivating; aquatic planting; the freshwater breeding of the crab larva. The invention can prevent the crab larva from dying caused by the sudden change of an osmotic pressure after directly entering the freshwater through the desalting process during the temporary breeding period of the crab larva; leading the scylla serrata to be able to grow from the seawater into the freshwater after artificial desalting and breeding, which is beneficial to reduce the incidence of the scylla serrata, improve the surviving rate of stocking and breeding of the crab larva and increase the culturing yield.

Description

technical field [0001] The invention relates to a seed desalination and stocking method for freshwater cultivation of mud crabs, in particular to raising seawater economic crabs in fresh water, and belongs to the technical field of aquaculture. Background technique [0002] Scylla serrata is one of the high-end seafood economic species in my country. In recent years, due to the aggravation of marine pollution, the incidence of marine aquaculture of Scylla serrata has remained high, resulting in huge economic losses. This situation is still difficult to change, and the development of freshwater aquaculture is to avoid pathogens in seawater. It is an effective method for crabs to cause harm. At the same time, moving seawater species to freshwater culture can not only provide new cultured species for freshwater culture, but also help to improve the breeding efficiency. Variety structure adjustment and new rural construction played a positive role. [0003] Scylla serrata main...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 周鑫徐仁义王进波
Owner FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI
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