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Culture method of river crab megalops larvae

A technique of macrophthalmia and cultivation method, which is applied in the field of cultivation of megalopa of the river crab, can solve the problems of low survival rate and unreasonable management, and achieve the effects of low precocious puberty rate, easy management and fast development.

Inactive Publication Date: 2018-04-13
无为县瑞康特种水产养殖有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the general megalopa is cultivated in ponds, which has defects such as unreasonable management and low survival rate.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] A method for culturing river crab megalopa proposed by the present invention comprises the following steps:

[0020] 1) Construction of nursery ponds: choose a place sheltered from wind and sunny and with sufficient water sources to build a cement pond, and the area of ​​a single cement pond is 400m2 2 , the depth of the pool is 1.2m, the slope is 1:2, an oxygenation pipeline is installed on the wall of the pool, and a shed is erected above the nursery pool;

[0021] 2) Planting of aquatic plants: Lay the sterilized fine sand layer, silt layer and gravel layer at the bottom of the nursery pond. 7-10 days before the big eye larvae are placed in the pond, transplant Duckweed and Elodea, and inject water to the water level 50-60cm, add decomposed manure to the nursery pond according to the dosage of 20kg / mu for water quality cultivation;

[0022] 3) Stocking of seedlings: in early May, choose the seedlings of bigeye larvae. The seedlings have neat specifications and stron...

Embodiment 2

[0027] A method for culturing river crab megalopa proposed by the present invention comprises the following steps:

[0028] 1) Construction of nursery ponds: choose a place sheltered from wind and sunny and with sufficient water sources to build a cement pond. The area of ​​a single cement pond is 420m2 2 , the depth of the pool is 1.3m, the slope is 1:2.5, an oxygenation pipeline is installed on the wall of the pool, and a shed is erected above the nursery pool;

[0029] 2) Planting of aquatic plants: Lay the disinfected fine sand layer, silt layer and sandstone layer at the bottom of the nursery pond. The thickness of the fine sand layer, silt layer and sandstone layer are 5cm: 7cm: 3cm respectively. 7-10 days before going down the pond, transplant Duckweed and Elodea, the planting ratio of Duckweed and Elleweed is 5:3, inject water to the water level of 50-60cm, and add 24kg / mu to the nursery pond. Decomposed manure for water quality cultivation;

[0030] 3) Stocking of s...

Embodiment 3

[0035] A method for culturing river crab megalopa proposed by the present invention comprises the following steps:

[0036] 1) Construction of nursery ponds: choose a place sheltered from wind and sun and with sufficient water sources to build a cement pond. The area of ​​a single cement pond is 460m2 2 , the depth of the pool is 1.4m, the slope is 1:2.5, an oxygenation pipeline is installed on the wall of the pool, and a shed is erected above the nursery pool;

[0037] 2) Planting of aquatic plants: Lay the sterilized fine sand layer, silt layer and sandstone layer at the bottom of the nursery pond. 7-10 days before going down the pond, transplant Duckweed and Elodea, the planting ratio of Duckweed and Elleweed is 6:3, inject water to a water level of 50-60cm, and add 27kg / mu to the nursery pond Decomposed manure for water quality cultivation;

[0038] 3) Stocking of seedlings: In early May, choose megalobatus seedlings, with a specification of 150,000 / kg. The seedlings are...

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Abstract

The invention discloses a culture method of river crab megalops larvae and relates to the technical field of crab breeding. The culture method comprises the following steps: constructing a nursery pond, planting aquatic plants, breeding parent fries outside cages, feeding baits, carrying out water quality management and carrying out greenhouse management. By adopting the method disclosed by the invention, the survival rate of the river crab megalops larvae can be improved; the megalops larvae have the advantages of rapid development, large size, high yield, low sexual precocity rate and easiness for management; and after the megalops larvae are cultured into phase-V juvenile crabs, the phase-V juvenile crabs can be transferred into a juvenile crab culture phase by ponds to be cultured, andthe culture method has very good culture popularization value.

Description

technical field [0001] The invention relates to the technical field of crab seedling breeding, in particular to a method for culturing megalobatids of river crabs. Background technique [0002] The scientific name of Chinese mitten crab is a precious freshwater product with delicious taste, rich nutrition and high economic value. River crab farming is generally divided into three stages: breeding, cultivation of crab seedlings and cultivation of commercial adult crabs. For the breeding of river crabs, professional breeding enterprises put river crabs in saltwater ponds along the coast for natural spawning in autumn. Flea-like larvae are hatched in the spring of the following year. Eye larvae, after one year of careful rearing in freshwater ponds, will develop button crab seedlings, which can be sold out of the pond after another year of careful rearing. [0003] In order to improve the survival rate of crabs and the efficiency of artificial breeding, it is the key to culti...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/59A23K20/105A23K50/80
CPCA01K61/59A23K20/105A23K50/80Y02A40/81
Inventor 刘志勇
Owner 无为县瑞康特种水产养殖有限公司
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