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Method for culturing and transplanting Scylla fries stage by stage

A crab seedling and seedling transplanting technology is applied in the field of mud crab breeding to achieve the effects of reducing killing, increasing economic benefits and improving survival rate

Inactive Publication Date: 2013-03-27
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, farmers only stock young crabs, and have not yet accepted megalopa as crab seedlings. Therefore, it is necessary to improve the artificial breeding technology and improve the survival rate of seedlings according to the biological characteristics of blue crab megalopa and young crabs.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] 1. Cultivation in the stage of flea-like larvae. The volume of the zodiac larva cultivation pool is 30m 3 , the seedling density is 200,000 / m 3 . The water temperature is 24-27°C, and the salinity is 26‰-31‰. After 16 days of cultivation, they develop into the fifth stage zoa larvae, with a number of 1 million.

[0026] 2. Preparation of the megalopa breeding pool. 2 megalopa breeding ponds, each with an area of ​​120m 2 , the water temperature is 27°C, and the salinity is 24‰. Algae and Artemia nauplii are cultivated as bait.

[0027] 3. Pool moving time selection. The developmental stage of the larvae in the original pond is in the last day of the fifth stage zoan larvae, and will moult and metamorphose into megalopa the next day.

[0028] 4. Pool moving procedure:

[0029] (1) Before transplanting seedlings, the water level of the original pond is usually 1.5m. Adopt 80 order water-changing nets, use 3 siphon pipes with a diameter of 1 inch to quickly filter...

Embodiment 2

[0037] 1. Cultivation in the stage of flea-like larvae. The volume of the zodiac larva cultivation pool is 15m 3 , the seedling density is 250,000 / m 3 . The water temperature is 25-27°C, and the salinity is 26‰-31‰. After 16 days of cultivation, they develop into the fifth stage zoa larvae, with a number of 750,000. All of them are transferred to the megalopa breeding pool for further cultivation.

[0038] 2. Preparation of the megalopa breeding pool. 1 megalopa breeding pond with an area of ​​300m 2 , the water temperature is 28°C, and the salinity is 23‰. Cultivation of algae and Artemia nauplii.

[0039] 3. Selection of time for moving the pool. Few of the original pond larvae were macrophthalmia, and most of them were on the last day of the fifth stage of flea larvae.

[0040] 4. Operation procedure for moving the pool:

[0041] (1) Before transplanting the seedlings, the water level of the original pond was 1.3m. An 80-mesh water exchange net was used, and four sip...

Embodiment 3

[0049] 1. Cultivation of flea-like larval stage. The volume of the flea larvae breeding tank is 20m 3 , the density of seedlings is 150,000 pieces / m 3 . The water temperature was 25~27℃, and the salinity was 24‰~30‰. After 18 days, they were cultivated into macrophthalmia, and the number was 400,000. All of them were transferred to the macrophthalmia breeding tank for further cultivation.

[0050] 2. Preparation of the Larva culture tank. One big eye larvae breeding pond, with an area of ​​100m 2 , the water temperature is 27℃, and the salinity is 24‰. Breed algae and Artemia nauplii as bait.

[0051] 3. Time selection for transplanting seedlings. The developmental stage of the original pond larvae is in the last day of the fifth stage of flea-like larvae, and the next day will molt and metamorphose into macrophthalmia.

[0052] 4. The procedure of transplanting seedlings.

[0053] (1) Before transplanting seedlings, the water level of the original pond is usually 1.2m...

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Abstract

The invention provides a method for culturing and transplanting Scylla fries stage by stage, which relates to a Scylla culture method. The method comprises the following steps of: culturing zoeae in a culture pond for culturing for 12 to 18 days, and transferring the zoeae into a megalop culture pond with the area of 100 to 300 square meters for further culture; culturing live foods such as algae, fairy shrimps, copepods and the like in the megalop culture pond; transferring the fries at the last day of the fifth stage of the zoeae or at the first day of megalop, wherein the culture density of the megalop is controlled to be 1,000 to 2,000 fries per cubic meter; or culturing the zoeae at the fifth stage for 4 to 8 days, wherein the culture density is 2,000 to 4,000 fries per cubic meter; the water temperature of the megalop culture pond is between 24 and 32 DEG C; and the salinity is 1.5 to 2.6 percent; and transferring the megalop into a young Scylla culture pond, wherein the area of the young Scylla culture pond is 0.5 to 3 mu; the water temperature is between 26 and 33 DEG C; and the salinity is 1.0 to 2.0 percent.

Description

technical field [0001] The invention relates to a method for cultivating mud crabs, in particular to a method for graded cultivation and seedling transplantation of mud crab seedlings. Background technique [0002] Blue crab (Scylla spp.) is a seawater crab traditionally cultured in the southern coastal provinces of my country, and has been listed as one of the main developing species in the current agricultural industrial structure adjustment. For a long time, the seedlings of blue crab culture come from natural sea areas, subject to natural conditions, it is difficult to guarantee the quantity. Providing a sufficient amount of healthy seedlings has become a key factor for the sustainable development of mud crab farming. In recent years, the technology of artificial breeding of blue crabs has been successful and has gradually reached the level of industrialization. [0003] The cultivation of crab seedlings includes three stages: zoan larvae, megalopa and larvae. Crab la...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 叶海辉王桂忠林琼武李少菁
Owner XIAMEN UNIV
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