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Method for ecologically cultivating larva of blue crab in pond

A pond and crab breeding technology, which is applied in the field of seedling cultivation, can solve the problems of low survival rate and poor seedling quality of blue crab seedlings

Inactive Publication Date: 2011-06-15
北海市生产力促进中心
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide a method for ecological seedling cultivation in mud crab ponds, to solve the problems of low survival rate and poor quality of seedlings in mud crab seedling cultivation, and to overcome the shortcomings of traditional mud crab seedling cultivation methods

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] (1) The bottom area of ​​the crab breeding pond is 10-20m 2 In the cement pool, sea sand with a thickness of 10 to 15 cm is laid on half of the bottom of the pool, and building materials are used to build shelters on top of it. In order to inhibit the reproduction of diatoms on the sand bed, the pool is shaded so that the light is below 500 Lux. The sand in the cultivation pool is sterilized by soaking in 3‰ sodium hypochlorite solution for 24 hours, and then neutralizes residual chlorine with 0.3‰ sodium thiosulfate, and is washed 3-10 times by seawater. Select healthy species of crabs from natural sea areas or breeding ponds. Before entering the pool, species of crabs are sterilized with 200ppm formaldehyde solution for 20 minutes to keep their large claws in a natural state with retracted wrists bent. At this time, the two large claws The palms of the crabs are closely attached to the long joints, and the palms and long joints of the two large claws of the crab are t...

Embodiment 2

[0023] (1) is basically the same as step (1) of Example 1, the difference is that the density of 3 per square meter is stocked in the cultivation pond, the temperature of the pond water is maintained at 25-30 ° C, the salinity is 22-26 ‰, and it is fed every day Low-value shellfish bait that has been shelled once, the amount of bait to be fed is 8% of the crab's weight, the water is changed once a day, and the dew is dried for 2 hours each time;

[0024] (2) is identical with the step (2) of embodiment 1;

[0025] (3) is basically the same as the step (3) of embodiment 1, difference is that the bleaching powder 30ppm disinfection treatment that adopts available chlorine content to 30% to the nursery pond, after 2 days soaking disinfection, water is drained, put into 200 mesh sieves again The fresh seawater filtered by the net, the water storage depth is 100cm, and the urea 5.0kg and the superphosphate 0.5kg are applied per mu;

[0026] (4) put the egg-bearing crabs that are e...

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Abstract

The invention discloses a method for ecologically cultivating larva of blue crab in a pond. The traditional method for cultivating larva of blue crab has low survival rate of larva seed; in order to improve the survival rate of the offspring seed, firstly the survival rate of the crab seed from strengthened cultivation to spawning season is necessarily improved, which is taken as precondition forimproving survival rate of crab seed; and then the rational and scientific ecologic cultivation is realized to improve the survival rate of crab seed and meet the need of mass production of blue crab. The method comprises following steps: using bound seed crab rock lobster; cutting single-side eye handle, using flowing water stimulation method to improve the survival rate of broody crab to 70-80%; then propagating natural alga and using biological agent comprising photosynthetic bacteria to maintain excellent micro-ecological environment of pond, the propagation of bacteria is restrained, thetransparency is reduced, the inter-killing of the crab larvae is reduced, the survival rate of zoea changing as megalopa is improved. The method has quick growing speed of larvae, regular growth and larva survival rate reaching 30%.

Description

technical field [0001] The invention relates to a seedling raising method for improving the quality of mud crab seedlings, in particular to an ecological seedling raising method for mud crab ponds. Background technique [0002] Scylla serrata, commonly known as blue crab and red sturgeon, is distributed in southern China, Japan, India, Africa and other tropical and subtropical harbors and coastal mangrove swamps. In my country, it is mainly produced in Fujian, Zhejiang, south of the Yangtze River estuary. , Taiwan, Guangdong and the coastal areas of Guangxi, Scylla serrata has delicious meat, unique flavor, rich nutrition, and can also be used as medicine. It is a famous edible crab with high economic value and great demand in domestic and foreign markets. Scylla serrata is a Warm water crab species are the main economic crab species cultured in the southern coast of my country. With the improvement of breeding technology and the expansion of breeding scale, the artificial bre...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 聂振平苏琼蔡德健谢达游出超
Owner 北海市生产力促进中心
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