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Double cultivating method of blue crab

A breeding method and technology of mud crabs, which are applied in fish farming, climate change adaptation, animal feed, etc., can solve problems such as unreasonable use of production materials, falling prices, waste of resources, etc.

Inactive Publication Date: 2008-07-30
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, blue crab breeding is generally done once a year, and the breeding ponds are idle for at least 100 days during the time suitable for blue crab breeding, resulting in a waste of resources that cannot be used rationally for production materials
In addition, one crop a year causes the market supply time of blue crabs to be too concentrated, causing its price to drop sharply; and during the non-traditional harvest season of blue crabs, there is not enough supply of blue crabs on the market

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] In southern Fujian, the first crop starts to stock spring seedlings from March to April, and the crops are harvested from August to October of that year; the second crop is stocked from September to November to harvest autumn seedlings, and the crops are harvested from February to April of the next year. Breeding measures: ① Clear ponds; clear ponds with quicklime before stocking to kill harmful organisms in the ponds. ②Water quality; dissolved oxygen 3.2mg / L; water temperature 18-20°C; salinity 10-20, pH 8.0-8.2; transparency 22-23cm. ; The number of autumn seedlings is 2800-3000 per mu. ④ Feed feeding: The daily feeding amount of small miscellaneous fish and shrimp is generally controlled at 8% to 10% of the total weight of blue crabs; low-value shellfish use fresh baits such as oysters, clams and blue clams, which can be controlled within blue crabs. 25% to 30% of the total weight of crabs. 2 votes in the morning and evening, 30% to 35% in the morning and 65% to 70...

Embodiment 2

[0020] In southern Fujian, the first batch of summer seedlings is stocked from May to June, and the harvest is from September to November of that year; the second crop of autumn seedlings is stocked from October to November, and the harvest is from April to May of that year. Breeding measures: ① Clear ponds; clear ponds with quicklime before stocking to kill harmful organisms in the ponds. ②Water quality; dissolved oxygen 3.1mg / L; water temperature 20-23°C; salinity 15-20, pH 8.3-8.5; transparency 20-22cm. ③ Stocking density: 1600-2000 per mu for spring and summer ; The number of autumn seedlings is 2500-2600 per mu. ④ Feed feeding: The daily feeding amount of small miscellaneous fish and shrimp is generally controlled at 5% to 8% of the total weight of blue crabs; low-value shellfish use fresh baits such as oysters, short-toothed clams and snails, which can be controlled at 5% to 8% of the total weight of blue crabs. 30% to 35% of the total weight. There are 2 votes in the ...

Embodiment 3

[0022] In the Chaoshan area, the first crop started to stock spring seedlings in March, and the crops were harvested from August to October of that year; the second crop was stocked with autumn seedlings from September to November, and the crops were harvested from February to April of that year. Breeding measures: ① Clear ponds; clear ponds with quicklime and bleach before stocking to kill harmful organisms in the ponds. ② Water quality; dissolved oxygen 3mg / L; water temperature 22-25°C; salinity 25-30, pH 8.2-8.3; transparency 23-25cm. ③ Stocking density: 1300-1500 per mu for spring and summer seedlings; Autumn seedlings are 2000-2400 per mu. ④ Feed feeding: The amount of daily feeding of small miscellaneous fish and shrimps is generally controlled at 10% to 12% of the total weight of blue crabs; It is controlled at 20% to 25% of the total weight of blue crabs. There are 2 votes in the morning and evening, 36% to 40% in the morning and 60% to 64% in the evening. Adjust th...

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PUM

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Abstract

A method for cultivating green crabs for two harvests in one year relates to an aquiculture method, which provides a method for cultivating green crabs with two harvests in one year. The first harvest begins to stock spring seedlings from the last ten days of February to the first ten day of March, and harvests in September or October of the same year after cultivating; or the first harvest begins to stock summer seedling in May or June, and harvests in October or November of the same year after cultivating. The second harvest begins to stock autumn seedlings from September to November, and harvests from February to May of the next year after cultivating. The method includes: pool cleaning: cleaning the pool before stocking with one of quicklime and bleaching powder, etc.; water quality: dissolving at least 3mg of oxygen in each L of water with a water temperature of 18 to 25 DEG C, a salinity of 10 to 30, a pH value of 8.0 to 8.5 and a diaphaneity of 20 to 25cm; stocking density: 1000-2000 / mu for the spring or summer seedlings and 3000-5000 / mu for the autumn seedlings; the baits are fresh baits of small and miscellaneous fish and shrimp and low cost shellfish, etc., and are grounded twice a day in the morning or in the afternoon.

Description

technical field [0001] The invention relates to an aquaculture method, in particular to a method for cultivating blue crabs twice a year. Background technique [0002] The blue crab has delicious meat, rich nutrition, fast growth and strong stress resistance. It is an excellent cultured species in the southeast coast of my country. Blue crabs grow rapidly, and they can become commercial crabs on the market after more than 3 months of breeding, and reach sexual maturity after about 8 months of breeding. At present, blue crab breeding is generally done once a year, and the breeding ponds are idle for at least 100 days during the time suitable for blue crab breeding, resulting in a waste of resources that cannot be used rationally for production materials. In addition, one crop a year causes the market supply time of blue crabs to be too concentrated, causing its price to drop sharply; and during the non-traditional harvest season of blue crabs, there is not enough supply of b...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00A23K1/18A23K10/22A23K50/80
CPCY02A40/81
Inventor 叶海辉王桂忠林琼武李少菁
Owner XIAMEN UNIV
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