Method for breeding crabs and controlling diseases

A disease control method and crab technology are applied in the field of breeding and crab disease prevention and control, which can solve the problems of ecological environment destruction of crabs, low survival rate of crab seedlings, small adult crabs, etc. fresh and sweet effect

Inactive Publication Date: 2009-12-09
孔赟荣
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Problems solved by technology

[0003] Artificially cultured crabs are usually divided into the seedling stage--the stage of the zodiac body to the stage of the big-eyed body; Different baits are needed, and different growth environments are needed. The current artificial breeding often ignores the scientific setting of the ecological

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Embodiment Construction

[0040] The best way to implement the present invention is to adopt super-large-scale natural water system, such as Qiantang River, Fuchun River, Puyang River, the natural parents of different places in the Qiandao Lake waters of the upper reaches of Xin'an River, such as: adopt the natural crab parent A of Fuchun River and Shanghai Chongming Natural crab parent B, the female crab parent is selected to exceed 220 grams, and the male crab parent is selected to exceed 300 grams. Parent A and parent B are hybridized at a low temperature of 4-6°C, and then the egg-bearing crabs are placed at a low temperature of 6-7°C. Refrigerate to keep the embryos in a state of slow development until the breeding season to generate the first generation, select the largest individual from the first generation, and select the parent with typical characteristics to cross with parent A or parent B to produce the second generation, and then select the largest individual, the second generation from the ...

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Abstract

The invention belongs to the field of aquiculture, and relates to a method for breeding crabs and controlling diseases. The method provides an original biological environment with the best surviving and growing conditions for natural crabs, and obtains high quality Chinese Eriocheir sinensis as a crab seed by backcross and purification and rejuvenation. Breeding of the crab is returned nature by creating the original biological environment of crab survival, namely a natural crab pond, and carrying out a scientific and biological breeding method; and original biological environment and range suitable for crab growth are set, such as requirement on original biology of the crab pond, water quality, water temperature, breeding density, scientific bait dosage, water seed coverage rate and the like, and the unhealthy method which uses antibiotics, hormones and other medicaments and industrial synthetic feeds in a breeding process is eliminated, so that the bred crabs are big and strong, has rich cream, delicious meat and rich smell of wild crabs with average specification of between 150 and 250 grams. The crab can meet the requirements on export and pollution-free food, has high economic value and good social benefit.

Description

technical field [0001] The invention belongs to the field of aquaculture, and in particular relates to methods for cultivating crabs and controlling diseases of crabs. Background technique [0002] Crabs, also known as river crabs, are freshwater crustaceans. They grow up in freshwater and become sexually mature at the second age. Crabs generally mate at 10-15°C, lay eggs in the waters where sea and freshwater meet, and form flea-like bodies. In the environment, the flea-shaped body of crabs evolves into adult crabs through big-eyed body, larvae, crab, and crab species. Crab meat is delicious and nutritious, and is regarded as a delicacy. Catching natural crab seedlings or artificially cultivated crab seedlings for breeding has high economic and social benefits. [0003] Artificially cultured crabs are usually divided into the seedling stage--the stage of the zodiac body to the stage of the big-eyed body; Different baits are needed, and different growth environments are ne...

Claims

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Application Information

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IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 孔赟荣
Owner 孔赟荣
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