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River crab breeding method

A breeding method and technology for river crabs, which are applied in fish farming, climate change adaptation, animal feed, etc., can solve problems such as the improvement of unfavorable breeding efficiency of river crabs, foreign exchange earnings from exports, and small size, so as to improve the breeding output and breeding efficiency, prevent the The effect of precocious puberty and prolonged growth period

Inactive Publication Date: 2008-11-19
FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Therefore, using the traditional river crab breeding method, the size of the commercial crabs grown is relatively small, most individuals are between 100-150 grams, and some individuals are 50-100 grams and 150-300 grams. The small size of river crabs is not conducive to the benefits of river crab breeding Raise and export earnings

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The present invention is a kind of cultivation method of river crab, and the technological step that adopts is as follows:

[0023] 1. Purchase and transportation of crab seedlings: buy crab seedlings bred from the beginning of May to the end of June. The crab seedlings are required to be golden yellow in color, strong in activity, free of parasites on the body surface and strong in physique, and the parents of the breeding crab seedlings are River crab in the Yangtze river system. Transportation of crab seedlings: Transport crab seedlings in a seedling box of 1.0×0.6×0.15 meters, with 500-1000 grams of seedlings in each box.

[0024] 2. Cultivation of crab seedlings: Before the crab seedlings are stocked, clean and disinfect the seedling pool with quicklime. The amount of quicklime is 75-100 kg / mu; The upper end is sewn with a plastic film with a width of 20-30 cm, and the fence is 80 cm high, of which 20 cm is buried in the mud, and a bamboo stake is fixed every 2 me...

Embodiment 2

[0030] The present invention is a kind of cultivation method of river crab, and the technological step that adopts is as follows:

[0031] When purchasing seedlings bred from the beginning of May to the end of June, it is required that the body color of the seedlings is golden yellow, strong in activity, free of parasites on the body surface, and strong in physique, and the parents of the seedlings for breeding are river crabs in the Yangtze River system. Before the crab seedlings are put in a suitable place to breed, the ponds are cleared, fertilized, planted grass and anti-escape fences are set up in the breeding ponds. After 7 days after clearing the ponds, 0.8 kg of crab seedlings are stocked in every acre of ponds. The species of aquatic plants planted in the crab pond are Elodea, water peanut, Hydrilla verticillium and bitter grass, covering more than 60% of the total area of ​​the pond. The feed for crab seedlings is mainly surimi, eggs and artificial pellet feed, which...

Embodiment 3

[0033] The present invention is a kind of cultivation method of river crab, and the technological step that adopts is as follows:

[0034] When purchasing seedlings bred from the beginning of May to the end of June, it is required that the body color of the seedlings is golden yellow, strong in activity, free of parasites on the body surface, and strong in physique, and the parents of the seedlings for breeding are river crabs in the Yangtze River system. Before the crab seedlings are put in a suitable place to breed, the breeding ponds are cleared, fertilized, planted grass and anti-escape fences are set up. After 7 days after clearing the ponds, 0.5 kg of crab seedlings are stocked in every acre of ponds. The species of aquatic plants planted in the crab pond are Elodea, water peanut, Hydrilla verticillium and bitter grass, covering more than 60% of the total area of ​​the pond. The feed for crab seedlings is mainly surimi, eggs and artificial pellet feed, which are fed 2-4 ...

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Abstract

The invention relates to a method for culturing river crabs, in particular to a method, by which the river crabs cultured in a pond or other water areas and become large-size commercial crabs. The method is characterized in that the method comprises the steps of purchasing crab larvae; culturing the crab larvae: the disinfection of the crab larvae incubating pond, the arrangement of the escape preventing fence, fertilization, water injection to the crab larvae pond, the float grass cultivation, the stocking of the crab larva, and the feeding of artificial food; the over-winter of first instar crab; the culturing of the second instar crab: the disinfection of the crab larvae incubating pond, the arrangement of the escape preventing fence, fertilization, water injection to the crab larvae pond, the float grass cultivation, the feeding of the first instar crab, and the feeding of artificial food; controlling the gonad development speed of the second instar crab: the artificial over-summer and the natural over-winter of the second instar crab; culturing the large-size river crabs: the feeding and management for the second instar crab, the artificial induction to the river crabs for exuviation and growth. The method is in favor of increasing the culture scale, the culturing yield and the economic benefit through controlling the gonad development speed of the second instar crabs and applying the technologies of culturing the large-size river crabs.

Description

technical field [0001] The invention relates to a method for cultivating river crabs, in particular to a method for raising river crabs into extra-large commercial crabs in ponds or other waters. Background technique [0002] The scientific name of the river crab is Eriocheir Sinensis H.Milne Edwards, which is one of the high-quality aquatic economic species in my country. Since the 1980s, my country has extensively carried out artificial breeding and breeding of river crabs, and formed an industrialized production system. With the expansion of breeding scale and the improvement of consumption level, the river crab farming industry has changed from simply pursuing an increase in output and quantity to focusing on improving efficiency and quality, and the farming form is also changing from labor-intensive to technology-based and knowledge-based. Change, the improvement of breeding efficiency not only needs to increase the output, but also must increase the size of river crab...

Claims

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Application Information

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IPC IPC(8): A01K61/00A23K1/18A23K50/80
CPCY02A40/81
Inventor 周鑫赵朝阳徐增洪徐仁仪
Owner FRESHWATER FISHERIES RES CENT OF CHINESE ACAD OF FISHERY SCI
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