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A method for fattening and cultivating sea-caught wild swimming crabs in sand ponds

A technology of wild shuttle crab and breeding method, which is applied in the field of sea-caught wild swimming crab sand pond fattening and breeding, can solve the problems of high breeding environment requirements, high disease rate and mortality rate, reduce disease rate and mortality rate, improve economic benefits, and promote The effect of uniform dispersion effect

Active Publication Date: 2020-06-16
ZHEJIANG OCEAN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Aiming at the problems that the wild swimming crabs caught in the sea are wild, have high requirements on the breeding environment, and are easily affected by water quality deterioration or diseases, resulting in high disease rate and mortality, the purpose of the present invention is to provide a method to reduce the incidence of wild swimming crabs. and mortality, increase the fattening method of fattening sea-caught wild swimming crabs, and improve the economic value of sea-catching wild swimming crabs

Method used

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  • A method for fattening and cultivating sea-caught wild swimming crabs in sand ponds

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Effect test

Embodiment 1

[0026] A method for fattening and cultivating wild swimming crabs in a sand pond, comprising the following steps:

[0027] (1) Temporary cultivation pond preparation: Temporary cultivation pond 1 is 10 m wide and 20 m long. Aerator 3 is installed in the pond, preferably diaphragm aerator. The number of aerators is 6 per mu. Connect to each other with the air compressor pump 4 through the ventilation pipe, set the gravel layer at the bottom of the holding tank, the thickness of the gravel layer is 15 cm, and the particle size of the gravel is 0.6 cm. In order to suppress the deterioration of water quality, a circulating water pipeline 5 comprising a water filter 51 and a water pump 52 is set, and the holding tank is arranged in series with the water filter and the water pump in the circulating water pipeline, and the inner wall of the water filter is provided with an ultraviolet lamp. There is a water purification tank 2 for holding seawater on the side of the holding pool. Bio...

Embodiment 2

[0033] A method for fattening and cultivating wild swimming crabs in a sand pond, comprising the following steps:

[0034](1) Temporary cultivation pond preparation: Temporary cultivation pond 1 is 15 m wide and 30 m long. Aerator 3 is installed in the pond, preferably diaphragm aerator. The number of aerators is 8 per mu. Connect to each other with the air compressor pump 4 through the ventilation pipe, set the gravel layer at the bottom of the holding tank, the thickness of the gravel layer is 20 cm, and the particle size of the gravel is 0.8 cm. In order to suppress the deterioration of water quality, a circulating water pipeline 5 comprising a water filter 51 and a water pump 52 is set. There is a water purification tank 2 holding seawater on the side of the breeding tank. Bioflocculant NOC-1 is added to the seawater in the water purification tank. The outlet of the water purification tank is equipped with a filter screen, and the mass concentration of spraying to the hold...

Embodiment 3

[0040] A method for fattening and cultivating wild swimming crabs in a sand pond, comprising the following steps:

[0041] (1) Temporary cultivation pond preparation: Temporary cultivation pond 1 is 20 m wide and 40 m long. Aerator 3 is installed in the pond, preferably diaphragm aerator. The number of aerators is 10 per mu. Connect to each other with the air compressor pump 4 through the ventilation pipe, set the gravel layer at the bottom of the holding pond, the thickness of the gravel layer is 25 cm, and the particle size of the gravel is 1.2 cm. In order to suppress the deterioration of water quality, a circulating water pipeline 5 comprising a water filter 51 and a water pump 52 is set. There is a water purification tank with seawater on the side of the breeding tank. The biological flocculant NOC-1 is added to the seawater in the water purification tank. Disinfect with bleach solution, then expose to the sun for 5 days;

[0042] (2) Sanding and water injection: Inject...

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Abstract

The invention belongs to the field of aquaculture and particularly discloses an ocean fishing wild swimming crab sand pit fattening breeding method. The method includes the steps that a temporary rearing pond is prepared; sand is laid in the temporary rearing pond and water is injected into the temporary rearing pond; crab varieties are selected; feeding is conducted twice a day, wherein the death rate and the disability rate can be reduced by selecting female crabs captured from a sea area crab cage, and the female crabs obtained after molting and mating can achieve high-density rearing; air which is introduced in a dispersed mode increases the dissolved oxygen content so as to satisfy the aerobic characteristic of wild swimming crabs and enhances the sea water turbulence degree to inhibit water quality deterioration; a circulating water pipeline accelerates sea water update and flowing, inhibits water quality deterioration and promotes air dispersion; a water filter can effectively remove pollutants like organic matter in seawater, pathogenic organisms like bacteria are killed, and diseases are reduced; residual bait and injured and diseased crabs in the temporary rearing pond are picked after two times of drainage every day, and water quality deterioration and disease spreading are inhibited. In a word, the disease rate and death rate of the swimming crabs are reduced, fattening growth and quality of the wild swimming crabs are promoted, and economic benefits are improved.

Description

technical field [0001] The invention belongs to the field of aquaculture, and in particular relates to a method for fattening and cultivating wild portunus caught in the sea in sand ponds. Background technique [0002] Swimming crab, also known as Portunus trituberculatus, is large and meaty, delicious and nutritious. It is distributed along the coasts of Bohai Bay, Jiangsu, Zhejiang, and Fujian. Usually, from September to October every year is the season for wild swimming crabs in natural sea areas to flourish. However, since the season of growing cream is not yet reached, the plumpness of swimming crabs is insufficient at this time, the quality is relatively poor, and the price is low. The average price purchased from fishing boats is less than 10. Yuan / kg, some wild swimming crabs that are still in the molting stage are too low in plumpness and can only be treated as fertilizers, resulting in a great waste of resources. If the sea-caught wild portunus female crabs can be...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/59A01K63/04
CPCA01K63/04A01K63/042A01K63/045Y02A40/81
Inventor 许文军何杰谢建军王庚申施慧汪玮
Owner ZHEJIANG OCEAN UNIV
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