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Method for cultivating young portunid

A technology of portunus and nursery ponds, applied in fish farming, application, climate change adaptation, etc., can solve the problems of reduced immunity of swimming crabs, reduced survival rate of breeding, increased production costs, etc., to improve immunity, avoid drug abuse, The effect of reducing the cost of growth

Active Publication Date: 2014-06-11
ZHEJIANG MARINE DEV RES INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The traditional seedling cultivation process of Portunus trituberculatus changes a lot of water, consumes a lot of energy, and increases production costs.
Its disadvantage is that a large number of water changes in the process of raising seedlings will reduce the immunity of swimming crabs and reduce the survival rate of breeding.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A method for growing portunus seedlings, said method comprising the following steps:

[0033] a) Preliminary preparation: After soaking the nursery pond in clean water for 1 day, disinfect the nursery pond with 50ppm of bleaching powder, and then rinse it with clean water. After the nursery pond is dried, lay sterilized sea mud with a thickness of 4cm on the bottom of the nursery pond. Introduce seawater then in the nursery pond, add Bdellovibrio liquid and nitrifying bacteria liquid in the nursery pond, make Bdellovibrio content reach 10 in the seawater 3 cfu / mL, the content of nitrifying bacteria reaches 10 3 cfu / mL, then shading and standing for 5 days;

[0034] b) Oviposition: Put fertilized female crabs whose egg color has turned gray-black and whose embryo body heartbeat has reached more than 150 times / min into the nursery pond of step a), and the density of seedlings in the nursery pond is 15×10 4 piece / m 3 ;

[0035] Among them, the female crabs before spaw...

Embodiment 2

[0041] A method for portunus seedling cultivation, said method comprising the following steps:

[0042] a) Preliminary preparation: After soaking the nursery pond in clean water for 1 day, disinfect the nursery pond with 800ppm bleaching powder, and then rinse it with clean water. After the nursery pond is dried, lay sterilized sea mud with a thickness of 5cm on the bottom of the nursery pond. Then introduce seawater in the nursery pond, add Bdellovibrio liquid and nitrifying bacteria in the nursery pond, make the Bdellovibrio content reach 10 in the seawater 4 cfu / mL, the content of nitrifying bacteria reaches 10 4 cfu / mL, then shading and standing for 6 days;

[0043] b) Oviposition: Put fertilized female crabs whose egg color has turned gray-black and whose embryo body heart beats above 160 times / min into the nursery pond of step a), and the seedling density in the nursery pond is 18*10 4 piece / m 3 ;

[0044] Among them, the female crabs before spawning are kept in the...

Embodiment 3

[0050] A method for portunus seedling cultivation, said method comprising the following steps:

[0051] a) Preliminary preparation: After soaking the seedling pool in clean water for 2 days, disinfect the seedling pool with 100ppm of bleaching powder, and then rinse it with clean water. After the seedling pool is dried, lay sterilized sea mud with a thickness of 8cm on the bottom of the nursery pool. Then introduce seawater in the nursery pond, add Bdellovibrio liquid and nitrifying bacteria in the nursery pond, make the Bdellovibrio content reach 10 in the seawater 6 cfu / mL, the content of nitrifying bacteria reaches 10 4 cfu / mL, then shading and standing for 8 days;

[0052] b) Spawning eggs: put fertilized female crabs whose egg color has turned gray-black and embryo body heart rate above 160 times / min into the nursery pond of step a), and the density of seedlings in the nursery pond is 20*10 4 piece / m 3 ;

[0053] Among them, the female crabs before spawning are kept ...

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Abstract

The invention provides a method for cultivating young portunid, comprising the following steps of early-stage preparation: soaking a cultivation pond with clean water for 1-2 days, then sterilizing the cultivation pond with 50ppm-100ppm bleaching powder, paving sterilized sea mud on the bottom of the cultivation pond, introducing sea water and adding bdellovibrio solution and nitrifying bacteria; spawning; after-treatment: throwing bacillus solution during the cultivation process. By the adoption of the method provided by the invention, the water can be purified, the water quality can be improved, and the residues caused by a conventional cultivation method can be prevented; meanwhile, as the water is not changed during the cultivation process, the growing cost is reduced; not only is the survival rate of the young portunid improved, but also the immunity of the young portunid can be improved; with the utilization of the method, the abuse of drugs such as antibiotics in production is avoided; the incidence of diseases is lowered; the production yield is improved.

Description

technical field [0001] The invention relates to the technical field of aquaculture, in particular to a method for raising portunus seedlings. [0002] Background technique [0003] Swimming crab, the scientific name is "Swift crab", because the carapace is in the shape of a shuttle, and there are three protrusions in the center of the carapace, so it is also called the swimming crab with three-spotted crabs. Portunus trituberculatus is large in size, fast in growth, high in use value, delicious in meat quality, rich in nutrition, and has a large edible proportion. It not only has high nutritional value, but also has medicinal values ​​such as clearing heat, dispersing blood, and nourishing yin. It is mainly produced in the Yellow Sea, Bohai Sea and East China Sea. Due to the improvement of people's living standards, marine crabs cannot meet people's growing needs, so artificial breeding has begun. The traditional seedling cultivation process of Portunus trituberculatus ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 杨会成廖妙飞周宇芳钟明杰付万冬马华威
Owner ZHEJIANG MARINE DEV RES INST
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