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High-efficiency river crab seedling growing integrated cultivation method

A cultivation method and technology of river crabs, which are applied in the field of integrated cultivation of efficient river crab seedlings, can solve problems such as nutrition and water environment are difficult to meet the physiological and ecological needs of crab seedlings, low utilization efficiency of rotifer cultivation ponds, and difficult to guarantee the quality of crab seedlings. To achieve the effect of increasing aquatic production benefits, good water environment for seedling breeding, and maintaining reproduction speed

Active Publication Date: 2017-05-10
SHEYANG ZHUPING AQUATIC FINGERLINGS CO LTD
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  • Application Information

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Problems solved by technology

At present, it takes 6-8 days to produce microorganisms in conventional rotifer cultivation ponds by fermenting chicken manure, which is a long time, and the utilization efficiency of rotifer cultivation ponds is low
In addition, seedlings are raised in indoor cement ponds, and a large amount of artificial feed is fed in a limited water body. In addition, the density of larvae is high, and the nutrition and water environment are difficult to meet the physiological and ecological needs of the growth and development of crab seedlings. It is difficult to guarantee the quality of crab seedlings. , in order to solve this problem, the technicians of scientific research units and enterprises are constantly exploring and researching, hoping to find a more efficient method of raising crab seedlings. Although some progress has been made, there are still some problems in practical application technical problems overcome

Method used

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  • High-efficiency river crab seedling growing integrated cultivation method

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Effect test

Embodiment 1

[0018] Integrated cultivation of high-quality healthy crab seedlings, selection of seawater breeding nursery ponds with stable natural water temperature at 23°C, and use of crystal trichlorfon technical 3-4g / m 3 The clear pond kills harmful organisms, disinfects the water body after entering the water, releases river crab larvae after the drug effect disappears in the nursery pond, and releases the crab larvae at a density of 10,000 fish / m 3 , after the larvae are thrown in, the rotifers in the rotifer cultivation pond 3 are pumped out in circulation and filtered with a 200-mesh sieve, and fed into the river crab nursery pond 4 after concentration; the rotifer feeding density is 2-3 / ml , and maintain the density of rotifers; the rotifers are fed with Nitzia crescentus and microorganisms, and when feeding the rotifers, the water in the crescent rhombus culture pool 2 is directly fed by a water pump. This not only maintains the speed of reproduction of rotifers, but also improve...

Embodiment 2

[0020] The suitable area of ​​the nursery pond is 5 mu, the water depth is 2 meters, and the effect of installing an aerator is better. Crescent algae cultivation pool 2 is suitable for an area of ​​1-3 mu, and the water depth is about 1 meter; the rotifer cultivation pool 3 is suitable for an area of ​​1-5 mu, and the water depth is 1 meter.

[0021] River crab larvae are placed in the river crab nursery pool 4, the natural water temperature of the nursery is 22-25°C, and the stocking density is 20,000 fish / m 3 , after the larvae are released, the rotifers are fed. The rotifers in the rotifer cultivation pool 3 are pumped out and filtered with a 250-mesh sieve, and fed to the river crab nursery pool 4 after concentration; the rotifer feeding density is 3-4 / ml, and keep the rotifers density. The rotifers are fed with Nitzia lunata, and the water is pumped out in the Nitztella crescentus cultivation pond 2, and fed into the rotifer cultivation pond 3.

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Abstract

A high-efficiency river crab seedling growing integrated cultivation method comprises the following steps: 1, integrated design of a river crab seedling growing pool; 2, water fertilizing and microorganism cultivation; 3, Nitzschia closterium cultivation; 4, rotifer cultivation; and 5, river crab seedling cultivation. The method shortens the seedling growing period, is simple in facility and low in cost, and has good nutrient indices and a good seedling growing water environment. The rotifers feed on microorganisms and Nitzschia closterium, so that the breeding speed of the rotifers is maintained and the disease resistance of the rotifers is improved. After zoea larvae of river crabs feed on the high quality rotifers, the physique of the river crabs is enhanced, the survival rate of the larvae is increased from 40-45% to 70-80%, so that the unit aquatic product benefit is increased.

Description

technical field [0001] The invention relates to a method for cultivating river crabs, in particular to an integrated cultivation method for raising efficient river crab seedlings. Background technique [0002] Since the reform and opening up, the national economy has grown rapidly, and "scientific and technological innovation, independent innovation" has become the mainstream of domestic industrial development. my country's industry is gradually developing in the direction of intensive, energy-saving, emission-reducing, and low-carbon. Brachionus rugosa is a small multicellular aquatic organism widely distributed in brackish water and seawater. It is a high-quality bait organism for artificially cultivating seawater fish, shrimp, and crab larvae. At present, it takes 6-8 days to produce microorganisms by fermenting chicken manure in conventional rotifer cultivation ponds, which is a long time, and the utilization efficiency of the rotifer cultivation ponds is low. In addit...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/59
CPCY02A40/81
Inventor 朱平陈瑜
Owner SHEYANG ZHUPING AQUATIC FINGERLINGS CO LTD
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