Controllable synchronous brooding breeding method of cherax quadricarinatus

A technology for light-shell crayfish and breeding ponds, which is applied in the fields of climate change adaptation, application, fish farming, etc., can solve the problems of large damage to broodstock, low survival rate of shrimp fry, killing, etc., and achieves obvious effects and improves synchronous brooding. efficiency, simple operation

Inactive Publication Date: 2012-03-21
EAST CHINA NORMAL UNIV
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  • Summary
  • Abstract
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  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The source of seedlings of red clawed crayfish is extremely unstable and the specifications are uneven, resulting in serious carnage during the production process and low survival rate of shrimp seedlings
In the past, the eyestalk removal method and the drug administration method were used in the artificially induced synchronous spawning technology, but the damage to the broodstock was large, the mortality rate was high, and the production effect was not good. At the same time, the above methods were not suitable for large-scale production.

Method used

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  • Controllable synchronous brooding breeding method of cherax quadricarinatus
  • Controllable synchronous brooding breeding method of cherax quadricarinatus
  • Controllable synchronous brooding breeding method of cherax quadricarinatus

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] Embodiment 1: the synchronous ovulation breeding method of red claw light shell crayfish

[0024] Step 1: Preparation of the Breeding Tank

[0025] The indoor cement pool is used as the breeding pool for red-clawed lightshell crayfish. There is no pollution source around, good ventilation, sufficient light, and complete supporting facilities such as water, electricity, and heating systems. The breeding pond needs to be equipped with an inflatable aerator, and a microporous tube or an aeration head is arranged in the pond to ensure sufficient dissolved oxygen and uniform oxygenation in the whole pond.

[0026] The specific size of each broodstock pond area can be flexibly controlled according to the production scale, and should not be too large. The area of ​​each breeding pond is 50-100m 2 . In order to reduce the cannibalism of broodstock, concealed objects are placed in the breeding ponds, and rice field eel cages are added as concealed objects in the parent bree...

Embodiment 2

[0044] Example 2: Effects of light on reproductive performance of red-clawed crayfish and egg quality of fertilized eggs

[0045] A total of 150 well-developed female shrimps and 75 male shrimps were used for the experiment. The experiment was divided into 5 groups, and 45 shrimps in each group were raised in three non-toxic plastic breeding boxes of 80cm×50cm×50cm, and 10 shrimps were randomly placed in each tank. Female and 5 male. The water temperature is controlled at 26-28 ℃, the water depth is 50-80 cm, intermittent oxygenation, bait is fed every evening, and the feces and residual bait are sucked off in the morning of the next day, and 1 / 3 of the water is changed.

[0046] The experimental group I was the natural light group, which was raised in an outdoor plastic shed; the other four groups were placed in a dark room with a 200 W incandescent lamp as the light source, and the light intensity on the water surface was 3000 lx. The light time in the dark room started at...

Embodiment 3

[0057] Embodiment 3: the influence of temperature on the reproductive performance of red-clawed light shell crayfish

[0058] A total of 120 well-developed female shrimps and 60 male shrimps were used for the experiment. The experiment was divided into 5 groups, 45 shrimps in each group were raised in three non-toxic plastic breeding boxes of 80cm×50cm×50cm, and 10 shrimps were randomly placed in each tank. Female and 5 male. The water temperature is controlled at 26-28 ℃, the water depth is 50-80 cm, intermittent oxygenation, bait is fed every evening, and the feces and residual bait are sucked off in the morning of the next day, and 1 / 3 of the water is changed.

[0059] The experiment was carried out in the overwintering room, the room temperature was about 15°C, and the broodstock shrimp were divided into 4 groups. The first group was at natural water temperature (if the water temperature was lower than 10°C, the heating rod would be automatically heated), the second grou...

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Abstract

The invention provides a controllable synchronous brooding breeding method of cherax quadricarinatus, which comprises the following steps of: preparing a breeding pool; adjusting and controlling the water quality of the breeding pool; selecting parent shrimps; intensively culturing the parent shrimps; controlling overwintering temperature of the parent shrimps; controlling the brooding rate of the parent shrimps by manually adjusting the temperature and illumination conditions; producing seedlings; culturing shrimp larva, and the like. According to the invention, by modifying the breeding pool, controlling the water quality, selecting the parent shrimps, adjusting the illumination and the temperature and controlling the gonad development of the parent shrimps, the spawning time of the parent shrimp group is promoted to be centralized and synchronous relatively, and the problem of uneven culturing specifications of seedlings in the large-scale production is effectively solved.

Description

technical field [0001] The invention relates to a seed breeding method of economical aquatic crustaceans, in particular to a controllable and synchronous ovulation breeding method of red-clawed crayfish. Background technique [0002] Currently, the red clawed crayfish ( Cherax quadricarionatus ) as a promising economical crustacean, how to improve the spawning synchronization rate of broodstock has always been one of the technical problems of the red clawed crayfish and even other crustaceans. The source of seedlings of red clawed crayfish is extremely unstable and the specifications are uneven, resulting in serious carnage during the production process and low survival rate of shrimp seedlings. In the past, the eyestalk removal method and drug administration method were used in the artificially induced synchronous spawning technology, but the damage to the broodstock was large, the mortality rate was high, and the production effect was not good. At the same time, the above...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K61/00
CPCY02A40/81
Inventor 赵云龙罗文李嘉尧郭占林左迪沈竑
Owner EAST CHINA NORMAL UNIV
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