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Seawater grouper high-density keep-alive method

A grouper, high-density technology, applied in fish farming, application, climate change adaptation, etc., can solve the problem of limited transportation density of fresh grouper, elevated serum cortisol hormone, and irritable personality of grouper. problems, to achieve the effect of reducing the transportation cost of keeping alive, weakening the metabolic activity, and reducing the content of serum cortisol

Pending Publication Date: 2022-07-08
BOHAI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the grouper has a violent personality, and it will have a strong stress response due to stimulation during fishing, loading, and transportation, and its dorsal fin is full of hard back spines. The transportation density of fresh and live grouper is limited, and the stress causes epidermal damage, which induces weakened disease resistance and low survival rate. At the same time, it also causes the increase of serum cortisol hormone in the fish, often causing great economic losses.

Method used

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  • Seawater grouper high-density keep-alive method

Examples

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Effect test

Embodiment 1

[0034] A kind of seawater grouper high-density keeping alive method, its process is as follows:

[0035] (1) Temporary rearing: Select groupers with no trauma, vigorous vitality, and uniform size (700±50g / tail), with an average length of 35.00±5.00cm, and temporarily raise them in a temporary rearing tank (90×45×30cm). , the temporary holding temperature is 26 ℃, the time is 24 hours, and the temporary holding tank is equipped with a circulation system, a heating system, and an oxygenation system;

[0036] (2) Low-temperature acclimation: program cooling of the temporarily raised sea grouper, the water temperature is 26°C, and the temperature is lowered by 3°C per hour to make the temperature drop to 20°C; when the temperature drops to 20°C, the temperature is lowered by 2°C per hour, Reduce the temperature to 16°C; when the temperature drops to 16°C, decrease the temperature by 1°C per hour, reduce the temperature to 15°C, and maintain the temperature at 15°C;

[0037] (3) A...

Embodiment 2

[0041] A kind of seawater grouper high-density keeping alive method, its process is as follows:

[0042] (1) Temporary rearing: Select groupers with no trauma, vigorous vitality, and uniform size (700±50g / tail), with an average length of 35.00±5.00cm, and temporarily raise them in a temporary rearing tank (90×45×30cm). , the temporary holding temperature is 26 ℃, the time is 24 hours, and the temporary holding tank is equipped with a circulation system, a heating system, and an oxygenation system;

[0043] (2) Low-temperature acclimation: program cooling of the temporarily raised sea grouper, the water temperature is 26°C, and the temperature is lowered by 3°C per hour to make the temperature drop to 20°C; when the temperature drops to 20°C, the temperature is lowered by 2°C per hour, Reduce the temperature to 16°C; when the temperature drops to 16°C, decrease the temperature by 1°C per hour, reduce the temperature to 15°C, and maintain the temperature at 15°C;

[0044] (3) A...

Embodiment 3

[0048] A kind of seawater grouper high-density keeping alive method, its process is as follows:

[0049](1) Temporary rearing: Select groupers with no trauma, vigorous vitality, and uniform size (700±50g / tail), with an average length of 35.00±5.00cm, and temporarily raise them in a temporary rearing tank (90×45×30cm). , the temporary holding temperature is 26 ℃, the time is 24 hours, and the temporary holding tank is equipped with a circulation system, a heating system, and an oxygenation system;

[0050] (2) Low-temperature acclimation: program cooling of the temporarily raised sea grouper, the water temperature is 26°C, and the temperature is lowered by 3°C per hour to make the temperature drop to 20°C; when the temperature drops to 20°C, the temperature is lowered by 2°C per hour, Reduce the temperature to 16°C; when the temperature drops to 16°C, decrease the temperature by 1°C per hour, reduce the temperature to 15°C, and maintain the temperature at 15°C;

[0051] (3) An...

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Abstract

The invention discloses a seawater grouper high-density keep-alive method, and belongs to the technical field of seawater fish keep-alive. The high-density keep-alive method comprises the following steps: temporarily rearing live groupers for 24-48 hours before a keep-alive experiment, performing low-temperature domestication after temporary rearing, then performing gradient cooling, anesthetizing the groupers in a CO2 aqueous solution with the concentration of 60-70mg / L after low-temperature domestication, and then keeping the groupers alive in water with the temperature of 15-16 DEG C. According to the method for keeping the grouper alive, the survival rate of the grouper can reach 90% or above when the grouper is kept alive in water for 72 h under the high density that the mass ratio of the grouper to the water is 1: 1.7. The keep-alive scheme is low in cost and high in operability, the survival rate of the groupers can be effectively increased, the survival time of the groupers can be effectively prolonged, the keep-alive density of the groupers is increased, and the economic benefits of the fresh and alive groupers are increased.

Description

technical field [0001] The invention relates to the technical field of seawater fish keeping alive, in particular to a high-density seawater grouper keeping alive method. Background technique [0002] Pearl gentian grouper is rich in nutrients and tender meat, and is deeply loved by consumers. It is an important and valuable marine aquaculture fish. Because the breeding area is mainly concentrated in the coastal areas, in order to meet the needs of inland consumers, the pearl gentian grouper is mostly stored, transported and sold in the way of keeping water alive. However, the grouper is irritable, and will have a strong stress response due to stimulation in the process of fishing, loading, transportation, etc., and its dorsal fin is full of hard spines. When stimulated by stress, the spines stand erect to attack, resulting in The transport density of fresh grouper is limited, and the stress causes damage to the epidermis, which induces weakened disease resistance, low surv...

Claims

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Application Information

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IPC IPC(8): A01K61/10
CPCA01K61/10Y02A40/81
Inventor 李学鹏温敬敬励建荣王蕾李庆欣丁玉庭谢晶王彦波秦小明
Owner BOHAI UNIV
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