Modified atmosphere keep-alive method of pearl gentian grouper

A technology for pearl gentian and grouper, which is applied in fish farming, climate change adaptation, application and other directions, can solve the problems of easy deterioration of fish body quality, easy to pierce each other, high transportation cost, and reduce the discharge of metabolic waste. , The effect of improving the carrying capacity and high survival rate

Inactive Publication Date: 2021-08-17
GUANGDONG OCEAN UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Pearl gentian grouper has the advantages of fast growth, strong disease resistance, high collagen egg content, and fine meat fiber. It has high market value and consumer demand, and has a high market circulation rate. However, due to the limitations of the distribution area, it is difficult to meet The actual demand, and its irritable personality, with spikes on the back and abdomen, the conventional transportation of water preservation is accompanied by the disadvantages of low transportation density, high transportation cost, low survival rate, and easy deterioration of fish quality. Environmental factors during transportation such as Changes in ammonia nitrogen, temperature, and dissolved oxygen will cause them to have a stress response, struggling violently and easily stabbing each other. Therefore, the research on the technology of water-free transportation of pearl gentian grouper is particularly important. Water-free transportation of fish is the key A low-cost, high survival rate, high-quality, high-safety, and long-term green and environmentally friendly transportation method has the advantages of large transportation volume and small physical damage

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] (1) Select pearl gentian grouper with uniform size, good vitality, no damage to the body surface, and healthy and disease-free;

[0020] (2) Using freshly filtered seawater with a salinity of 20%, a water temperature of 21°C, a dissolved oxygen of 6.5 mg / L, a pH of 6.7, and a fish density of 85g / L, the pearl gentian grouper was kept without food for 24 hours;

[0021] (3) The pearl gentian grouper lowered the water temperature from 22°C to 12°C with a cooling program of 26°C, 3°C / h, 20°C, 2°C / h, 15°C, 1°C / h before controlled atmosphere preservation , kept for 1 hour, so that the fish basically lost its balance, turned over, had no obvious response to external stimuli, and the frequency of gill cover opening and closing was stable, and entered a dormant state;

[0022] (4) Wrap the dormant pearl gentian grouper with a sponge soaked in seawater at 15°C in advance, put it into an ordinary PE bag for inflatable packaging according to O2:N2=85:15, and carry out anaerobic tre...

Embodiment 2

[0025] (1) Select pearl gentian grouper with uniform size, good vitality, no damage to the body surface, and healthy and disease-free;

[0026] (2) Using freshly filtered seawater with a salinity of 21%, a water temperature of 22°C, a dissolved oxygen of 7 mg / L, a pH of 7, and a fish density of 85 g / L, the pearl gentian grouper was kept without food for 28 hours;

[0027] (3) The pearl gentian grouper lowered the water temperature from 23°C to 13°C with a cooling program of 25°C, 3°C / h, 19°C, 2°C / h, 14°C, 1°C / h before controlled atmosphere preservation , kept for 0.5 h, so that the fish basically lost its balance, turned over, had no obvious response to external stimuli, and the opening and closing frequency of the gill cover was stable, entering a dormant state;

[0028] (4) Wrap the dormant pearl gentian grouper with a sponge soaked in seawater at 15°C in advance, put it into an ordinary PE bag for inflatable packaging according to O2:N2=85:15, and carry out anaerobic treatm...

Embodiment 3

[0031] (1) Select pearl gentian grouper with uniform size, good vitality, no damage to the body surface, and healthy and disease-free;

[0032] (2) Using freshly filtered seawater with a salinity of 22%, a water temperature of 23°C, a dissolved oxygen of 7.5 mg / L, a pH of 7.3, and a fish density of 85g / L, the pearl gentian grouper was kept without food for 32 hours;

[0033] (3) Pearl gentian grouper lowered the water temperature from 22 to 23 ℃ to 12-14°C, kept for 0.6 h, the fish basically lost its balance, the body turned over, no obvious response to external stimuli, the opening and closing frequency of the gill cover was stable, and it entered a dormant state;

[0034] (4) Wrap the dormant pearl gentian grouper with a sponge soaked in seawater at 15°C in advance, put it into an ordinary PE bag for inflatable packaging according to O2:N2=85:15, and carry out anaerobic treatment at 15°C. water preservation;

[0035] (5) After keeping alive without water, move the pearl ge...

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PUM

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Abstract

The invention discloses a modified atmosphere keep-alive method of pearl gentian grouper. The method is characterized by specifically comprising the following steps: before the pearl gentian grouper is kept alive through modified atmosphere, feed deprivation is conducted, and the pearl gentian grouper is temporarily cultured for 24-48 hours; before the pearl gentian grouper is kept alive through modified atmosphere, the water temperature is reduced from 22-24 DEG C to 12-14 DEG C, and the pearl gentian grouper is temporarily cultured for 0.5-1 h until the pearl gentian grouper is in a dormant state; the dormant pearl gentian grouper is wrapped with wet sponge, the wrapped pearl gentian grouper is put into a common PE (polyethylene) bag for gas-filled packaging, and the pearl gentian grouper is kept alive without water under the condition of 15 DEG C; and after the pearl gentian grouper is kept alive without water, the pearl gentian grouper is transferred into a water environment. The modified atmosphere keep-alive method of the pearl gentian grouper is safe, efficient, low in cost, high in quality and high in survival rate, improves the carrying capacity to a large extent, has no influence on fish body health, has great economic benefits, reduces discharge of metabolic waste in the transportation process of the pearl gentian grouper, relieves stress response of fish bodies caused by fishing and reduces the respiratory metabolism frequency, thereby prolonging the survival time.

Description

technical field [0001] The invention relates to the technical field of keeping alive aquatic products, in particular to a method for keeping alive pearl gentian grouper through controlled atmosphere. Background technique [0002] Pearl gentian grouper, also known as dragon tiger grouper or pearl grouper, is a new hybrid species of grouper produced through artificial breeding. [0003] Pearl gentian grouper has the advantages of fast growth, strong disease resistance, high collagen egg content, and fine meat fiber. It has high market value and consumer demand, and a high market circulation rate. However, due to the limitations of the distribution area, it is difficult to meet The actual demand, and its irritable personality, with spikes on the back and abdomen, the conventional transportation of water preservation is accompanied by the disadvantages of low transportation density, high transportation cost, low survival rate, and easy deterioration of fish quality. Environmenta...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): A01K63/02A01K61/10
CPCA01K63/02A01K61/10Y02A40/81
Inventor 黄和黄湘湄陆泽峰秦小明
Owner GUANGDONG OCEAN UNIVERSITY
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