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A kind of preservation method of wild large yellow croaker

A large yellow croaker and wild technology, which is applied to the field of keeping the wild large yellow croaker, can solve the problems of infection, easy shedding, and the survival rate of the wild large yellow croaker is less than 10%, and achieves the effect of reducing secondary infection and improving the survival rate.

Active Publication Date: 2021-02-26
宁德市鼎诚水产有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The scales on the body surface of large yellow croaker are not tight and are easy to fall off. During the fishing process, it is easy to cause damage to the body surface, resulting in infection and death during the process of keeping alive.
Due to the above reasons, the survival rate of the wild large yellow croaker kept alive by the current method is less than 10%.

Method used

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  • A kind of preservation method of wild large yellow croaker
  • A kind of preservation method of wild large yellow croaker
  • A kind of preservation method of wild large yellow croaker

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0046] Step 1, making the preservation box: the preservation box includes a circular barrel body 1, the diameter of the barrel body 1 is 1m, and the height is 1.5m. A barrel cover 2 is connected above the barrel body 1, and the barrel cover 2 is semicircular. Described bung 2 is provided with intake valve 3, exhaust valve 4 and barometer 5, and wherein, intake valve 3 is docked with oxygen bottle, and exhaust valve 4 is used for renewing the oxygen in the preservation box, and barometer 5 Can display the air pressure in the preservation box, the barrel body 1 and the barrel cover 2 are connected by a screw lock 6; the joints of the barrel body 1 and the barrel cover 2 are provided with a sealing ring 7, which can prevent the gas in the box from overflowing ;

[0047] Bring the survival box to the fishing boat, measure the salinity of the seawater in the fishing area with a salinity meter, prepare clean seawater with the same salinity as the seawater with seawater essence and p...

Embodiment 2

[0055] Step 1, with embodiment 1.

[0056] Step 2. Use 4 survival boxes to select 45 wild large yellow croakers with good vigor and no obvious mechanical injuries on the fishing boat to keep them alive. The salinity of the keep-alive sea area is 26, and artificial seawater of the same concentration is prepared with sea crystals and pure water purified by a pure water machine as water for the keep-alive tank. Add 5pp penicillin and 3pp streptomycin in the preservation box. 45 wild large yellow croakers with a weight of 52.8-187.2g are caught at first, with a weight of 50-200g; 10-13 fish are placed in each survival box. The water depth of the fishing place is about 12 meters; the calculation formula of the air pressure lift value is calculated according to the formula (a); use oxygen and adjust the air pressure in the survival box to 222915Pa. According to the formula (b), open the exhaust valve every half hour to lower the air pressure by 7600Pa, and add some fresh oxygen th...

Embodiment 4

[0058] Example 4. Preparation of immune enhanced agent: Immune reinforcement agent uses prince ginseng withdrawal, and its extraction method is to dry the prince's ginseng medicinal materials. Mesh sieve, mix heterophylla heterophylla powder and water at a weight ratio of 1:10, soak for 24 hours, stir and shake during this period, cover the container, heat to 90°C, and keep it for 2 hours, let the container stand still, cool, take The supernatant and the residual liquid are filtered to remove the residue, and the volume is adjusted to the original water volume, which is the extract of Pseudostellaria heterophylla, and the immune enhancer is prepared;

[0059] Step 5, add immunopotentiator: take by weighing the immunopotentiator of 4% of feed weight, spray on the feed evenly with spray bottle; Start throwing something and feed the feed that has been sprayed with immunopotentiator the next day, some fish ingest, the third At the beginning of the day, most fish began to catch. F...

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Abstract

The invention discloses a method for keeping alive wild yellow croaker, comprising the following steps: making a keep alive box, after catching the wild yellow croaker, selecting the ones with better vigor and putting them into a barrel body, and increasing the air pressure in the keeping box, After that, the air pressure in the survival box was gradually reduced; indoor cultivation was temporarily maintained; immune enhancer was prepared; immune enhancer was weighed and evenly sprayed on the feed with a spray bottle; The invention improves the survival rate of keeping alive wild large yellow croaker.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to a method for keeping wild large yellow croakers alive. Background technique [0002] Large yellow croaker belongs to the order Perciformes, Totoabaidae, and yellow croaker. It is a unique endemic seawater fish in my country. Large yellow croaker used to be the first of my country's "four sea fishes", but the germplasm resources declined due to excessive fishing and overfishing. Keeping wild large yellow croakers alive is an important preliminary work for breeding large yellow croaker original species and increasing release. Because the large yellow croaker is a migratory fish in the middle and lower water layers, because it lives in the water layer below 10 meters deep for a long time, it is easy to swell and die due to the huge change of external pressure after being caught on the water surface, so there is a large yellow croaker. The saying "out of water is de...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K61/10A01K61/13
CPCA01K61/10A01K61/13Y02A40/81
Inventor 黄伟卿张艺林培华陈仕玺刘铮陈雨婧刘家富
Owner 宁德市鼎诚水产有限公司
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