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Flounder-otolith-element marking method

A marking method and technology for flounder, which are applied in fish farming, additional food elements, animal feed, etc., can solve the problems of low retention rate, large damage to fish body, influence on survival rate of marked fish, etc. The effect of low lethality

Active Publication Date: 2017-10-20
YELLOW SEA FISHERIES RES INST CHINESE ACAD OF FISHERIES SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It avoids the disadvantages of other marking methods, such as greater damage to the fish body, high mark loss rate, expensive mark, low retention rate, limited number of marks, etc.
However, the defect of the marking method in the above-mentioned technology is that the survival rate of the marker fish is seriously affected when the concentration is high, and the highest concentration will cause all the marker fish to die.

Method used

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  • Flounder-otolith-element marking method

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Experimental program
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specific Embodiment approach

[0021] A specific embodiment of a method for marking otolith elements of flounder fish of the present invention comprises the following steps:

[0022] (1) Mix strontium chloride hexahydrate evenly with fish feed, so that the fish feed contains strontium element, and obtain marked feed;

[0023] (2) using the marked feed to feed the flounder to be marked;

[0024] (3) Feed the marked feed 1-2 times a day for at least 3 days;

[0025] (4) The content of strontium chloride hexahydrate should account for at least 0.8% of the total mass of the marked feed.

[0026] Preferably, in the step (3), the marked feed is fed twice a day, and the feeding time is 4-10 days; in the step (4), the content of strontium chloride hexahydrate accounts for 1%-10%.

[0027] Below are 3 specific embodiments of the present invention:

Embodiment 1

[0029] (1) Make marked feed: Fish feed is made of pellet feed, with bio-alginate as the binder, and 1kg of pellet feed uses 10-15g of bio-alginate. Dissolve 8g of strontium chloride hexahydrate and 10-15g of bio-algae in 100ml of pure water, mix well, pour into a watering can, evenly spray on 1kg of pellet feed, and dry at room temperature for 24 hours. The pellet feed used in the experiment is Dongwan feed, and the specifications are C0-C3;

[0030] (2) Use marked feed to feed the flounder to be marked, and ensure that there is no residual bait;

[0031] (3) Feed the marked feed once at 8:00 am and 2:00 pm every day (or only feed the marked feed once at 6:00 am every day), and the amount of single feeding is 2%-3% of the total weight of the fish Feeding, feeding time is 10 days; the initial average weight of the experimental flounder fish is 2.64g, and the average weight after 30 days of recovery is 10.89g;

[0032] (4) The content of strontium chloride hexahydrate accounts...

Embodiment 2

[0035] (1) Make marked feed: Fish feed is made of pellet feed, with bio-alginate as the binder, and 1kg of pellet feed uses 10-15g of bio-alginate. Dissolve 32g of strontium chloride hexahydrate and 10-15g of bio-algae in 100ml of pure water, mix well, pour into a watering can, evenly spray on 1kg of pellet feed, and dry at room temperature for 24 hours. The pellet feed used in the experiment is Dongwan feed, and the specifications are C0-C3;

[0036] (2) Use marked feed to feed the flounder to be marked, and ensure that there is no residual bait;

[0037] (3) Feed the marked feed once every day at 8:00 am and 2:00 pm. The single feeding amount is 2%-3% of the total fish body weight, and the feeding time is 3 days; the initial average weight of the experimental flounder fish is 2.51g, and the average weight after 30 days of recovery is 10.01g;

[0038] (4) The content of strontium chloride hexahydrate accounts for 3.2% of the total mass of the marked feed;

[0039] (5) Use ...

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Abstract

The invention provides a flounder-otolith-element marking method. The flounder-otolith-element marking method is characterized by including the following steps that (1) strontium chloride hexahydrate and fish feed are mixed to be even, a strontium element is contained in the fish feed, and marked feed is obtained; (2) to-be-marked flounders are fed with the marked feed; (3) the flounders are fed with the marked feed for 1 time to 2 times every day, and feeding time is at least 3 days; (4) the content of the strontium chloride hexahydrate at least accounts for 0.8% of the whole mass of the marked feed. The strontium element can be precipitated on a growth ring of otolith through the physiological process such as blood transmission, an element annule is formed, and the fingerprint marker effect of releasing a flounder otolith element is generated; the fingerprint marker stability of the otolith strontium element is good, is not influenced by the outside, and can be preserved permanently; the strontium chloride hexahydrate are harmless to to-be-marked fishes, and both the fatality rate of the high concentration and the fatality rate of the low concentration are quite low.

Description

technical field [0001] The invention belongs to the technical field of release marks, and relates to a marking method for flounder fish, in particular to a marking method for otolith elements of flounder fish. Background technique [0002] Flounder is the only flounder fish of the flounder family distributed along the coast of Asia. Because of its large size, fast growth speed and delicious taste, it is an important marine economic flounder fish in East Asian countries. Its migration distance is short, and it is one of the main species of seawater flounder in East Asian countries. The breeding and release of flounder in my country is mainly in Shandong, Hebei, Liaoning, Tianjin and other provinces and cities. In 2016, the number of flounder released through public bidding in Liaoning Province alone was 8.13 million. In the past 20 years, my country has done a lot of research and work on the breeding biology of flounder, seedling breeding and multiplication and release, and ...

Claims

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Application Information

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IPC IPC(8): A01K61/95A23K50/80A23K20/24A23K20/163
CPCA01K61/95A23K20/163A23K20/24A23K50/80
Inventor 王俊司飞于清海李忠义王青林宋立民赵雅贤孙坚强
Owner YELLOW SEA FISHERIES RES INST CHINESE ACAD OF FISHERIES SCI
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