Identification method of fish and vegetable symbiotic fish

Abstract

The invention relates to the technical field of agricultural ecological planting and breeding, and provides a method for identifying fish and vegetable symbiotic fish. The identification method of the fish and vegetable symbiotic fish comprises the following steps: S1, acquiring sample fish, and preparing an identification sample; s2, obtaining measured values of indexes of the identification sample, wherein the indexes comprise earthy substances, pH values and fatty acids; and S3, comparing the measured value of the index with a standard information base, and determining whether the sample fish is a fish-vegetable symbiotic fish or not. According to the method, the defect that people are cheated due to the fact that fish and vegetable symbiotic fishes cannot be identified in the prior art is overcome, the method for identifying the fish and vegetable symbiotic fishes is achieved, people are prevented from being cheated, and meanwhile the normal development order of the fish and vegetable ecological planting and breeding industry is maintained.

Description

Technical Field

[0001] The invention relates to the technical field of agricultural ecological breeding and cultivation, and in particular to a method for identifying fish in aquaponics. Background Art

[0002] As the people's yearning and pursuit for a better life continues to increase, the concept of green ecological development is also constantly strengthened. At present, the people's standards for edible fish on the table are increasing year by year. Safe fish has become the baseline set by contemporary people for edible fish. Fish that grow in a symbiotic relationship have a better growth environment, so their meat is healthier and is deeply loved by everyone.

[0003] There are many types of fish-vegetable symbiosis models commonly seen on the market. It is easy for vegetables to grow poorly in the fish-vegetable symbiotic system. What's worse, non-aquatic and vegetable symbiotic fish may be used to impersonate them, which seriously disrupts the normal development of the fish-vegetable ecological breeding industry.

[0004] Therefore, in order to enable people to distinguish the fish of aquaponics and the quality of the fish of aquaponics, it is urgent to design an identification method of the fish of aquaponics. Summary of the invention

[0005] The present invention provides a method for identifying fish in aquaponics, so as to solve the defect that the prior art cannot identify fish in aquaponics, thus causing people to be deceived, and realizes a method for identifying fish in aquaponics, thereby preventing people from being deceived, and also maintaining the normal development order of the fish-vegetable ecological breeding industry.

[0006] The present invention provides a method for identifying fish in aquaponics, comprising: Obtain sample fish and prepare identification samples; Obtaining index measurement values ​​of the identification sample, wherein the indexes include earthy odor substances, pH value and fatty acids; The measured values ​​of the indicators are compared with a standard information library to determine whether the sample fish is a fish pongee fish.

[0007] According to a method for identifying fish in aquaponics provided by the present invention, the steps of obtaining a sample fish and preparing an identification sample include: Randomly select one fish from the target fish group as the sample fish; The sample fish are transported to the testing site.

[0008] According to the method for identifying aquaponics fish provided by the present invention, the steps of obtaining sample fish and preparing identification samples further include: taking back muscles of the sample fish; The back muscle was prepared as the identification sample.

[0009] According to a method for identifying fish in aquaponics provided by the present invention, the earthy smell substances include geosmin and dimethyl isoborneol.

[0010] According to a method for identifying aquaponic fish provided by the present invention, when the sample fish is sea bass, when the content of geosmin is not higher than 800 ng / kg and the content of dimethyl isoborneol is not higher than 500 ng / kg, the sea bass is aquaponic fish.

[0011] According to a method for identifying aquaponics fish provided by the present invention, the pH value of the seabass in the standard information library is: 6.0-6.6.

[0012] According to a method for identifying fish for aquaponics provided by the present invention, the fatty acids in the fatty acids of the sea bass include myristic acid, palmitic acid, palmitoleic acid, stearic acid, oleic acid, linoleic acid, eicosamonenoic acid, α-linolenic acid, eicosadienoic acid, arachidonic acid, eicosapentaenoic acid, unsaturated fatty acids, monounsaturated fatty acids, and polyunsaturated fatty acids.

[0013] According to a method for identifying a fish-vegetable symbiotic fish provided by the present invention, the contents of the fatty acids of sea bass in the standard information library are as follows: the content of myristic acid is 0.0430 g / 100 g to 0.08595 g / 100 g, the content of palmitic acid is 0.4775 g / 100 g to 0.955 g / 100 g, the content of palmitoleic acid is 0.1247 g / 100 g to 0.2494 g / 100 g, the content of stearic acid is 0.1107 g / 100 g to 0.1813 g / 100 g, the content of oleic acid is 0.7640 g / 100 g to 1.528 g / 100 g, the content of linoleic acid is 0.7743 g / 100 g to 1.5485 g / 100 g, the content of eicosenoic acid is 0.0217 g / 10 The content of α-linolenic acid is 0.0634 g / 100 g to 0.1267 g / 100 g, the content of eicosadienoic acid is 0.0155 g / 100 g to 0.02292 g / 100 g, the content of arachidonic acid is 0.0150 g / 100 g to 0.03005 g / 100 g, the content of eicosapentaenoic acid is 0.0140 g / 100 g to 0.0167 g / 100 g The content of the unsaturated fatty acid is 1.9165g / 100g to 3.833g / 100g, the content of the monounsaturated fatty acid is 1.2130g / 100g to 1.826g / 100g and the content of the polyunsaturated fatty acid is 1.0030g / 100g to 2.006g / 100g.

[0014] According to a method for identifying aquaponics fish provided by the present invention, the sample fish also includes tilapia, carp, silver carp, grass carp, barramundi, catfish, trout, salmon and Murrayfish.

[0015] According to a method for identifying aquaponic fish provided by the present invention, the step of comparing the measured value of the indicator with a standard information library to determine whether the sample fish is an aquaponic fish comprises: Collect and organize the threshold values ​​of the above indicators for each fish in the aquaponics system; Establishing a standard information base according to the threshold value; Removing outliers and missing values ​​from the indicator measurement values ​​to obtain measurement data; The measurement data is compared with the standard information library to determine whether the sample fish is a fish pharmacy fish.

[0016] The identification method of fish-vegetable symbiotic fish provided by the present invention first obtains sample fish and makes identification samples to ensure the authenticity and representativeness of the detection object, which is the basis for subsequent analysis. Then, by measuring the indicators of the identification sample such as earthy smell substances, pH value and fatty acids, the growth environment and health status of the fish can be fully reflected from the perspective of chemical composition. These indicators are closely related to the living habits and ecological environment of the fish, and can effectively distinguish the fish cultured in the fish-vegetable symbiotic environment from the fish in other environments. Finally, the measured values ​​of these indicators are compared with the standard information library, and the existing data resources are used to verify whether the sample fish meets the standards of fish-vegetable symbiosis. Through the above method, not only the efficiency of identification is improved, but also the credibility of the results is enhanced. The whole process combines practical operation with data analysis, which not only ensures technical feasibility, but also meets the market demand for high-quality fish products, helps to promote the healthy development of the fish-vegetable symbiotic industry, while protecting consumer rights and interests and avoiding deception in the market. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a flow chart of the method for identifying fish in aquaponics provided by the present invention. DETAILED DESCRIPTION

[0019] The following embodiments of the present invention are described in further detail in conjunction with the accompanying drawings and examples. The following examples are used to illustrate the present invention, but are not intended to limit the scope of the present invention.

[0020] In the description of the embodiments of the present invention, it should be noted that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limitations on the embodiments of the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0021] In the description of the embodiments of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the embodiments of the present invention can be understood according to specific circumstances.

[0022] In the embodiments of the present invention, unless otherwise clearly specified and limited, the first feature being "above" or "below" the second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0023] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the present invention. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine the different embodiments or examples described in this specification and the features of the different embodiments or examples, without contradiction.

[0024] Fish and vegetable symbiosis is a sustainable agricultural production system that combines aquaculture and hydroponic cultivation. In this system, the excrement of fish is converted into nutrients needed by plants, and the plants absorb these nutrients to purify the water quality, forming a closed-loop ecosystem. The fish raised in the fish and vegetable symbiosis system are called fish and vegetable symbiosis fish. Due to the excellent water quality and ecological balance, the fish in the fish and vegetable symbiosis system have fewer diseases and grow healthily. In addition, in the fish and vegetable symbiosis system, no or less chemical drugs are used, avoiding the problem of drug residues. As a result, the fish in the system have more delicious meat and better taste due to the superior growth environment. And fish can better absorb nutrients under good water quality and sufficient oxygen supply, and the nutrients in the meat are richer. Therefore, fish and vegetable symbiosis fish are deeply loved by everyone, but in reality, it is impossible to effectively identify fish and vegetable symbiosis fish, so people are often deceived in life.

[0025] Combine the following Figure 1 In describing various embodiments of the present invention, it should be noted that the following embodiments are described using sea bass as a sample fish.

[0026] Reference Figure 1 The present invention provides a method for identifying fish in aquaponics, comprising the following steps: S1. Obtain sample fish and prepare identification samples; S2. Obtaining the index measurement values ​​of the identification sample, the indexes include earthy odor substances, pH value and fatty acids; S3. Compare the measured values ​​of the indicators with the standard information database to determine whether the sample fish is a fish-vegetable symbiotic fish.

[0027] In the above method, firstly, by obtaining sample fish and making identification samples, the authenticity and representativeness of the test object are ensured, which is the basis for subsequent analysis. Then, by measuring the indicators of the identification samples such as earthy smell substances, pH value and fatty acids, the growth environment and health status of the fish can be fully reflected from the perspective of chemical composition. These indicators are closely related to the living habits and ecological environment of fish, and can effectively distinguish fish raised in aquaponics from fish in other environments. Finally, the measured values ​​of these indicators are compared with the standard information library, and the existing data resources are used to verify whether the sample fish meets the standards of aquaponics.

[0028] The present invention not only improves the efficiency of identification, but also enhances the credibility of the results. The whole process combines practical operation with data analysis, which not only ensures technical feasibility, but also meets the market demand for high-quality fish products, helps to promote the healthy development of the fish-vegetable symbiosis industry, protects consumer rights and interests, and avoids deception in the market.

[0029] In some possible embodiments, obtaining the sample fish in the step of obtaining the sample fish in step S1 comprises the following steps: S1.1. Randomly select a fish from the target fish school as a sample fish; S1.2. Transport the sample fish to the testing site; S1.3. Take the back muscles of the sampled fish; S1.4, prepare the back muscles as identification samples; Among them, step S1.1 and step S1.2 are for obtaining sample fish in step S1, and step S1.3 and step S1.4 are for preparing identification samples in step S1.

[0030] In step S1.1, a certain number of samples need to be randomly selected from the fish to be identified to ensure that the samples are representative. Specifically, the following steps are included.

[0031] First, a reasonable sampling plan needs to be developed based on the number and distribution of fish to be identified. For example, if the fish to be identified are raised in a large aquaponics system, the possible differences in environmental factors such as water quality and light in different locations should be taken into account, so that samples can be randomly selected from different areas of the system to ensure that fish in each area have a chance to be selected, which can reduce bias caused by geographical location.

[0032] Secondly, when selecting specific samples, we should try to ensure the diversity of samples, that is, select fish of different sizes and different growth stages as samples, because the growth stage of fish will affect the chemical composition of its body, such as fatty acid content and pH value, etc. This can more comprehensively evaluate the overall health and growth status of fish in the aquaponics system, and then determine whether the fish in the system are newly released other fish to impersonate farmed aquaponics fish.

[0033] In addition, the larger the sample size, the better, because the larger the sample size, the higher the accuracy of the result, but at the same time, the cost and feasibility of practical operation must also be considered. Therefore, a reasonable minimum sample size can be calculated based on statistical principles. This process can be completed with the help of professional statistical software to ensure that the sample size can meet the research needs and can be controlled within an acceptable cost range. I will not go into details here.

[0034] Finally, in the actual sampling process, operators should follow standardized operating procedures and use unified tools and methods to reduce errors caused by human factors. For example, when catching fish, it is necessary to minimize the damage to the fish to avoid physiological changes caused by stress or injury affecting subsequent index measurements. At the same time, samples should be processed or stored immediately after collection to prevent sample deterioration due to a long period of time, which will affect the final identification results.

[0035] In step S1.2, after the sample fish is obtained, it is transported alive to the testing site by oxygenation and packaging, where the testing site can be a laboratory. In this step, oxygenation and packaging can ensure that the fish obtain sufficient oxygen supply during transportation, maintain their life activities, and reduce death or changes in physiological state caused by lack of oxygen. At the same time, it also avoids the death of fish during transportation due to the influence of changes in the chemical composition of their bodies (such as protein decomposition, pH drop, etc.) on the test results. It should be noted that if the testing site is not far from the place where the sample fish is obtained, conventional transportation can be carried out directly.

[0036] Step S1.3 includes the following steps: S1.3.1. Preparation for dissection includes tool preparation, environment preparation and sample fish preparation. Specifically, tool preparation includes: preparing sharp scalpels, scissors, tweezers, trays, weighing machines, plastic wrap or sealed bags and other tools and materials. Environment preparation includes: choosing a clean and tidy workbench to ensure that the operation area is free of contamination. Sample fish preparation includes: taking the sample fish out of the oxygenated container and placing it on the workbench to ensure that the surface of the fish body is dry for easy operation.

[0037] It should be noted that all dissection tools should be thoroughly cleaned and disinfected before use to avoid cross contamination and ensure the purity of the sample. The operation area should be kept clean to prevent dust, impurities and other contaminants from contacting the sample. Operators should wear disposable gloves to avoid direct contact with the sample with their hands.

[0038] S1.3.2. Fix the sample fish: Place the sample fish flat on the workbench and gently fix the fish body with a wet cloth or a special fixing device to prevent it from moving during the operation.

[0039] S1.3.3. Skinning, including incision positioning and skin peeling. Specifically, incision positioning includes: starting from the tail of the fish, making parallel incisions along both sides of the spine. The depth of the incision should be limited to the skin layer to avoid cutting into muscle tissue. Skin peeling includes: using a scalpel or tweezers, gently peeling the skin from the incision, gradually advancing along both sides of the spine toward the head until the skin on both sides of the back is completely removed. It should be noted that during the operation, the hands should be kept stable and the movements should be gentle to avoid damaging muscle tissue.

[0040] S1.3.4. Remove the back muscle: After the skin is removed, carefully cut a piece of complete back muscle along the muscle edges on both sides of the spine with a scalpel. The muscle piece cut should include the muscles on both sides of the spine and be about 1 / 3 to 1 / 2 of the length of the fish body.

[0041] S1.3.5. Separate the muscles: Use a scalpel and forceps to completely separate the excised muscle blocks from the fish body, ensuring the integrity of the muscle blocks.

[0042] S1.3.6. Processing and preservation, including weighing, packaging and storage. Specifically, weighing includes: placing the removed muscle pieces on a scale and recording their weight. Packaging includes: placing the muscle pieces in plastic wrap or a sealed bag, and marking the sample number, sampling date and time, etc. Storage includes: placing the packaged muscle pieces in a refrigerator or ice box, keeping them at a low temperature to ensure their freshness.

[0043] In step S1.4, the back muscles are ground into porridge-like minced meat at low temperature to prepare an identification sample.

[0044] In some possible embodiments, the earthy smell substances in step S2 include geosmin and dimethyl isoborneol. Geosmin and dimethyl isoborneol are two common compounds produced by algae and actinomycetes. When they exist in water, they will cause water and fish to produce unpleasant earthy smells. Detecting the concentration of these two compounds is crucial for evaluating the quality of fish in aquaponics systems. Detection of geosmin and dimethyl isoborneol includes: S2.1 Obtain test samples; S2.2, extracting geosmin or dimethyl isoborneol; S2.3, purifying the extract in step S2.2; S2.4. Analyze the extract in step S2.3.

[0045] Step S2.1 includes: S2.1.1. Sample weighing: Take a certain amount of minced meat, weigh it with a balance and record the weight; S2.1.2. Sample dilution: Place the weighed minced meat into a centrifuge tube, add an appropriate amount of deionized water, and mix thoroughly using a homogenizer.

[0046] Step S2.2 includes: S2.2.1. Determine the extraction solvent: Select a suitable organic solvent for extraction, such as ethyl acetate, dichloromethane, etc. S2.2.2. Extraction: Transfer the mixed meat suspension to a separatory funnel, add an equal volume of extraction solvent, shake and mix for 10 minutes, and let stand to separate the layers. Collect the organic phase, repeat the extraction 2-3 times, and combine the organic phases; S2.2.3. Concentration: Transfer the combined organic phase to a rotary evaporator and concentrate under reduced pressure to near dryness to obtain a concentrated extract.

[0047] Step S2.3 includes: S2.3.1, Solid Phase Extraction (SPE): Use solid phase extraction columns (such as C18 or silica gel columns) to further purify the extract and remove impurities; S2.3.2. Activate the column: Activate the SPE column with methanol and water in sequence; S2.3.3, Sample loading: Dissolve the concentrated extract in a small amount of methanol and slowly add it to the SPE column; S2.3.4, Elution: Elute the target compound with methanol or a methanol-water mixture and collect the eluate; S2.3.5. Concentration: Concentrate the eluate again until it is nearly dry, and make up the volume with an appropriate amount of solvent (such as methanol or ethyl acetate) to obtain the final extract.

[0048] In some embodiments of the present invention, the individual fatty acids in the fatty acid class include myristic acid, palmitic acid, palmitoleic acid, stearic acid, oleic acid, linoleic acid, eicosone acid, α-linolenic acid, eicosadienoic acid, arachidonic acid, eicosapentaenoic acid, unsaturated fatty acids, monounsaturated fatty acids, and polyunsaturated fatty acids.

[0049] In some embodiments of the present invention, the sample fish also includes tilapia, carp, silver carp, grass carp, barramundi, catfish, trout, salmon and Murrayfish.

[0050] In some embodiments where the sample fish is sea bass, step S3 comprises: S3.1. Collect and organize the threshold values ​​of various indicators of sea bass in the aquaponics system; specifically, the threshold values ​​of each indicator are as follows: The content of geosmin is not higher than 800ng / kg, the content of dimethyl isoborneol is not higher than 500ng / kg, the pH value is: 6.0-6.6, the content of myristic acid is 0.0430g / 100g-0.08595g / 100g, the content of palmitic acid is 0.4775g / 100g-0.955g / 100g, and the content of palmitoleic acid is 0.1247g / 100g~0.2494g / 100g, the content of stearic acid is 0.1107g / 100g~0.1813g / 100g, the content of oleic acid is 0.7640g / 100g~1.528g / 100g, the content of linoleic acid is 0.7743g / 100g~1.5485g / 100g, and the content of eicosapentaenoic acid is 0.0217g / 1 00g~0.04335g / 100g, α-linolenic acid content is 0.0634g / 100g~0.1267g / 100g, eicosadienoic acid content is 0.0155 / 100g~0.02292g / 100g, arachidonic acid content is 0.0150g / 100g~0.03005g / 100g, eicosapentaenoic acid content is 0.0254g / 100g~0.0348g / 100g, unsaturated fatty acid content is 1.9165g / 100g~3.833g / 100g, monounsaturated fatty acid content is 1.2130g / 100g~1.826g / 100g and polyunsaturated fatty acid content is 1.0030g / 100g~2.006g / 100g; S3.2. Establish a standard information base for sea bass based on the above thresholds; S3.3. Remove outliers and missing values ​​from the indicator measurement values ​​to obtain measurement data; S3.4. Compare the measurement data with the standard information database to determine whether the sample fish is a fish that is grown in aquaponics.

[0051] Specifically, when the content of geosmin is not higher than 800ng / kg and the content of dimethyl isoborneol is not higher than 500ng / kg, the sample fish is a fish-vegetable symbiotic fish. It should be noted that in order to avoid errors in the content of geosmin and dimethyl isoborneol, or the influence of other factors, resulting in inaccurate results, the pH value of the identification sample can be further measured as verification. After the content of geosmin and dimethyl isoborneol meets the requirements, the pH also meets the requirements and the verification is passed. If the pH does not meet the requirements after the content of geosmin and dimethyl isoborneol meets the requirements, the content of geosmin and dimethyl isoborneol needs to be secondary tested until both meet the requirements.

[0052] The role of measuring the content of each fatty acid in the fatty acid class is the same as that of measuring the pH value, and both are used to verify the measurement results of geosmin and dimethylisoborneol content. The verification method can refer to the verification method of the pH value, which will not be repeated here.

[0053] Specific examples of sea bass identification are provided below.

[0054] In this embodiment, three types of characteristic indicators of the back muscles of three batches of aquaponics seabass and pond seabass were continuously detected, which were earthy smell substances, pH value, and fatty acids.

[0055] The specific contents of geosmin and dimethylisoborneol (ng / kg) in the muscles of three batches of aquaponics seabass and pond seabass are shown in Table 1: Table 1

[0056] The pH values ​​of the muscles of three batches of aquaponics seabass and pond seabass after being slaughtered can be found in Table 2 (the time here indicates the time after the seabass was slaughtered): Table 2

[0057] The content of various fatty acids in the muscles of three batches of aquaponics seabass and pond seabass (g / 100g) can be found in Table 3: Table 3

[0058] From the above results, it can be seen that this method can effectively identify the difference between the aquaponic perch and the common pond perch. For the determination of other fish in the aquaponic fish, the above perch determination method can be referred to.

[0059] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A method for identifying fish in aquaponics, characterized in that: include: Obtain sample fish and prepare identification samples; Obtaining index measurement values ​​of the identification sample, wherein the indexes include earthy odor substances, pH value and fatty acids; The measured values ​​of the indicators are compared with a standard information library to determine whether the sample fish is a fish pongee fish.

2. The method for identifying fish in aquaponics according to claim 1, characterized in that: The steps of obtaining sample fish and preparing identification samples include: Randomly select one fish from the target fish group as the sample fish; The sample fish are transported to the testing site.

3. The method for identifying fish in aquaponics according to claim 2, characterized in that: The steps of obtaining sample fish and preparing identification samples also include: taking back muscles of the sample fish; The back muscle was prepared as the identification sample.

4. The method for identifying fish in aquaponics according to claim 1, characterized in that: The earthy smell substances include geosmin and dimethyl isoborneol.

5. The method for identifying fish in aquaponics according to claim 4, characterized in that: When the sample fish is sea bass, when the content of geosmin is not higher than 800 ng / kg and the content of dimethyl isoborneol is not higher than 500 ng / kg, the sea bass is a fish for aquaponics.

6. The method for identifying fish in aquaponics according to claim 5, characterized in that: The pH value of the sea bass in the standard information library is: 6.0-6.

6.

7. The method for identifying fish in aquaponics according to claim 6, characterized in that: The fatty acids in the fatty acids of the sea bass include myristic acid, palmitic acid, palmitoleic acid, stearic acid, oleic acid, linoleic acid, eicosonenoic acid, α-linolenic acid, eicosadienoic acid, arachidonic acid, eicosapentaenoic acid, unsaturated fatty acids, monounsaturated fatty acids, and polyunsaturated fatty acids.

8. The method for identifying fish in aquaponics according to claim 7, characterized in that: The contents of the fatty acids in sea bass in the standard information database are as follows: the content of myristic acid is 0.0430g / 100g to 0.08595g / 100g, the content of palmitic acid is 0.4775g / 100g to 0.955g / 100g, the content of palmitoleic acid is 0.1247g / 100g to 0.2494g / 100g, the content of stearic acid is 0.1107g / 100g to 0.1813g / 100g, the content of oleic acid is 0.7640g / 100g to 1.528g / 100g, the content of linoleic acid is 0.7743g / 100g to 1.5485g / 100g, and the content of eicosenoic acid is 0.0217g / 100g to 0.04335g / 100g, the content of α-linolenic acid is 0.0634g / 100g~0.1267g / 100g, the content of eicosadienoic acid is 0.0155 / 100g~0.02292g / 100g, the content of arachidonic acid is 0.0150g / 100g~0.03005g / 100g, the content of eicosapentaenoic acid is 0.0254g / 100g~0.0348g / 100g, the content of unsaturated fatty acids is 1.9165g / 100g~3.833g / 100g, the content of monounsaturated fatty acids is 1.2130g / 100g~1.826g / 100g and the content of polyunsaturated fatty acids is 1.0030g / 100g~2.006g / 100g.

9. The method for identifying fish for aquaponics according to any one of claims 1 to 8, characterized in that: The sample fish also include tilapia, carp, silver carp, grass carp, barramundi, catfish, trout, salmon and Murrayfish.

10. The method for identifying fish for aquaponics according to any one of claims 1 to 4, characterized in that: The step of comparing the measured value of the indicator with the standard information library to determine whether the sample fish is a fish-vegetable symbiotic fish comprises: Collect and organize the threshold values ​​of the above indicators for each fish in the aquaponics system; Establishing a standard information base according to the threshold value; Removing outliers and missing values ​​from the indicator measurement values ​​to obtain measurement data; The measurement data is compared with the standard information library to determine whether the sample fish is a fish pharmacy fish.

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