An evaluation method for the feeding attractant effect of aquatic animal feed raw materials and a feeding attractant device

Abstract

The present invention discloses a method for evaluating the feeding attractant effect of aquatic animal feed raw materials and a feeding attractant device. The evaluation method includes the following steps: (1) preparing evaluation baits; (2) preparing control baits; (3) temporarily raising experimental animals in the feeding attractant device; (4) after a period of time, gathering the experimental animals in the concentration area of the feeding attractant device; (5) taking appropriate amounts of the evaluation baits and the control baits and placing them in different feeding attractant areas of the feeding attractant device respectively; (6) releasing the experimental animals in the concentration area of the feeding attractant device; (7) counting the number of times the experimental animals enter each feeding attractant area and the bait consumption in each of the feeding attractant areas within a period of time; (8) calculating the feeding attractant index according to the statistical data; (9) evaluating the feeding attractant effect of the feeding attractant bait according to the feeding attractant index. Compared with the prior art, the calculation of the feeding attractant index of the present invention comprehensively considers two factors, namely the feed intake of the experimental animals and the frequency of approaching the bait, and can effectively improve the evaluation effect of the feeding attractant property of feed raw materials or feeding attractants.

Description

Technical Field

[0001] The present invention relates to the technical field of attractants for aquatic animals, and particularly to a method for evaluating the attractant effect of feed raw materials for aquatic animals and an attractant device. Background Art

[0002] Due to the influence of the composition of nutritional components, storage, and processing technology of different feed raw materials, different attractant effects will be produced on aquatic animals, especially crustaceans. To promote the nutritional expression of feed and improve the efficiency of aquaculture, for different feed raw materials, it is necessary to evaluate their attractiveness to guide the preparation and production of high-efficiency feed, so as to achieve the purposes of increasing the appetite of aquaculture animals, shortening the time for fish to approach food, increasing the food intake of aquatic animals, and reducing the pollution of feed to water bodies.

[0003] At present, the evaluation of the attractiveness of feed raw materials is mainly carried out by conducting attractant experiments and calculating the attractant index of feed raw materials. However, the calculation of the attractant index in traditional attractant experiments only considers the food intake of experimental animals, and its evaluation effect is relatively average. At the same time, the accompanying equipment for traditional attractant experiments is relatively expensive, and it is difficult for general laboratories to meet its experimental conditions, so its practicability is relatively low. Summary of the Invention

[0004] The purpose of the present invention is to provide a method for evaluating the attractant effect of feed raw materials for aquatic animals and an attractant device, aiming at the deficiencies existing in the above-mentioned prior art. The calculation of its attractant index comprehensively considers two factors: the food intake of experimental animals and the frequency of approaching bait, which can effectively improve the evaluation effect of the attractiveness of feed raw materials or attractants.

[0005] To achieve the above purpose, the present invention adopts the following technical solutions:

[0006] In the first aspect, the present invention provides a method for evaluating the attractant effect of feed raw materials for aquatic animals, including the following steps:

[0007] Take an appropriate amount of evaluation feed and a pure diet and make them into granular evaluation bait according to a set ratio;

[0008] Take an appropriate amount of control feed and a pure diet and make them into granular control bait, and the shape and size of the control bait are the same as those of the evaluation bait;

[0009] Select a number of experimental animals with uniform body size and good health and place them in the attractant device for temporary cultivation;

[0010] Gather all the experimental animals in the concentration area of the attractant device and install detachable partitions at the open ends of each attractant tank of the attractant device, and clean the residual feces in each attractant tank;

[0011] Take a certain number of the evaluation baits and the control baits with the same quantity and place them in different bait-attracting areas of the bait-attracting device respectively;

[0012] After a period of time, remove the detachable partitions at the open ends of each bait-attracting trough, and count the number of times the experimental animals enter each bait-attracting area and the bait consumption in each bait-attracting area within a set time;

[0013] Set the bait-attracting index of the control bait to 1, and calculate the bait-attracting index of the evaluation bait according to the number of times the experimental animals enter each bait-attracting area and the bait consumption in each bait-attracting area. The formula for calculating the bait-attracting index is as follows:

[0014]

[0015] In the formula: A is the bait-attracting index;

[0016] d1 = consumption of evaluation bait / (consumption of control bait + consumption of evaluation bait);

[0017] d2 = number of times entering the bait-attracting area where the evaluation bait is located / (number of times entering the bait-attracting area where the evaluation bait is located + number of times entering the bait-attracting area where the control bait is located);

[0018] dDZ = 0.25;

[0019] Evaluate the bait-attracting effect of the evaluation feed according to the bait-attracting index. The larger the bait-attracting index, the better the bait-attracting effect of the evaluation feed.

[0020] Preferably, take an appropriate amount of evaluation feed and the pure diet and make them into granular evaluation baits according to a set ratio, including: take an appropriate amount of evaluation feed and the pure diet, mix them evenly at a ratio of 1:1, granulate them, and then pass through a 12-16 mesh sieve to obtain granular evaluation baits with uniform size.

[0021] Preferably, take an appropriate amount of control feed and the pure diet and make them into granular control baits according to a set ratio, including: take an appropriate amount of control feed and the pure diet, mix them evenly at a ratio of 1:1, granulate them, and then pass through a 12-16 mesh sieve to obtain granular control baits with uniform size.

[0022] Preferably, the evaluation feed includes multiple types of feed raw materials with the same type. After making different evaluation baits from multiple feed raw materials respectively, place them in different bait-attracting areas of the bait-attracting device. The control feed includes a control feed corresponding to the type of feed raw material. After making the control bait from the control feed, place it in one bait-attracting area of the bait-attracting device. When calculating the bait-attracting index of different feed raw materials, use the control feed as the control for calculation respectively.

[0023] Preferably, the evaluation feed includes a variety of different types of feed raw materials. After the various feed raw materials are made into different evaluation baits respectively, they are placed in different feeding areas of the feeding attraction device. The control feed includes a variety of control feeds corresponding to the types of the feed raw materials. After the various control feeds are made into different control baits respectively, they are placed in different feeding areas of the feeding attraction device. When calculating the feeding attraction index of different types of feed raw materials, the control feed corresponding to the type is selected as the control according to the type of the feed raw material for calculation.

[0024] Preferably, the various control feeds include fish meal, soybean meal and wheat. The fish meal is used as the control for the evaluation feed of animal protein type, the soybean meal is used as the control for the evaluation feed of plant protein type, and the wheat is used as the control for the evaluation feed of energy type.

[0025] In a second aspect, the present invention provides a feeding attraction device for the evaluation method of the feeding attraction effect of aquatic animal feed raw materials as described in the first aspect above, including a bottom plate and a number of feeding attraction troughs. One end of the feeding attraction trough has an opening, and a detachable partition is arranged at the opening. There is a feeding area near the other end of the feeding attraction trough. The open ends of the number of feeding attraction troughs are circumferentially arranged around the bottom plate and cooperate with the center of the bottom plate to form a concentrated area. The feeding area is separated from the concentrated area by the detachable partition (13).

[0026] Preferably, the number of the feeding attraction troughs is 6.

[0027] Preferably, an indicating backing plate is arranged in the feeding area to indicate the feeding area.

[0028] Preferably, it further includes a camera, and the viewing range of the camera covers the entire feeding attraction device.

[0029] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0030] (1) For the evaluation method of the feeding attraction effect of aquatic animal feed raw materials provided by the present invention, by demarcating the effective feeding area, counting the food intake of the experimental animals and the frequency of entering the effective feeding area during the experiment, calculating the feeding attraction index through the set calculation model according to the food intake of the experimental animals and the frequency of entering the effective feeding area, and evaluating the feeding attraction effect of the feed raw materials based on the feeding attraction index. Compared with the traditional feeding attraction experiment that only considers the food intake of the experimental animals for calculating the feeding attraction index, it can more effectively evaluate the feeding attraction effect of the feed raw materials;

[0031] (2) The method for evaluating the feeding attraction effect of aquatic animal feed raw materials provided by the present invention can set multiple types of the same feed raw materials for feeding attraction experiments at one time and set corresponding control feeds as references, and compare and rank the feeding attraction effects of each feed raw material according to the feeding attraction index of each feed raw material. On the one hand, this can effectively improve the efficiency and practicability of the feeding attraction experiment; on the other hand, it can effectively avoid the interference caused by other factors such as the state of experimental animals and the environment, thereby effectively suppressing the interference factors between experimental batches.

[0032] (3) The method for evaluating the feeding attraction effect of aquatic animal feed raw materials provided by the present invention can set multiple types of different feed raw materials and multiple control feeds corresponding to the types of feed raw materials as references for feeding attraction experiments at one time, forming multiple different control groups. This enables the present invention to conduct parallel comparisons of different types of feed raw materials, so as to objectively and clearly distinguish the feeding attraction effects of different types of feed raw materials on experimental animals;

[0033] (4) The overall structure of the feeding attraction device provided by the present invention is simple, the experimental conditions are easy to achieve, and no expensive equipment is required. The preference tendency and action range of experimental animals can be directly observed. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] In order to more clearly illustrate the specific embodiments of the present invention, the drawings required for use in the specific embodiments will be briefly introduced below. It should be noted that in all the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0035] Figure 1 It is a schematic diagram of the overall structure of the feeding attraction device described in the embodiment of the present invention;

[0036] Figure 2 It is a top view of the overall structure of the feeding attraction device described in the embodiment of the present invention;

[0037] Figure 3 It is an exploded view of the overall structure of the feeding attraction device described in the embodiment of the present invention.

[0038] In the figure:

[0039] 1. Feeding attraction device; 11. Bottom plate; 12. Feeding attraction tank; 121. Slot; 13. Removable partition; 14. Feeding attraction area; 15. Central area; 16. Indicator backing plate. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0040] To make the objectives, technical solutions and advantages of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without making creative efforts shall fall within the scope of protection of the present invention.

[0041] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the system or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the above components. Without further statement, the above terms have no special meaning and should not be construed as indicating or implying relative importance.

[0042] In the description of the present invention, it should be noted that unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0043] Currently, the evaluation of the palatability of feed raw materials is mainly carried out by conducting palatability experiments and calculating the palatability index of feed raw materials. However, the calculation of the palatability index in traditional palatability experiments only considers the feed intake of experimental animals, and its evaluation effect is relatively average. At the same time, the accompanying equipment for traditional palatability experiments is relatively expensive, and it is difficult for general laboratories to meet its experimental conditions, resulting in low practicability. Therefore, the present invention provides a method for evaluating the palatability effect of aquatic animal feed raw materials and a palatability device. The calculation of its palatability index comprehensively considers two factors: the feed intake of experimental animals and the frequency of approaching the bait, which can effectively improve the evaluation effect of the palatability of feed raw materials or palatants.

[0044] The exemplary embodiments of the present invention will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present invention are shown in the drawings, it should be understood that the present invention can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present invention can be more thoroughly understood and the scope of the present invention can be completely conveyed to those skilled in the art.

[0045] Embodiment 1

[0046] As shown in the figure, an embodiment of the present invention provides a method for evaluating the effect of aquaculture animal attractants, including the following steps:

[0047] Step 1: Take an appropriate amount of evaluation feed and a pure diet and make granular evaluation bait according to a set ratio.

[0048] Step 2: Select a corresponding control feed according to the type of evaluation feed, take an appropriate amount of the control feed and a pure diet, and make granular control bait according to a set ratio. The shape and size of the control bait are the same as those of the evaluation bait.

[0049] Step 3: Select a number of experimental animals with uniform body size and good health and place them in a feeding attraction device for temporary rearing.

[0050] Step 4: Gather all the experimental animals in the central area of the feeding attraction device, install detachable partitions at the open ends of each feeding attraction tank respectively, and clean the remaining feces in the feeding attraction tank.

[0051] Step 5: Take a number of evaluation baits and control baits with the same quantity and place them in different feeding attraction areas of the feeding attraction device respectively.

[0052] Step 6: After a period of time, remove the detachable partitions at the open ends of each feeding attraction tank, and count the number of times the experimental animals enter each feeding attraction area and the bait consumption in each feeding attraction area within a set time.

[0053] Step 7: Set the attraction index of the control bait to 1, and then calculate the attraction index of the evaluation bait according to the number of times the experimental animals enter each feeding attraction area and the bait consumption in each feeding attraction area. The calculation formula of the attraction index is as follows:

[0054]

[0055] In the formula: A is the attraction index;

[0056] d1 = evaluation bait consumption / (control bait consumption + evaluation bait consumption);

[0057] d2 = number of times entering the feeding attraction area where the evaluation bait is located / (number of times entering the feeding attraction area where the evaluation bait is located + number of times entering the feeding attraction area where the control bait is located);

[0058] dDZ = 0.25;

[0059] Step 7: Evaluate the attraction effect of the evaluation feed according to the attraction index. The larger the attraction index, the better the attraction effect of the evaluation feed.

[0060] The method for evaluating the feeding attractant effect of aquatic animal feed raw materials provided by this embodiment delimits an effective feeding area, counts the food intake of experimental animals and the frequency of entering the effective feeding area during the experiment, calculates the feeding attractant index through a set calculation model based on the food intake of experimental animals and the frequency of entering the effective feeding area, and evaluates the feeding attractant effect of feed raw materials based on the feeding attractant index. Compared with the traditional feeding attractant experiment that only considers the food intake of experimental animals for calculating the feeding attractant index, it can more effectively evaluate the feeding attractant effect of feed raw materials.

[0061] Specifically, in step one, an appropriate amount of the evaluation feed and the pure diet are made into granular evaluation baits according to a set ratio, including: mixing an appropriate amount of the evaluation feed and the pure diet at a ratio of 1:1, granulating, and then passing through a 12-16 mesh sieve to obtain granules of uniform size.

[0062] Specifically, in step two, an appropriate amount of the control feed and the pure diet are made into granular control baits according to a set ratio, including: mixing an appropriate amount of the control feed and the pure diet at a ratio of 1:1, granulating, and then passing through a 12-16 mesh sieve to obtain granules of uniform size.

[0063] It should be noted that the ratios of the evaluation feed and the control feed to the pure diet and the mesh number of the sieve are not limited to the above ratios and mesh numbers. In some other specific embodiments, other ratios and mesh numbers can also be selected according to the specifications of the experimental animals.

[0064] Furthermore, in some embodiments of the present invention, the evaluation feed includes multiple types of the same feed raw materials. After the multiple feed raw materials are made into different evaluation baits respectively and placed in different feeding attractant areas of the feeding attractant device, the control feed includes a control feed corresponding to the type of the feed raw material. After the control feed is made into a control bait, it is placed in one feeding attractant area of the feeding attractant device. When calculating the feeding attractant index of different feed raw materials, the control feed is used as the control for calculation respectively.

[0065] This embodiment conducts a feeding attractant experiment by setting multiple types of the same feed raw materials at one time and sets a corresponding control feed as a reference, and compares and ranks the feeding attractant effects of each feed raw material according to the feeding attractant index of each feed raw material. On the one hand, it can effectively improve the efficiency and practicability of the feeding attractant experiment; on the other hand, it can effectively avoid the interference brought by other factors such as the state of experimental animals and the environment, thus effectively suppressing the interference factors between experimental batches.

[0066] Further, in some embodiments of the present invention, the evaluation feed includes various types of feed raw materials. The various feed raw materials are respectively made into different evaluation baits and then placed in different feeding attraction areas of the feeding attraction device. The control feed includes various control feeds corresponding to the types of feed raw materials. The various control feeds are respectively made into different control baits and then placed in different feeding attraction areas of the feeding attraction device. When calculating the feeding attraction index of different types of feed raw materials, the control feed corresponding to the type is selected as the control for calculation according to the type of the feed raw material.

[0067] In this embodiment, by setting multiple types of different feed raw materials and multiple control feeds corresponding to the types of feed raw materials as references for the feeding attraction experiment at one time, multiple different control groups can be formed. This enables the present invention to conduct parallel comparisons of different types of feed raw materials, so as to objectively and clearly distinguish the feeding attraction effects of different types of feed raw materials on experimental animals.

[0068] Preferably, the control feed includes fish meal, soybean meal, and wheat. Among them, fish meal is used as the control for animal protein-based feeding attractants, soybean meal is used as the control for plant protein-based feeding attractants, and wheat is used as the control for energy-based feeding attractants.

[0069] Specifically, when implementing this embodiment, one or several of fish meal, soybean meal, and wheat can be selected as the control feed according to the type of the evaluation feed.

[0070] It can be understood that the control feed of the present invention is not limited to the above three types. In some other embodiments, other types of materials can also be selected as the control feed.

[0071] Embodiment 2

[0072] This embodiment provides a feeding attraction device 1 for evaluating the feeding attraction effect of aquatic animal feed raw materials as described in Embodiment 1, including a bottom plate 11 and a plurality of feeding attraction grooves 12. One end of the feeding attraction groove 12 has an opening, and a detachable partition 13 is arranged at the opening. A feeding attraction area 14 is near the other end of the feeding attraction groove 12. The opening ends of the plurality of feeding attraction grooves 12 are circumferentially arranged around the bottom plate 11 and cooperate to form a concentration area 15 in the center of the bottom plate 11. The feeding attraction area 14 is separated from the concentration area 15 by the detachable partition 13.

[0073] The overall structure of the feeding attraction device 1 provided in this embodiment is simple, the experimental conditions are easy to implement, and no expensive equipment is required. The preference tendency and movement range of experimental animals can be directly observed.

[0074] Further, on the side wall of the opening end of the feeding attraction groove 12, there are oppositely arranged slots 121 for installing the detachable partition 13.

[0075] Preferably, the number of the feeding attraction grooves 12 is 6.

[0076] It is understandable that in some other specific embodiments, the number of the feeding grooves 12 can be set accordingly according to actual needs, and is not limited to 6. For example, in some specific embodiments, the number of the feeding grooves 12 can be 2, 3, 4, 5, or even more.

[0077] Furthermore, an indicating backing plate 16 is arranged in the feeding area 14 to indicate the feeding area 14, so as to facilitate the experimenters to conduct corresponding technical statistics.

[0078] Preferably, the color of the indicating backing plate 16 is white. Of course, in some other embodiments, other colors such as yellow and green can also be selected as the color of the indicating backing plate 16.

[0079] Optionally, it further includes a camera (not shown in the figure), and the shooting range of the camera covers the whole feeding device 1.

[0080] In this embodiment, by arranging a camera that can record the whole process of each feeding area 14 during the experiment, the experimenters can conduct corresponding data statistics through the video after the experiment, which can further reduce the difficulty of the experimenters in conducting data statistics.

[0081] Embodiment III

[0082] In this embodiment, the feeding effects of five feed raw materials, namely corn gluten feed, corn DDGS, 46% soybean meal, fish meal and wheat, on Litopenaeus vannamei are evaluated and compared by using the evaluation method for the feeding effect of aquatic animal feed raw materials provided in Embodiment I and the feeding device provided in Embodiment II. Specifically:

[0083] (1) Appropriately take corn gluten feed, corn DDGS, 46% soybean meal, fish meal and wheat respectively, and make five uniformly sized granular evaluation baits in a ratio of 1:1 with the pure diet.

[0084] (2) Appropriately take soybean meal and make uniformly sized granular control baits in a ratio of 1:1 with the pure diet. The shape and size of the control baits are consistent with those of the above five evaluation baits.

[0085] (3) Put 30 Litopenaeus vannamei with uniform body shape, good health and a single-tail weight of about 1.6 g into the feeding device for temporary cultivation for 24 h.

[0086] (4) Gather all the Litopenaeus vannamei in the central area of the feeding device, install detachable partitions at the open ends of each feeding groove respectively, and clean the residual feces in the feeding grooves.

[0087] (5) Place 50 pellets of the evaluation bait of corn gluten feed, the evaluation bait of corn DDGS, the evaluation bait of 46 soybean meal, the evaluation bait of fish meal, the evaluation bait of wheat, and the control bait of soybean meal in the feeding areas of the six feeding troughs respectively;

[0088] (6) After about 2 minutes, remove the detachable partition between each feeding area and the central area, and count the number of times the white shrimp enter each feeding area within 10 minutes and the bait consumption in each feeding area;

[0089] (7) Repeat steps (2), (3), (4), and (5) for three replicate experiments;

[0090] (8) Take the control bait of soybean meal in each experiment as a comparison, and calculate the feeding attraction index of the other five evaluation baits in each experiment and the average value of the feeding attraction index of all experiments.

[0091] In this embodiment, the data and calculations of each experiment are shown in the following table:

[0092]

[0093] As can be seen from the above table: In this embodiment, the feeding attraction effects of the six feed raw materials from good to bad are: fish meal, corn gluten feed, 46 soybean meal, soybean meal, wheat, and corn DDGS.

[0094] Example 4

[0095] In this embodiment, the feeding attraction effects of five feed raw materials, namely domestic fish meal, chicken meal, super steam fish meal, wheat, and soybean meal, on white shrimp were evaluated and compared by using the evaluation method for the feeding attraction effect of aquatic animal feed raw materials provided in Example 1 and the feeding attraction device provided in Example 2. Specifically:

[0096] (1) Take appropriate amounts of domestic fish meal, chicken meal, super steam fish meal, wheat, and soybean meal respectively, and make five uniformly sized granular evaluation baits in a ratio of 1:1 with the pure diet;

[0097] (2) Take an appropriate amount of fish meal and make a uniformly sized granular control bait in a ratio of 1:1 with the pure diet. The shape and size of the control bait are the same as those of the above five evaluation baits;

[0098] (3) Place 30 white shrimp with uniform body size, good health, and a single-tail weight of about 1.8 g in the feeding attraction device for temporary cultivation for 24 hours;

[0099] (4) Gather all the white shrimp in the central area and install detachable partitions at the open ends of each feeding trough, and clean the residual feces in the feeding troughs;

[0100] (5) Place 50 pieces of domestic fish meal evaluation bait, chicken meal evaluation bait, super steam fish meal evaluation bait, wheat evaluation bait, soybean meal evaluation bait, and fish meal control bait in the feeding areas of the six feeding troughs respectively;

[0101] (6) After about 2 minutes, open the detachable partition between each feeding area and the temporary rearing area, and count the number of times the white shrimp enter each feeding area within 10 minutes and the bait consumption in each feeding area;

[0102] (7) Repeat steps (2), (3), (4), and (5) for four repeated experiments;

[0103] (8) Take the fish meal control bait in each experiment as a comparison, and calculate the feeding attraction index of the other five evaluation baits for each experiment and the average value of the feeding attraction index of all experiments.

[0104] In this embodiment, the data and calculations of each experiment are shown in the following table:

[0105]

[0106] As can be seen from the above table: In this embodiment, the feeding attraction effects of the six feed raw materials from good to bad are as follows: super steam fish meal, domestic fish meal, fish meal, chicken meal, soybean meal, wheat.

[0107] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and are not intended to limit them; although the present invention has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that they can still modify the technical solutions described in the foregoing embodiments, or perform equivalent replacements for some of the technical features; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the present invention in each embodiment.

Claims

1. A method for evaluating the feeding attractant effect of aquatic animal feed raw materials, characterized in that, It includes the following steps: Take an appropriate amount of the test feed and the pure diet and make them into granular test baits according to a set ratio; Take an appropriate amount of the control feed and the pure diet and make them into granular control baits according to a set ratio, and the shape and size of the control baits are consistent with those of the test baits; Select a number of experimental animals with uniform body size and good health and place them in the feeding attraction device for temporary rearing; Gather all the experimental animals in the concentration area of the feeding attraction device and install removable partitions at the open ends of the respective feeding troughs of the feeding attraction device, and clean the residual feces in each feeding trough; Take a number of the test baits and the control baits with the same quantity and place them in different feeding areas of the feeding attraction device respectively; After a period of time, remove the removable partitions at the open ends of the respective feeding troughs, and count the number of times the experimental animals enter each feeding area and the bait consumption in each feeding area within a set time; Set the feeding attraction index of the control bait to 1, and calculate the feeding attraction index of the test bait according to the number of times the experimental animals enter each feeding area and the bait consumption in each feeding area. The formula for calculating the feeding attraction index is as follows: In the formula: A is the feeding attraction index; d1 = consumption of test bait / (consumption of control bait + consumption of test bait); d2 = number of times entering the feeding area where the test bait is located / (number of times entering the feeding area where the test bait is located + number of times entering the feeding area where the control bait is located); dDZ = 0.25; Evaluate the feeding attraction effect of the test feed according to the feeding attraction index. The larger the feeding attraction index, the better the feeding attraction effect of the test feed.

2. The evaluation method for the feeding attraction effect of aquatic animal feed raw materials according to claim 1, wherein The step of taking an appropriate amount of the test feed and the pure diet and making them into granular test baits includes: taking an appropriate amount of the test feed and the pure diet, mixing them evenly at a ratio of 1:1, granulating them, and then passing them through a 12-16 mesh sieve to obtain granular test baits with uniform size.

3. The evaluation method for the feeding attractant effect of aquatic animal feed raw materials according to claim 1, wherein The step of taking an appropriate amount of the control feed and the pure diet and making them into granular control baits includes: taking an appropriate amount of the control feed and the pure diet, mixing them evenly at a ratio of 1:1, granulating them, and then passing them through a 12-16 mesh sieve to obtain granular control baits with uniform size.

4. The evaluation method for the feeding attractant effect of aquatic animal feed raw materials according to claim 1, wherein The test feed includes multiple types of feed raw materials with the same type. After the multiple feed raw materials are respectively made into different test baits, they are respectively placed in different feeding areas of the feeding attraction device. The control feed includes a control feed corresponding to the type of the feed raw material. After the control feed is made into the control bait, it is placed in one feeding area of the feeding attraction device. When calculating the feeding attraction index of different feed raw materials, the control feed is used as the control for calculation respectively.

5. The evaluation method for the feeding attraction effect of aquatic animal feed raw materials according to claim 1, characterized in that, The test feed includes multiple different types of feed raw materials. After the multiple feed raw materials are respectively made into different test baits, they are respectively placed in different feeding areas of the feeding attraction device. The control feed includes multiple control feeds corresponding to the types of the feed raw materials. After the multiple control feeds are respectively made into different control baits, they are respectively placed in different feeding areas of the feeding attraction device. When calculating the feeding attraction index of different types of feed raw materials, the control feed corresponding to the type of the feed raw material is selected as the control for calculation according to the type of the feed raw material.

6. The method for evaluating the feeding attractant effect of aquatic animal feed raw materials according to claim 5, characterized in that, The multiple reference feeds include fish meal, soybean meal and wheat. The fish meal is used as a reference for animal protein-based evaluation feeds, the soybean meal is used as a reference for plant protein-based evaluation feeds, and the wheat is used as a reference for energy-based evaluation feeds.

7. A feeding attracting device, characterized in that, The method for evaluating the feeding attraction effect of aquatic animal feed raw materials according to any one of claims 1-6 includes a bottom plate (11) and a plurality of feeding attraction tanks (12). One end of each feeding attraction tank (12) has an opening, and a detachable partition plate (13) is arranged at the opening. A feeding attraction area (14) is near the other end of each feeding attraction tank (12). The opening ends of the plurality of feeding attraction tanks (12) are circumferentially arranged around the bottom plate (11) and cooperate with the center of the bottom plate (11) to form a concentration area (15). The feeding attraction area (14) is separated from the concentration area (15) by the detachable partition plate (13).

8. The feeding attracting device according to claim 7, characterized in that, The number of the feeding attraction tanks (12) is six.

9. The food attracting device according to claim 7, wherein An indicating backing plate (16) is arranged in the feeding attraction area (14) to indicate the feeding attraction area (14).

10. The feeding attracting device according to claim 7, wherein It further includes a camera, and the viewing range of the camera covers the whole feeding attraction device (1).

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