Babylonia lutosa food feeding device and application thereof in Babylonia lutosa food conversion rate evaluation

Abstract

The invention discloses a babylonia lutosa food feeding device and application thereof in babylonia lutosa food conversion rate evaluation, and the device is mainly characterized in that the bottom of a suitable container such as an aviation cup is drilled, the drilling position is about 1cm higher than the sand surface, and sand is prevented from entering the container; the positions of the holes are spaced by about 1cm, so that the babylonia can quickly find food; and the diameter of the hole is 0.5-1cm and is slightly greater than the diameter of the babylonia shell. The device can be applied to related experiments for evaluating the food conversion rate, and experimental errors caused by mixing of residual feed and bottom sand are effectively eliminated; in addition, the feed can be used for daily breeding, and can effectively solve the problems of bottom sand black rot caused by residual feed and the phenomenon that big and small snails fight for food.

Description

Technical Field

[0001] The invention relates to the technical field of shellfish breeding, and in particular to a food feeding device for babylonia snails and an application of the device in the evaluation of babylonia snail food conversion rate. Background Art

[0002] The babylonia snail belongs to the phylum Mollusca, class Gastropada, subclass Prosobranchia, order Nerobanchia, family Babyloniidae. It is commonly known as flower snail, prosperous snail, yellow snail, and phoenix snail. It is an aquatic animal with extremely high nutritional value. Among them, the breeding industry of the square-spotted babylonia snail (Babylonia areolata) has reached a certain scale in Hainan, Fujian, Guangdong and other places, and research on its food conversion rate is also constantly advancing.

[0003] Since the cost of feed accounts for 40-60% of the total cost, the food conversion rate trait has become one of the most concerned traits in the aquaculture industry. However, in the research process of this trait, there have long been problems such as large errors and high labor costs. In addition, the mixing of sand and feed is one of the important sources of error.

[0004] The problem of accurately collecting leftover bait in experiments related to food conversion rate has not been solved. In the early days, some people used feeding devices such as water pipe pieces and scallop shells to carry out research. Although they were effective in separating sand and leftover bait, there were still problems such as sand being brought into the feeding platform and leftover bait being pushed into the sand.

[0005] In addition, during the experimental breeding process, leftover bait and sand are often mixed, which can easily lead to black rot of sediment, directly leading to an increase in the labor cost of cleaning up leftover bait and black sand, and indirectly leading to an increased risk of disease outbreaks. Summary of the invention

[0006] In response to the above-mentioned problems, the present invention aims to provide a feeding device that can be used for accurate evaluation of food conversion rate related experiments, effectively solve the error of residual bait evaluation in food conversion rate experiments and reduce the workload during evaluation. The device can also be used to solve problems such as bottom sand black rot in daily aquaculture.

[0007] To achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] The invention provides a food feeding device for babylonia snails. The food feeding device for babylonia snails is a hollow container, an opening is arranged at the upper end of the container, and through holes for babylonia snails to eat are evenly arranged on the side wall of the container, and the holes are spaced 1 cm apart so that the babylonia snails can quickly find food; the diameter of the through hole is 0.5-1 cm, and in actual use, it only needs to be slightly larger than the diameter of the snout of the babylonia snail to be raised, wherein the through hole is about 1 cm higher than the bottom surface of the container to ensure that the through hole can be about 1 cm higher than the sand surface; the height of the feeding through hole is about 1 cm higher than the sand surface, which can effectively prevent residual bait from mixing with bottom sand, and is conducive to the accurate evaluation of food conversion rate and the maintenance of the bottom sand environment in daily breeding.

[0009] As a more preferred embodiment, preferably, a net is provided at the upper opening of the container; if the bait is lighter, the net at the upper opening of the container can prevent the remaining bait from floating out.

[0010] The above-mentioned food feeding device for baby snails can be used in the evaluation of baby snail food conversion rate and the daily breeding of baby snails.

[0011] In daily breeding, the feeding holes on the side wall of the feeding device can be set to different diameters. This method can prevent large snails from competing with small snails for food, reduce the growth gap of the same batch of snails, reduce the manpower input in seedling separation, and avoid the obvious differences in the growth characteristics of the same batch of snails, which leads to the same batch of snails not being able to be put on the market at the same time. In addition, the height of the feeding hole of the feeding device is about 1 cm higher than the sand surface, which can effectively prevent the residual bait from mixing with the bottom sand and effectively solve the problem of bottom sand black rot caused by residual bait.

[0012] The present invention also provides a method for evaluating the food conversion rate of babylonica, which uses the babylonica food feeding device. The method for evaluating the food conversion rate of babylonica comprises:

[0013] The processed bait is placed in the above-mentioned feeding device for the baby snail food, and is put into each breeding container in the breeding system to feed the baby snail; wherein, the bait should be purchased from the same batch, and its internal organs, head, etc. should be removed in advance to ensure the same quality; the bait is placed in the above-mentioned feeding device for feeding to prevent the mixing of sand and residual bait; 30 control groups are set up for each feeding, and the water content is measured.

[0014] After about 2-4 hours of feeding, the snails will burrow back into the sand. At this time, the remaining bait should be recovered as soon as possible to minimize the impact of physical disintegration and microorganisms on the quality of the remaining bait. Then, the remaining bait should be gently rinsed with fresh water to remove the salt.

[0015] Collect the remaining bait in a compartment box, the position of which corresponds to the position of the snails in the pond, and store it in a -20℃ refrigerator;

[0016] Each stage is 28 days. Dry the bait once at the end of each stage and weigh the total weight of the remaining bait.

[0017] The total feeding amount is calculated based on the wet weight and moisture content data, and the food intake is obtained by subtracting the total weight of the residual bait from the total feeding amount. After evaluating the food intake, the weight gain, that is, the growth trait, must also be measured.

[0018] Then, the feed efficiency is calculated according to the formula FER=WG / FI, where FER is feed efficiency; WG is weight gain; FI is feed intake; or the RFI (residual feed intake) value is obtained by fitting according to the formula DFI=a*MW^b+c*ADG+RFI, where DFI is daily feed intake; ADG is daily weight gain; MW is metabolic median weight, that is, the average of initial body weight and final body weight; a, b, c are partial regression coefficients; both FER and RFI indicators can reflect the food conversion rate traits.

[0019] Furthermore, the breeding system shares a circulating water breeding system consisting of a water storage tank, a temperature-controlled cooling and heating machine, an oxygen supply pipeline, a seawater supply pipeline, a water pump, an oxygen pump, a protein separator, a microfilter, and an ultraviolet lamp; in the breeding system, there is a water spray hole above every four breeding containers, and an air stone is shared in the middle to ensure that the dissolved oxygen and water environment of each snail are basically consistent.

[0020] Furthermore, the culture container is 19 cm long, 9.5 cm wide, 35 cm high, and about 15 cm deep. The extra height is used to prevent the baby snails from climbing out of the culture container. A layer of net is provided inside each culture container, and the mesh size of the net is 60 meshes to ensure smooth water flow and reduce the adsorption force of the foot muscles of the baby snails, further increasing the difficulty of the baby snails to climb out.

[0021] Furthermore, during the experiment, 50% of the water was changed every day, and on the day of feeding, the water was changed after the residual bait was recovered; during the experiment, the water temperature was controlled at 23.5±1.0°C, the salinity was 32.2±0.6ppt, the pH was 8.1±0.1, and the dissolved oxygen was 8.75±0.2mg / L.

[0022] Furthermore, during the experiment, 30-50% of the snail's body weight was fed every two days to ensure that there was a surplus after each feeding, and the weight of the bait was recorded; if it was found that the bait was almost eaten up during a certain feeding, the amount of bait was increased during the next feeding to ensure that the snails were full.

[0023] During the experiment of evaluating the food conversion rate of the baby snail, the weighed bait can be directly placed in the baby snail food feeding device to avoid the repeated movement of the bait in different containers, which can reduce both errors and workload. When the bait is placed in the feeding device, it can be effectively separated from the sand when the snail is feeding, ensuring that the bait and sand are not mixed; when collecting the residual bait, you only need to lift the feeding device to complete the collection, which greatly reduces experimental errors and labor costs.

[0024] The beneficial effects of the present invention are as follows:

[0025] 1) The present invention establishes a method for accurately evaluating the food conversion rate trait of Babylonia sp., which lays a solid foundation for further breeding and research of this trait.

[0026] 2) The feeding device of the present invention has only a feeding hole connected to the outside world, which is only slightly larger than the snout of the Dongfeng snail, and the height of the feeding hole is 1 cm higher than the sand surface. Therefore, it can effectively avoid the mixing of residual bait and bottom sand, which is beneficial to the accurate evaluation of food conversion rate and the maintenance of the bottom sand environment in daily breeding.

[0027] 3) The present invention is beneficial to reducing the error and workload in weighing bait and recovering residual bait during the food conversion rate evaluation process, thereby improving the experimental efficiency and enhancing the feasibility of the experiment. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only 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.

[0029] Figure 1 This is a photo of the device for feeding food to Babylonia snails;

[0030] Figure 2 This is a schematic diagram of the structure of the food feeding device for Babylonia conch, 1 is the feeding hole;

[0031] Figure 3 A breeding system for evaluating the food conversion rate of Babylonia fasciatus;

[0032] Figure 4 This is a schematic diagram of the food conversion rate evaluation process of Dongfeng snail. DETAILED DESCRIPTION

[0033] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described in combination with the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0034] Example 1

[0035] Refer to the attached Figure 1-2As shown, this embodiment provides a device for feeding food to Dongfeng snails, which is a hollow container with an opening at the upper end of the container; specifically, the device is made by drilling a hole in the side wall of a suitable container (such as an aviation cup, etc.).

[0036] When in use, put the bait into the container from the upper opening. The side wall of the container is evenly provided with through holes for the snails to eat. The holes are spaced 1 cm apart so that the snails can quickly find food. The diameter of the through hole is 0.5-1 cm, which can be slightly larger than the diameter of the snail's snout in actual use. The through hole is about 1 cm higher than the bottom of the container to ensure that the through hole can be about 1 cm higher than the sand surface. The feeding through hole is about 1 cm higher than the sand surface, which can effectively prevent the residual bait from mixing with the bottom sand, which is conducive to the accurate evaluation of the food conversion rate and the maintenance of the bottom sand environment in daily breeding. If the bait is light, a net can be added above the container to prevent the residual bait from floating out.

[0037] Example 2

[0038] Refer to the attached Figure 3-4 As shown, this embodiment provides a method for evaluating the food conversion rate of babylonica, which uses the babylonica food feeding device in Example 1, as follows:

[0039] On May 30, 2023, 324 pairs of Babylonia areata were paired at the Xiamen Institute of Oceanography and Fisheries, and spawning began in early June. As of December 1, 2023, a total of 37 full-sib families with more than 50 individuals were established. In January 2024, 22 full-sib families that spawned from mid-to-late June to early July 2023 and metamorphosed from late July to early August were selected, with 24 individuals from each family, for a total of 528 individuals for the food conversion rate evaluation experiment. The average shell length of the tested individuals was 2.9 cm, and the average weight was 4.9 g.

[0040] A total of 528 snails were divided into four parallel groups, with 132 snails in each group, and placed in four pools of 118 cm (length) × 240 cm (width) × 47 cm (water depth).

[0041] Each pond contains 132 breeding containers, each of which is 19 cm long, 9.5 cm wide, 35 cm high, and about 15 cm deep. The extra height is used to prevent the snails from climbing out of the breeding container. The mesh size is 60 mesh to ensure smooth water flow and reduce the suction force of the snail's foot muscles, further increasing the difficulty for the snails to climb out.

[0042] The whole aquaculture system uses a circulating water aquaculture system consisting of a water storage tank, a temperature-controlled cooling and heating machine, an oxygen supply pipeline, a seawater supply pipeline, a water pump, an oxygen pump, a protein separator, a microfilter, and an ultraviolet lamp. The bait is placed in a feeding device for feeding to prevent sand from mixing with residual bait.

[0043] In addition, there is a water spray hole above each of the four breeding containers and an air stone in the middle to ensure that the dissolved oxygen and water environment of each snail are basically consistent.

[0044] The bait was squid from the same batch to ensure the same quality. The squid was pre-processed, that is, the internal organs were removed and only the carcass was retained. During the experiment, 30-50% of the snail body weight was fed every two days to ensure that there was a surplus after each feeding, and the feeding weight was recorded. If it was found that the bait was almost eaten up during a feeding, the amount should be increased in the next feeding to ensure that the snails were full.

[0045] About 2-4 hours after feeding, the snails will burrow back into the sand and should be retrieved as soon as possible to minimize the effects of physical dispersion and microorganisms on the quality of the residual bait.

[0046] Thirty control groups were set up for each feeding and the water content was measured. The remaining bait was gently rinsed with fresh water to remove the salt.

[0047] The remaining bait is collected in a partition box, the position of which strictly corresponds to the position of the snails in the pond, and is stored in a -20℃ refrigerator.

[0048] Each stage lasted 28 days. The bait was dried at the end of each stage and the total weight of the residual bait was weighed. During the experiment, 50% of the water was changed every day. On the day of feeding, the water was changed after the residual bait was recovered. In addition, the water temperature was controlled at 23.5±1.0℃, the salinity was 32.2±0.6ppt, the pH was 8.1±0.1, and the dissolved oxygen was 8.75±0.2mg / L.

[0049] The total amount of feed is calculated based on the wet weight and moisture content data, and the total weight of the residual bait is subtracted to obtain the food intake. After evaluating the food intake, the weight gain, that is, the growth trait, needs to be measured.

[0050] Then, the feed efficiency is calculated according to the formula FER = WG / FI, where FER is feed efficiency; WG is weight gain; FI is feed intake. The RFI (residual feed intake) value can also be obtained by fitting according to the formula DFI = a*MW^b+c*ADG+RFI, where DFI is daily feed intake; ADG is daily weight gain; MW is metabolic median weight, that is, the average of initial body weight and final body weight; a, b, c are partial regression coefficients. Both FER and DFI can reflect the food conversion rate trait.

[0051] The above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit the same. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. 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 food feeding device for baby snails, characterized in that: The baby snail food feeding device is a hollow container, the upper end of which is provided with an opening, and the side wall of which is evenly provided with through holes (1).

2. The food feeding device for baby snails according to claim 1, characterized in that: The through hole (1) is 1 cm higher than the bottom surface of the container, and the diameter of the through hole is 0.5-1 cm.

3. The baby snail food feeding device according to claim 1, characterized in that: The interval between adjacent through holes (1) is 1 cm.

4. The baby conch food feeding device according to claim 1, characterized in that: A net is arranged at the opening of the upper end of the container.

5. Use of the food feeding device for babylonia snails as described in any one of claims 1 to 4 in the evaluation of babylonia snail food conversion rate.

6. A method for evaluating the food conversion rate of Babylonia truncatula, characterized in that: Using the food feeding device for babylonia snails as claimed in any one of claims 1 to 4, the food conversion rate evaluation method for babylonia snails comprises: The processed bait is placed in the baby snail food feeding device, and is placed in each breeding container in the breeding system to feed the baby snail; 30 control groups are set for each feeding, and the water content is measured; After 2-4 hours of feeding, the snails will burrow back into the sand. At this time, recover the remaining bait as soon as possible and then rinse it gently with fresh water to remove the salt. Collect the remaining bait in a compartment box, the position of which corresponds to the position of the snails in the pond, and store it in a -20℃ refrigerator; Each stage is 28 days. Dry the bait once at the end of each stage and weigh the total weight of the remaining bait. The total feeding amount was calculated based on the wet weight and water content data, and the total feeding amount minus the total weight of the residual bait was the food intake; Feed efficiency was calculated according to the formula FER = WG / FI, where FER is feed efficiency; WG is weight gain; FI is feed intake; or RFI (residual feed intake) values ​​were obtained by fitting according to the formula DFI = a*MW^b+c*ADG+RFI, where DFI is daily feed intake; ADG is daily weight gain; MW is metabolic median weight, i.e., the average of initial and final body weights; a, b, c are partial regression coefficients; Both the FER and RFI indices can reflect the food conversion rate traits.

7. The method for evaluating the food conversion rate of Babylonia snail according to claim 6, characterized in that: The aquaculture system shares a circulating water aquaculture system consisting of a water storage tank, a temperature-controlled cooling and heating machine, an oxygen supply pipeline, a seawater supply pipeline, a water pump, an oxygen pump, a protein separator, a microfilter, and an ultraviolet lamp; in the aquaculture system, there is a water spray hole above every four aquaculture containers and an air stone in the middle.

8. The method for evaluating the food conversion rate of Babylonia snail according to claim 6, characterized in that: The culture container is 19 cm long, 9.5 cm wide, 35 cm high, and has a water depth of about 15 cm. A layer of net is arranged inside each culture container, and the mesh size of the net is 60 meshes.

9. The method for evaluating the food conversion rate of Babylonia snail according to claim 6, characterized in that: During the experiment, 50% of the water was changed every day, and the water was changed after the residual bait was recovered on the feeding day; during the experiment, the water temperature was controlled at 23.5±1.0℃, the salinity was 32.2±0.6ppt, the pH was 8.1±0.1, and the dissolved oxygen was 8.75±0.2mg / L.

10. The method for evaluating the food conversion rate of Babylonia snails according to claim 6, characterized in that: During the experiment, 30-50% of the snails' body weight was fed every two days to ensure that there was a surplus after each feeding, and the weight of the feed was recorded. If the feed was found to be almost finished during a feeding, the amount of feed was increased the next time.

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