Method for regulating light intensity and light color for rearing mandarin fish with alternative feeding

Abstract

This invention relates to the field of fish resource conservation technology and discloses a method for controlling light intensity and color during the feeding acclimatization of mandarin fish. The method includes providing mandarin fish with light and dark periods during the feeding acclimatization period, simulating daily light cycles; during the light periods, feeding is conducted three times a day (morning, noon, and evening), with white light illuminating each feeding; during the remaining light periods, blue light is used. This method creates a better feeding environment for mandarin fish by providing regular light intensity and color change cycles, resulting in a shorter feeding cycle and a higher success rate. Furthermore, by adding a feeding at midday, this method helps enhance the adaptation of mandarin fish fry to the feeding acclimatization, thereby increasing the success rate.

Description

Technical Field

[0001] This invention relates to the field of fish resource conservation technology, specifically to a method for controlling light intensity and color for the domestication of mandarin fish during feeding adaptation. Background Technology

[0002] Mandarin fish (Siniperca chuatsi) is an important specialty farmed fish in my country. Its adaptation to artificial feed is a crucial step in the aquaculture process, directly determining the efficiency of its adaptation from natural live bait to formulated feed, thus affecting its feeding rate, growth performance, and survival rate. Formulated feed farming can significantly reduce farming costs, standardize processes, and promote the large-scale and standardized development of the mandarin fish farming industry. Therefore, improving the efficiency and effectiveness of adaptation is of great practical significance for increasing the profitability of mandarin fish farming and promoting high-quality industrial development. However, the adaptation of mandarin fish to artificial feed is significantly more difficult than that of largemouth bass, rainbow trout, and scorpionfish, and even more challenging than most carnivorous fish. Its "live-only" characteristic is almost an instinct ingrained in its genes. In contrast, largemouth bass has achieved large-scale artificial feed adaptation, and rainbow trout has a mature artificial feeding system, while mandarin fish is still in the technical development stage, with low success rates, high costs, and significant risks in adapting to artificial feed.

[0003] In existing technologies, methods to improve the efficiency and effectiveness of feeding adaptation in mandarin fish mainly revolve around two major directions: feeding management and environmental control. Among these, light control is the core means of environmental control: First, optimize feeding strategies by adjusting feeding time, amount, and palatability of formulated feeds to gradually replace live bait and guide mandarin fish to adapt to artificial feeds; second, use light control methods, with farmers often choosing periods of weaker light intensity in the early morning and late evening for feeding adaptation to try to reduce stress responses in mandarin fish; and third, use auxiliary environmental control by controlling parameters such as temperature and dissolved oxygen levels in the aquaculture water to provide a suitable aquatic environment for feeding adaptation.

[0004] However, existing feeding adaptation techniques still have the following technical problems: (1) Existing light regulation lacks scientific basis, relying solely on the weak light periods in the morning and evening for adaptation. The long interval between morning and evening easily leads to a decrease in the feeding rate of mandarin fish during the feeding adaptation period and a prolonged adaptation cycle; (2) Due to the limitations of Sheffield's law of animal tolerance, existing light regulation methods are relatively simple and cannot adapt to the natural feeding habits of mandarin fish, resulting in problems such as refusal to eat, reduced vitality, and increased stress response during the feeding adaptation stage; Thirdly, the adaptability of light parameters to feeding adaptation is insufficient. The combination of light intensity and color and the dynamic regulation method have not been optimized according to the physiological characteristics of mandarin fish during the feeding adaptation stage, making it difficult to fully stimulate the feeding enthusiasm of mandarin fish. In summary, the existing methods have low adaptation efficiency and unstable effects, and a scientific and reasonable light intensity and color regulation method is urgently needed to solve the problem of feeding adaptation of mandarin fish. Summary of the Invention

[0005] The present invention aims to provide a method for controlling light intensity and color for the domestication of mandarin fish to change their feeding habits, so as to solve the technical problems of low efficiency and unstable effect of domestication of mandarin fish in the prior art.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a method for controlling light intensity and color for the domestication of mandarin fish during the domestication period of mandarin fish, including providing light and dark periods for mandarin fish by simulating the daily light rhythm; during the light period, feeding is carried out three times a day, in the morning, noon and evening, with white light irradiated each time; and blue light is irradiated during the other light periods.

[0007] Preferably, as an improvement, the illumination period is from 6:00 to 19:00, and the darkness period is from 19:00 to 6:00 the next day.

[0008] Preferably, as an improvement, during the illumination period, white light is irradiated and the food is fed at 6:00-7:00, 12:00-13:00 and 18:00-19:00 respectively, with each feeding lasting for 1 hour.

[0009] Preferably, as an improvement, the light intensity of the white light and blue light is 100~300 lx.

[0010] Preferably, as an improvement, the light intensity is also provided to the mandarin fish at 5:00-6:00 with a gradual light intensity from 0 to 100 lx.

[0011] Preferably, as an improvement, the light intensity is increased at a rate of 40 to 70 lx / h from 7:00 to 10:00, and decreased at a rate of 90 to 110 lx / h from 10:00 to 12:00.

[0012] Preferably, as an improvement, the light intensity is increased at a rate of 90-110 lx / h from 13:00 to 15:00, and decreased at a rate of 40-70 lx / h from 10:00 to 12:00 and from 15:00 to 17:00.

[0013] The principle and advantages of this scheme are: Compared to other fish species that are easier to adapt to new diets, such as largemouth bass with a relatively open diet, most fry can be acclimatized early on through a gradual transition from live bait to dead bait to artificial feed. Rainbow trout adapt to pellet feed from the fry stage. The target species for this program, mandarin fish, will only prey on live fish and shrimp throughout its life, refusing stationary food. The fundamental reason is that its feeding behavior relies heavily on its vision and lateral line system to perceive moving prey. Once artificial feed sinks to the bottom and remains stationary, the mandarin fish cannot recognize it as food, and even brief movements during its descent are unlikely to trigger its attack instinct. Furthermore, mandarin fish are "sneak attack" predators, requiring a long period of observation before a sudden strike. Artificial feeding cannot simulate the random swimming patterns of natural prey, further reducing their willingness to feed. Therefore, even with existing technologies attempting breakthroughs through water flow guidance, feed dyeing, and gradual acclimatization, the overall acclimatization cycle is long, the mortality rate is high, and the success rate is unstable, limiting large-scale promotion.

[0014] 1. This method uses a combination of light intensity and color adjustment to acclimate mandarin fish to a new diet, offering advantages such as easy automation, increased success rate, and better results. Specifically, this method provides a more favorable environment for acclimatization by offering regular cycles of light intensity and color changes, resulting in a shorter acclimatization period and a higher success rate. More specifically, a blue-to-white light transition during the acclimatization period is more effective. A specific light intensity (100-300 lx) is required during this period; deviations may prolong the acclimatization period and reduce its effectiveness. Blue light simulates a natural low-light environment, reducing stress and promoting active feeding in mandarin fish; white light enhances feed visibility, assisting them in locating food. A gradual transition from blue to white light balances environmental adaptation and feeding efficiency, better aligning with the behavioral habits of mandarin fish than a single light color or a white-to-blue transition.

[0015] 2. This plan, by adding a feeding session at midday, helps enhance the adaptation of mandarin fish fry to the new diet, thus increasing the success rate of the transition. In practice, as the transition to a new diet is successful, the feeding frequency will gradually be adjusted back to morning and evening feedings. Increasing the feeding frequency further will result in poor appetite because the food has not yet been digested. Attached Figure Description

[0016] Figure 1 This is a graph showing the relationship between light intensity and time during the illumination period in Embodiment 1 of the present invention.

[0017] Figure 2 This is an external view of the feeding pool in Experiment Example 1 of the present invention (a black film covering creates a controllable lighting environment).

[0018] Figure 3 This is a diagram of the internal state of the feeding pond in Experiment Example 1 of the present invention (the right side is further divided into 5 independent breeding systems by a black membrane).

[0019] Figure 4 This is an external state diagram of each aquaculture system in Experiment Example 1 of the present invention.

[0020] Figure 5 This is a comparison of the body shape changes of mandarin fish in the experimental group and the control group after 5 days of food acclimatization in Experiment Example 1 of the present invention (the two left lines are the experimental group, and the two right lines are the control group).

[0021] Figure 6 This is a comparison of the body shape changes of mandarin fish in the experimental group and the control group after 10 days of food acclimatization in Experiment Example 1 of the present invention (left is the experimental group, right is the control group). Detailed Implementation

[0022] The present invention will be further described in detail below with reference to embodiments, but the implementation of the present invention is not limited thereto. Unless otherwise specified, the technical means used in the following embodiments and experimental examples are conventional means well known to those skilled in the art, and the materials and reagents used can all be obtained commercially.

[0023] Example 1 This solution provides a method for controlling light intensity and color during the domestication of mandarin fish for feeding. The method includes providing light and dark periods for mandarin fish during the domestication period, simulating the daily light rhythm. During the light period, the fish are fed three times a day, in the morning, noon and evening, with white light illuminating each feeding. During the other light periods, the fish are illuminated with blue light.

[0024] The daily light exposure period (5:00-19:00) for aquaculture is divided into three consecutive periods, such as... Figure 1 As shown, the specific time periods are "A+B+C", "B+C", and "B". Here, A represents the period from 5:00 to 6:00, where blue light is emitted and its intensity is gradually increased from 0 to 100 lx. (Specifically, a commercially available "intelligent LED driver system integrating PWM dimming and color temperature control" is used, along with feedback from a light sensor, to achieve linear adjustment of light intensity within the range of 0-300 lx and switching between blue and white light, and supports automatic programming operation.) The equipment and system are all common market products, such as the main control MCU, which, as the system brain, can be an STM32F103C8T6; the Wi-Fi module for remote communication can be an ESP-12F; and the light sensor for environmental perception can be a BH1750 (I...). 2(C interface, reads the current lx value); LED driver IC is used for power driving, SM2235EGH (5 channels, OUT1-3 control color / blue, OUT4-5 control white / brightness); LED beads are used as the light source, RGBW beads can be selected); B represents maintaining white light, 100lx light intensity for 1 hour; C represents 5 hours of blue light illumination, with the light intensity varying according to the pattern of 100~300~100Lx, such as illuminating blue light from 7:00~12:00 and 13:00~18:00 and varying the light intensity according to the pattern of 100~300~100Lx (reaching 300lx at 10:00 and 15:00 respectively). This solution specifically selects white or blue LEDs as the light source.

[0025] Specifically, the feeding pool is set up as follows in this plan: A standardized circulating water system is used to circulate water to six acclimatization ponds, such as... Figure 2 As shown, the top of one of the acclimatization pools was covered with two layers of black film to make it completely dark. Figure 3 As shown, the feeding pool is divided into 5 independent breeding systems (the breeding systems are located in...). Figure 3 (Right side) The black membrane of each aquaculture system extends to the bottom of the pond, making each system opaque to the others, but allowing water to flow through the bottom and ensuring that the aquaculture water is uniform throughout the acclimation process, reducing errors caused by inconsistent water quality. A front view of each aquaculture system is shown below. Figure 4 As shown, each system has an LED lighting system with adjustable light intensity. Figure 4 The LED light is encased inside the cardboard shell, which focuses the light and prevents it from scattering; the light cord above the shell is used to adjust the distance between the light and the water surface; the bottom water pipe has a hole that can be opened when feeding to create a water flow, causing the feed to tumble in the water and encouraging the fish to eat.

[0026] Based on the domestication stage, the feed should be as follows: (a) Initial acclimatization (feeding fish with insufficient activity and dead bait fish) (2 days in total) For fish with insufficient activity, feed them 30-40% of their body weight as bait, three times a day for one day. For dead bait fish (for reference, silver carp or bighead carp, 1-3cm in length can be selected), the amount of feed should be 20-30% of the weight of the mandarin fish fry, 3 meals a day for 1 day; The aim is to allow mandarin fish to adapt to the presence of non-live food and establish a feeding association.

[0027] (II) Transition Period (Mixed Feeding of Powder / Pellet Feed + Dead Bait) (5 days in total) The amount of dead bait fish coated with powder should be 10-20% of the body weight of the mandarin fish fry, 3 meals a day for 1 day; The amount of dead bait fish plus formulated feed should be 8-10% of the body weight of the mandarin fish fry (dead bait fish: formulated feed = 7:3), 3 meals a day for 1 day; The amount of dead bait fish plus formulated feed should be 6-8% of the body weight of the mandarin fish fry (dead bait fish: formulated feed = 5:5), 3 meals a day for 1 day; The amount of dead bait fish plus formulated feed is 5% of the body weight of the mandarin fish fry (dead bait fish: formulated feed = 3:7), 3 meals a day for 1 day; The amount of formulated feed should be 3% of the body weight of the mandarin fish fry, three times a day for one day; During this phase, the total amount of feed is gradually reduced, while the proportion of dead feed is gradually decreased and the proportion of artificial feed is increased. The total amount of feed is still maintained at a high level, but the artificial feed portion is fed at 2-3.5% of body weight, adjusted according to the feeding activity.

[0028] The acclimatization process lasts for 7 days. After this stage of acclimatization is completed, continue feeding with formulated feed and conduct random sampling and monitoring for 3 consecutive days. The acclimatization is considered successful when the mandarin fish's satiety rate reaches 70% after feeding.

[0029] (III) Complete transition period (all pelleted feed) After successful acclimatization, the daily feed amount should be adjusted to 2-3% of the mandarin fish fry's body weight (at suitable water temperature), and fed three times a day (morning, noon, and evening). Each feeding should be 0.6-1% of the mandarin fish fry's body weight, and the fry should be observed for 5 minutes after each feeding.

[0030] If the fish finish eating within 5 minutes (e.g., within 1 minute) and are fighting for food intensely, it means that the amount of feed is insufficient. The amount of feed needs to be increased until the fish fry swim more slowly, stop fighting for food intensely, or some of the fish fry have noticeably rounded bellies. As a reference, if the fry finish eating within 1 minute and most of them are still actively raising their heads or searching for food at the surface, they need to be fed again with 20-30% of the usual amount. If they finish eating within 1 minute, but their swimming becomes calmer and they no longer fiercely compete for food, they need to be fed again with 5-10% of the usual amount. If they finish eating within 1 minute, but some fry have noticeably round bellies, stop feeding and continue to monitor their condition. If they finish eating within 3 minutes, and most of them are still actively raising their heads or searching for food at the surface, they need to be fed again with 5-10% of the usual amount. If they finish eating within 3 minutes, but their swimming becomes calmer and they no longer fiercely compete for food, or some fry have noticeably round bellies, stop feeding.

[0031] If you find that the food is finished in about 4 to 5 minutes and there is basically no competition for it, it means that the amount of food is appropriate.

[0032] If you find that there is a lot of uneaten food or the fish are not gathering after 5 minutes, you should immediately reduce the amount to 1-2%.

[0033] In addition, as a reference, the formulated feed for each stage of the acclimatization process in this program includes the following raw materials in the following mass ratios: fish meal 550g / kg, shrimp meal 200g / kg, corn starch 120g / kg, fish oil 50g / kg, phospholipids 20g / kg, mineral premix 20g / kg, vitamin premix 20g / kg, and sodium carboxymethyl cellulose 20g / kg. The nutritional content is as follows: crude protein 52.37%, crude fat 12.06%, carbohydrates 23.93%, ash 11.64%; total energy 4.83kcal / g. In the early stage, the powder is coated onto dead fish bait; in the later stage, it is made into spherical feed with a particle size of 3-4mm and strip-shaped formulated feed with a length of 1.5-2cm (both stages use highly nutritious feed components).

[0034] Inactive baitfish and dead baitfish can be obtained through the following methods: When baitfish are placed in salt water, they are removed if they cannot swim in a balanced manner; if they all sink to the bottom, they are removed if they are dead.

[0035] For dead bait fish coated with powder, refer to the following method: Place the dead bait fish on the mesh screen, sprinkle powder while continuously shaking the screen to prevent the dead bait fish from being rolled into a ball and keep them in a long strip shape.

[0036] Experiment Example 1: Effects of different light conditions on the domestication of mandarin fish for changing their diet Experimental group: The initial size (i.e., average body length) of the mandarin fish transitioned to this diet was 4 cm. The lighting environment during the transition was the same as in Example 1.

[0037] Control group: Feeding was conducted in the morning and evening under natural photoperiod conditions, with other conditions the same as the experimental group.

[0038] Sampling rules: Five fish are randomly caught in the aquaculture area using a net for measurement.

[0039] Testing (measurement): After randomly catching fish fry with a net, first observe whether they are satiated (satiated means they have been successfully domesticated), and then measure their body length.

[0040] Calculation: Refer to the following formulas to calculate the domestication success rate and uniformity of specifications, respectively.

[0041] Domestication success rate: (Number of mandarin fish successfully switched to artificial feed / Total number of mandarin fish participating in domestication) × 100%; Uniformity of size: (Number of mandarin fish with a body length of 5cm / Number of mandarin fish that have successfully switched to artificial feed) × 100%.

[0042] The experimental results are shown in Table 1. Figures 5-6As shown in the figure. The experiment shows that the above experimental method can improve the success rate of feeding acclimatization, growth rate, and size uniformity. Specifically, in the experimental group, the success rate of feeding acclimatization for mandarin fish reached 85% after 7 days, with an average body length of about 5.3 cm and a size uniformity of over 63%. In contrast, in the control group, the success rate of feeding acclimatization for mandarin fish after 7 days was only 44%, with an average body length of about 5.0 cm and a size uniformity of over 46%.

[0043] During the process, Figure 5 The results showed that after 5 days of training, randomly catching 1-5 fish in the breeding area using a net resulted in better satiation in the experimental group fry compared to the control group fry. Figure 5 (The left fry's belly is more swollen). Figure 6 The results showed that after 10 days of acclimation, 1-5 fish were randomly caught using a net in the breeding area. The experimental group fry grew faster, were longer, and showed initial signs of fading from black compared to the control group fry. Specifically, the inventors observed that the mandarin fish fry were entirely black, but their color gradually faded as they grew. Figure 6 The fry on the left are not only visibly plumper and taller, but also lighter in color, with the body color mainly concentrated on the spots, initially departing from the completely black state of mandarin fish fry; while the fry on the right are not only shorter and thinner, but also still exhibit the black color of mandarin fish fry.

[0044] Table 1. Effects of different light conditions on the domestication of mandarin fish for changing feeding habits.

[0045] Experiment Example 2: Optimization of Feeding Frequency and Different Light Color Combinations Based on long-term feeding experience, observe the mandarin fish's belly. If the fish's belly has flattened after being satiated, it's time to feed again. This program is based on the traditional method of feeding twice a day (6:00-7:00 AM and 6:00-7:00 PM), with an additional feeding in the middle (12:00-1:00 PM). Each feeding session lasts 1 hour, centered around the designated feeding time. There is a 5-hour interval between feedings. Different color light combinations were added during the transition to a new diet. Detailed data from the screening process of different experimental groups are shown in Table 2.

[0046] Table 2 Comparison of feeding frequency and light color combinations on the effects of different feeding frequencies and light color combinations

[0047] Note: The duration of sunlight exposure is from 6:00 to 19:00.

[0048] Data shows that experimental group 5, obtained by combining early, mid, and late-night feeding acclimatization with gradual blue-white mixed light, had the highest feeding acclimatization success rate (80.10~82.35%). Specific analysis is as follows: (1) Experimental groups 1 and 2 were given constant white light of 100 lx. The morning and evening feeding acclimatization of experimental group 1 was carried out at 6:00-7:00 and 18:00-19:00, respectively. The morning, noon and evening feeding acclimatization of experimental group 2 was carried out at 6:00-7:00, 12:00-13:00 and 18:00-19:00, respectively. The effect of feeding frequency was measured in this comparative group. It was found that feeding 3 times a day can increase the growth size and the success rate of feeding acclimatization.

[0049] (2) Experimental groups 3 and 4 were under constant blue-white mixed light of 100 lx, with the same photoperiod as in Example 1. The feeding time period for experimental group 3 was the same as that for experimental group 2, except that white light was used during feeding and blue light was used during the rest of the lighting period. The feeding time period for experimental group 4 was the same as that for experimental group 2, except that blue light was used during feeding and white light was used during the rest of the lighting period. The effect of blue-white light conversion was measured in this comparative group, and it was found that the conversion from blue light to white light (i.e., blue light during the regular lighting period and white light during the feeding period) had a better acclimatization effect in experimental group 3.

[0050] (3) Experimental group 5 was subjected to a gradual blue-to-white mixed light of 100-300 lx: that is, the food was introduced and acclimatized under low light intensity, while the daytime light intensity was appropriately simulated. The light cycle was the same as in Example 1. The feeding time and light conversion of experimental group 5 were the same as those of experimental group 3. The difference was that the light intensity of experimental group 5 was gradual, and the light intensity cycle was the same as in Example 1. The effect of "constant / gradual light" was measured in the control group composed of experimental group 3 and experimental group 5. It was found that the effect of gradual light was better in experimental group 5.

[0051] In summary, this solution focuses on the adaptability of light rhythm, light color, and light intensity during the feeding acclimatization period of mandarin fish. Through the synergistic effect of white light feeding attraction, blue light steady-state control, and gradient light intensity control, it accurately matches the visual and behavioral needs of fish fry, solves the pain points of refusal to eat, stress, and low survival rate during the feeding acclimatization process, and achieves simultaneous improvement in acclimatization efficiency, fish fry survival rate, and aquaculture benefits.

[0052] 1. This program combines white light to attract fish and blue light to stabilize them, aligning with the visual and behavioral instincts of the mandarin fish (Ctenopharyngodon stenoptera), reducing environmental stress, and enhancing feeding initiative. Specifically, white light is used during feeding times in lit-up conditions. The high penetration and high visibility of white light precisely stimulate the visual receptors of the mandarin fish, inducing the fry to actively gather in the feeding area, solving the problem of difficulty in gathering for feeding in traditional dark environments. Blue light is used during non-feeding times, matching the mandarin fish's natural tendency to seek shelter in low light and avoid light and disturbance, creating a quiet and stable habitat, reducing behaviors such as fry bumping into the pond, darting away, and panicking, thus reducing behavioral stress. By aligning with the mandarin fish's diurnal feeding rhythm and distributing white light at different times, the program avoids disrupting the feeding rhythm caused by monotonous lighting, thus awakening the fry's active feeding desire.

[0053] 2. This scheme constructs a suitable light environment by combining and regulating gradient light intensity and segmented light color, accelerating the acclimatization process of mandarin fish from live bait to formulated feed and improving the success rate of acclimatization. Specifically, a gradual light intensity of 0→100→300→100lx is used to avoid sudden changes in light intensity that could stimulate the fry, allowing them to gradually adapt to the light environment and reducing refusal to eat. White light is used during the feeding period to awaken feeding activity, while blue light is used during the non-feeding period to maintain environmental stability, separating the "feeding induction" and "environmental adaptation" stages to avoid strong light interfering with feeding. The light exposure period is divided into three stages: induction, adaptation, and stabilization, forming a closed loop of "feeding signal - environmental adaptation - state consolidation," significantly shortening the acclimatization cycle.

[0054] 3. This plan employs a gradual light control strategy to reduce light stress damage to mandarin fish, ensuring the physiological health of the fry and improving survival rates during the transition to a new feeding period. Specifically, it avoids direct, strong light and sudden changes in light color to reduce visual stress and nervous tension in the fish, preventing stress reactions such as gill rot, body surface congestion, and decreased immunity. A blue light environment maintains the fry's calm state, reducing metabolic consumption. Combined with the nutritional intake from feeding under white light, this achieves a dual effect of "stress reduction + nutritional supplementation," ensuring the fry's overall health. The combination of weak light and blue light reduces retinal damage, protects the fry's visual organs, and lowers the risk of disease caused by sudden environmental changes during the transition to a new feeding period.

[0055] 4. This solution reduces feed loss and resource waste through precise light control, lowering overall farming costs and improving efficiency. Specifically, white light induces concentrated feeding, reducing feed spillage and waste, improving feed utilization, and lowering feed procurement costs. It also increases the success rate of transitioning to new feeds, significantly reducing the amount and cost of live bait, and avoiding the site and labor costs associated with live bait farming. The use of LED light sources offers high luminous efficiency and low energy consumption, and combined with precise time-of-use control, reduces the energy costs of the lighting system.

[0056] 5. This solution's composite light control method is standardized, easy to operate, and adaptable to different scenarios such as factory farming and pond farming, possessing high replicability and convenient management. Specifically, it only requires timed switching of light intensity and color through an LED lighting control system, eliminating the need for complex equipment and lowering the barrier to manual operation. The light control parameters are adapted to different growth stages of mandarin fish, allowing for flexible adjustment of light intensity, color, and time of day, making it suitable for various scenarios such as factory farming recirculating aquaculture systems and pond farming. The parameters are clear and logical, allowing for batch replication to large-scale farming bases, ensuring consistent acclimatization effects across different batches of fry.

[0057] The above descriptions are merely embodiments of the present invention, and common knowledge such as specific technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solutions of the present invention, and these should also be considered within the scope of protection of the present invention. These modifications and improvements will not affect the effectiveness of the implementation of the present invention or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A method for controlling light intensity and color for the domestication of mandarin fish during their transition to other feeding environments, characterized in that: This includes simulating daily light and dark periods for mandarin fish during their transition to a new diet; During the light-time period, feed the animals three times a day: morning, noon, and evening, and expose them to white light each time they are fed. Blue light is used during the remaining lighting periods.

2. The method for controlling light intensity and color for the domestication of mandarin fish in accordance with claim 1, characterized in that: The light period is from 6:00 to 19:00, and the dark period is from 19:00 to 6:00 the next day.

3. The method for controlling light intensity and color for the domestication of mandarin fish in accordance with claim 2, characterized in that: During the light-emitting periods, white light was irradiated and the animals were fed at 6:00-7:00, 12:00-13:00, and 18:00-19:00, with each feeding lasting 1 hour.

4. A method for controlling light intensity and color for the domestication of mandarin fish in accordance with claim 3, characterized in that: The light intensity of the white and blue light is 100~300 lx.

5. The method for controlling light intensity and color for the domestication of mandarin fish in accordance with claim 4, characterized in that: It also includes providing mandarin fish with a gradual light intensity from 0 to 100 lx between 5 and 6 o'clock.

6. A method for controlling light intensity and color for the domestication of mandarin fish in accordance with claim 5, characterized in that: From 7:00 to 10:00, the light intensity is increased at a rate of 40 to 70 lx / h, and from 10:00 to 12:00, the light intensity is decreased at a rate of 90 to 110 lx / h.

7. A method for controlling light intensity and color for the domestication of mandarin fish in accordance with claim 6, characterized in that: From 13:00 to 15:00, increase the light intensity at a rate of 90 to 110 lx / h; from 10:00 to 12:00 and from 15:00 to 17:00, decrease the light intensity at a rate of 40 to 70 lx / h.

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