Precise prediction method for outbreak swimming speed of pseudosciaena crocea based on caudal peduncle length index

Abstract

The invention provides a method for accurately predicting the outbreak swimming speed of pseudosciaena crocea based on a caudal peduncle length index, and the method comprises the steps: 1) collecting healthy pseudosciaena crocea individuals which come from the same breeding group and are cultured under the same condition, and measuring the caudal peduncle length of the pseudosciaena crocea one by one; and 2) predicting the outbreak swimming speed of the pseudosciaena crocea according to the measured pseudosciaena crocea tail stem length data and based on the established pseudosciaena crocea outbreak swimming speed prediction model. According to the method, a fish swimming capacity related measuring device and a tedious measuring process do not need to be set up, but the outbreak swimming speed difference between healthy large yellow croaker individuals of the same breeding group is directly predicted by measuring the length of the caudal peduncle. According to the method, a technology for accurately predicting the outbreak swimming speed of the pseudosciaena crocea based on the measurement of the length of the caudal peduncle is established for the first time, a tedious, time-consuming and labor-consuming test process is avoided, the damage of the test process to the pseudosciaena crocea is reduced, and the technology can powerfully promote the cultivation of new anti-flow varieties of the pseudosciaena crocea and the development of the deep sea culture industry.

Description

Technical Field

[0001] This invention relates to the fields of fish genetics and breeding and deep-sea aquaculture, and in particular to a precise method for predicting the burst swimming speed of large yellow croaker based on the caudal peduncle length index. Background Technology

[0002] Large yellow croaker (Larimichthys crocea) is an important farmed fish species in my country. In recent years, nearshore farming of large yellow croaker has approached saturation, and high-density nearshore farming has led to problems such as water quality deterioration and frequent disease outbreaks. Improving the current resistance of large yellow croaker and cultivating new current-resistant varieties are important ways to solve this problem. Although Chinese researchers have already cultivated four new nationally approved varieties of large yellow croaker, including "Fufa No. 1," these new varieties mainly focus on traits such as rapid growth and body size, which are far from meeting the needs of deep-sea aquaculture for improved current-resistant varieties.

[0003] Swimming speed and swimming time are important indicators for evaluating the swimming ability of fish. Currently, the main measurement indicators for fish swimming ability include critical swimming speed, burst swimming speed, and endurance time. Critical swimming speed is the upper limit of aerobic swimming ability in fish, reflecting their ability to sustain movement. Endurance time and burst swimming speed are both indicators for assessing the anaerobic exercise ability of fish. Endurance time is the time a fish can withstand swimming at a relatively high fixed speed and is an important indicator for evaluating the current resistance of fish. Burst swimming speed reflects the fish's ability to accelerate its swimming against strong currents, pursuit, or escape, and is an important indicator for evaluating the current resistance of fish. In deep-sea aquaculture, sudden strong currents often impact fish against aquaculture cages or enclosures, causing injury and death. Therefore, large yellow croaker, with its higher burst swimming speed, is more suitable for deep-sea aquaculture environments, and the current resistance of new large yellow croaker strains should be evaluated using burst swimming speed as the indicator.

[0004] Currently, the comparison of burst swimming speed among large yellow croaker individuals is mainly done by setting up relevant measuring devices to measure the burst swimming speed of each individual. However, this measurement process is very time-consuming and labor-intensive, especially when selecting for breeding for resistance to current. It often requires collecting the burst swimming speed of thousands of large yellow croakers, and the measurement process can lead to exhaustion and death of the fish. Summary of the Invention

[0005] In order to overcome the problems existing in the prior art, the purpose of this invention is to provide an accurate prediction method for the burst swimming speed of large yellow croaker based on the caudal peduncle length index.

[0006] To achieve the above-mentioned technical objectives, the technical solution adopted by this invention is as follows:

[0007] A precise prediction method for the burst swimming speed of large yellow croaker based on caudal peduncle length index includes:

[0008] 1) Collect healthy large yellow croaker individuals from the same breeding group and raised under the same conditions, and measure the caudal peduncle length of each large yellow croaker;

[0009] 2) Based on the measured caudal peduncle length data of the large yellow croaker and the established prediction model for the explosive swimming speed of the large yellow croaker, the explosive swimming speed of the large yellow croaker is predicted.

[0010] Furthermore, the large yellow croaker individuals collected in step 1) were 6-8 cm in total length.

[0011] Furthermore, the caudal peduncle length mentioned in step 1) is the straight-line distance from the end of the caudal fin base to the end of the caudal peduncle.

[0012] Furthermore, the prediction model for the burst swimming speed of large yellow croaker established in step 2) is as follows:

[0013] y = 1.0181x - 0.1024(R) 2 =0.9165)

[0014] Where y represents the burst swimming speed of the large yellow croaker, in cm / s; x represents the caudal peduncle length of the large yellow croaker, in cm; and R represents the Pearson correlation coefficient.

[0015] This invention also provides a method for screening large yellow croaker with high resistance to currents, comprising:

[0016] The above prediction method is used to predict the burst swimming speed of large yellow croaker;

[0017] Based on the predicted burst swimming speed of large yellow croaker, large yellow croaker with high resistance to currents were selected.

[0018] Furthermore, based on the predicted burst swimming speed of large yellow croaker, large yellow croaker with high resistance to currents are selected, and any one of the following schemes a) and b) is chosen;

[0019] a) Select large yellow croaker individuals whose predicted burst swimming speed is greater than a set threshold as large yellow croakers with high resistance to current;

[0020] b) Sort the large yellow croaker individuals from largest to smallest according to their predicted burst swimming speed, and select the top n large yellow croaker individuals as those with high resistance to current.

[0021] By adopting the above technical solution, the present invention has the following beneficial effects compared with the prior art:

[0022] This invention pioneered a method for predicting the burst swimming speed of large yellow croaker based on caudal peduncle length measurement. This method not only avoids cumbersome testing processes but also causes minimal damage to the fish, and is of great significance in the evaluation of large yellow croaker's resistance to current and in the breeding of fish with resistance to current. Attached Figure Description

[0023] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0024] Figure 1 This is a structural diagram of a closed playground-shaped water tank device. The labels in the diagram are as follows: 1. Main water pump; 2. Auxiliary water pump; 3. Frequency converter; 4-6. Baffle; 7. Flow stabilizer; 8. Flow stabilizer net; 9. Test area; 10. Inlet; 11. Outlet.

[0025] Figure 2 A scatter plot of the inverter readings versus flow rate and the regression equation for the large yellow croaker.

[0026] Figure 3 A scatter plot and regression equation for the total length and burst swimming speed of the large yellow croaker.

[0027] Figure 4 A scatter plot and regression equation for the weight of large yellow croaker versus its burst swimming speed.

[0028] Figure 5 A scatter plot and regression equation for the body length and burst swimming speed of the large yellow croaker.

[0029] Figure 6 A scatter plot and regression equation for the caudal fin length and burst swimming speed of the large yellow croaker.

[0030] Figure 7 A scatter plot and regression equation for the caudal peduncle length and burst swimming speed of the large yellow croaker.

[0031] Figure 8 A scatter plot and regression equation for the high-burst swimming speed of the caudal peduncle of the large yellow croaker.

[0032] The above Figures 2-8 In this context, a single dot represents an individual. Detailed Implementation

[0033] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the invention. Similarly, the following embodiments are only some, not all, embodiments of the present invention, and all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0034] This embodiment provides an accurate prediction method for the burst swimming speed of large yellow croaker based on the caudal peduncle length index, including:

[0035] Collect healthy large yellow croaker individuals from the same breeding group and raised under the same conditions, with a total length of 6-8cm;

[0036] Use calipers or a ruler to measure the caudal peduncle length of each large yellow croaker. The caudal peduncle length is the straight-line distance from the base of the caudal fin to the end of the caudal peduncle.

[0037] Based on the measured caudal peduncle length data of the large yellow croaker and the established prediction model for the explosive swimming speed of the large yellow croaker: y = 1.0181x – 0.1024(R 2 =0.9165), to predict the burst swimming speed of large yellow croaker.

[0038] In the above formula, y represents the burst swimming speed of the large yellow croaker, in cm / s; x represents the caudal peduncle length of the large yellow croaker; and R represents the Pearson correlation coefficient. The burst swimming speed prediction model for large yellow croaker shows a positive correlation between caudal peduncle length and burst swimming speed; the longer the caudal peduncle, the higher the burst swimming speed.

[0039] This embodiment also provides a method for screening large yellow croaker with high resistance to currents, including:

[0040] The above prediction method is used to predict the burst swimming speed of large yellow croaker;

[0041] Based on the predicted burst swimming speed of large yellow croaker, select large yellow croaker with high resistance to currents, specifically choosing any one of the following schemes a) and b).

[0042] a) Select large yellow croaker individuals whose predicted burst swimming speed is greater than a set threshold as large yellow croakers with high resistance to current;

[0043] b) Sort the large yellow croaker individuals from largest to smallest according to their predicted burst swimming speed, and select the top n large yellow croaker individuals as those with high resistance to current.

[0044] The above-mentioned model for predicting the burst swimming speed of large yellow croaker is established as follows:

[0045] Example 1: Construction of a device for measuring the burst swimming speed of large yellow croaker

[0046] Design an enclosed playground-shaped water trough device, the structure of which is as follows: Figure 1As shown, the device includes: 1. Main water pump: controlled by a frequency converter, the pump power can be changed by manually adjusting the frequency converter, providing a controllable flow rate for subsequent experiments; 2. Auxiliary water pump: provides a certain basic water flow to the device, increasing the basic water flow size; 3. Frequency converter: connected to the main water pump, controlling the water flow rate by controlling the pump power; 4-5. Baffle: reduces the uneven flow velocity inside and outside the device caused by water flow turning; 6. Baffle: narrows the waterway to increase the water flow; 7-8. Flow stabilizer and flow stabilizer net: stabilize the water flow and make the flow velocity more uniform; 9. Test area: fine nets are installed before and after the test area to prevent large yellow croaker from swimming out of the test area and to make the water flow within the area more uniform; 10. Inlet: water is continuously added to the device to maintain the stability of water temperature and dissolved oxygen during the experiment; 11. Outlet: the outlet is used to drain water to maintain the stability of the overall water volume of the device during the experiment.

[0047] Example 2: Preparation of the large yellow croaker to be tested

[0048] Healthy (clean and without mortality) large yellow croakers from the same breeding population and raised under the same conditions were cultured in a flowing water system for one week without being fed. The fish reached a total length of 6-8 cm.

[0049] Example 3: Measurement of the burst swimming speed of large yellow croaker

[0050] Seawater was added to the measuring device, and a large yellow croaker was randomly selected and placed in the test area. The inverter reading was initially set to 10, allowing the fish to acclimatize in the slowly flowing water for 5 minutes. The inverter reading was then gradually increased by 2.5 each time, with the fish swimming continuously for 20 seconds. The fish was removed from the net after 5 seconds of contact with it. The fish's weight, body length, total length, caudal fin length, caudal peduncle length, and caudal peduncle height were measured using a ruler. The water flow velocity was measured using a portable LS300-A current meter. This process was repeated until all fish of all sizes were tested.

[0051] Example 4: Data Analysis

[0052] S1. Establish a linear regression equation between inverter readings and water flow velocity.

[0053] Using the inverter readings as the x-axis and water flow velocity as the y-axis, construct a scatter plot of inverter readings versus flow velocity in Excel, establish a linear regression equation for inverter readings versus flow velocity, and plot a trend line (e.g., ...). Figure 2 (As shown).

[0054] S2, Calculate the burst swimming speed of the large yellow croaker.

[0055] The formula for calculating explosive swimming speed is as follows:

[0056] U burst =v+(t / T)Δv

[0057] In the formula, U burst Let v be the burst swimming speed (cm / s), v be the maximum swimming speed that can be completed within the set time (cm / s), Δv be the speed increment, T be the set continuous swimming time, and t be the actual continuous swimming time that cannot be completed within the set time. The cross-sectional area of ​​the fish in this experiment did not exceed 10% of the cross-sectional area of ​​its swimming tube, so no calibration is required.

[0058] S3. Establish a linear regression equation between the body size characteristics of large yellow croaker and water flow velocity.

[0059] Using body size data as the x-axis and flow velocity as the y-axis, construct a scatter plot of body size parameters versus burst swimming velocity in Excel, establish a regression equation for body size versus burst swimming velocity, and plot a trend line (e.g., Figure 3-8 (As shown).

[0060] from Figures 3-8 It can be seen that there is a strong correlation between the caudal peduncle length and burst swimming speed of the large yellow croaker (R0). 2 =0.9165). This result indicates that for healthy large yellow croaker individuals from the same breeding population and raised under the same conditions, the longer the caudal peduncle, the higher their burst swimming speed.

[0061] The above description is only a part of the embodiments of the present invention and does not limit the scope of protection of the present invention. Any equivalent device or equivalent process transformation made based on the content of the present invention specification and drawings, or direct or indirect application in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A precise prediction method for the burst swimming speed of large yellow croaker based on caudal peduncle length index, characterized in that, include: 1) Collect healthy large yellow croaker individuals from the same breeding group and raised under the same conditions, and measure the caudal peduncle length of each large yellow croaker; 2) Based on the measured caudal peduncle length data of the large yellow croaker and the established prediction model for the explosive swimming speed of the large yellow croaker, the explosive swimming speed of the large yellow croaker is predicted.

2. The method for accurately predicting the burst swimming speed of large yellow croaker based on caudal peduncle length index according to claim 1, characterized in that, The large yellow croakers collected in step 1) are 6-8cm in total length.

3. The method for accurately predicting the burst swimming speed of large yellow croaker based on caudal peduncle length index according to claim 1, characterized in that, The caudal peduncle length mentioned in step 1) is the straight-line distance from the end of the caudal fin base to the end of the caudal peduncle.

4. The method for accurately predicting the burst swimming speed of large yellow croaker based on caudal peduncle length index according to claim 1, characterized in that, The prediction model for the burst swimming speed of large yellow croaker established in step 2) is as follows: y = 1.0181x - 0.1024 Where y represents the burst swimming speed of the large yellow croaker, in cm / s; and x represents the caudal peduncle length of the large yellow croaker, in cm.

5. A method for screening large yellow croaker with high resistance to currents, characterized in that, include: The burst swimming speed of large yellow croaker is predicted using the prediction method described in any one of claims 1 to 4. Based on the predicted burst swimming speed of large yellow croaker, large yellow croaker with high resistance to currents were selected.

6. The screening method for large yellow croaker with high resistance to currents according to claim 5, characterized in that, Based on the predicted burst swimming speed of large yellow croaker, select large yellow croaker with high resistance to currents, and choose any one of the following schemes a) and b). a) Select large yellow croaker individuals whose predicted burst swimming speed is greater than a set threshold as large yellow croakers with high resistance to current; b) Sort the large yellow croaker individuals from largest to smallest according to their predicted burst swimming speed, and select the top n large yellow croaker individuals as those with high resistance to current.

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