Adaptive temporary rearing method for enhanced and released offspring seeds

Abstract

The invention belongs to the technical field of temporary rearing of offspring seeds, and provides an adaptive temporary rearing method for enhanced and released offspring seeds, which comprises the following steps: presetting a monitoring time period, monitoring the ingestion process of the enhanced and released offspring seeds in a temporary rearing pond, analyzing the ingestion activity of the enhanced and released offspring seeds, and judging whether the enhanced and released offspring seeds have abnormal behaviors or not; if the abnormal behavior occurs, acquiring the ingestion activity in a plurality of historical monitoring time periods, and analyzing whether the ingestion activity presents a descending trend or not; if yes, the dissolved oxygen amount of the temporary rearing pond in a plurality of historical monitoring time periods is obtained, and whether the feeding activity of the enhancement and release fries is reduced or not due to the change of the dissolved oxygen amount is judged by conducting synchronous change analysis on the dissolved oxygen amount in the temporary rearing pond and the feeding activity of the enhancement and release fries; the method improves the refinement and scientificity of temporary breeding management of the enhanced and released offspring seeds, reduces the breeding safety risk, guarantees the quality of the offspring seeds, and assists in improving the overall effect of the enhanced and released offspring seeds.

Description

Technical Field

[0001] This invention belongs to the field of seedling temporary rearing technology, specifically a method for adaptive temporary rearing of propagated and released seedlings. Background Technology

[0002] Stock enhancement is an important technical means to replenish aquatic biological resources and restore aquatic ecosystems. Seedling adaptation and temporary rearing, as a crucial preliminary step in stock enhancement, directly determines seedling survival rate, wild adaptability, and the effectiveness of subsequent stock enhancement. During the temporary rearing process, seedling feeding activity is a core indicator reflecting their physiological state, adaptability, and environmental suitability. Dissolved oxygen, as a key environmental factor for aquatic organism survival, is closely related to seedling feeding behavior and physiological health. If regulation is not timely or precise, it can easily lead to stress responses, decreased feeding, or even death in seedlings, thus hindering the quality of temporary rearing and the effectiveness of stock enhancement.

[0003] In the current temporary rearing process of released aquatic seedlings, monitoring of seedling feeding activities relies heavily on manual observation, which suffers from significant subjective errors and lacks quantitative assessment, making it difficult to accurately identify abnormal seedling behaviors and trends in feeding activity. Furthermore, the lack of quantitative correlation analysis between dissolved oxygen levels and feeding activity levels can easily lead to misjudgments of precipitating factors and blind regulation. In addition, dissolved oxygen regulation often employs fixed parameters without addressing deviations in seedling feeding activity, which can easily trigger gas bubble disease due to dissolved oxygen oversaturation or hypoxic stress due to insufficient dissolved oxygen, further impacting the safety and stability of the temporary rearing of seedlings.

[0004] Therefore, the present invention provides a method for the adaptive temporary rearing of seedlings released for propagation. Summary of the Invention

[0005] In order to overcome the shortcomings of the prior art, at least one technical problem raised in the background art is solved.

[0006] The technical solution adopted by this invention to solve its technical problem is: During the preset monitoring period, the feeding process of the released seedlings in the temporary holding pond is monitored, the feeding activity of the released seedlings is analyzed, and it is determined whether the released seedlings exhibit abnormal behavior. If abnormal behavior is detected, obtain the feeding activity level over multiple historical monitoring periods and analyze whether the feeding activity level shows a downward trend. If a downward trend is observed, the dissolved oxygen levels in the holding ponds during multiple historical monitoring periods are obtained. By analyzing the synchronous changes in dissolved oxygen levels in the holding ponds and the feeding activity of the released seedlings, it can be determined whether the decrease in feeding activity of the released seedlings is caused by changes in dissolved oxygen levels. If so, by performing deviation analysis on the feeding activity of the released seedlings, the feeding-related dissolved oxygen compensation amount can be determined. Based on the feeding-related dissolved oxygen compensation amount and combined with the dissolved oxygen safe range value, the dissolved oxygen regulation amount can be determined.

[0007] As a further aspect of the present invention: the process for determining the feeding activity level is as follows: A combination algorithm of background subtraction and morphological filtering is used to denoise the video image, retain the moving pixel blocks that conform to the body shape of the seedling, and use the identified moving pixel blocks as foreground pixels. The monitoring period includes the period before feeding and the period after feeding. By analyzing and processing the video frames of the period before feeding and the period after feeding, the average value of the foreground pixels and the total number of foreground pixels after feeding are determined. The duration of the peak value of the foreground pixel within the time period after feeding is recorded as the peak duration. The difference between the total number of foreground pixels after feeding and the average number of foreground pixels after feeding is calculated, and then the ratio is calculated with the average number of foreground pixels after feeding to obtain the relative intensity of the feeding response. The feeding activity level of the released seedlings was obtained by multiplying the relative intensity of the feeding response with the duration of the peak value.

[0008] As a further aspect of the present invention: the process for determining the average value of foreground pixels after baiting and the total number of foreground pixels after baiting is as follows: Extract video frames from the period before feeding, divide the period before feeding into multiple pre-feeding time points according to equal time intervals, count the foreground pixels at each pre-feeding time point, sum and average the foreground pixels at all pre-feeding time points in the period before feeding, and obtain the average value of the foreground pixels before feeding. Extract video frames from the period after baiting, divide the period after baiting into multiple post-baiting time points according to equal time intervals, count the foreground pixels at each post-baiting time point, extract the peak value of the foreground pixels within the post-baiting period, and record it as the total number of foreground pixels after baiting.

[0009] As a further aspect of the present invention: the process of determining whether the released seedlings exhibit abnormal behavior is as follows: If the feeding activity level of the released seedlings is greater than or equal to the feeding activity threshold, then the released seedlings do not exhibit abnormal behavior; otherwise, the released seedlings exhibit abnormal behavior.

[0010] As a further aspect of the present invention: the process of analyzing whether the feeding activity level shows a downward trend is as follows: The feeding activity levels from multiple historical monitoring periods were integrated into a feeding activity time series in chronological order. A univariate linear regression was then performed on the feeding activity time series to obtain the trend slope of the feeding activity. If the slope of the feeding activity trend is less than 0, it indicates that the feeding activity has been declining over multiple historical monitoring periods.

[0011] As a further aspect of the present invention: the process of synchronously analyzing the changes in dissolved oxygen levels and feeding activity of the released seedlings in the temporary rearing pond is as follows: Dissolved oxygen levels in the holding tanks were extracted and analyzed for multiple historical monitoring periods to determine whether dissolved oxygen levels showed a downward trend over these periods. Based on the downward trend in dissolved oxygen levels over these periods, the feeding activity time series and the dissolved oxygen time series were time-stamped together. The absolute value of the Pearson correlation coefficient formula was used to calculate the synchronous correlation between feeding activity and dissolved oxygen over multiple historical monitoring periods.

[0012] As a further aspect of the present invention: the process of determining whether the decrease in feeding activity of the released seedlings is caused by changes in dissolved oxygen levels is as follows: If the synchronization correlation value is greater than or equal to the synchronization correlation threshold, it indicates that the decrease in feeding activity of the released seedlings is caused by changes in dissolved oxygen levels; otherwise, it indicates that the decrease in feeding activity of the released seedlings is not caused by changes in dissolved oxygen levels.

[0013] As a further aspect of the present invention: the process of determining whether the dissolved oxygen level shows a downward trend over multiple historical monitoring periods is as follows: The dissolved oxygen levels in the holding tanks during multiple historical monitoring periods were integrated into a time series of dissolved oxygen levels. A univariate linear regression was performed on the dissolved oxygen time series to obtain the slope of the dissolved oxygen trend. If the slope of the dissolved oxygen trend is less than 0, it indicates that the dissolved oxygen has been decreasing over multiple historical monitoring periods.

[0014] As a further aspect of the present invention: the process for determining the food intake-related dissolved oxygen compensation is as follows: The absolute value of the difference between the feeding activity level and the feeding activity threshold is taken, and then the ratio is calculated with the feeding activity threshold to obtain the relative deviation of the activity level. Obtain the preset dissolved oxygen saturation value and dissolved oxygen critical value, and take the absolute value after subtracting the dissolved oxygen saturation value and dissolved oxygen critical value to obtain the dissolved oxygen safe range value. The dissolved oxygen safe range value is multiplied by the relative deviation of activity, and then multiplied by the synchronization correlation value to obtain the feeding-related dissolved oxygen compensation amount.

[0015] As a further aspect of the present invention: the process for determining the dissolved oxygen regulation amount is as follows: The dissolved oxygen compensation amount related to food intake is summed with the dissolved oxygen threshold value to obtain the dissolved oxygen target value. The current dissolved oxygen level is then obtained. If the dissolved oxygen target value is less than the dissolved oxygen saturation value, the difference between the dissolved oxygen target value and the current dissolved oxygen level is calculated to obtain the dissolved oxygen regulation amount. If the dissolved oxygen target value is greater than or equal to the dissolved oxygen saturation value, the difference between the dissolved oxygen saturation value and the current dissolved oxygen level is calculated to obtain the dissolved oxygen regulation amount.

[0016] The beneficial effects of this invention are as follows: By aligning and quantifying the correlation between dissolved oxygen levels and feeding activity timestamps, subjective biases are avoided, enabling objective tracing and reliable determination of dissolved oxygen inducing factors, thus providing data support for precise regulation. Based on feeding activity deviations, the safe range of dissolved oxygen, and the strength of the correlation, the amount of dissolved oxygen regulation is calculated and an upper limit constraint is set to avoid the risk of gas bubble disease. Combined with two-step regulation of emergency oxygenation and root cause investigation, the hypoxia stress of seedlings is effectively alleviated and the feeding status is stabilized. This improves the refinement and scientific nature of the temporary holding management of released seedlings, reduces aquaculture safety risks, ensures seedling quality, and helps improve the overall effectiveness of stock enhancement and release. Attached Figure Description

[0017] The invention will now be further described with reference to the accompanying drawings.

[0018] Figure 1 This is a flowchart illustrating the steps of a method for adapting and temporarily raising seedlings for propagation and release according to an embodiment of the present invention. Figure 2 This is a system block diagram of an adaptive temporary rearing system for propagation and release seedlings according to an embodiment of the present invention. Detailed Implementation

[0019] To make the technical means, creative features, objectives and effects of this invention easier to understand, the invention will be further described below in conjunction with specific embodiments.

[0020] Example 1 Please see Figure 1 As shown in the embodiment of the present invention, a method for the adaptive temporary rearing of released seedlings includes the following steps: Step 1: Set a monitoring period and monitor the feeding process of the released fry in the temporary holding pond. Analyze the feeding activity of the released fry and determine whether the released fry exhibit any abnormal behavior. Positioned directly above the feeding area, with a view covering the entire feeding area, the fixed camera installation location employs a combination of background subtraction and morphological filtering algorithms to denoise the video footage. This process segments and removes bubbles, impurities (small pixels), and water flow fluctuations (low-frequency pixels), retaining only moving pixel blocks that match the size of the seedlings (set according to seedling specifications). The identified moving pixel blocks are then used as foreground pixels. The monitoring period includes the period before feeding and the period after feeding. Video frames of the period before feeding are extracted. The period before feeding is divided into multiple pre-feeding unit time points according to equal time intervals. Foreground pixels are counted at the pre-feeding unit time points. The summation and average of the foreground pixels at all pre-feeding unit time points in the period before feeding is obtained to get the average value of the foreground pixels before feeding. Extract video frames from the period after feeding, divide the period after feeding into multiple unit time points according to equal time intervals, count the foreground pixels at each unit time point after feeding, extract the peak value of the foreground pixels in the period after feeding (i.e. the number of pixels when the fish gather and fight for food most fiercely), and record it as the total number of foreground pixels after feeding. It should be noted that the average number of foreground pixels before feeding is the average number of foreground pixels over a period of time before feeding, which represents the background activity of the fish in their natural state; the total number of foreground pixels after feeding is the peak number of foreground pixels over a period of time after feeding, which directly reflects the intensity of the fish gathering to compete for food. The duration of the peak value of the foreground pixel within the time period after feeding is recorded as the peak duration. The difference between the total number of foreground pixels after feeding and the average number of foreground pixels after feeding is calculated, and then the ratio is calculated with the average number of foreground pixels after feeding to obtain the relative intensity of the feeding response. It should be noted that if the average value of the foreground pixels is 0, the relative intensity of the feeding response is assigned a value of 1, which means that the seedling has no background activity and the response after feeding is the maximum relative intensity. The feeding activity level of the released seedlings was obtained by multiplying the relative intensity of the feeding response with the duration of the peak value. It should be noted that the higher the feeding activity value of the released fry, the more fish enter the feeding area per unit time, the more vigorous their movement, and the stronger their feeding desire, which can effectively assess the speed and scale of fish gathering. If the feeding activity level of the released seedlings is greater than or equal to the feeding activity threshold, then the released seedlings do not exhibit abnormal behavior. If the feeding activity of the released seedlings is less than the feeding activity threshold, then the released seedlings will exhibit abnormal behavior. Step 2: If abnormal behavior occurs, obtain the feeding activity level over multiple historical monitoring periods and analyze whether the feeding activity level shows a downward trend; The feeding activity levels from multiple historical monitoring periods were integrated into a feeding activity time series in chronological order. A univariate linear regression was then performed on the feeding activity time series to obtain the trend slope of the feeding activity. If the slope of the feeding activity trend is less than 0, it indicates that the feeding activity has been declining over multiple historical monitoring periods. If the slope of the feeding activity trend is equal to 0, it means that the feeding activity has no obvious trend over multiple historical monitoring periods; If the slope of the feeding activity trend is greater than 0, it indicates that the feeding activity has been on an upward trend over multiple historical monitoring periods. Step 3: If a downward trend is observed, obtain the dissolved oxygen levels in the holding ponds during multiple historical monitoring periods. By analyzing the synchronous changes in dissolved oxygen levels in the holding ponds and the feeding activity of the released seedlings, determine whether the decrease in feeding activity of the released seedlings is caused by changes in dissolved oxygen levels. The dissolved oxygen levels in the holding tanks were extracted from multiple historical monitoring periods and integrated into a time series of dissolved oxygen levels. A univariate linear regression was performed on the dissolved oxygen time series to obtain the slope of the dissolved oxygen trend. If the slope of the dissolved oxygen trend is less than 0, it indicates that the dissolved oxygen has been decreasing over multiple historical monitoring periods. If the slope of the dissolved oxygen trend is equal to 0, it means that the dissolved oxygen has no obvious trend in multiple historical monitoring periods. If the slope of the dissolved oxygen trend is greater than 0, it indicates that the dissolved oxygen has been on an upward trend over multiple historical monitoring periods. Based on the fact that dissolved oxygen levels have shown a downward trend over multiple historical monitoring periods, the time series of feeding activity and dissolved oxygen levels are timestamped together. The absolute value of the Pearson correlation coefficient formula was used to calculate the synchronous correlation between feeding activity and dissolved oxygen over multiple historical monitoring periods. If the synchronization correlation value is greater than or equal to the synchronization correlation threshold, it indicates that the reduced feeding activity of the released seedlings is caused by changes in dissolved oxygen levels. If the synchronization correlation value is less than the synchronization correlation threshold, it indicates that the decrease in feeding activity of the released seedlings is not caused by changes in dissolved oxygen levels. The purpose of analyzing the synchronous changes in dissolved oxygen levels and feeding activity of the released fry in this step is: Function 1: To quantify the correlation between dissolved oxygen levels and feeding activity, avoid bias in subjectively judging the causal relationship between the two, and achieve objective tracing of the causes.

[0021] Function 2: Based on the comparison of synchronous correlation values ​​and thresholds, it determines whether dissolved oxygen is the core trigger, transforms the correlation between dissolved oxygen and food intake into a quantitative standard, improves the reliability of trigger determination, and provides a basis for subsequent precise regulation; Step 4: If so, determine the feeding-related dissolved oxygen compensation amount by performing deviation analysis on the feeding activity of the released seedlings, and determine the dissolved oxygen regulation amount based on the feeding-related dissolved oxygen compensation amount and the dissolved oxygen safe range value. The absolute value of the difference between the feeding activity level and the feeding activity threshold is taken, and then the ratio is calculated with the feeding activity threshold to obtain the relative deviation of the activity level. Obtain the preset dissolved oxygen saturation value and dissolved oxygen critical value, and take the absolute value after subtracting the dissolved oxygen saturation value and dissolved oxygen critical value to obtain the dissolved oxygen safe range value. It should be noted that both dissolved oxygen saturation value and dissolved oxygen critical value are set by those skilled in the art based on historical experience. The dissolved oxygen critical value is the lower limit of the safe dissolved oxygen range, and the dissolved oxygen saturation value is the upper limit of the safe dissolved oxygen range. The purpose of setting the dissolved oxygen saturation value is to avoid the risk of oversaturation, which can lead to seedling gas bubble disease and increase the safety risk of aquaculture. The dissolved oxygen safe range value is multiplied by the relative deviation of activity, and then multiplied by the synchronization correlation value to obtain the feeding-related dissolved oxygen compensation amount. The dissolved oxygen compensation amount related to food intake is summed with the dissolved oxygen threshold value to obtain the dissolved oxygen target value. The current dissolved oxygen level is then obtained. If the dissolved oxygen target value is less than the dissolved oxygen saturation value, the difference between the dissolved oxygen target value and the current dissolved oxygen level is calculated to obtain the dissolved oxygen regulation amount. If the dissolved oxygen target value is greater than or equal to the dissolved oxygen saturation value, the difference between the dissolved oxygen saturation value and the current dissolved oxygen level is calculated to obtain the dissolved oxygen regulation amount. Based on dissolved oxygen regulation, the dissolved oxygen level in the temporary holding pond was rapidly regulated. Measures such as full-load operation of aeration equipment, isothermal and salinity water exchange, and emergency oxygenation agent assistance were used to alleviate the hypoxia stress of the seedlings. Subsequently, the causes of dissolved oxygen decline were investigated, and precise regulation was implemented to address issues such as excessive uneaten feed, high density, and poor water flow. This included cleaning and reducing feed intake, tiered dredging, and optimizing water flow to ensure stable feeding and safe temporary holding of the seedlings. The technical solution of this invention is as follows: During a preset monitoring period, the feeding process of the released fry in the temporary holding pond is monitored, and the feeding activity of the released fry is analyzed to determine whether abnormal behavior occurs. If abnormal behavior occurs, the feeding activity over multiple historical monitoring periods is obtained, and it is analyzed whether the feeding activity shows a downward trend. If a downward trend is observed, the dissolved oxygen level in the temporary holding pond over multiple historical monitoring periods is obtained. By analyzing the synchronous changes in dissolved oxygen level and the feeding activity of the released fry, it is determined whether the decrease in feeding activity is caused by changes in dissolved oxygen level. If so, by performing deviation analysis on the feeding activity of the released fry, the feeding-related dissolved oxygen level is determined. The oxygen compensation amount is determined based on the dissolved oxygen compensation amount associated with feeding, combined with the dissolved oxygen safety range value, to determine the dissolved oxygen regulation amount. This invention avoids subjective bias by aligning the timestamps of dissolved oxygen amount and feeding activity and conducting quantitative correlation analysis, thereby achieving objective tracing and reliable determination of dissolved oxygen inducing factors and providing data support for precise regulation. The dissolved oxygen regulation amount is calculated based on feeding activity deviation, dissolved oxygen safety range, and correlation strength, and an upper limit constraint is set to avoid the risk of gas bubble disease. Combined with two-step regulation of emergency oxygenation and root cause investigation, it effectively alleviates hypoxia stress in seedlings and stabilizes their feeding status. This improves the refinement and scientific nature of the temporary holding management of released seedlings, reduces aquaculture safety risks, ensures seedling quality, and helps improve the overall effectiveness of stock enhancement and release.

[0022] Example 2 Based on the same inventive concept as the method for adaptive temporary rearing of released seedlings in the foregoing embodiments, such as Figure 2 As shown, this application provides an adaptive temporary holding system for stock enhancement and release seedlings, wherein the system specifically includes: Anomaly detection module: During the preset monitoring period, the feeding process of the released seedlings in the temporary holding pond is monitored, the feeding activity of the released seedlings is analyzed, and it is determined whether the released seedlings exhibit abnormal behavior. Trend analysis module: If abnormal behavior occurs, obtain the feeding activity level over multiple historical monitoring periods and analyze whether the feeding activity level shows a downward trend; Synchronous change judgment module: If a downward trend is observed, the dissolved oxygen content of the temporary holding pond is obtained from multiple historical monitoring periods. By analyzing the synchronous changes of dissolved oxygen content in the temporary holding pond and the feeding activity of the stocked seedlings, it is determined whether the decrease in feeding activity of the stocked seedlings is caused by changes in dissolved oxygen content. Dissolved oxygen regulation module: If so, by performing deviation analysis on the feeding activity of the released seedlings, the feeding-related dissolved oxygen compensation amount is determined. Based on the feeding-related dissolved oxygen compensation amount and combined with the dissolved oxygen safety range value, the dissolved oxygen regulation amount is determined.

[0023] The foregoing has shown and described the basic principles, main features, and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited to the above embodiments. The embodiments and descriptions in the specification are merely illustrative of the principles of the invention. Various changes and modifications can be made to the invention without departing from its spirit and scope, and all such changes and modifications fall within the scope of the present invention as claimed. The scope of protection of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for the adaptive temporary rearing of seedlings released for propagation, characterized in that: include: During the preset monitoring period, the feeding process of the released seedlings in the temporary holding pond is monitored, the feeding activity of the released seedlings is analyzed, and it is determined whether the released seedlings exhibit abnormal behavior. If abnormal behavior is detected, obtain the feeding activity level over multiple historical monitoring periods and analyze whether the feeding activity level shows a downward trend. If a downward trend is observed, the dissolved oxygen levels in the holding ponds during multiple historical monitoring periods are obtained. By analyzing the synchronous changes in dissolved oxygen levels in the holding ponds and the feeding activity of the released seedlings, it can be determined whether the decrease in feeding activity of the released seedlings is caused by changes in dissolved oxygen levels. If so, by performing deviation analysis on the feeding activity of the released seedlings, the feeding-related dissolved oxygen compensation amount can be determined. Based on the feeding-related dissolved oxygen compensation amount and combined with the dissolved oxygen safe range value, the dissolved oxygen regulation amount can be determined.

2. The method for adapting and temporarily raising seedlings released for propagation according to claim 1, characterized in that: The process for determining the feeding activity level is as follows: A combination algorithm of background subtraction and morphological filtering is used to denoise the video image, retain the moving pixel blocks that conform to the body shape of the seedling, and use the identified moving pixel blocks as foreground pixels. The monitoring period includes the period before feeding and the period after feeding. By analyzing and processing the video frames of the period before feeding and the period after feeding, the average value of the foreground pixels and the total number of foreground pixels after feeding are determined. The duration of the peak value of the foreground pixel within the time period after feeding is recorded as the peak duration. The difference between the total number of foreground pixels after feeding and the average number of foreground pixels after feeding is calculated, and then the ratio is calculated with the average number of foreground pixels after feeding to obtain the relative intensity of the feeding response. The feeding activity level of the released seedlings was obtained by multiplying the relative intensity of the feeding response with the duration of the peak value.

3. The method for adapting and temporarily raising seedlings released for propagation according to claim 2, characterized in that: The process for determining the average value of foreground pixels after baiting and the total number of foreground pixels after baiting is as follows: Extract video frames from the period before feeding, divide the period before feeding into multiple pre-feeding time points according to equal time intervals, count the foreground pixels at each pre-feeding time point, sum and average the foreground pixels at all pre-feeding time points in the period before feeding, and obtain the average value of the foreground pixels before feeding. Extract video frames from the period after baiting, divide the period after baiting into multiple post-baiting time points according to equal time intervals, count the foreground pixels at each post-baiting time point, extract the peak value of the foreground pixels within the post-baiting period, and record it as the total number of foreground pixels after baiting.

4. The method for adapting and temporarily raising seedlings for propagation and release according to claim 3, characterized in that: The process for determining whether the released seedlings exhibit abnormal behavior is as follows: If the feeding activity level of the released seedlings is greater than or equal to the feeding activity threshold, then the released seedlings do not exhibit abnormal behavior; otherwise, the released seedlings exhibit abnormal behavior.

5. The method for adapting and temporarily raising seedlings for propagation and release according to claim 4, characterized in that: The process of analyzing whether feeding activity shows a downward trend is as follows: The feeding activity levels from multiple historical monitoring periods were integrated into a feeding activity time series in chronological order. A univariate linear regression was then performed on the feeding activity time series to obtain the trend slope of the feeding activity. If the slope of the feeding activity trend is less than 0, it indicates that the feeding activity has been declining over multiple historical monitoring periods.

6. The method for adaptive temporary rearing of released seedlings according to claim 5, characterized in that: The process of synchronously analyzing the changes in dissolved oxygen levels and feeding activity of the released fry in the temporary rearing pond is as follows: Extract and analyze the dissolved oxygen levels in the holding tanks for multiple historical monitoring periods to determine whether the dissolved oxygen levels showed a downward trend over these periods. Based on the fact that dissolved oxygen levels have shown a downward trend over multiple historical monitoring periods, the time series of feeding activity and dissolved oxygen levels are timestamped together. The absolute value of the Pearson correlation coefficient formula was used to calculate the synchronous correlation between feeding activity and dissolved oxygen over multiple historical monitoring periods.

7. The method for adapting and temporarily raising seedlings released for propagation according to claim 6, characterized in that: The process for determining whether the decrease in feeding activity of the released seedlings is due to changes in dissolved oxygen levels is as follows: If the synchronization correlation value is greater than or equal to the synchronization correlation threshold, it indicates that the decrease in feeding activity of the released seedlings is caused by changes in dissolved oxygen levels; otherwise, it indicates that the decrease in feeding activity of the released seedlings is not caused by changes in dissolved oxygen levels.

8. The method for adapting and temporarily raising seedlings for propagation and release according to claim 6, characterized in that: The process for determining whether dissolved oxygen levels show a downward trend over multiple historical monitoring periods is as follows: The dissolved oxygen levels in the holding tanks during multiple historical monitoring periods were integrated into a time series of dissolved oxygen levels. A univariate linear regression was performed on the dissolved oxygen time series to obtain the slope of the dissolved oxygen trend. If the slope of the dissolved oxygen trend is less than 0, it indicates that the dissolved oxygen has been decreasing over multiple historical monitoring periods.

9. The method for adaptive temporary rearing of seedlings released for propagation according to claim 8, characterized in that: The process for determining the food intake-related dissolved oxygen compensation is as follows: The absolute value of the difference between the feeding activity level and the feeding activity threshold is taken, and then the ratio is calculated with the feeding activity threshold to obtain the relative deviation of the activity level. Obtain the preset dissolved oxygen saturation value and dissolved oxygen critical value, and take the absolute value after subtracting the dissolved oxygen saturation value and dissolved oxygen critical value to obtain the dissolved oxygen safe range value. The dissolved oxygen safe range value is multiplied by the relative deviation of activity, and then multiplied by the synchronization correlation value to obtain the feeding-related dissolved oxygen compensation amount.

10. A method for adaptive temporary rearing of seedlings released for propagation according to claim 9, characterized in that: The process for determining the dissolved oxygen regulation amount is as follows: The dissolved oxygen compensation amount related to food intake is summed with the dissolved oxygen threshold value to obtain the dissolved oxygen target value. The current dissolved oxygen level is then obtained. If the dissolved oxygen target value is less than the dissolved oxygen saturation value, the difference between the dissolved oxygen target value and the current dissolved oxygen level is calculated to obtain the dissolved oxygen regulation amount. If the dissolved oxygen target value is greater than or equal to the dissolved oxygen saturation value, the difference between the dissolved oxygen saturation value and the current dissolved oxygen level is calculated to obtain the dissolved oxygen regulation amount.

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