136 results about "Fish growth" patented technology

The invention relates to the technical field of process control, in particular to an intelligent environment monitoring and adjusting system for lip fish culture, which comprises an environment parameter monitoring module, a multivariable linkage calculation module, a self-adaptive adjusting module, a fuzzy logic control module and an abnormity emergency response module. According to the method, the trend value is formed through time-phased grouping analysis and relevance calculation of the water quality parameters, dynamic prediction of the breeding environment change is achieved, the cooperative adjustment capacity among the dissolved oxygen, the water temperature and the ammonia nitrogen concentration is optimized through analysis of the multi-parameter linkage relation, the accuracy of environment control is improved, and the method is suitable for large-scale popularization and application. The cooperation efficiency of oxygen pump frequency and temperature control equipment response is improved through real-time matching calculation of equipment operation parameters, the rapid adaptive capacity to water quality changes is enhanced, abnormal fluctuation monitoring is combined with equipment linkage adjustment, rapid response during water quality sudden change is ensured, and the adverse effect of environment fluctuation on fish growth is reduced.

Disclosed is a reservoir ecological operation method integrating ecological flow process and water temperature process requirements of fish species, including: establishing a habitat model for a target fish species and deducing an ecological flow process of a lift history of the target fish species; calculating a critical spawning water temperature threshold and a critical gonadal development accumulated temperature threshold; establishing a multi-objective reservoir operation model to obtain flow process and water level after optimized reservoir operation; establishing a multi-objective reservoir ecological operation model integrating both the ecological flow process and the water temperature process, and calculating reservoir outflow water temperatures before and after the optimized reservoir operation; and calculating an improvement difference between the critical water temperature threshold and the accumulated temperature threshold of the target fish species on arrival dates after the reservoir ecological operation and those before the optimized reservoir operation.

The invention discloses a joint prediction and evaluation method for diseases and growth trends of cultured fishes, and relates to the technical field of intelligent aquaculture, and the method comprises the steps: collecting water quality data and fish growth health state data, and carrying out the normalization and standardization processing; and extracting feature variables based on the preprocessed data. According to the method, the multi-task learning model fusing the LSTM and the soft attention mechanism is constructed, the time sequence characteristics of the water quality parameters can be effectively captured, the time sequence characteristics are dynamically focused on key time points which have obvious influences on fish growth and diseases, and compared with a traditional single-task model or a shallow learning method, the method has the advantages that the time sequence characteristics are more accurate; compared with the prior art, the method has the advantages that higher prediction precision is shown when non-linear, high-time-sequence and frequent-fluctuation breeding environment data is processed, meanwhile, the model extracts universal features through a sharing layer, information interaction between different tasks is enhanced, the stability and generalization ability of the overall structure are improved, the over-fitting risk is reduced, and the method is suitable for various breeding scenes.

The invention discloses an intelligent pond feeding method and device based on machine vision, and the method comprises the steps: installing a high-definition waterproof camera at the bank of a pond, and enabling the installation position of the high-definition waterproof camera to guarantee that the real-time image of the whole culture water body can be shot; the method comprises the following steps: processing an image shot by a high-definition waterproof camera after feeding, determining a feeding desire value of cultured organisms in combination with an information entropy and an influence weight, quantifying a numerical relationship between active degrees of the cultured organisms after two times of feeding, and taking the numerical relationship as a basis for judging whether feeding is needed or not subsequently, and the working state of the material throwing device is automatically controlled. The working state of the feeder is controlled according to the quantitative result of two times of feeding, accurate feeding is achieved, under the condition that nutritional conditions needed by fish growth are guaranteed, more attention is paid to the welfare problem of fish, and good environmental conditions can be provided for fish school growth.

The embodiment of the invention discloses an intelligent collection system and method based on automatic measurement of fish growth data, and the system comprises a data collection module which is used for collecting fish image data, fish sound data and breeding environment data; the data transmission module is used for stably transmitting the data acquired by the sensing layer module to a data processing center through a wireless transmission technology; the data processing module is used for processing and analyzing the transmitted data and realizing fish target positioning segmentation, feature point detection, growth parameter calculation, weight estimation and growth cycle prediction; and the data management module is used for performing associative storage and visual display on the processing result and automatically generating an analysis report. According to the invention, the automation of fish growth data acquisition and analysis is realized, and the precision is greatly improved.

The utility model relates to the technical field of aquaculture, and discloses a domestication device for artificial fish compound feed, which comprises a support, the upper surface of the support is fixedly connected with a mixing barrel, the upper surface of the mixing barrel is provided with a top cover, the inside of the top cover is fixedly connected with a feeding hopper, and the outer wall of the feeding hopper is slidably connected with a sealing cover. A mixing assembly used for mixing feed is installed on the upper surface of the top cover, a quantifying assembly used for quantitative discharging is installed on the lower surface of the mixing barrel, a culture pond is arranged on the lower surface of the support, and a drainage plate is fixedly connected to the bottom of the inner wall of the culture pond. According to the automatic feeding device, manpower and cost are saved through automatic constant-speed and uniform-amount feeding, the motor drives the conical barrel and the arc-shaped plate to rotate, the domestication rate is increased, fish growth is promoted, the feeding amount is accurately adjusted according to the fish feeding condition, the valve is used for quantification, the threaded sleeve can replace feed with different block diameters, practicability is improved, and waste is reduced.

A device and method for estimating fish growth based on a modified fish growth model. The device includes a growth factor data input unit configured to receive growth factor data including an initial average weight Wi, a final average weight Wf, a total supplied feed amount F, and a rearing period D about a growth estimation target fish; a first growth information calculation unit configured to apply the growth factor data received from the growth factor data input unit to the modified fish growth model to calculate first growth information of the growth estimation target fish based on the modified fish growth model; and a display for outputting the first growth information calculated by the first growth information calculation unit on a screen thereof.

The invention discloses a portable fish appearance and weight information acquisition method and system, and relates to the technical field of fish appearance and weight, and the method comprises the following steps: step 1, appearance measurement and analysis, step 2, weight acquisition and analysis, and step 3, data processing. The stages of all fishes in the aquaculture area are identified, the growth speed and change trend of the fishes in different growth stages are visually known, individuals or groups with abnormal growth can be found in time, culturists can know whether the growth space of the fishes is sufficient or not in time, the culture density can be adjusted in time, and the survival rate of the culturists is improved. According to the method, the fish health problem caused by too high density is avoided, whether the growth state of each fish is abnormal or not is judged, the survival environment index of each fish in an aquaculture area is evaluated, more suitable survival and growth conditions are created for the fishes, fish growth is promoted, and slow growth or death of the fishes caused by uncomfortable environment is avoided.

The invention discloses an intensive ecological mandarin fish breeding system in a photovoltaic composite environment, which comprises a photovoltaic breeding area, an intelligent management and control center and an energy collaboration module, and is characterized in that a photovoltaic power station array is arranged in a space above the photovoltaic breeding area; the photovoltaic culture area is provided with at least one industrial culture group, each industrial culture group comprises a plurality of metal culture ponds, and each culture pond is of a round pond structure with an inverted conical bottom and a central sewage collection opening; the plurality of metal culture ponds are communicated through pipelines or diversion structures, and the intelligent management and control center comprises a data acquisition layer, a platform decision-making layer and an application control layer; the data acquisition layer is used for acquiring culture environment data in real time and comprises a water quality monitoring sub-module, a meteorological monitoring sub-module and a video monitoring sub-module; a mandarin fish growth regulation and control model is arranged in the platform decision-making layer, and the model is configured to be capable of processing data uploaded by the data acquisition layer and at least executing one of the following decisions.

The invention discloses a fish growth prediction method based on a depth nonlinear state space model, and belongs to the technical field of intelligent aquaculture. In the method, a fish growth depth state space model is established, a dynamic stage division mechanism is designed, and a different-speed growth gradient and an environmental cumulative effect are fused to construct a stage transition criterion; adaptive switching of model parameters is realized through a gating network, the problem of stage boundary fuzziness caused by traditional fixed threshold division is broken through, biological mechanism equations such as metabolic rate temperature response and density inhibition effect are embedded into a neural network, and interpretable coupling modeling of environment-management factors is realized through regularization constraint of a model parameter space; cross-scale causal association modeling is realized, a metabolism-growth cross-scale causal chain is constructed in combination with biometric prior, and the bottleneck that a traditional black box model cannot associate microscopic physiology and macroscopic growth is broken.

The invention relates to the technical field of aquaculture. The invention discloses a flounder fish growth discrimination system and method, and the method comprises the steps: employing a high-definition camera to carry out the multi-angle shooting of a cultured fish body, obtaining a non-shielding, non-overlapping and high-resolution cultured fish body image, building a YOLOv8 segmentation model, building a recognition module, enabling the recognition module to obtain a measurable parameter and a frame parameter based on a generated mask of the fish body, and carrying out the recognition of the measurable parameter and the frame parameter. After data correction is completed, variety analysis and identification are completed, variety information is input into the YOLOv8 model, and the growth condition of cultured fish bodies is judged according to the final growth conditions of the body thickness, the body length and the body width. According to the method, cultured fish body image segmentation is completed by establishing the YOLOv8 segmentation model, and after measurable parameters and frame parameters are obtained, automatic generation and discrimination are completed according to body thickness derivation results of different varieties, so that the efficiency and precision of culture management are improved, and the method is suitable for large-scale popularization and application. Powerful data support is provided for scientific feeding, feed optimization, growth regulation and control, disease early warning and the like in the breeding process.

The invention belongs to the technical field of biological medicines, discloses a preparation method of a pcDNA3.1-GH-loaded chitosan nanoparticle gene delivery system and an application of the pcDNA3.1-GH-loaded chitosan nanoparticle gene delivery system in fishes, and aims to solve the problems that the existing gene delivery technology is complicated in operation, the public are not trusted to transgenic foods and the growth rate of the fishes is low. The invention provides an oral chitosan nano-gene delivery system, which is characterized in that pcDNA3.1-GH-loaded chitosan nanoparticles are constructed by compounding a lateolabrax japonicus growth key gene gh with chitosan. Results show that the gene-loaded chitosan nanoparticles can effectively enter cells and realize the expression of exogenous genes, almost have no toxic effect, can achieve an instantaneous transgenosis effect without modifying the genome of an organism, and can significantly improve the growth performance of cultured fishes at the same time. The method has high efficiency, safety and economical efficiency, and provides a reproducible solution for industrialization of an aquaculture sex control technology.

The invention discloses a deepwater net cage fish feeding control method and system, and the method comprises the steps: generating a cultured fish detail list in a target deepwater region according to the fish information, and carrying out the multi-round spiced salt denoising processing of the obtained image data of the target deepwater culture region, inputting the underwater light data into the water body thermal stratification model to obtain each deepwater hierarchy and short wave radiation data corresponding to each deepwater hierarchy; and analyzing and identifying the image data through an AI graph identification algorithm to obtain fish growth data, constructing a feeding amount control model according to a cultured fish detail list, the fish growth data and the short-wave radiation data, and generating a culture visualization report to realize feeding control of fishes in the target deepwater culture area. Fish growth and health are analyzed through image data, a feeding control model is constructed and optimized according to data such as the ammonia nitrogen content, the dissolved oxygen content and short wave radiation, feeding amount control is optimized, the fish growth speed is increased, the fish growth quality is improved, and long-term sustainable breeding is achieved.

The invention relates to the technical field of aquaculture feed. According to the hermetia illucens protein peptide and the preparation method thereof, the hermetia illucens protein peptide prepared by adopting the technical scheme can be used as a feed protein source to replace most fish meal in feed, so that the use of the fish meal in aquatic feed is reduced, and the problems of shortage and insufficient supply of the fish meal are solved. The invention also provides application of the hermetia illucens protein peptide in preparation of functional feed for improving fish growth performance and fish muscle and meat quality. Fish functional feed prepared from the hermetia illucens protein peptide not only can significantly improve growth of rainbow trout, but also has no negative effect on oxidation resistance of animal livers and dorsal muscles, and can also improve muscle meat quality of rainbow trout.

The invention, which relates to the technical field of data monitoring, discloses a wireless multi-sensing data monitoring terminal system for smart rice and fishery, comprising a data setting module for setting an initial monitoring frequency; the environment monitoring module monitors the growth condition of rice and fish, soil data and the state of aquatic animals in real time, and captures the growth environment change of rice and fish in time; the data processing module is used for quantifying the change degree of the rice and fish growth environment according to the characteristic data related to the change of the rice and fish growth environment and the abnormality of the cultured object extracted by the environment monitoring module; the early warning module is used for predicting the growth environment change through a machine learning model, and automatically sending out an early warning signal when the rice and fish growth environment change is predicted to be abnormal; and the dynamic adjustment module dynamically adjusts the monitoring frequency of the monitoring equipment so as to cope with the change of the growth environment of rice and fish. According to the method, the environmental change rate is dynamically adapted by adjusting the monitoring frequency, so that the robustness, timeliness and decision accuracy of the system can be remarkably improved.

The invention relates to the technical field of aquaculture feed, and provides a compound feed additive for improving fish sugar utilization rate and promoting growth, the compound feed additive comprises the following raw materials by weight: 0.1-0.14 part of chromium picolinate, 1.5-2.5 parts of vitamin C, 20-40 parts of amylase, 20-40 parts of protease, 10-20 parts of dimethyl-beta-propiothetin, 2-4 parts of bile acid, and 18-22 parts of a carrier. The compound feed additive provided by the invention has the beneficial effects that the blood sugar is regulated, and the sugar metabolism capability of fish bodies is improved; due to the use of the compound feed additive, energy supply caused by protein decomposition is reduced, so that the growth performance of the fishes and the utilization rate of the feed are improved; the low-temperature stress resistance of the fishes is improved, and the breeding negative influence caused by temperature change is reduced; the protein loss is reduced; the feed cost is reduced; and the culture benefit is improved.

The invention provides an experimental analysis method for water flow speed regulation and control fish growth performance influence, which comprises the following steps: S1, experimental preparation: setting N experimental groups, placing M fishes in an experimental container in each experimental group, and numbering the fishes in sequence ID; s2, experiment management and operation: determining experiment management data; measuring the initial weight of each fish, and performing an experiment based on the experiment management data to obtain growth state parameters of each fish at each observation time point; s3, analyzing the influence of the water flow velocity on the growth performance of the fish by adopting a generalized linear hybrid model, wherein the fixed effect comprises the water flow velocity, time t and water flow velocity * time t; the random effect comprises a fish ID and an experimental group number; the response variables comprise multiple growth index parameters; establishing a function relation model between each response variable and the fixed effect and the random effect; calculating to obtain the coefficient of each fixed effect in the function relation model of each response variable; and S4, result analysis: analyzing the influence of the water flow velocity on each response variable.

The application discloses a fish resource monitoring method and system based on sonar images and electronic equipment, and the fish resource monitoring method comprises the following steps: acquiring sonar images of a fish pond; detecting fish targets in more than two frames of the sonar images and tracking the fish targets; and determining the number of the fish targets in the fish pond according to the tracking result. Through the above steps, the fish resource monitoring method can accurately monitor the number of the fish targets in the fish pond, and does not cause adverse effects on the growth environment of the fish during the monitoring process.

The invention discloses a fish growth state monitoring method and system based on underwater image recognition, and relates to the technical field of fish growth state monitoring, and the method comprises the following steps: setting a temperature sensing region around the optical axis direction of a camera device, and carrying out the real-time collection of the temperature change of a local water body in an underwater environment, acquiring temperature gradient data corresponding to the light propagation path, and generating temperature layered mapping according to the temperature gradient data; and on the basis of temperature hierarchical mapping, constructing a refraction track sequence on the light propagation path, and adjusting the refraction angle weight according to the temperature difference of each hierarchical region to form the light propagation path. According to the invention, through combination of temperature sensing and light field compensation, continuous tracking and space geometry reconstruction of a light propagation path are realized, and the image contour is kept clear and stable. Based on the dynamic smoothing processing of a time sequence stable chain and a form balance area, the fish body form is kept uniform in time and space, false growth transition is avoided, and the stability and accuracy of a monitoring result are improved.

The invention provides a peptide liquid enrichment and hydroponic irrigation intelligent fish and vegetable peptide integration method, which comprises the following steps: S1, obtaining a preset production strategy selected by a user through an input device, and obtaining an operation mode selected by the user; s2, according to the operation mode, adopting a multi-target collaborative optimization algorithm to generate operation instructions of a culture unit, a water culture unit and a peptide extraction unit; s3, sending the operation instruction to the culture unit, the water culture unit and the peptide extraction unit through a standardized interface, and obtaining the operation state of each unit; s4, adjusting a water flow parameter of the culture unit according to the running state, and generating a first water body state; s5, extracting bioactive peptides from the first water body state to generate a second water body state; s6, adjusting nutrient solution supply parameters according to the second water body state, and generating a plant growth state; s7, the treated third water body state flows back to the culture unit, culture parameters are adjusted, and the collaborative result of fish growth and water quality optimization is achieved.

The utility model belongs to the technical field of fish culture equipment, and particularly relates to a water environment simulation device based on fish AI (artificial intelligence) identification, which comprises a cylinder body, control tables, a lamp belt, a food leakage track, a food leakage box, a first motor and a screw rod in driving connection with the first motor, the lamp strip and the food leaking track are arranged at the top of the tank body, the two ends of the lamp strip and the two ends of the food leaking track are connected to the control tables on the two sides, the food leaking box is arranged on the food leaking track, the end of the lead screw penetrates through the food leaking box, when the first motor is started, the food leaking box is driven by the lead screw to walk in the food leaking track in a reciprocating mode, and a control panel is arranged on the control tables. The control module is used for controlling all parts on the console. According to the intelligent fish culture system, the fish growth environment is optimized, the culture efficiency is improved, intelligent simulation and accurate regulation and control of the fish culture environment are achieved, and the culture efficiency and the fish life quality are remarkably improved.

The application discloses a kind of fermented feed fermented by three strains of probiotics of Bacillus YA ( Bacillus sp ), yeast Y ( Saccharomyces cerevisiae ) and capsular red bacteria R3 ( Rhodobacter capsulatus ), and preparation method and application in aquaculture thereof, and viable count is not less than 1×10 7 CFU / g.The fermented feed is replaced ordinary feed according to certain proportion, and feeding result shows that aquaculture water quality is significantly improved after adding fermented feed, and fish growth performance, digestive enzyme activity, immunity, and muscle quality are also obviously improved.Using the feed in suitable range can shorten growth cycle, reduce cost, improve aquaculture environment, reduce antibiotic use, and improve muscle quality of farmed animals, with good economic and ecological benefits, simple fermentation process, low cost, and suitable for industrial large-scale production.

The utility model discloses a timed fish feed feeding device, and relates to the technical field of feeding devices. A storage hopper is erected at the upper end of the interior of the box body, a feeding hopper is erected at the bottom end of the interior of the box body, a discharging pipe matched with the discharging end of the storage hopper is arranged at the top of the feeding hopper, and a certain gap exists between the feeding end of the discharging pipe and the discharging end of the storage hopper. A plugging fluted disc is movably arranged in a gap between the storage hopper and the discharge pipe, a worker can drive the push-pull rod and the rack to move according to the growth condition of fishes and the change of seasonal temperature, and the rack synchronously drives the plugging fluted disc to rotate, so that the discharge holes with proper calibers are aligned with the storage hopper and the discharge pipe to correspond to different feeding amounts; by means of the original concentric multi-aperture fluted disc structure, small, medium and large feeding amounts can be achieved only by pushing the push-pull rod to switch gears, the box body does not need to be opened in the adjusting process, the feed feeding amount can be further refined by matching with the closing degree of the magnetic control valve, and the error rate is smaller than 3%.

The invention discloses gRNA (guide Ribonucleic Acid) and application thereof in constructing a new carp strain with a high 1alpha, 25-dihydroxy vitamin D3 level, belongs to the technical field of genetic engineering, and provides gRNA of which the nucleotide sequence is as shown in SEQ ID NO.1. The invention further discloses a preparation method of the gRNA, and application of the gRNA to construction of the new carp strain with the high 1alpha, 25-dihydroxy vitamin D3 level. The invention relates to an application of gRN A in construction of a new carp strain with a high 1alpha, 25-dihydroxy vitamin D3 level. The gRNA is applied to construction of a fast-growing disease-resistant carp new strain with the high 1alpha, 25-dihydroxy vitamin D3 level. A target spot of the cyp24a1 gene of the carp with high specificity is designed, gRNA is synthesized in vitro, the cyp24a1 gene capable of degrading the 1alpha, 25 (OH) 2D3 is quickly knocked out, a new carp strain with the high 1alpha, 25-dihydroxy vitamin D3 level is obtained, the 1alpha, 25 (OH) 2D3 has the functions of promoting fish growth and improving fish immunity, and the carp has important application value.

The application discloses a kind of fermented Chinese herbal medicine feed suitable for rice-fish integrated breeding mode and preparation method thereof, and the specific component and weight fraction of feed are as follows: imported fish meal 5 parts, soybean meal 22 parts, chicken meal 8 parts, peanut kernel cake 10 parts, rapeseed meal 10 parts, wheat flour 31.95 parts, soybean protein concentrate 5 parts, soybean oil 4 parts, vitamin C polyphosphate 0.1 part, choline chloride (50%) 0.2 part, premix (compound vitamins and compound minerals) 1 part, calcium dihydrogen phosphate 2 parts, lysine hydrochloride (78%) 0.35 part, methionine (99%) 0.2 part, threonine (98%) 0.2 part, compound probiotics 0.01 part, compound Chinese herbal medicine 0.2-2 parts.The base feed is mixed with strain activation liquid uniformly, then bagged, fermented moisture is regulated to 35%, and placed at room temperature for 5-7 days at 25 DEG C to obtain fermented Chinese herbal medicine feed suitable for rice-fish integrated breeding mode.The application adds compound probiotics and compound Chinese herbal medicine, which has the advantages of promoting fish growth, improving feed utilization, improving muscle quality and the like.

The invention discloses Rhodosporidium toruloides for aquatic feed and application of the Rhodosporidium toruloides to aquaculture, relates to the technical field of microorganisms, and particularly relates to Rhodosporidium toruloides Ho7-3 which can be applied to aquaculture, has the effects of improving fish intestinal digestive enzyme activity, immune response and an anti-oxidation defense system, and can be used for improving fish intestinal digestive enzyme activity, immune response and an anti-oxidation defense system. The growth performance of cultured fishes can be obviously improved.

This invention discloses a method for constructing a fast-growing, sterile zebrafish model, belonging to the field of fish animal model preparation technology. This invention is the first to discover the role of the CK gene in regulating fish growth rate and fertility: fish with simultaneous knockout of ck1 and ck2 genes exhibit rapid growth and gonadal abortion. Using the method provided by this invention, a fast-growing, sterile zebrafish model was successfully constructed. These zebrafish exhibited gonadal dysplasia and sterility, but also rapid growth. Compared to wild-type zebrafish, the 4-month-old double mutant zebrafish showed significantly increased body length and weight. The disclosed gene function and zebrafish model construction method can be used for breeding fast-growing, sterile fish varieties and studying related mechanisms, which is of great significance for improving the economic benefits of aquaculture and protecting ecological security.

The invention belongs to the technical field of aquaculture, and discloses application of chitosan oligosaccharide in preparation of fish feed for promoting fish growth and improving disease resistance of grass carp bodies. Chitosan oligosaccharide is found to be capable of promoting fish growth and improving the disease resistance of grass carp bodies. In the embodiment, chitosan oligosaccharide is added as an immunopotentiator, so that non-specific antioxidant enzyme expression of the liver of the grass carp can be effectively induced, and the autoimmunity of the grass carp is improved. The chitosan oligosaccharide can improve the intestinal flora structure of the grass carp. In the embodiment, the relative abundance of the clostridium of the 3% chitosan oligosaccharide addition group is remarkably higher than that of the control group, and the 3% chitosan oligosaccharide addition group is the most important bacterial genus of the clostridium, so that the chitosan oligosaccharide has a remarkable effect on improving the intestinal flora structure of the grass carp.

The invention belongs to the technical field of aquaculture biological growth, and particularly relates to a gene for regulating fish growth, application and a regulating method. The gene for regulating the growth of the grass carp is a myogenesis inhibition gene mdfi of a myogenesis regulatory factor (MRFs) family; the base sequence of the gene is shown in SEQ ID NO: 1. The invention discloses a method for promoting proliferation of fish muscle cells. The expression level or protein activity of mdfi genes in grass carp muscle cells is inhibited. The inhibiting effect of the mdfi gene in the muscle growth of the grass carp is systematically clarified for the first time, the individual growth of the grass carp can be effectively promoted by establishing an mdfi gene knockout technology, and a new technical means and a new gene target are provided for the genetic breeding of the grass carp.

The present invention provides a specific molecular marker, primer and kit for rapid identification of southern catfish, catfish and their hybrids. The primer sequences are shown in SEQ ID: No.1 and SEQ ID: No.2. The specific molecular marker is located in the gene gsdf The molecular marker for the southern catfish is 595 bp long, with the nucleotide sequence shown in SEQ ID No. 3. The molecular marker for the catfish is 522 bp long, with the nucleotide sequence shown in SEQ ID No. 4. The identification process of the present invention requires only the clipping of a small number of fin rays, extraction of genomic DNA, PCR amplification using the primers, and subsequent agarose gel electrophoresis. It also has high accuracy and is not restricted by fish growth, allowing sampling and identification at various stages of breeding. It can be widely used in scientific research and promotion institutions, seedling breeding farms, and aquaculture businesses. It can be used to identify seedlings of the three catfish species (southern catfish, catfish, and their hybrids) and to establish germplasm standards for the southern catfish, catfish, and their hybrids.