49 results about "Predation" patented technology

The utility model provides a rice and fish circulating feeding device with high protective property, which relates to the technical field of rice and fish feeding and comprises a feeding component, a circulating component is arranged on the side surface of the feeding component, a protective component is arranged at the top of the feeding component, the feeding component comprises a culture pond, and the protective component comprises a protective net. And one end of the protective net is connected with a winding roller, a rotating shaft penetrates through the interior of the winding roller, and a winding motor is installed at one end of the rotating shaft. The rotating shaft is electrically driven by the winding motor to rotate, so that the winding roller releases the protective net and pulls the protective net to cover the culture pond, effective protection is provided for fishes in the culture pond, predation of birds and the like is avoided, loss caused by predation of the fishes is reduced, and the service life of the culture pond is prolonged. The economic loss of farmers is reduced, the income of the farmers is further increased, meanwhile, stable growth and development of the fishes in the culture pond are guaranteed, and the culture yield and quality are improved.

The invention belongs to the technical field of environmental engineering, and discloses a predation-enhanced cascade fixed biological membrane sewage treatment process dual-environment-three-component coupling model. Metabolism of autotrophic microorganisms and heterotrophic microorganisms in activated sludge and a biological membrane and predation effects of protozoan and metazoan are comprehensively considered, on the basis of a mass balance principle, a substance conversion way in a biological predation enhanced sewage treatment reactor is analyzed, and dynamic changes of bacteria and pollutants are disassembled into diffusion, metabolism and predation processes; a material flow model framework is established, on the basis of an ASM1 activated sludge model and a biological membrane model, a primary animal predation model and a metazoan predation model are coupled, and a dual-environment-three-component coupling model is recreated. According to the method, the pollutant removal process and the dynamic change of the microbial community are dynamically simulated through multi-model coupling, and the method is suitable for optimizing the design and operation parameters of a sewage treatment reactor and particularly has remarkable application value in regulation and control of a cascade fixed bio-membrane reactor.

The application discloses a kind of control fishing yield seal population recovery potential evaluation method and device, it is related to marine ecological protection and restoration field, mainly includes: four steps of modeling, predation rate calculation, fishing quantity reduction stage determination and seal population recovery potential evaluation.The application is based on Ecopath model, by introducing predation rate parameter, dynamically adjusts seal food habit matrix, reduces the data requirement of modeling, realizes the quantitative evaluation of fishing control measure protection benefit, provides practical method tool for seal population recovery potential evaluation.Therefore the seal population recovery potential evaluation method and device based on control fishing yield provided by the application have good seal population recovery potential evaluation ability, and can be widely applied to marine biological population resource recovery potential evaluation field.

The present invention relates to an in-situ biological purification system and method for treating eutrophic water bodies. The purification system comprises several biological purification modules installed in-situ within the water body. Each biological purification module includes a passive protection unit and an active protection unit. The passive protection unit comprises a plurality of fixed fish-repelling isolation devices, which together form a zooplankton protection zone within the water body. The active protection unit comprises a mobile, pursuit-type active fish-repelling device. Advantageously, the in-situ biological purification system continuously repels fish through fish-repelling signals such as bubbles, sound, and light, thereby forming an in-situ zooplankton protection zone in a specific area of the water body. This system fully utilizes the natural water surface to create a protective habitat for zooplankton, reduces predation intensity, increases zooplankton survival rate, biomass, and the proportion of large individuals, and replenishes zooplankton biomass throughout the lake or reservoir, thereby rapidly depleting algae in-situ and achieving the ultimate goal of water pollution control and the protection and restoration of the aquatic ecological environment.

The application provides a breeding pond bird prevention device, which comprises a mounting framework and a protective net connected with the mounting framework; the mounting framework comprises two first supporting rods arranged in parallel with each other and two second supporting rods arranged in parallel with each other, the lower end of the second supporting rod is connected with an extension rod arranged at an angle with the second supporting rod and extending away from the first supporting rod; the protective net comprises a first net body, a second net body and a third net body connected in sequence; the two first supporting rods are connected through the first net body, the upper end of the first supporting rod and the upper end of the second supporting rod are connected through the second net body, and the upper end of the second supporting rod and the extension end of the extension rod are connected through the third net body. After the device is set, the first net body and the second net body can prevent birds from entering the shallow water area from the lower side of the third net body, the third net body forms a slope structure and covers the shallow water area, and birds can be prevented from standing on the shallow water area, thereby reducing the loss of fish and shrimp caused by bird predation.

The utility model relates to the technical field of freshwater fish breeding, and discloses a reservoir ecological freshwater fish rotifer preying device which comprises a material tank, a lower floating block for providing buoyancy is arranged at the bottom of the material tank, a motor is fixedly installed in the middle of the top side of the material tank, and six sets of discharging openings are formed in the bottom wall of the material tank in an array mode. A feeding assembly used for assisting in feeding rotifers is arranged in the material tank, a triggering assembly used for triggering and starting the feeding assembly is arranged in the middle of the supporting plate, and a photovoltaic panel used for providing power for all the components is arranged on the outer side of the material tank. Fish schools can be attracted to gather through the bionic bait, when the fish schools bite the bait, the guide rod can be driven to move downwards, so that the contacts make contact with one another, then the motor can be started, the gear disc rotates to drive the rotating rod to rotate, and then the spiral discharging rod is driven to rotate in the discharging opening to assist in rotifer throwing; therefore, fish schools can prey conveniently, and waste is avoided.

The utility model discloses a multi-chamber bait device which comprises a bait shell, the bait shell is provided with a trapping cavity and a trapping hole, the trapping cavity is communicated with the outside through the trapping hole, the bait shell is further provided with a plurality of trapping grooves formed in the bottom of the trapping cavity, the trapping grooves are mutually independent, and bait which is filled through a hot filling technology and has different ingredients is arranged in the trapping grooves respectively. The bait is tightly attached to the corresponding trapping groove. According to the multi-cavity bait device, the trapping grooves are formed in the bottom of the trapping cavity, and the bait with different ingredients is injected into the trapping grooves in a hot filling mode, so that the multi-cavity bait device can meet the predation preference of cockroaches of different varieties, and the trapping effect is good. And the baits are filled into the corresponding trapping grooves by adopting a hot filling process, so that the baits are tightly attached into the corresponding trapping grooves, and the situation that different baits roll and collide relative to the bait shell to cause odor mixing and influence the trapping effect is avoided.

The invention relates to the technical field of reservoir scheduling, and discloses a reservoir optimization scheduling method and device based on an improved piebald algorithm, and the method comprises the steps: constructing a reservoir optimization scheduling model; wherein the reservoir optimal scheduling model takes the water level of the hydropower station in each time period within the reservoir scheduling period as a decision variable; randomly generating an initialized population; wherein individuals in the initialized population represent the water level of the hydropower station in each time period within the reservoir dispatching deadline; iteratively updating the position of each individual in the initialized population by simulating the inhabiting and hovering behaviors, the diving behavior and the change of predation efficiency of the emerald; and when the iteratively updated population satisfies an iteration stop condition, determining an optimal reservoir scheduling scheme based on the iteratively updated population. According to the method, the problems of algorithm prematurity and local optimum can be effectively avoided, and the optimization efficiency of the reservoir scheduling scheme is improved.

This invention relates to the technical field of mandarin fish farming, and in particular to a feeding device for the domestication of mandarin fish, which is easy to operate and improves the predation efficiency of mandarin fish. It includes a mounting platform, a positioning ring, a storage box, a moving platform, a feeding tube, a feed pipe, a feeding block, a spring, and a drive mechanism. The positioning ring is coaxially mounted on the mounting platform. The storage box is coaxially rotatably mounted on the mounting platform via the positioning ring. Multiple sets of moving platforms are equidistantly slidably mounted on the bottom of the mounting platform. Multiple sets of feeding tubes are equidistantly mounted on the moving platforms. A feed pipe is installed at the inlet of each feeding tube. The feeding block is slidably mounted inside the shaft cavity of the feeding tube. Both ends of the spring are respectively connected to the feeding block and the shaft cavity wall of the feeding tube. The diameter of the shaft cavity of the feeding tube is slightly larger than the diameter of the feed pellets. The drive mechanism is mounted on the mounting platform and is respectively connected to the storage box and the multiple sets of feeding blocks.

The patented Animal Seed Deterrent System offers an innovative solution for protecting seeds from being eaten by animals such as rodents, wild boars, and birds. It uses fake seeds to attract animals and deter them from eating real seeds. These fake seeds are sown either before or at the same time as the real seeds and contain scents and materials that smell a certain way but are not suitable for consumption. The scents are permanently incorporated into the material to ensure long-term deterrence. In addition, the real seeds are coated with a special coating containing similar scents and materials to the fake seeds to enhance the deterrent effect.A unique feature of the system is that it takes bird predation into account. The fake seeds are visually similar to real seeds and are scattered on the surface to be found first by birds. This innovative method offers an effective, cost-efficient, and environmentally friendly solution for protecting seeds and promoting plant growth.

1. The name of the design product: wall-mounted predatory dish (NW-61). 2. The use of the design product: the design product is used for pet predation. 3. The design points of the design product: in shape. 4. The picture or photo that best indicates the design points: perspective view.

The application relates to the technical field of pest control, in particular to a natural enemy insect releasing device for forest pest control, which comprises a UAV body, a fixing seat fixed at the bottom end of the UAV body and a plurality of stainless steel pipe releasing barrels fixed at the bottom end of the fixing seat at equal angles. When the sealing cover plate is opened for releasing, the smooth material surface of the arc-shaped glass sheet contacts with insects, the surface of the arc-shaped glass sheet is free of fiber protrusions and has extremely low friction coefficient, crawling insects can smoothly climb to the releasing port, the climbing success rate is obviously improved, and the subsequent predation and breeding capacity is not affected. When the sealing cover plate is closed and releasing is not performed, the ground glass roller rotates to drive the ground glass surface to face the inside of the stainless steel pipe releasing barrel, sufficient climbing support points are provided for insects, the insects can climb to different heights of the inner wall of the stainless steel pipe releasing barrel, the problem that the insects are crowded and accumulated at the bottom of the stainless steel pipe releasing barrel is solved, and the body surface damage and suffocation risk caused by extrusion are avoided.

The invention relates to an omnivorous fish control method and application thereof, and belongs to the technical field of water ecological restoration. The invention provides a control method for omnivorous fishes. The control method comprises the following steps: putting carnivorous fishes into a small water body containing the omnivorous fishes; the mass ratio of the carnivorous fishes to the omnivorous fishes is 1: (1-3). According to the method, carnivorous fishes with a specific proportional relation are put into a small water body containing omnivorous fishes, so that the biomass of the omnivorous fishes can be remarkably reduced, a cascade effect is triggered, the predation of the omnivorous fishes on zooplankton is reduced, the biomass of the zooplankton is increased, the predation of the zooplankton on planktonic algae is increased, and the survival rate of the zooplankton is increased. Furthermore, the disturbance of omnivorous fishes to the bottom mud can be reduced, and the total suspended matter concentration is reduced, so that the effect of repairing the water quality is achieved.

The utility model belongs to the technical field of predatory mites, and particularly relates to a thrip predatory mite feeding device which comprises a base, a feeding box and a supporting device. The supporting device is arranged on the surface of the feeding box and the surface of the base and comprises a plurality of supporting plates, the supporting plates are inserted into the inner surface of the feeding box, a storage box is arranged on the upper surfaces of the supporting plates, two storage blocks are fixedly connected to the two sides of the storage box correspondingly, and a separating device is arranged at the bottom end of the base and comprises a water tank. The upper surface of the water tank is fixedly connected with the bottom end of the base. Supporting frames are fixedly connected to the four corners of the bottom end of the water tank. By arranging the whole device, predatory mites can be bred in a relatively uniform mode, so that large-scale breeding is facilitated, meanwhile, the position of the storage box can be conveniently adjusted so as to adapt to different breeding requirements, the breeding box can be conveniently disassembled and assembled through part of parts of the supporting device, and thus the breeding box can be conveniently cleaned.

The invention discloses an application of an lprR gene in regulating and controlling the predation capability of stenotrophomonas maltophilia. The invention provides a substance for inhibiting or reducing or down-regulating the content or activity of LprR protein, or a substance for inhibiting or reducing or down-regulating the expression of an LprR protein coding gene, and any one of the following applications: 1) improving the predatory ability of stenotrophomonas maltophilia; experiments prove that after the lprR gene is knocked out, the predatory ability of the mutant under the hungry condition is remarkably improved, the predatory ability of a complementary strain basically recovers to be consistent with that of a wild type, and in an NYG culture medium, the predatory ability of the mutant, the predatory ability of the complementary strain and the predatory ability of the wild type are not remarkably different.

The present invention discloses a shoal structure for attracting wading birds, comprising a shoal area formed by being constructed on the shore and surrounded by a shoal outer wall, wherein a microhabitat structure is arranged in the shoal area; a maze area is constructed in the shoal area, wherein the maze area consists of a main maze passage and a plurality of side maze passages connected thereto; a plurality of entrances and exits to the shoal area are arranged on the shoal outer wall; the microhabitat structure comprises an annular microhabitat enclosure constructed in the shoal area, wherein the area surrounded by the microhabitat enclosure forms a microhabitat water area, wherein a plurality of plant planting constraint rings are fixedly arranged in the microhabitat water area; the maze-style shoal structure can enrich surrounding suitable aquatic animals in the shoal area, thereby improving the predation efficiency of target wading birds, enhancing their population breeding capacity, expanding the animal landscape and ecological restoration effect, and at the same time providing convenience for the investigation and monitoring of surrounding wading birds, especially rare species of wading birds.

This invention relates to the field of forestry pest and disease control technology, specifically to an intelligent simulation system for the control effect of natural enemies in forestry pest and disease control. The system includes an ecological monitoring integration module, a behavior stage discrimination module, a predation rate inversion module, a stage index mapping module, and a parameter feedback correction module. Based on forest pest monitoring nodes, it analyzes the pest quantity information uploaded by the nodes and determines the sampling point location corresponding to signal changes. This invention integrates forest pest monitoring data, natural enemy activity, and environmental changes in a time series, and introduces behavior stage discrimination based on ecological state information. Combined with paired statistics of natural enemy behavior and pest quantity, it dynamically reveals the ecological response relationship under different behavior stages. The simulated data can automatically adjust the parameter set according to periodic monitoring differences, and the stage effects and trends are promptly mapped into management indicators, making the simulation of control effects more stage-discriminative and ecologically adaptable.

To provide the construction and a method of a natural farm that gives no stress to an aquatic organism, causes no risk of disturbing an environment due to escape, is safe, and has low costs by installing an escape and hiding place of a juvenile fish, protecting the juvenile fish, improving a survival rate of the juvenile fish, culturing the juvenile fish by natural predation of an organism, employing water quality with natural purification action, and culturing the juvenile fish in the same ecosystem as that in the ambient, and to create a rich fishing place in a coast by discharging deep ocean water onto a front layer of a sea level having poor nutrition.SOLUTION: Proliferation is achieved by protecting a juvenile fish by providing: a surrounding part provided in a land side water area of an offshore breakwater block, having no bottom surface, having a lower end edge portion always contacting a water bottom, and having an upper end edge portion always being over the water level; and a hiding place for a juvenile fish that has entered the place through a clearance part, that is provided in the surrounding part, and to and from which a juvenile fish can enter and exit and an adult fish cannot enter and exit, and by fertilizing the periphery of the surrounding part by a deep water upwelling device.SELECTED DRAWING: Figure 1

The present application relates to the field of fish farming early warning, in particular to a kind of intelligent isolation device and early warning method for carnivorous fish cannibalism based on machine vision.The device mainly includes a breeding tank, a visual acquisition module, a system control and data processing mechanism, and an array air curtain generating mechanism at the bottom of the tank.The visual acquisition module acquires real-time water images in the breeding tank.A posture perception network capable of outputting target spatial position and multiple structural key points is used in embedded terminal operation.The vector angle and Euclidean distance of fish spine are calculated in real time by extracting anatomical key points such as fish head, dorsal fin and tail handle.When the target fish presents a high-curvature attack posture, the system immediately locks the conflict area through coordinate mapping and drives the integrated micro-porous aeration pipe array to release compressed air, generating a vertical non-contact bubble barrier between the attacker and the victim, achieving physical isolation.The present application is suitable for fish farming.

The invention relates to the technical field of mechanical bird repelling, in particular to a mechanical arm for a bird repelling vehicle and a bird repelling method.The mechanical arm comprises a horizontal rotating platform fixed to a trolley, a telescopic rod is arranged on a rotating disc at the upper end of the horizontal rotating platform, and a bird repelling mechanism is arranged at the movable end of the telescopic rod and can simulate the predation action of a predator to repel bird flock; the bird repelling mechanism comprises a flexible bird repelling net with a vibrator and a bionic pattern, a flash lamp and a folding and unfolding mechanism, a rotating angle limiting device is arranged on the rotating disc, and meanwhile the invention provides a bird repelling method using the mechanical arm. The device achieves the technical effects that the actions and sound of the predator are effectively simulated, efficient repelling of the bird flock is achieved, solar power supply is more energy-saving and environment-friendly, and the rotation angle of the mechanical arm can be accurately controlled.

To provide an oyster cultivation method and an oyster raising tool which suppress predation damage by fish at the time of oyster larvae cultivation in the sea and reduce the number of attached organisms. [Solution] A method of cultivating oysters in the sea, characterized in that a rectangular sheet (11) with a mesh-like perforated surface and symmetrical curved depressions is attached to a hanging rope (R) that is suspended vertically in the sea, with its symmetry line (11m) facing vertically, and the oyster juveniles are placed inside the curved depression with the apex of the shell pointing vertically upward, and the juveniles are also symmetrical to match the symmetry of the curved depression, with the normal direction of their outer shells facing the diameter of the hanging rope (R), and then fixed in place for underwater cultivation.

The utility model belongs to algae-eating insect cultivation technical field especially relates to algae-eating insect screening cultivation device, including incubator and support leg, the support leg fixed mounting is in the cultivation box bottom all around, the inside of cultivation box is provided with cultivation device, the cultivation device includes screening mechanism, washes screening mechanism, cleaning mechanism and aeration mechanism, the screening mechanism sets up in the inside of cultivation box, washes screening mechanism and set up in the back of cultivation box, the cleaning mechanism sets up in the inside of cultivation box bottom, the aeration mechanism sets up in the inside of cultivation box lower extreme. This algae-eating insect screening cultivation device, through setting up screening mechanism, through the starting motor through output shaft drive disc rotation, disc rotation drives mounting seat one eccentric rotation under the action of ball head rod, pulls screening box and reciprocates along the guide rod left and right and shakes, thereby makes the young algae-eating insect to pass through screening box, realizes the separation of larva and adult, prevents adult predation larva, improves the algae-eating insect cultivation efficiency.

The invention discloses a grouper and penaeus vannamei three-dimensional symbiotic polyculture system and polyculture method, and belongs to the technical field of seawater net cage ecological culture. The system comprises a double-layer three-dimensional net cage, a middle-layer anti-predation separation net, a prawn three-dimensional attachment base, a feeding unit and a water body exchange unit, the net cage is divided into an upper-layer grouper culture area and a lower-layer prawn inhabiting area through the middle-layer anti-predation separation net, and the prawn three-dimensional attachment base is arranged on the lower layer for prawns to inhabit and shell. In the breeding process, grouper fries are put first, penaeus vannamei fries are put after 5-10 days, only the upper layer is fed with grouper feed, and the penaeus vannamei grows through residual feed, organic debris and plankton. Safe symbiosis of the groupers and the penaeus vannamei is achieved, predation is effectively prevented, the bait utilization rate and the unit water yield are improved, pollution and diseases are reduced, and the device has the advantages of being simple in structure, ecological, environmentally friendly and remarkable in benefit and is suitable for offshore net cage large-scale cultivation.

The invention provides a method for evaluating biological accumulation and ecological risks of a PFAS (perfluorooctanoic acid system) of an aquatic ecosystem, and aims to solve the problems caused by difficulty in sampling zooplankton and complex predatory relationship in species in nutritional level calculation and relieve excessive dependence of biological accumulation risk evaluation on toxicological experiments. Two new indexes (RTMF and RBMF) for evaluating the biological accumulation risk of the pollutants are constructed and are applied to evaluating the biological accumulation risk of the perfluorinated compounds in the water area to be evaluated. Results show that the nutrition level calculated by taking the submerged plant as the reference organism is 0.31 higher than the value based on the zooplankton, the difference between the nutrition level amplification coefficient and the biological amplification coefficient calculated by taking the submerged plant as the reference organism and the value based on the zooplankton is not large, and the submerged plant can effectively replace the zooplankton. According to the method, on one hand, the calculation precision of TL, TMF and BMF is remarkably improved, and on the other hand, the operation difficulty of sampling and analysis is effectively reduced.

The invention relates to the field of seedling domestication, and discloses an anti-stress capability enhancement and domestication method for enhanced and released seedlings, which comprises the following steps: respectively carrying out nutrition enhancement, environment domestication, endurance domestication and natural enemy anti-stress stimulation training on the enhanced and released seedlings, and outputting qualified enhanced and released seedlings. Wherein the anti-stress ability can be improved to the maximum extent by constructing the bionic natural enemy model to perform anti-stress stimulation training on the enhanced and released offspring seeds. According to the method, the physique and behavior adaptability of the released offspring seeds can be fundamentally improved, the live bait preying ability of the enhanced released offspring seeds is trained, the natural enemy avoiding ability is recognized, and the water flow adapting endurance is achieved, and the method is crucial to long-term survival of the enhanced released offspring seeds in the field. The anti-stress intensified domestication of the enhanced and released fries by simulating natural enemies and real natural enemies is also an anti-stress intensified training method with the highest efficiency.

The utility model discloses an adjustable feeding device for preventing waterfowls from grabbing food, which belongs to the field of waterfowl healthy feeding management and comprises a trough body, double-sided fences and supporting legs, the supporting legs are mounted on the side wall of the trough body, the double-sided fences are detachably mounted at the top end of the trough body, and the double-sided fences are detachably mounted on the side wall of the trough body. Gaps among the double-sided fences are used for enabling the heads and the necks of waterfowls to go deep into the trough body to eat food, so that the waterfowls are prevented from snatching the food. The device can avoid food grabbing as much as possible, reduce feed pollution and waste, guarantee nutrient intake of waterfowls, and promote health and growth of the waterfowls; meanwhile, the distance between the two-sided fences and the height of the trough body can be adjusted, so that the feeding equipment is wide in application object range, can be applied to waterfowls of various varieties and different growth stages, and has the advantages of universality, reasonable and simple structure device, easiness in production and manufacturing, convenience in use and easiness in popularization and application.

Frame to protect grass seed from predation by birds.

The invention belongs to the field of multi-nutrition-level polyculture ponds, and particularly relates to a trachinotus ovatus-penaeus monodon-blue crab multi-nutrition-level polyculture pond which comprises a pond body, a lower-layer separation net is slidably connected to the lower middle portion of the inner wall of the pond body, and an upper-layer separation net is slidably connected to the upper middle portion of the inner wall of the pond body. The lower end of the upper-layer separation net is fixedly connected with a plurality of evenly-distributed supporting legs, and the upper end of the upper-layer separation net is fixedly connected with a supporting rod. The upper-layer separation net, the lower-layer separation net, the dismounting and mounting mechanism and other structures are additionally arranged in the pond body, in the using process, the pond body can be divided into three layers for breeding through the upper-layer separation net and the lower-layer separation net, independent species can be separated, mutual predation among bred objects can be effectively avoided, and the breeding efficiency is improved. In addition, in the breeding process, the bottom of the pond body can be oxygenated through an air conveying pipe, a rotary oxygenation frame and other structures at the bottom, and oxygenation of the water body in the pond body can be more uniform.

The invention discloses a seal population recovery potential assessment method and device for controlling fish catch, and relates to the field of marine ecological protection and restoration, and the method mainly comprises the four steps: modeling, predation rate calculation, fishing amount reduction stage determination, and seal population recovery potential assessment. Based on the Ecopath model, the predation rate parameter is introduced, the seal feeding habit matrix is dynamically adjusted, the data requirement of modeling is reduced, quantitative evaluation of fishing control measure protection benefits is achieved, and a practical method tool is provided for seal population recovery potential evaluation. Therefore, the seal population recovery potential assessment method and device based on fish catch control provided by the invention have good seal population recovery potential assessment ability, and can be popularized and applied to the field of marine organism population resource recovery potential assessment.

The present application relates to the field of intelligent aquaculture and computer vision technology, in particular to a kind of abalone feed intake monitoring system based on image recognition, comprising: image acquisition module, for collecting high frame rate video stream data containing biological activity and feed distribution;Physical reference reconstruction module, based on initial feed characteristics, combined with fluid dynamics and dissolution parameters, deduce the theoretical evolution reference map of the current time;Behavior probability generation module, identify biological mouth key points and motion vectors, generate dynamic predation probability field;Double rail difference module, difference operation is carried out to real image and theoretical evolution reference map, and non-physical disappearance residual area is generated;Coupling verification module, residual area is mapped into probability field, and effective feeding behavior is determined based on spatial overlap degree;Data output module, according to the determination result, the accurate intake data is output cumulatively;The present application solves the counting problem caused by shielding, and significantly improves the monitoring robustness.