111 results about "Zooplankton" patented technology

The invention relates to the technical field of ecological health assessment, and discloses a lake and reservoir water ecological health assessment technical method, which comprises the following steps: S1, acquiring survey monitoring data of a lake and a reservoir, including biological data and water quality data, and constructing a lake and reservoir water ecological index system; s2, determining a score level according to a total standard score value of each hierarchical level index score of the lake and reservoir water ecological index system; and S3, determining the water ecological health level of the lake and the reservoir based on the score value corresponding to each score level. According to the invention, a comprehensive lake and reservoir water ecological index system is constructed based on various biological data and water quality data. The index system comprises multiple levels such as phytoplankton, zooplankton and organic matter, the ecological health state of the lake or reservoir can be comprehensively evaluated from multiple dimensions, and the limitation of single index evaluation is avoided.

A marine zooplankter identification method based on in-situ images and deep learning is used for processing a multi-stage series deep learning architecture constructed for all in-situ images, and comprises the following steps: quickly positioning and framing zooplankter individuals under a complex background based on a YOLOv8 skeleton construction model; performing pixel-level fine segmentation on individuals in the in-situ image by using a U-Net model, and extracting an accurate contour to obtain a high-quality individual image; and finally, inputting the image into a PlanktonNet network innovatively designed based on a ViT architecture, and through adaptive small-size slice embedding and introduction of a convolution word embedding layer, improving small-scale target feature extraction capability, and realizing high-precision and fine-grained classification of genera and species. The method has the advantages that target detection, semantic segmentation and recognition tasks are organically fused, the problems of low recognition efficiency and low automation degree in the prior art are effectively solved, and marine zooplankton can be quickly and accurately recognized from in-situ images on a large scale.

The invention particularly relates to a method for cultivating biological bait in an outdoor pond. According to the method, after an outdoor pond is disinfected and cleaned, a biological fertilizer source and various beneficial bacteria combination are used in a combined mode, cryptococcus ovale, composite diatom and chlorella are inoculated, a stable pond bacterium-algae system is constructed, and various cultivated microalgae are used for strengthening zooplanktons of rotifers, cladocerans and copepods in the bait pond. The breeding period of the biological bait is shortened, the survival rate of the biological bait is increased, the yield of the biological bait is increased, meanwhile, the nutritional value of the biological bait is enhanced, and opening breeding of the fry is facilitated. The breeding method is low in cost and suitable for various weathers, and sufficient bait guarantee is provided for large-scale breeding of fish fries.

The invention discloses an ecological restoration system for mangrove forest wetlands, and relates to the technical field of ecological restoration of coastal wetlands, and the technical key points are as follows: the ecological restoration system comprises an algae-cleaning biocenosis: the number of algae is reduced through salt-tolerant algae-cleaning organisms, and the transparency of a water body is improved; the sea grass plant community comprises Sichuan fructus viticis and halophila acuminata, absorbs eutrophic substances in water through photosynthesis, and further purifies the water quality; aquatic animals comprise fishes, benthonic animals, shrimps and filter-feeding zooplanktons; the mangrove plant community is used for planting bruguiera gymnorrhiza, kandelia candel and aegiceras corniculatum in a layered manner according to tide and water depth so as to realize the functions of purifying water quality of an ecological system and providing a habitat; and the environment monitoring module is provided with tide monitoring equipment, observes tide water level change and salinity and alkalinity, and implements early warning and emergency measures under extreme climate conditions. According to the method, a multi-layer producer community system can be coupled and repaired, the eutrophication problem can be effectively solved by multi-dimensionally improving the biodiversity, and a new method is provided for coastal wetland repair.

The invention provides a bay water health status evaluation method, device and product, and the method comprises the following steps: S1, determining a sampling site and collecting a zooplankton eDNA sample to obtain amplicon sequence variant information; s2, annotating amplicon sequence variant information to obtain species composition information and abundance data; s3, obtaining a first evaluation candidate index according to the species composition information and the abundance data; constructing a co-occurrence network and determining a second evaluation candidate index according to the network topology parameters; combining the first evaluation candidate index with the second evaluation candidate index to obtain a third evaluation candidate index; s4, selecting a reference point and a damaged point, and obtaining key evaluation candidate indexes through an artificial neural network model; and S5, constructing a zooplankton integrity index based on the key evaluation candidate indexes, and evaluating the water quality health grade according to the zooplankton integrity index. By utilizing the technical scheme, the precision of evaluating the ecological health condition of the severely polluted bay water body can be improved, and meanwhile, the complexity of an evaluation index system is reduced.

The invention discloses a machine learning-based zooplankton intelligent identification method and system. The method comprises the steps of constructing a target detection model for aquatic organisms based on deep learning; wherein the target detection model comprises an image fusion layer, a DenseNet network and a region candidate device RPN; performing multi-focus image fusion processing on the multi-dimensional image sample of the zooplankton by using the image fusion layer to obtain a fusion feature map; performing feature extraction on the fused feature map through the DenseNet network to obtain feature maps of different levels, and positioning target information of the feature maps; generating a plurality of candidate frames based on the target information by using a region candidate RPN, and performing screening through a non-maximum suppression method based on Giou to obtain a target candidate frame with the highest score; and the target detection model classifies and locates the target candidate box to realize zooplankter identification.

The invention discloses a multi-size aquatic organism bait culture method, which is characterized in that livestock and poultry waste extract liquid prepared by the culture method is used for co-culture of Rhodospiraceae bacteria and Chlorella algae, and the obtained algae is used for co-culture of zooplankton of Brachionidae and Harpacidae to finally obtain the multi-size aquatic organism bait. Compared with the harpacticoida cultured only by algae, the harpacticoida obtained by the culture method has the advantages that the EPA content is increased by 90.53%, the DHA content is increased by 13.47%, and the nutritional value is higher; a reasonable production system provides bait with multiple sizes, and the yield of chlorella algae, brachionus and harpacticoida is effectively increased; moreover, a new way for resource utilization of livestock wastes is provided, and efficient, environment-friendly and sustainable bait production is realized.

The present application relates to the field of sewage purification, and discloses a household micro sewage treatment system and a sewage treatment method, which comprises the following steps: building a septic tank; preparing a household micro sewage treatment system, an aeration system and suspended filler for microbial attachment; pumping clarified liquid by a lifting pump, and the clarified liquid enters a contact oxidation zone, and microorganisms degrade COD and BOD in the clarified liquid; the clarified liquid at the contact oxidation zone flows into an electrocoagulation zone, and electrocatalytic flocculation is performed; then, pollutants and phosphorus in the clarified liquid are filtered by a filtering zone, and the clarified liquid forms purified water; the purified water is taken from a water outlet zone, and is used for crop irrigation; or, a landscape zone for breeding aquatic plants or plankton is arranged at the water outlet zone. In the present application, the contact oxidation zone, the electrocoagulation zone, the filtering zone and the water outlet zone are sequentially and continuously arranged from bottom to top, and the arrangement structure of the whole household micro sewage treatment system is compact, and it is more convenient to arrange the system in a separate house environment in rural areas.

The invention discloses a method for analyzing the health condition of a layered lake and reservoir water ecosystem, and belongs to the technical field of water ecosystem analysis. The method comprises the following steps: arranging a plurality of sampling lines in a target lake reservoir in a thermal stratification period, dividing each sampling line into a surface layer, a middle layer and a bottom layer, and collecting a water sample of each layer of each sampling line; based on the water sample of each layer of each sampling line, obtaining a water quality evaluation index and an ecological evaluation index; dividing each sampling line into a reference point and a damaged point, and screening the ecological evaluation indexes based on the reference points and the damaged points to obtain a final ecological evaluation index; and on the basis of the final ecological evaluation index, calculating to obtain a final zooplankton integrity index of each sampling line, and dividing a final zooplankton integrity grade according to the final zooplankton integrity index of each sampling line. According to the method, the health conditions of the lakes and reservoirs are analyzed through zooplanktons, meanwhile, the vertical heterogeneity of the lakes and reservoirs in the thermal stratification period is considered, and objectivity and comprehensiveness are improved.

The invention belongs to the field of biological trapping and monitoring devices, and discloses a zooplankton trapping and monitoring device and a working method, and the zooplankton trapping and monitoring device comprises a trapping structure, a screening structure and a negative pressure generation structure. The capturing structure comprises a capturing bin body and a capturing inlet formed in the capturing bin body, and the capturing inlet is used for guiding zooplankton to enter the capturing bin body. The screening structure comprises a screening bin body, a one-way valve and a screen. The one-way valve is installed at an inlet of the screening bin body and used for controlling the communication state between the screening bin body and the capturing bin body. When the one-way valve is opened, the screening bin body is communicated with the capturing bin body, and zooplankton collected in the capturing bin body enters the screening bin body under the action of negative pressure; the screen is arranged in the screening bin body and divides the screening bin body into a plurality of bin bodies in sequence. The negative pressure generating structure communicates with the screening bin body and is used for generating a negative pressure environment in the screening bin body. When the negative pressure generating structure works, zooplankton in the capturing bin body is sucked into the screening bin body under the action of negative pressure.

The invention provides an aquatic bait biological feed as well as a preparation method and application thereof. Wherein the aquatic bait biological feed comprises a yeast raw material, amino acid raw powder and feed-grade fish oil; wherein the yeast raw material is selected from at least one of yeast metabolite, yeast powder, yeast hydrolysate or yeast cell wall dry powder. The components in the aquatic bait biological feed are appropriate in particle size, can be directly ingested and absorbed by zooplanktons such as rotifers and cladocerans, are easily digested and absorbed by the zooplanktons, and are beneficial to growth and reproduction of bait organisms. In addition, the feed raw materials do not have the problems of pathogenic bacteria and drug residues, and do not have toxicity to bait organisms.

The invention relates to a tail water purification ecological treatment process and structure, and relates to the technical field of tail water purification, and the tail water purification ecological treatment process comprises the following steps: S1, ecological enhancement area treatment: tail water is primarily purified through a composite ecological filter bed, an artificial aquatic plant purification zone, a three-dimensional ecological floating bed and a stain-resistant plant purification zone; s2, treatment in an ecological buffer area: introducing the effluent of the ecological enhancement area into the ecological buffer area, and carrying out secondary purification on the tail water by virtue of submerged plants in the ecological buffer area; s3, treating in an ecological display area, introducing the tail water treated in the ecological buffer area into the ecological display area, and purifying the tail water for the third time; and S4, treating an ecological stable area, constructing an aquatic plant community in the ecological stable area, adding zooplankton, benthonic animals and microorganisms to optimize the community, and purifying the tail water for four times. Fish participation is not needed, nitrogen is directly removed through microorganism-plant cooperation, animals only assist in removing impurities, no additional nitrogen load exists, and therefore the stability of the system can be improved.

The invention belongs to the technical field of aquaculture, and particularly relates to a breeding system for combined breeding of zooplankton and phytoplankton and a method for combined breeding of zooplankton and phytoplankton. By means of the breeding system, the phytoplankton releases oxygen and generates organic matter through photosynthesis, and abundant bait is provided for the zooplankton; the zooplankton is fed by the phytoplankton, nutritive salt in the generated waste is dissolved in water and becomes a nutrition source of the phytoplankton, high-density growth of the zooplankton and the phytoplankton is achieved in a limited breeding space, and land resources are effectively saved; and in combination with an intelligent monitoring system, water body environment parameters can be monitored and adjusted in real time, plankton is ensured to grow under the most suitable environment condition, the feed conversion efficiency is improved, and water body pollution is effectively reduced. The primer aquatic bacillus can increase dissolved oxygen in a water body, promote decomposition of organic matters in the water body and release of inorganic nutritive salt, and further support growth of phytoplankton.

An apparatus for detecting freely swimming zooplankton in a body of water, the apparatus comprising one or more light sources for emitting visible light and the apparatus being configured to direct a first light portion of the emitted light into the body of water to attract the freely swimming zooplankton towards a detection zone and to direct a second light portion of the emitted light onto the detection zone for illuminating zooplankton within the detection zone, the apparatus further comprising an imaging device configured to capture one or more images of one or more zooplankton present within the detection zone.

The invention relates to the field of ecological environment monitoring production, in particular to an efficient separation type ecological planktonic animal and plant collecting net which comprises a frame, the middle of the frame is provided with a first-layer net used for intercepting large sundries, and the top of the first-layer net is provided with a lifting hook. The bottom second-layer net is used for intercepting phytoplankton, the third-layer net located on the same axis with the inner side of the second-layer net is used for intercepting zooplankton, rotating force is generated through the propellers under the action of water flow, and the auger push plate is made to be of a conical structure and rotate on the inner side face of the third-layer net. One end of the corrugated plate on the outer side inclines along the inner side face of the third layer of net, plankton can be pushed to move in a dispersed mode to avoid local accumulation and blockage during rotation, the plankton can be accurately intercepted by means of component force, and the wave trough positions of the three corrugated plates are not located on the same horizontal plane to generate a staggered stirring effect, so that filtering is more comprehensive and uniform.

The invention relates to the technical field of monopterus albus fry breeding, and discloses a breeding method for improving the survival rate of monopterus albus fries, which comprises the following steps: (1) egg yolk breeding period: placing water hyacinth in a hatching frame, placing an air dispersing stone at the bottom of the frame, keeping a micro-flowing water state, breeding the monopterus albus fries in the hatching frame at 26-28 DEG C for 5-7 days after the monopterus albus fries are hatched out of membranes, after the egg yolk is completely absorbed, the larva fish later-stage cultivation is performed; (2) at the later stage of fry rearing, the fry are fed with zooplankter live bait for 2-3 days in an open mode; feeding the larva fish for domestication feeding for 3-5 days through tubificidae feeding after the larva fish is opened; (3) a cage culture period: firstly replacing the hatching frame with an indoor cage, continuing to feed with tubificidae for 7-10 days, and then transferring the larva fish into an outdoor cage to feed with tubificidae for 3-5 days; (4) a food conversion culture period: performing food conversion on the larva fish by using food conversion baits formed by mixed baits of tubificidae and micro-capsule materials; the feeding rate is 5-10%, and fish diseases are prevented and controlled daily. According to the scheme, the survival rate of ricefield eel fries is effectively increased to 70%, and the economic benefit of breeding is remarkably increased.

The invention provides a novel mudflat efficient photovoltaic breeding system. The novel mudflat efficient photovoltaic breeding system comprises an arc-shaped ditch bottom, a side ditch, a pool wall, floating objects, a duckweed growth layer, a photovoltaic panel frame, a photovoltaic panel, a pipeline, a control box, a photovoltaic panel support, a first-layer annular pillar lamp, a second-layer annular pillar lamp, a third-layer annular pillar lamp, a fourth-layer annular pillar lamp, a bottom table top and a sponge sleeve. The floating objects comprise phytoplankton and zooplankton, a storage battery, a control panel and a photoelectric detection device are arranged in the control box, the arc-shaped ditch bottom, the side ditch, the pond bottom, the pond wall and the bottom table top form a pond body mechanism facilitating fish gathering and fish lifting, and the photovoltaic panel support, the photovoltaic panel frame, the photovoltaic panel, the control box, the storage battery in the box and the control panel form a photovoltaic mechanism of the fishpond. The first-layer annular pillar lamp, the second-layer annular pillar lamp, the third-layer annular pillar lamp and the fourth-layer annular pillar lamp form a light supplementing mechanism beneficial to photosynthesis, namely growth of phytoplankton, growth of the phytoplankton is beneficial to growth of zooplankton, and growth of fishes is beneficial to growth of the zooplankton.

The utility model discloses a zooplankton sample separating device which comprises a bottom plate, a vertical plate is arranged at the upper end of the back face of the bottom plate, a lifting column is movably arranged on the front face of the vertical plate, a plurality of layers of lifting plates are evenly arranged on the lifting column, and detachable sample separating boxes are arranged in the lifting plates. A water collecting box is arranged at the upper end of the bottom plate, an opening is formed in the upper end of the water collecting box, and the opening is larger than the bottom of the sample separating box; the lifting column is driven by a driving device to ascend and descend. The driving device drives the lifting column to do reciprocating lifting motion, so that the lifting column drives the sample separation box to do reciprocating lifting motion through the lifting plate, the sample separation box has an up-down vibration effect, and sample separation of plankton by the sample separation box can be promoted; the sample separation box can be limited in the vertical direction through the limiting plate, the sample separation box can be limited in the front-back direction through the magnet block, the sample separation box can be prevented from moving when the driving device works, and meanwhile the sample separation box can be conveniently taken and placed.

The invention discloses a method for combining straw returning to field, pond fish culture and rice, fish and soft-shelled turtle / shrimp comprehensive planting and breeding, and belongs to the technical field of rice, soft-shelled turtle, fish and shrimp comprehensive planting and breeding. After rice in the rice field is harvested, straw is smashed and returned to the field, a hidden survival place is provided for crayfish seedlings, rotten straw and derived zooplankter provide bait for crayfish and fish, and the straw decomposition rate is increased by eating; after water in the rice field module becomes serious along with straw rotting, the water is discharged into the culture pond through tail water treatment engineering treatment, and the water fertility of the pond is increased; meanwhile, after eutrophication of the water body in the culture pond, the water body is discharged into the rice field after being treated by a tail water treatment project and flows into the culture pond again after being further purified by the rice field. According to the constructed mode, the straw is converted into the organic fertilizer through the crayfish and the fish, and the paddy field is adopted for purifying pond culture tail water. No breeding wastewater is discharged in the mode. The investment of aquatic product baits and rice field fertilizers is reduced, and the income and quality of rice and fishes are increased.

The present invention relates to: a feed composition for zooplankton, comprising biomass derived from Schizochytrium sp. microalgae; a method for culturing zooplankton using same; and an aquaculture method for fish or crustaceans. The biomass derived from Schizochytrium sp. microalgae of the present invention has the effect of nutritionally enriching zooplankton, and when zooplankton fed with the biomass is fed to fish or crustaceans, growth of fish or crustaceans is promoted and non-specific immunity is enhanced, and thus the biomass can be effectively used as a feed composition or a feed additive.

The present invention relates to an integrated microbial generation device, a mobile deployment vehicle, and a method, wherein the generation device includes an inlet water pretreatment module, a water quality monitoring and control module, an algae cultivation module, and a zooplankton expansion module, which are assembled in a box and connected in sequence. The algae cultivation module includes a multi-channel parallel pipeline algae cultivation component. The zooplankton expansion module includes an expansion tank, which is connected in sequence to a zooplankton capture component and a two-way pump through an external transmission pipeline. The inlet water pretreatment module, the water quality monitoring and control module, the algae cultivation module, and the zooplankton expansion module are all electrically connected to an integrated controller. The present invention has developed a set of microbial generation devices that connect in series the inlet water pretreatment, algae expansion, zooplankton expansion, and release. The device can be used for short-term closed cultivation for storage, transportation, and transfer, and can be deployed for long-term continuous expansion at a fixed point. It has good flexibility and can output algae and provide sufficient living zooplankton for aquaculture, water environment improvement, and water ecological restoration.

The invention provides a microorganism composite culture device and method, and belongs to the technical field of microorganism culture.The microorganism composite culture device comprises a frame, an algae pool, a microorganism culture pool and an algae-eating insect culture pool are sequentially arranged in the frame from inside to outside, a center cylinder is arranged in the middle of the algae pool, and a mounting partition plate is arranged in the lower end of the center cylinder; a water conveying device is arranged in the middle of the installation partition plate, the water pumping end of the water conveying device is located on the lower portion, the water drainage end of the water conveying device is located in the algae pond on the upper portion, the algae pond and the microorganism culture pond are separated through a first partition plate, a sunlight shed is arranged at the upper end of the first partition plate, and the microorganism culture pond and the algae-eating insect culture pond are separated through a second partition plate. A carrier frame is arranged in the microorganism culture pond; the algae pool, the microorganism culture pool and the algae-eating insect culture pool are distributed in the frame body, so that algae, bacterial microorganisms, corophium and algae-eating insects can be subjected to co-culture, and a compound microorganism culture system is constructed.

The invention relates to a zooplankton automatic enrichment and physiological phenotype and species identification integrated device, which comprises a zooplankton enrichment module, a physiological phenotype data acquisition module, a species data acquisition module and a data processing identification module, the physiological phenotype data acquisition module comprises an automatic sorting mechanism and a plurality of observation bins, the temporary storage bin is communicated with the observation bins through the automatic sorting mechanism, the species data acquisition module comprises a treatment liquid adding mechanism, a plurality of treatment bins, a sampling pump and a second collector, and the observation bins are communicated with the treatment bins in a one-to-one correspondence mode through pipelines provided with liquid supply pumps. The first collector and the second collector are both in signal connection with the data processing identification module. The method has the advantages that the efficiency of collecting and analyzing the basic information of the zooplankton in the water body is improved, and the pollution state and the future evolution pattern of the water body can be comprehensively predicted through the two-dimensional information of the physiological state and the variety diversity.

The invention relates to a method for generating a mask based on marine zooplankton instance segmentation, and the method comprises the following steps: 1, carrying out the pixel-level instance marking and preprocessing of an original marine zooplankton microscopic image, and obtaining sample data; 2, performing targeted fine adjustment and improvement to adapt to zooplankton scenes; and step 3, sending the sample data into the fine-tuned and improved neural network to obtain more accurate instance segmentation mask data of the marine zooplankton. Wherein the steps 2 to 3 are realized based on the convolutional neural network. According to the marine zooplankton instance segmentation mask generation method provided by the invention, more accurate instance segmentation mask data can be obtained under the condition of lacking semantic category information of zooplanktons, and end-to-end segmentation is realized.

This application relates to an ecological treatment process and structure for effluent purification, belonging to the field of effluent purification technology. It includes: S1, ecological enhancement zone treatment, where effluent undergoes preliminary purification through a composite ecological filter bed, artificial aquatic plant purification belt, three-dimensional ecological floating bed, and pollution-tolerant plant purification belt; S2, ecological buffer zone treatment, where effluent from the ecological enhancement zone is introduced into the ecological buffer zone for secondary purification by submerged plants; S3, ecological demonstration zone treatment, where the effluent treated in the ecological buffer zone is introduced into the ecological demonstration zone for tertiary purification; S4, ecological stabilization zone treatment, where an aquatic plant community is constructed in the ecological stabilization zone, and zooplankton, benthic animals, and microorganisms are introduced to optimize the community, resulting in a fourth purification of the effluent. This application eliminates the need for fish, relying on microorganism-plant synergy for direct denitrification. Animals only assist in removing impurities, resulting in no additional nitrogen load and thus ensuring the stability of the purification system.

The invention discloses a biological algae-control comprehensive water purification device suspended in water. The device comprises a plant purification floating layer, a filter material water purification filter layer and a biological algae-control water purification layer, the plant purification floating layer comprises a floating body and emergent aquatic plants arranged on the floating body; the filter material water purification filter layer comprises a filter material box and a water purification filter material; the biological algae control water purification layer comprises a zooplankton water purification cultivation box and zooplankton cultivated in the zooplankton water purification cultivation box; an air inlet, a water inlet and a water outlet are connected to the zooplankton water purification cultivation box, an aeration pipe is arranged in the zooplankton water purification cultivation box, and the aeration pipe is connected with the air inlet; and the upper end pipe orifice of the water inlet pipe is positioned in the middle-upper algae water area. The biological algae control comprehensive water purification device suspended in water can complete the tasks of reducing the density of algae in a water body, reducing the content of nitrogen and phosphorus in the water, improving the water landscape and the like.

The invention discloses a three-dimensional ecological fishpond culture system in the field of aquaculture. The three-dimensional ecological fishpond culture system comprises the following steps: 1, wastewater collection and pretreatment; 2, sterilizing and preparing a culture medium; 3, live bait is cultured in the runway type culture tank; 4, a water circulation system and continuous filtration; and 5, artificial wetland treatment and pasture planting. According to the breeding system, wastewater generated after breeding is treated, the water quality is improved, sterilization treatment is conducted, appropriate nutritional ingredients are added, and then the wastewater is discharged into the breeding tank containing microalgae and zooplankton to provide needed nutritional ingredients for the microalgae and the zooplankton, so that the microalgae and the zooplankton are massively bred in the water body, bait is brought to fishes in the constructed wetland, and the quality of the fishes in the constructed wetland is improved. The mode that bait is input depending on the outside in traditional cultivation is changed, self-sufficiency of green bait is achieved, and dynamic balance and efficient cyclic utilization of water are achieved.

The utility model relates to a water conservancy comprehensive information monitoring device for planktonic animals and plants, which belongs to the field of sampling devices and comprises a solar panel. A plurality of buoys are arranged on the solar panel; the floating cylinder comprises an upper cylinder, a lower cylinder and an upper cylinder, wherein a first cavity is formed in the upper cylinder; a top hole is formed in the upper surface of the upper cylinder, and a cover plate is arranged at the top hole; a second cavity is formed in the lower cylinder; water permeable holes; various types of sensors are respectively mounted on the upper surfaces of the second cavity and the upper cylinder; wherein collection assemblies are arranged in the two floating barrels, each collection assembly comprises a water drawing pipe, a water drawing pump, a water outlet pipe and a sampling barrel, and a connector A and a connector B are arranged on the side wall of each sampling barrel; and one end of the liquid outlet pipe is connected and communicated with the liquid outlet end of the stationary liquid pump, and the other end of the liquid outlet pipe is detachably connected with the connector B. The detection device can automatically collect zooplankton water samples and phytoplankton water samples, and can automatically add stationary liquid.

The invention relates to an analysis method for branches of a plankton model with an Allee effect of algae, and belongs to the field of prediction and simulation of an algae-zooplankton model in a marine ecosystem. According to the method, the influence of the Alle effect and toxin release of algae is considered, a biological mathematical model about algae-zooplankton is established, and the actual biological significance of the number of model research object populations is determined; sufficient conditions for existence of an internal equilibrium state and local asymptotic stability of the model are given; and taking the growth rate of the algae as a branch parameter, and providing sufficient conditions for the model to generate saddle node branches and transcritical branches. According to the branch analysis method of the algae-zooplankton model based on the Alle effect and toxin release influence of the algae, the periodic evolution law of the population number of the algae and the zooplankton in the aquatic environment can be obtained, and the influence of the growth rate of the algae on the population number is known; and the method has positive guiding significance on the treatment of the marine ecological environment.

The application relates to the technical field of zooplankton culture, and discloses a culture method of cladoceran zooplankton and application of a blue light source, which comprises inoculating cladoceran zooplankton in a culture water body and feeding microalgae to culture the cladoceran zooplankton until the cladoceran zooplankton reaches a harvestable density; and during the culture process, the culture water body is irradiated with a blue light source in a light-dark alternating mode. On the basis of conventional water quality management and microalgae feeding, the culture water body of the cladoceran zooplankton is irradiated in a light-dark alternating mode by using a blue light source with a specific wavelength, the internal reproduction mechanism of the cladoceran zooplankton is regulated and optimized through the irradiation stimulation of the specific narrow-waveband blue light source, the population density of the cladoceran zooplankton is effectively improved, and the culture yield and production efficiency of the cladoceran zooplankton are significantly improved.