47 results about "River prawn" patented technology

The invention relates to the technical field of phenotype measurement in aquatic genetic breeding, in particular to a macrobrachium rosenbergii small-size shrimp high-throughput phenotype measurement method and measurement system. According to the method, a camera obscura environment is constructed through a white shooting bottom plate, a dark extinction inner wall and an LED area array light source in a measuring box body, and illumination is adaptively adjusted by combining rough segmentation of a preview and analysis of a local gray histogram, so that stable bimodal gray distribution is formed between a shrimp body and a background. On the basis, a segmentation-key point combined deep learning model is adopted, a shrimp body mask and a standard key point are output at the same time, topological consistency loss constraints of a framework side length proportion and an included angle are introduced in training, and key point mismarking and drifting caused by the transparent body color are remarkably reduced. According to the method, rapid, non-contact, high-precision and high-throughput measurement of macrobrachium rosenbergii small-specification individual phenotype parameters and weight is realized, and a high-quality structured phenotype database is provided for genetic evaluation and multi-character combined selection.

The application discloses a kind of high-activity mysis of macrobrachium rosenbergii screening method, belong to aquaculture technical field.The method includes: pre-treatment of immersion washing, using 100 mesh nylon net to catch I stage mysis, stirring treatment in the first immersion washing container containing 100ppm formaldehyde and 6 ‰ brackish water;First light source induction screening, using 580-595nm, 1500-2000lux LED light source induction above second immersion washing container, and high-activity I stage larvae that float up are collected in batches;Disinfection treatment, after soaking with 20-30ppm povidone iodine, rinse;Again light source induction screening, after the larvae are developed into II stage after constant temperature cultivation at 28-30 DEG C for 24 hours, again light source induction is carried out and high-activity II stage larvae that float up are collected in batches;Finally, concentrated cultivation is carried out.The application realizes the high-efficiency, standardization sorting of high-activity mysis by the combination of specific wavelength light source induction and twice screening before and after key development period, and optimizes immersion washing, disinfection and cultivation parameters, significantly improves the quality of seedling and the survival rate of seedling.

The present application belongs to the field of aquaculture, and particularly relates to a large-specification red paste Macrobrachium rosenbergii breeding method, which comprises the following steps: S1, seedling marking: seedlings are raised in a greenhouse, a pond, an adjustable feed throwing device and a networked automatic feed checking table are arranged in the greenhouse; the feed feeding amount of the adjustable feed throwing device is adjusted through feedback of the networked automatic feed checking table; water quality is adjusted by using micro-ecological preparation and bottom modification preparation; S2, initial screening of male and female: when the marking time is 45-50 days and the average specification reaches 1800-2000 tails / kg, initial screening of male and female is performed to reduce the density of the Macrobrachium rosenbergii in the greenhouse; S3, outdoor pond raising; S4, red paste fattening: female Macrobrachium rosenbergii are fattened with red paste, nutrition fattening feed is fed on Monday, Wednesday and Friday every week, snail meat, carrots and corn are used to replace part of the feed in turn, the replacement proportion is about 50%-60%, normal feed is fed at other times, the fattening period is 4-6 weeks, and the Macrobrachium rosenbergii are caught in late September to early October.

The invention relates to the technical field of pomacea canaliculata resourceful treatment and aquaculture, in particular to a macrobrachium rosenbergii breeding method based on pomacea canaliculata resourceful treatment. The method comprises the following steps: sequentially carrying out multi-stage purification on captured ampullaria gigas through temporary culture emptying, circulating micro-flowing water washing and EM bacterial liquid soaking, then integrally crushing the ampullaria gigas into ampullaria gigas meat paste, adding table salt and / or organic acid, and then mixing the ampullaria gigas meat paste with a vitamin-rich plant raw material and a vitamin mineral premix according to a ratio; and the soft pomacea canaliculata block bait which is not easy to foam and scatter is formed by extrusion or compression molding in cooperation with a hydrophilic gel binder. In a breeding pond of the macrobrachium rosenbergii, the soft block bait is matched with compound feed for the parent macrobrachium rosenbergii for precise feeding according to a limited proportion and a limited period of time, and the feeding amount and water change are dynamically adjusted in combination with water quality indexes, so that the gonad development and reproductive performance of the macrobrachium rosenbergii are improved, the water quality is stabilized, and the bait cost is reduced.

The invention discloses a compound probiotic preparation for breeding macrobrachium rosenbergii as well as a preparation method and application of the compound probiotic preparation, and relates to the technical field of microorganisms, the compound probiotic preparation comprises the following active strains: Lactococcus gasseri, Bacillus subtilis and Nitrobacter winogradski, and the compound probiotic preparation comprises the following active strains: Lactococcus gasseri, Bacillus subtilis and Nitrobacter winogradski, and the compound probiotic preparation comprises the following active strains: Lactococcus gasseri, Bacillus subtilis and Nitrobacter winogradski. Wherein the preservation number of the lactococcus format is CGMCC (China General Microbiological Culture Collection Center) No.31024. According to the physiological requirements of different development stages of the Z1-Z4 stage and the Z5-P1 stage of larvae, 2: 1 and 2: 1: 1 bacterial strains are adopted for staged accurate addition respectively, meanwhile, artificial seawater of a specific formula is matched, baits such as fairy shrimps and egg custard are quantitatively fed according to the development stage, key water quality indexes such as dissolved oxygen, ammonia nitrogen and nitrite in a water body are strictly regulated and controlled, and the quality of the larvae is improved. A green seedling raising technical system integrating probiotic micro-ecological regulation and control, precise nutrition supply and water quality management is formed, and finally the effects of improving the survival rate of larvae, reducing the metamorphosis rate, promoting growth and development and replacing antibiotics for use are achieved.

The utility model provides a grading screen for breeding macrobrachium rosenbergii larvae, which comprises a base, an arch-shaped mounting frame is fixedly mounted at the top of the base, a grading screening mechanism for the macrobrachium rosenbergii larvae is arranged on the inner side of the arch-shaped mounting frame, a water collecting tank is fixedly mounted at the top of the base, and a collecting tank is arranged at the top of the water collecting tank. And the macrobrachium rosenbergii larva grading screening mechanism comprises three screening grooves which are vertically placed, nylon filter screens are fixedly installed at the bottoms of the screening grooves, inserting grooves are formed in the right sides of the screening grooves, baffles are arranged in the inserting grooves in a penetrating and inserting mode, and two circular connecting rings are fixedly installed on the inner side of an arch-shaped installation frame. The base is arranged to achieve installation of the water collecting tank, the water collecting tank is arranged to collect and discharge water, and the macrobrachium rosenbergii larva grading screening mechanism is arranged to achieve grading filtering of macrobrachium rosenbergii larva. Further, larvae of macrobrachium rosenbergii with different sizes are separated, so that the survival rate during subsequent culture can be increased.

This invention discloses a method for co-culturing giant freshwater prawns (Macrobrachium rosenbergii) with shrimp, grass, and fish based on probiotic regulation, and its application. This invention constructs a three-dimensional ecological system with shrimp as the main body, grass as the protector, and fish as a supplement. Elodea and water spinach purify the water, silver carp and crucian carp decompose uneaten feed and feces, and a compound microbial preparation of Lactococcus gasseri C6a2 regulates water quality, while a biological bottom conditioner improves the bottom sediment, achieving precise ecological regulation of the aquaculture environment. This invention does not rely on chemical agents, effectively inhibits ammonia nitrogen accumulation, reduces disease incidence, and significantly improves the survival rate and size of giant freshwater prawns, achieving a win-win situation for both ecological and economic benefits.

The present application belongs to the field of biotechnology and genomics, and particularly relates to a method and system for determining the chromosome base number of Macrobrachium rosenbergii based on multi-omics joint analysis. The method obtains de novo assembly sequencing data and Hi-C sequencing data, generates a chromosome-level candidate assembly without presetting the number of chromosomes by using Hi-C interaction signals after primary assembly, and performs whole-genome collinearity alignment with no less than two published reference genomes; in combination with quality constraints such as collinearity continuity, Hi-C boundary characteristics and BUSCO / LAI, the candidate chromosome boundary is comprehensively judged and iteratively converged, and finally the chromosome base number and reviewable evidence chain are output. The embodiments show that the present application can identify and correct the number redundancy caused by over-splitting of the reference genome, determine the base number of Macrobrachium rosenbergii as n=57 (2n=114), and improve the objectivity and reliability of base number determination.

The invention belongs to the field of biotechnology and genomics, and particularly relates to a method and system for determining the chromosome cardinal number of macrobrachium rosenbergii based on multi-omics conjoint analysis. According to the method, de novo assembly sequencing data and Hi-C sequencing data are obtained, after primary assembly is completed, chromosome-level candidate assemblies are generated under the condition that the number of chromosomes is not preset through Hi-C interaction signals, and whole-genome collinearity comparison is carried out on the chromosome-level candidate assemblies and no less than two disclosed reference genomes; and in combination with quality constraints such as collinearity continuity, Hi-C boundary features and BUSCO / LAI, carrying out comprehensive decision and iterative convergence on candidate chromosome boundaries, and finally outputting chromosome cardinal numbers and reviewable evidence chains. The embodiment of the invention shows that the method can identify and correct the number redundancy caused by the over-resolution of the reference genome, determines the cardinal number of macrobrachium rosenbergii as n = 57 (2n = 114), and improves the objectivity and reliability of cardinal number determination.

The present application relates to the technical field of phenotype measurement in aquatic genetic breeding, and particularly relates to a high-throughput phenotype measurement method and system for small-sized Macrobrachium rosenbergii. In the measurement box, a dark box environment is constructed by a white shooting bottom plate, dark light-absorbing inner walls and an LED surface array light source, combined with preview graph rough segmentation and local gray histogram analysis, to adaptively adjust the light to make the shrimp body and the background form a stable bimodal gray distribution. On this basis, a segmentation-key point joint deep learning model is used to simultaneously output the shrimp body mask and standard key points, and the topological consistency loss constraint of the skeleton side length ratio and the included angle is introduced in the training to significantly reduce the key point mislabeling and drift caused by transparent body color. The present application realizes the rapid, non-contact, high-precision and high-throughput determination of the phenotype parameters and weight of small-sized Macrobrachium rosenbergii individuals, and provides a high-quality structured phenotype database for genetic evaluation and multi-trait joint selection.

The application discloses a method for predicting and breeding Macrobrachium rosenbergii chela ratio based on phenomics analysis, comprising the following steps: selecting a plurality of Macrobrachium rosenbergii for multi-generation breeding, recording pedigree data of each individual, and constructing a Macrobrachium rosenbergii breeding database; extracting the phenotypic characteristics of Macrobrachium rosenbergii at different breeding stages, analyzing the relationship between the growth index and the chela ratio, and evaluating the genetic force to construct a Macrobrachium rosenbergii phenomics network; analyzing the growth path of Macrobrachium rosenbergii, identifying abnormal events during breeding, and generating a Macrobrachium rosenbergii growth trend network; constructing a Macrobrachium rosenbergii phenotype knowledge graph, and constructing a Macrobrachium rosenbergii chela ratio prediction model; collecting early phenotype data of the Macrobrachium rosenbergii population to be bred, making breeding decisions, and recommending breeding paths for the breeding individuals by using the Macrobrachium rosenbergii phenotype knowledge graph. Whether the breeding path is deviated in the breeding process is analyzed at the same time, and a correction scheme is formulated and pushed, so that the breeding cycle of Macrobrachium rosenbergii is shortened, and the accuracy and efficiency of breeding are improved.

The invention discloses a macrobrachium rosenbergii fry breeding method based on concentrated natural seawater, and relates to the technical field of aquaculture breeding, and the method comprises the following steps: S1, selecting surface seawater of a sea area of the northern bay of Guangxi, and sequentially carrying out pretreatment, concentration treatment and retreatment to obtain concentrated seawater; the pretreatment comprises precipitation, precise filtration and sterilization; the concentration treatment adopts a reverse osmosis method or is combined with a double-effect evaporation method, and the seawater is concentrated to 1 / 3-1 / 5 of the original volume; the retreatment comprises the following steps: adjusting the pH value to 7.8-8.2, adding an EDTA-2Na chelating agent, and carrying out precise filtration; s2, performing differential precipitation, three-stage gradient filtration and compatibility pre-detection on the selected water source to ensure that the turbidity of dilution water is less than or equal to 3NTU, the pH is 7.5-8.0, the ammonia nitrogen is less than or equal to 0.02 mg / L, and the residual chlorine is equal to 0mg / L. According to the method, through whole-course water quality management and staged accurate feeding, efficient, stable and green breeding from larvae to juvenile shrimps is achieved.

The invention relates to the field of material science and engineering, and particularly discloses a screening method of an anti-macrobrachium rosenbergii iridovirus natural compound based on an MCP protein target. The method comprises the following steps: constructing a three-dimensional structure of a virus major capsid protein MCP and determining an active pocket; performing structure pretreatment on the natural compound library; by taking the active pocket as a target spot, performing multiple rounds of virtual screening through molecular docking to obtain a candidate compound with binding energy less than or equal to-10.0 kcal / mol; and establishing a macrobrachium rosenbergii artificial infection model, determining the virus inhibition rate and protection rate of the candidate compound, and screening the active compound. The eugenol, the amentoflavone, the polyphyllin II and the solamargine screened by the method show a remarkable antiviral effect in an in-vivo injection test and breeding verification. According to the method, accurate screening from target spot prediction to in-vivo verification is realized.

The invention relates to the field of aquaculture, in particular to a macrobrachium rosenbergii breeding method based on compound fruit enzyme, which comprises the following steps: S1, preparing the compound fruit enzyme as an additive of traditional shrimp feed; s2, the macrobrachium rosenbergii is subjected to experimental breeding by using different compound fruit enzyme addition proportions, a test sample is obtained, and the mass proportion range of the compound fruit enzyme to the traditional shrimp feed is 0.5%-5%; s3, establishing a mathematical model, taking the contents of calcium, iron, EPA and DHA in shrimp meat in the adult macrobrachium rosenbergii, the weight of the macrobrachium rosenbergii and the elasticity of the macrobrachium rosenbergii as evaluation indexes, and determining a mathematical relationship between the optimal ratio of the compound fruit enzyme additive to the traditional shrimp feed and the evaluation indexes in combination with experimental sample data; s4, calculating the adding ratio of the optimal compound fruit enzyme additive to the traditional shrimp feed; and S5, feeding the macrobrachium rosenbergii by using feed with an improved ratio.

The invention discloses an ecological rice planting method for crop rotation of crayfish and macrobrachium rosenbergii, and belongs to the technical field of agricultural production. The invention solves the problem of how to further improve the effect of rice-shrimp co-culture and fully exert the advantages in the prior art. The method comprises the following steps: S1, planting rice in a rice field from April to May every year; s2, after rice tillering and the water temperature is constant to 22 DEG C or above, macrobrachium rosenbergii seeds are put in; s3, starting to catch macrobrachium rosenbergii from August to September every year; s4, harvesting the rice; s5, planting aquatic plants; s6, putting young crayfish in October; and S7, catching the crayfishes in March of the next year, and then repeating the steps S1-S7. According to the method, on the basis of original one-season rice and one-season shrimps, one-season shrimp breeding is added, and the unit output value and benefits of the rice field are increased. By reasonably regulating and controlling the cultivation time of the macrobrachium rosenbergii, the crayfish and the rice, the marketing time of the macrobrachium rosenbergii and the crayfish is advanced by one month, the economic value of the rice field is fully volatilized, and the produced economic value is higher.

This invention belongs to the field of feed additive technology. It discloses a method for preparing an antibacterial feed additive for giant freshwater prawns and its application. The invention provides a feed additive containing a probiotic complex, a mineral-essential oil complex, an immune-enhancing complex, and compound trace elements. This feed additive achieves highly efficient inhibition of pathogens such as parahemolytic bacteria through a four-pronged mechanism of action: probiotics inhibit bacterial growth, plant-derived components synergistically kill bacteria, minerals adsorb toxins, and trace elements enhance immunity and the intestinal barrier. This significantly reduces the incidence and mortality of bacterial diseases in giant freshwater prawns. Furthermore, this invention solves the technical problem of the difficulty in coexisting probiotics and plant essential oils in existing technologies, exhibiting significant synergistic effects, good stability, and green safety, making it suitable for the entire process of giant freshwater prawn farming.

The application discloses a bait feeding device for breeding of Macrobrachium rosenbergii, which comprises a storage bin, a scattering bin, a feeding part and a discharging part. The scattering bin is provided with a plurality of scattering ports with different heights. The discharging part is arranged at the bottom of the storage bin and is suitable for quantitative discharging into the scattering bin. The feeding part is suitable for power conveying of the material into the scattering bin, so that the material is scattered out of the scattering bin at different scattering ports. According to the height of the scattering port, the feeding part makes the bait have a certain initial speed when leaving the scattering bin. In the case that the heights of the scattering ports are different, the bait can be scattered in a larger range each time, and the scattering range of the bait after each scattering is increased.

The present application relates to the field of resource processing of apple snails and aquaculture technology, and particularly relates to a method for cultivating macrobrachium rosenbergii fry based on resource processing of apple snails. The method comprises the following steps: sequentially performing multi-stage purification on the captured apple snails through temporary breeding emptying, circulating micro-flow water flushing and EM bacteria liquid soaking, then crushing the apple snails into minced meat, adding salt and / or organic acid, mixing the minced meat with plant raw materials rich in vitamins and vitamin mineral premixes in proportion, and extruding or molding the mixture into apple snail soft block baits which are not easy to be soaked and dispersed by using a hydrophilic gel adhesive. In the fry cultivation pond, the soft block baits are precisely fed in proportion and at a specified time period together with the feed, and the feeding amount and water change are dynamically adjusted in combination with water quality indexes, so as to improve the gonadal development and reproductive performance of the macrobrachium rosenbergii fry, stabilize the water quality and reduce the cost of baits.

The application discloses a model analysis-based behavior discrimination and breeding method for non-molting period macrobrachium rosenbergii, which comprises the following steps: setting a three-dimensional breeding model and monitoring points according to the breeding space and quantity; acquiring a breeding image set and water environment parameters through a monitoring unit, identifying a target group by using a yolov5 model, evaluating color feature differences, judging the molting period shrimp proportion, and setting a PIT marking scheme; analyzing target behavior characteristics, combining water environment parameters to generate characteristic data; introducing a self-encoder dimension reduction, dividing characteristics and cycle periods by using an SVN model binary classification; analyzing group activity probability according to period characteristic data, and setting path cost; finally, predicting molting period and non-molting period group activity migration by using a three-dimensional A* shortest path algorithm, and formulating a breeding isolation scheme, so that precise breeding management is realized.

The application discloses Macrobrachium rosenbergii 5K liquid phase chip and application thereof, relates to the technical field of molecular detection of aquatic species resources, and comprises a target capture probe combination and a 6087 specific SNP site combination; the SNP sites are all located on a Macrobrachium rosenbergii reference genome HiCasm202009.chrome.fasta, and the probe combination is used for specific identification and enrichment detection of the SNP sites. Through the use of strictly screened high-quality sites, specifically designed specific probes according to target sequences and liquid phase targeted hybridization enrichment technology, efficient and accurate detection without redundant data is realized, the stability and reliability of the typing result are ensured, the detection and analysis cost is reduced, the chip can comprehensively support the multiple applications of Macrobrachium rosenbergii genotyping, species identification, pedigree reconstruction and good seed breeding, and the efficiency and standardization of Macrobrachium rosenbergii species management and precision breeding are improved.

The invention discloses a synchronous rapid detection method for macrobrachium rosenbergii iridovirus and multiple pathogens, and belongs to the technical field of biology. According to the method, macrobrachium rosenbergii tissue gene DNA is extracted by adopting a Chelex method, then PCR amplification is performed, and an amplification product is detected for judgment. According to the method, the genome DNA is extracted by adopting an optimized CHELEX method, enough DNA samples for detection can be extracted only by using a trace amount of tissue samples, meanwhile, the DNA extraction time is greatly shortened, and only 20 minutes are needed from sample treatment to extraction of enough macrobrachium rosenbergii tissue DNA. PCR (Polymerase Chain Reaction) specific amplification and gel electrophoresis are carried out by taking the macrobrachium rosenbergii as a template, so that the aim of quickly detecting common diseases (especially iridovirus) of macrobrachium rosenbergii can be fulfilled.

The utility model relates to the technical field of plastic film sunlight shed of breeding, specifically is a pond temperature control macrobrachium rosenbergii breeding plastic film sunlight shed, including pool body, still including arc groove frame, arc toothed plate, arc spring rod and arc block, the one side of arc block is provided with slide hole, the inner wall of slide hole and the surface of arc spring rod are connected with the sliding, the inner wall of reel is rotatably connected with the pivot, the surface of pivot is fixedly connected with gear, one end of pivot is rotatably connected with the one side of arc block, the utility model discloses through pulling two follow -up limit blocks, make two arc blocks slide in the inner wall of two arc groove frames, can drive the pivot and gear sliding when two arc blocks slide, when the gear is engaged with arc toothed plate, can realize the rotation of gear, the rotation of gear can drive the rotation of pivot, further in the process of lifting plastic film, through the rotation of gear drive pivot and reel, can automatically be rolled up to plastic film in the process of lifting.

The invention discloses a temperature-controllable hatching device for macrobrachium rosenbergii fry breeding, and relates to the technical field of aquaculture equipment, the temperature-controllable hatching device comprises a bottom plate, the top of the bottom plate is provided with a precise temperature-control circulating hatching mechanism, and one side of the precise temperature-control circulating hatching mechanism is provided with a PLC; according to the temperature-controllable hatching device for macrobrachium rosenbergii fry breeding, by arranging the precise temperature-control circulating hatching mechanism, independent temperature control and water changing of each cavity can be achieved, during water changing, a second electromagnetic valve can independently control a water changing pipe and a water discharging pipe of each cavity, in combination with a pre-warming water body of a constant-temperature water tank, it is ensured that water temperature fluctuation of each cavity is stable in the water changing process, and the hatching efficiency is improved. The problems that an existing hatching device mostly adopts an overall water body heating mode, water temperature distribution is uneven, temperature control response is delayed, the low shrimp egg hatching rate and the poor juvenile shrimp survival rate are easily caused, a traditional device lacks a water body circulation structure, water temperature fluctuation is large during water changing, hatching stability is further affected, and the hatching efficiency is affected are solved. The precise temperature control requirement of large-scale seedling culture is difficult to meet.

The utility model provides a kind of roes pond water plant planting tool, including planting insertion tube, the planting insertion tube top is fixed with support top seat, the support top seat one side is fixed with installation connecting seat, the installation connecting seat is equipped with screw groove.This scheme array groove on horizontal frame plate is loaded with multiple water grass mud column by one time, and realizes multiple-point continuous planting under single positioning by the continuous pressing operation of pressure rod and push rod head, reduces the time consumption of repeated adjustment tool position, significantly improves planting efficiency, the pressure rod is linked in this scheme through lifting cylinder and extension spring, cooperate with the vertical pressing action of push rod head, replace artificial rigid pressing, operation is more labor-saving and rhythm controllable, reduce labor intensity, by rotating tool, stable base is rotated into pond bottom mud, can accurately control the depth of rotation, ensure that water plant root system and bottom mud are in full contact, avoid the problem of low survival rate caused by traditional artificial planting depth not being same.

The utility model discloses a macrobrachium rosenbergii offspring seed pull net, and belongs to the technical field of aquaculture, the macrobrachium rosenbergii offspring seed pull net comprises a fixing frame, a fishing net is movably connected to the interior of the fixing frame, floating columns are fixedly connected to the upper portions of the front side and the rear side of the fixing frame, and a pull rope is fixedly connected to the left side of the fixing frame; the end, away from the fixing frame, of the pull rope is fixedly connected with a winding device. By arranging the fishing net, screening of macrobrachium rosenbergii offspring seeds of different sizes is facilitated, the fishing net is inserted into the inserting groove to be fixed during use, the fixing frame can be thrown into a culture pond after fixing is completed, then the pull rope is pulled, and the winding rope is wound on the rotary drum to be wound, so that the macrobrachium rosenbergii offspring seeds can be screened conveniently. The fixing frame moves along with pulling of the pull rope, the catching nets can catch prawn seeds, meshes of net bodies in the multiple catching nets are sequentially decreased from left to right, the prawn seeds of different sizes can be screened, manual sorting is not needed, and the labor intensity is reduced.

The invention discloses a method for screening high-activity zoeae of macrobrachium rosenbergii, and belongs to the technical field of aquaculture. The method comprises the following steps: carrying out immersion cleaning pretreatment, namely fishing I-stage zoea by using a 100-mesh nylon fishing net, and carrying out stirring treatment in a first immersion cleaning container containing 100ppm formaldehyde and 0.6% brackish water; a light source is used for inducing and screening for the first time, an LED light source of 580-595 nm and 1500-2000 lux is used for inducing right above the second immersion cleaning container, and floating high-activity I-stage larvae are collected in several times; disinfection treatment is conducted, specifically, 20-30 ppm povidone iodine is used for soaking, and then washing is conducted; light source induction screening is carried out again, after the larvae are cultivated for 24 hours at the constant temperature of 28-30 DEG C and grow into the II stage, light source induction is carried out again, and floating high-activity II stage larvae are collected in batches; and finally carrying out centralized cultivation. According to the method, specific wavelength light source induction is combined with two times of screening before and after the key development period, immersion cleaning, disinfection and cultivation parameters are optimized, efficient and standardized sorting of the high-activity zoea is achieved, and the seedling quality and the seedling survival rate are remarkably improved.

The application relates to a method for hatching artemia and a method for breeding macrobrachium rosenbergii. The method for hatching artemia comprises the following steps: soaking and disinfecting artemia eggs in a first disinfectant, cleaning the artemia eggs with water, and then hatching the artemia eggs in salt water to obtain artemia nauplii; soaking and disinfecting the artemia nauplii in a second disinfectant, cleaning the artemia nauplii with water, and then hatching the artemia nauplii in seawater containing a composite beneficial microorganism preparation to obtain artemia nauplii carrying the composite beneficial microorganism; and the composite beneficial microorganism preparation comprises lactic acid bacteria and butyric acid bacteria. The method for breeding macrobrachium rosenbergii comprises the following steps: arranging macrobrachium rosenbergii larvae in a breeding water body, feeding the artemia nauplii carrying the composite beneficial microorganism on the second day of the arrangement, and increasing the feeding amount day by day until the macrobrachium rosenbergii larvae develop to the eighth stage, and then mainly feeding egg custard and supplementarily feeding the artemia nauplii carrying the composite beneficial microorganism. The application solves the problem of low metamorphosis development rate of the larvae in the prior art method for breeding macrobrachium rosenbergii.

The invention discloses a comprehensive planting and breeding method for rice, ducks and shrimps, and belongs to the field of agricultural production.The comprehensive planting and breeding method for rice, ducks and shrimps specifically comprises the steps that freshwater shrimps and macrobrachium rosenbergii are bred in a rice field in the first half year, and rice is planted and sheldrakes are bred in the second half year. According to the comprehensive planting and breeding method, the omnivorous characteristics of the freshwater shrimps and the macrobrachium rosenbergii are fully utilized, and the number of algae and other aquatic organisms in the rice field is reduced. Excrement of the shrimps can increase soil fertility and reduce the use amount of chemical fertilizer in the rice field; the ducks can prey on duckweed, aquatic plants and rice diseases and pests, eggs laid by the ducks can also increase income for farmers, and'five purposes in one water and five harvests in one field 'are achieved.

The present application relates to the field of macrobrachium rosenbergii feed, and particularly relates to a macrobrachium rosenbergii feed resisting decapod iridovirus disease and a production process thereof, the feed is composed of base feed and 1.0%-2.0% three-year-old gahnia filiformis super-fine powder, the production process includes steps of three-year-old gahnia filiformis airing and crushing, base raw material pretreatment and mixing, low-temperature granulation, 65 DEG C drying and cooling, vacuum packaging and storage, and the whole process guarantees the activity of gahnia filiformis effective components; under the premise of not affecting the growth performance of macrobrachium rosenbergii, the present application significantly improves the resistance of macrobrachium rosenbergii to decapod iridovirus disease, improves intestinal tissue structure, maintains intestinal flora stability, and improves serum non-specific immune enzyme activity; meanwhile, the present application solves the problems of poor stability, insufficient targeting, and low activity retention rate in processing of the existing immune enhancer, realizes the synergistic effect of feed nutrition and antiviral immunity, and provides an effective scheme for macrobrachium rosenbergii healthy breeding.