57results about How to "Avoid cannibalism" patented technology

The invention discloses a method for ecologically poly-culturing fishes with different feeding habits in net cages of a shrimp culture pond. A plurality of net cages are arranged in the shrimp culture pond; one or more omnivorous fishes, filter-feeding fishes and carnivorous fishes are put into the net cages; shrimps are put outside the net cages; the putting density of the shrimps is reduced; and the fishes and the shrimps are cultured in a separated manner by the net cages. The method can be used for culturing the fishes and shrimps in a separated manner, so that the shrimps are prevented from being preyed by the fishes, the fish baits are sufficiently utilized, and the catching is easy.

An octopus culture cage consists of a reinforced frame, a maintenance net, plastic disks, a polyvinyl chloride tube, an isolation mesh, an inflatable floating box, a balance weight and the like which are interconnected. The reinforced frame takes a cylindrical shape and is covered by the maintenance net on the outer layer; two plastic disks are laterally fixed on the reinforced frame, and the two plastic disks are formed into a skeleton structure of the culture cage in common; a plurality of circular holes are drilled on the plastic disks; the polyvinyl chloride tube longitudinally passes through a front plastic disk and a back plastic disk through the circular holes; a plurality of polyvinyl chloride tubes can be longitudinally arranged in the culture cage, have a plurality of combinations of diameters, and are not densely arranged; the upper end of the culture cage is provided with the inflatable floating box, and the bottom of the culture cage is provided with the balance weight. The octopus culture cage can provide a habitat for the octopus and effectively prevent the octopus from killing and devouring each other, thus realizing high-density artificial culture of the octopus, effectively avoiding wind and wave attacks and improving the wind and wave resistances. The octopus culture cage is an ideal octopus culture device.

A cellular-type hybrid breeding method for prawn and filter feeding fish, includes cleaning the pool before discharging water, sunburning the bottom of the pool, killing and extinguishing pathogenic organism, and adding water, applying to fertilizer to culture plankton, freeing and culturing filter feeding fish and prawn, moreover, bait throwing in fixed time, adding oxygen, and praying them when they are up to goods specification; characterized in that it breeds separately prawn and filter feeding fish positioned in the closed net cages or semiclosed nets. The inoculation denseness of said prawn is 15000 to 40000 tails per acre, and that of filter feeding fish is 10 to 120 kilogram per acre, whereof the size of the fish is 25 to 200 gram per tail. The invention breeds prawn and filter feeding fish separately applied to the closed net cages or semiclosed nets, which avoids filter feeding fish to murder and seize bait with prawn, and applies to the best denseness for fish and prawn hybrid breeding.

The invention discloses a culturing device with a function of fish screening. The device comprises a water tank, the inner bottom of the water tank is provided with a plurality of partition plates arranged at intervals, clamping grooves are formed in the upper portions of the two sides of each partition plate, and each clamping groove is internally provided with a screen in a clamping mode. The water tank is divided into a plurality of independent culturing tanks by the partition plates and the screens. A water draining hole is formed in the middle of the bottom end of each culturing tank, the sieve numbers of the two adjacent screens are different, and the sieve numbers of all the screens are decreased progressively in sequence from large to small. The water tank is further connected with a water inlet pipe assembly and a water draining pipe assembly. According to the culturing device, the water tank is divided into a plurality of the independent culturing tanks by the partition plates and the screens, sufficient activity space can be provided for small individual fingerlings, and the phenomena of attack and cannibalism among the individuals of the fingerlings can be effectively avoided.

The invention discloses a method for temporary culture, egg laying and egg protecting of octopus variabilis sasaki and a device for the method, wherein the method comprises steps of 1 selection of parents, 2 temporary culture and accelerated ripening of parents and 3 egg protecting of the parents, and an octopus nest which is specifically designed is used. The method for temporary culture, egg laying and egg protecting of the octopus variabilis sasaki is simple in operation, the device for the method is low in cost and high in use rate, can effectively increase survival rate and egg laying amount of the parents of the octopus variabilis sasaki, hatching rate of fertilized eggs and healthy degree of young seedling. The octopus nest simulates a natural nest structure of the octopus variabilis sasaki, is more suitable for actions of patient octopus variabilis sasaki such as hiding, defensing and laying eggs and protecting eggs and the like, and is simple in making, convenient to use, less in investment and excellent in effects.

The invention discloses a device and method for portunus trituberculatus trotline type single body floating basket cultivation. The cultivation device comprises cultivation baskets and foam floating frames, wherein the cultivation baskets are sleeved with the outer portions of the foam floating frames. Every cultivation basket is internally divided into two small grids through a separating net, sand boxes are subject to pressure casting in every small grid, and the cultivation baskets are in series connection through two parallel trotlines. According to the cultivation method, the cultivation baskets are in series connection through the trotlines, and a traction device arranged in a pond drives the trotlines to drive the series connection cultivation baskets to be dragged; a half of a water body of the pond is utilized to perform cultivation, and back-and-forth dragging of the cultivation baskets is facilitated; and the back-and-forth dragging of the cultivation baskets facilitates everyday management work performed by cultivation workers, is also favorable for supplementation of dissolved oxygen in the cultivation water body and facilitates popularization by cultivation users.

The invention relates to feed, particular to feed for swimming crabs. The feed is prepared from raw materials as follows: shrimp meal, fish meal, bone meal, silkworm chrysalis meal, marine animal protein hydrolysate, cuttlefish paste, shrimp shell meal, seaweed meal, soybean meal, peanut meal, corn flour, wheat flour, sugar, squid viscera meal, fish oil, soybean oil, soybean phospholipid meal, choline chloride, decavitamin, compound minerals, monocalcium phosphate, an ecdysone premix, immunopolysaccharide, an antibacterial peptide, bacillus, lactobacillus, non-starch polysaccharide enzyme, strepogenin, a phagostimulant, an antioxidant and a mildew preventive. The feed has balanced nutrition, is antibacterial and meets feeding habits of the swimming crabs, mutual killing of the swimming crabs due to insufficient feed, molting period or overlarge group is avoided, the swimming crabs cannot cross over ponds to escape, the crab incidence rate is low, the survival rate is high, the growth speed is high, and the individual weight of the swimming crabs is higher than that of wild swimming crabs.

A sleeved drum type culturing apparatus for the copepodid crustacean is composed of a culturing drum with internal and external drums, water inlet and outlet and internal net filter, an air-water mixer, a cooler, a water pump, an ultraviolet disinfector and a heater with external sensor.

The invention relates to the technical field of aquaculture, in particular to a large-scale artificial shed room culture technology for shuttle crabs. The large-scale artificial shed room culture technology comprises the steps of breeding pond building, breeding basket preparation, breeding basket placement, crab larva stocking, breeding management and directional mating. A horizontal storage rack is arranged in a breeding pool, each long-edge basket of each breeding basket is provided with an inserting groove, a separation sheet is inserted and connected into each inserting groove, a hiding chamber containing mud sand is arranged in each of the breeding baskets arranged at the left side and the right side of each separation sheet, male and female crab larvas are singly and respectively bred in the breeding baskets arranged at the left side and the right side of the separation sheet, after growth shucking and before reproduction shucking, the separation sheets are pulled away, one female portunus trituberculatus and one male portunus trituberculatus in the corresponding breeding baskets realize natural mating, and each male portunus trituberculatus is immediately moved out of the corresponding breeding baskets after the mating is completed. The large-scale artificial shed room culture technology belongs to a portunus trituberculatus indoor industrial breeding method with the advantages that the mutual killing can be avoided, the water quality can be easily controlled, the harm of wind disasters and wave disasters is avoided, the survival rate is high, and the culture benefits are good.

The invention relates to a Chinese herbal medicine nutritional feed for cultivating giant salamanders. The Chinese herbal medicine nutritional feed is prepared from the following components in parts by weight: 9-17 parts of astragalus membranaceus, 3-6 parts of bighead atractylodes rhizome, 3-5 parts of divaricate saposhnikovia root, 5-9 parts of semen cuscutae, 4-6 parts of epimedium herb, 4-8 parts of prepared rehmannia root, 0.3-0.6 part of calcium hydrogen phosphate, 2-4 parts of algae powder, 1-2 parts of unsaturated fatty acid, 1-2 parts of bacillus subtilis, 0.3-0.6 part of L-lysine hydrochloride, 0.05-0.1 part of zinc citrate, 0.05-0.1 part of organic iron, 0.1 part of vitamin and 0.2 part of microelement. The vitamin comprises VA, VB1, VB2, VB6, VB12, VC, VD and VE. The microelement is microelement amino acid chelate or is one, two or three of zinc, iron and calcium. The Chinese herbal medicine nutritional feed for cultivating the giant salamanders can meet the nutritional requirements of the giant salamanders, the immunity and the sexual gland maturity in mating seasons of the giant salamanders can be improved, and the sperm viability of male giant salamanders is enhanced.

A fresh-water benign ecologic lobster breeding method comprises the following steps of address selection of a breeding pond, reconstruction of the breeding pond, cultivation of aquatic plants, puttingof fresh-water herbivorous trash fish, larva putting and feed putting. The fresh-water benign ecological lobster breeding method has the advantages that smaller-sized lobsters can hide in through holes and are prevented from being cannibalized by larger-sized lobsters by the arrangement of a larva protecting layer at the bottom of the pond, and the survival rate of the lobsters is improved; plants and trash fish are bred in a water body, the pond can be attractive, travel, shrimp fishing and other agritainment activities can be facilitated, the water quality can be kept through trash fish breeding, sufficient live bait is provided for the lobsters, and the quality of the lobsters is improved; an ecologic breeding environment cooperates with a breeding management method, the survival rateof the lobsters is improved remarkably, the lobsters are larger and have better meat, and the incomings of farmers are increased.

The invention provides a raising method of Spodoptera frugiperda larvae, and belongs to the technical field of insect raising. The raising method comprises the following steps that raising the Spodoptera frugiperda larvae in a raising device under the conditions of 28-30 DEG C, light time of 16 h / d, light intensity of 15%-25%, and humidity of 70%-80% until the larvae being old and mature to obtainold and mature larvae. The raising device is a raising device with a cover, and a wrinkle roll paper is covered between the cover of the raising device and a cover opening of the raising device. Using the method of the present invention to feed Spodoptera frugiperda, the five indicators of Spodoptera frugiperda survival rate, pupation rate, feathering rate, average pupal weight and egg productionare close to the raising results of single-head raising, thereby being an effective solution to solve the technical problems of self-killing during raising of Spodoptera frugiperda larvae. The raising method of the invention is easy to operate, and the insect raising efficiency is much better than a single-head raising efficiency, thereby making raising of Spodoptera frugiperda in groups a reality.

The invention discloses an efficient ecological fish-shrimp-crab polyculture method. The polyculture method includes the steps of (1) selection and cleaning of a pond; (2) construction of anti-escape facilities; (3) preparation before stocking; (4) fry stocking; (5) feed feeding; (6) prevention and control of diseases and insect pests; (7) water quality regulation; (8) fish-shrimp-crab harvest. The efficient ecological fish-shrimp-crab polyculture method has the advantages of environmental protection, high reliability, good quality and high economic benefits, and has a wide market prospect in the application and popularization of aquaculture.

The invention discloses an epinephelus culture method. An outdoor ecological pond and an indoor fry breeding pond are connected through a pipeline, alga water in the outdoor ecological pond is pumpedinto the indoor fry breeding pond, a water discharge tube is arranged at the bottom of the indoor fry breeding pond and communicates with the outdoor ecological pond, tail water in the indoor fry breeding pond is discharged into the outdoor ecological pond, then a relay circulation epinephelus fry culture system with indoor fry culture and outdoor alga culture is formed, respective defects of ecological fry culture of an epinephelus pond and fry culture of factory-like circulation water are solved, advantages of the two fry breeding methods are taken into play sufficiently, SS type rotifera ofa sufficient density are provided as a starter feed for larva fishes starting to take feed at a starter stage, it ensures that most larva fishes can start to take feed smoothly at a first moment at the starter stage, live baits of a high density are continuously maintained at a larva fish development stage, all larva fishes can develop relatively synchronously at an early stage of fry breeding, individual differences of a same batch of fries can be reduced as much as possible, cannibalism can be avoided, the fry number can be greatly increased, and the fry rate can be increased.

The invention relates to a mixed feed for parent salamander breeding. The mixed feed includes the following components in parts by weight: 65 parts of fish meat, 5 parts of A starch, 9 to 17 parts of astragalus membranaceus, 3 to 6 parts of bighead atractylodes rhizome, 3 to 5 parts of radices sileris, 5 to 9 parts of semen cuscutae, 4 to 6 parts of herba epimedii, 4 to 8 parts of prepared rehmannia roots, 0.3 to 0.6 part of calcium hydrophosphate, 2 to 4 parts of algae powder, 1 to 2 parts of unsaturated fatty acid, 1 to 2 parts of bacillus subtilis, 0.3 to 0.6 part of L-lysine monohydrochloride, 0.05 to 0.1 part of zinc citrate, 0.05 to 0.1 part of organic iron, 0.1 part of vitamins, and 0.2 part of trace elements; the fish meat is the meat of one or more kinds of the following fishes: black carps, grass carps, chubs, bighead carps, crucians and wild fishes; the vitamins include VA, VB1, VB2, VB6, VB12, VC, VD and VE; the trace elements include 1 to 3 kinds of the following elements: zinc, iron and calcium. The mixed feed for parent salamander breeding can meet the nutritional requirements of parent salamanders, improve the immunity of the parent salamanders as well as the gonad maturity of the parent salamanders in breeding seasons, and strengthen the sperm motility of male salamanders.

The invention belongs to the technical field of aquaculture, and particularly relates to a lobster and crab mixed breeding continuous cropping aquaculture method which includes the steps: (1) pond selecting and cleaning; (2) escape-proof facility arrangement; (3) water grass planting; (4) young lobster and crab stocking; (5) feed adding; (6) water quality adjustment; (7) lobster and crab harvesting. According to the method, a temporary culture pond and an intensive culture pond are arranged and used for breeding young crabs and young lobsters, the crabs are transferred into the intensive culture pond to be bred after the lobsters mature then are fished, scientific feed and environmental management are combined, all fed baits and any use operations are rejected during shelling of the lobsters and the crabs, injury to the lobsters and the crabs during dormant period is avoided, aquaculture time and space can be furthest utilized, the survive rate of the crabs is increased, and economic benefits can be effectively improved.

The invention discloses a differential velocity control method for a wheel side motor. The method comprises the following steps: two torque transducers are mounted on transmission shafts of left and right wheel side motors, and signals are transmitted to a differential velocity controller in time; the wheel side motors are controlled by motor controllers, the motor controllers establish CAN communication with the differential velocity controller, the motor controllers receive torque commands of the left and right wheel side motors issued by the differential velocity controller, and the motor controllers uploads rotating speed of the left and right wheel side motors to the differential velocity controller; and the differential velocity controller establishes the CAN communication with a vehicle controller, the differential velocity controller receives total torque commands sent by the vehicle controller, and torque is recalculated and sent to the left and right motor controllers to control motor rotating torque. Through cooperation among the torque transducers, the motor controllers, the differential velocity controller and the vehicle controller, torque control of the wheel-side motors is achieved, the phenomenon of tyre wear for a long time is avoided, and the service life of a tyre is prolonged.

The invention discloses an ecological alternate culture method of cherax quadricarinatus and procambarus clarkii. The ecological alternate culture method comprises the steps that disinfection and pond drying are conducted 1-2 months before culturing, and water starts to enter 20-30 days before fry putting; 15-20 days before the fries are put, aquatic plants are transplanted, and pond cleaning medicine is used for killing wild trash fishes; procambarus clarkii larvae are put in when the aquatic plants start to take roots, and 100-300 kg / mu of snails are put in March to April to serve as basic bait; after the middle ten days of April, procambarus clarkii with the specification of 35 g or above is caught to be marketed, and procambarus clarkii with the specification of 25 g or above is caught to be marketed in May; after the water temperature is stabilized at 20 DEG C or above, cherax quadricarinatus seeds are put in; after June, more than 25 g of procambarus clarkii is continuously caught for sale; and more than 45 g of cherax quadricarinatus starts to be caught in August for sale. A culturing and separation mode is adopted, the situation that large and small shrimps kill each other is avoided, the problem of self-reproduction and self-breeding germplasm degeneration can also be avoided, the culturing effect is quite remarkable, and good application prospects are achieved.

The invention provides a high-density crayfish breeding method, and relates to the field of crayfish breeding. The method comprises the following specific steps: S1, storing shrimp larvae; S2, arranging a breeding site; S3, performing stocking preparation; S4, stocking shrimp larvae; S5, feeding feeds; S6, performing water quality management; and S7, fishing and marketing finished products. Healthy wild crayfishes are prepared as crayfish larvae, the crayfish larvae are disinfected by using an iodine solution, a pond is arranged, then the pond is cleaned and disinfected, besides, during water quality management, the aeration intensity is increased, the dissolved oxygen of the pond is kept to be more than 5mg / L, water is changed once every 15-20 days, 1 / 2 of the water is changed every time, quick lime water is splashed once every 20 days, and about 10 kg of quick lime water is used for adjusting the water quality per mu every time. According to the high-density crayfish breeding method, the occurrence of a phenomenon that a large number of crayfishes fall ill and are dead is avoided, and the occurrence of huge economic losses of farmers due to the death of a large number of the crayfishes is prevented.

The invention provides a circulating water culturing system and a method for rearing early fry of hybrid snakehead based on this system. The circulating water culturing system is characterized in that a circulating water closed loop is composed of a fry rearing pool, a fry collecting pool and a water treatment pool, and the water treatment pool is added with an aerator and a temperature controller. By using the circulating water culturing system to control a fry survival environment, dividing a culturing cycle into a live food stage, a live food replacement stage and a feeding training stage according to conversion law for feeding habits of hybrid snakehead fry and feeding with different foods in the three stages, conversion stability is guaranteed for feeding habits of fry, and problems that existing pond rearing of hybrid snakehead fry is high in food residue rate and non-uniform in specification, fry easily suffers from parasitic diseases in early stage and are low in survival rate and production is bound by ambient conditions are effectively solved; the method for rearing early fry of hybrid snakehead based on this system is higher than 85% in average fry survival rate and 10-15 times as high as traditional pond rearing of fry in production efficiency.

The invention provides a method for regulating aquaculture water quality in a shrimp and shellfish polyculture mode, and belongs to the technical field of aquaculture. The method comprises the following steps: establishing a bacteria-algae synergistic system capable of regulating water quality, and providing microencapsulated aquaculture baits capable of slowing down deterioration of water quality, wherein the bacteria-algae synergistic system comprises an algae system attached to a porous carrier and a biofloc system with an added carbon source skeleton, the microencapsulated culture baits include a porous pellet core to which lipids are attached under vacuum, and a biodegradable polymer coating film covering the pellet core, and the thickness of the coating film is 1 nanometer or more and 1 micron or less. According to the method provided by the invention, a zero-water exchange effect is achieved by combining the synergistic effect of baits and the bacteria-algae system, and the hydrophobicity of the baits can be improved, so that the baits are not disintegrated, the carbon source cost of the biofloc system is reduced, the volume concentration of bioflocs and the concentration oftotal suspended solids are improved, and the content of Omega-3 fatty acid in an organism and the component content and activity of immune molecules such as phenol oxidase and hemolysin are improved.

The invention discloses a factory breeding method for cherax quadricarinatus. The method includes the following steps: breeding male and female parent cherax quadricarinatus in a breeding pool, the change sequence of the colors of cherax quadricarinatus fertilized eggs being bean yellow, dark brown, orange and dark orange red; selecting ovigerous females whose fertilized eggs grow to dark orange red to individually place, and performing separation operation; collecting the ovigerous females to put into hatching pool to perform hatching through natural mating; individually putting each selectedovigerous female whose fertilized egg is in a specific development period into a transparent plastic box, and closing the plastic boxes to limit the activities of the ovigerous females; and performing further subdivision on the ovigerous females put in the hatching boxes, and putting the ovigerous females with proper density into each nursing pool according to brood amounts and the maturity conditions of egg development. The method effectively reduces influences of factors such as shrimp seeds collecting and tardy avoiding on survival rates; and through the mode of artificial operation, superfluous labor can be reduced, and labor efficiency can be enhanced.

The invention discloses a breeding method of hepialus altaicus larvae. The breeding method comprises the following steps that the top end of a bottle cap of a first breeding bottle serving as a bottombreeding bottle is coated with glue; the bottom of a second breeding bottle and the bottle cap of the first breeding bottle are pasted together; the bottom of the second breeding bottle and the bottle cap of the first breeding bottle are pierced together to form a hole; a cushion is added into the second breeding bottle; water is added into the first breeding bottle; the second breeding bottle isplaced on the top of the first breeding bottle; the second breeding bottle and a bottle cap of the bottom breeding bottle are screwed and connected; a small amount of wet breeding soil is added intothe bottom of the second breeding bottle; carrots and larvae are added into the wet soil of the second breeding bottle; and wet soil continues to be added into the second breeding bottle. The larvae select their habitat positions autonomously; an air hole is pierced in the bottle cap of the second breeding bottle; after the bottle cap of the second breeding bottle is screwed, the second breeding bottle is placed in a breeding environment. The breeding method is low in breeding cost, capable of achieving large-batch breeding, low in maintenance cost, simple and efficient.

The invention discloses a CD7-CAR-T cell as well as a preparation method and application thereof. The CD7-CAR-T cell comprises an antibody targeting a CD7 antigen or an antigen binding fragment of the antibody, and the antibody or the antigen binding fragment of the antibody contains heavy chain variable regions of antigen complementary determining regions CDR1, CDR2 and CDR3 with amino acid sequences shown in SEQ ID NO.12-14; and a light chain variable region having antigen complementarity determining regions CDR1, CDR2 and CDR3 of the amino acid sequences as shown in SEQ ID NO.15-17. According to the present invention, the antibody and the CD7-CAR based on the antibody fragment have strong affinity with the CD7 antigen molecule, and the blocking molecule can almost completely block the expression of the CD7 molecule on the cell surface without affecting the normal amplification of the T cell, such that the self-killing of the CD7-CAR-T cell can be effectively avoided. In addition, the CD7-CAR-T cell disclosed by the invention has a remarkable and specific killing effect on CD7 positive target cells, and a beneficial CAR-T cell is provided for clinical application of cell therapy.

The invention discloses high-efficiency environment-friendly fish and shrimp polyculture feed and method. The high-efficiency environment-friendly fish and shrimp polyculture feed is prepared from thefollowing formula ingredients in parts by mass: 20-25 parts of organic detritus, 5-10 parts of small insect powder, 3-8 parts of dried-powder of housefly larvae, 15-20 parts of earthworm powder, 2-6parts of an immunopotentiator, 25-40 parts of soybean meal and 15-20 parts of cauliflower vegetable oil. According to the high-efficiency environment-friendly fish and shrimp polyculture feed and method, the feed has comprehensive nutrition, the nutritional value of fishes and shrimps is ensured, the immunity of the fishes and shrimps is improved, the survival rate is improved, miscellaneous grains such as soybean meal are added, the weight of the fishes and shrimps is increased, and the economic benefits are improved; it is guaranteed that the feed is sufficient through a method of feeding inthe morning and evening, the phenomenon of cannibalism is avoided, benthic algae and planktonic algae are planted, a good living environment can be provided, and water quality is cleaned; and the whole good growth environment for the fishes and shrimps can be provided, the fishes and shrimps can grow healthy, the output of the fishes and shrimps can be ensured, and the fishes and shrimps have relatively high nutritional value.

The invention relates to the field of shrimp and crab farming, in particular to a shrimp and crab farming apparatus, comprising at least one farming barrel with a top opening. An outflow pipe communicated with the corresponding farming barrel is arranged at the bottom of the farming barrel; each outflow pipe is fitted with a drainage control valve; at least one pipe tower unit is arranged in eachfarming barrel; each pipe tower unit is composed of a plurality of vertically stacked pipe towers; each pipe tower includes a tower, an inhabiting pipe and a feed pipe, one end of the inhabiting pipeis horizontally communicated with the tower, the other end of the inhabiting pipe is communicated with one end of the feed pipe, and the other end of the feed pipe is extended to the top opening of the corresponding farming barrel; the adjacent towers are stacked in vertical direction. The shrimp and crab farming apparatus has the advantage that the influence of farming area upon shrimp and crab yield is greatly relieved at the premise of ensuring that the shrimps and crabs are good in quality and fat.

The invention relates to the technical field of artificial breeding of insects, in particular to an indoor device for efficiently breeding spodoptera frugiperda population. The indoor device comprises a support frame, wherein a nylon net cover with an opening on one side is connected to the outer side wall of the support frame in a sleeving mode, and the opening end of the nylon net cover is connected with a door curtain for sealing the nylon net cover through a zipper. According to the population feeding device and method, the phenomenon of killing each other is avoided, the difficulty of increasing the population number is restrained, and manpower and financial resources are saved. Matrix soil, a plastic basin, a PVC pipe, a three-way connector, a nylon net and the zipper are mainly utilized to be arranged into feeding equipment which is simple in structure, assembling is convenient and fast, the aim of mass feeding can be achieved without consuming a large amount of manpower and energy, in addition, the setting condition of the device simulates the field life history of spodoptera frugiperda, and therefore, a natural development environment for the indoor spodoptera frugiperda is constructed, and the problem that feeding is difficult is solved.

The invention discloses a compound povidone-iodine solution for a crab shelling period and a preparation method of the compound povidone-iodine solution, and belongs to the technical field of aquaticproduct disinfection. The compound povidone-iodine solution provided by the invention is prepared from the following components in percentage by mass: 10 to 50 percent of a povidone-iodine solution, 1to 20 percent of 20-hydroxyecdysterone, 30 to 45 percent of a solution A and 10 to 35 percent of a surfactant, wherein the solution A is prepared from the following components in percentage by mass:20 to 50 percent of rheum officinale, 10 to 35 percent of cortex phellodendri, 10 to 35 percent of radix scutellariae and 20 to 50 percent of purified water. According to the compound povidone-iodinesolution provided by the invention, the disinfection effect of the povidone-iodine solution is not influenced, and meanwhile, the synchronous shelling rate of crabs can be increased, the immunity of soft-shell crabs in the shelling period of the crabs is improved, autogenous residual food is avoided, the effective iodine content is high, and the stability is better.

The invention discloses a hybrid breeding and domesticating facility of different grades and specifications of fishes, and further discloses a feeding method of the hybrid breeding and domesticating facility of the different grades and specifications of fishes. The hybrid breeding and domesticating facility has the advantages that the fishes can be fed with feeds meeting the requirements of the fishes for nutrients in a hybrid breeding pond respectively, and a good breeding effect is realized; the problem that weak and small fishes cannot fight for food can be effectively solved; the purpose of fishing different specifications of fishes in the hybrid breeding pond can be effectively realized; by establishing a labyrinth type breeding area and setting the size of mesh of a blocking net, theproblem of rebounding after subarea feeding in the hybrid breeding pond can be effectively solved, and it is avoided that large fishes kill and devour small fishes; by adding sunshade net energy-saving lamps, planktons are induced, and famous and precious fishes can be effectively domesticated to accept matched feeds.

The invention provides a method for outdoor overwintering of palaemonetes sinensis and belongs to the technical field of breeding of the palaemonetes sinensis in aquatic products. The method specifically comprises the steps that 1, the selected depth of a pond is 2.5-3.0 m, and the area is 4-5 mu; 2, big and small palaemonetes sinensis larvae are separated through a palaemonetes sinensis separating cage before overwintering; 3, pond processing is performed before palaemonetes sinensis stocking; 4, a water caltrop is transplanted; 5, conventional water quality detection is performed; 6, daily management is performed. The method remarkably prevents outdoor mutual hurting of the palaemonetes sinensis larva, improves the overwintering survival rate and improves the environmental change adaptability of the palaemonetes sinensis larvae.