302 results about "Crayfish" patented technology

The invention discloses a rice field crayfish body surface cleanliness improving method based on accurate aquatic plant management and protection and ecological induction, and relates to the technical field of crossing of aquaculture and ecological agriculture. The lifting method comprises the steps that submerged plants are planted in the rice field in February every year, and the submerged plants are trimmed regularly in the cultivation process so that the top ends of the submerged plants can be kept under the water surface; shrimp seeds are put into the rice field, and feed is fed regularly; in the subsequent breeding process, during regular feeding of feed, feeding of crushed pomacea canaliculata is carried out; and after the young crayfishes grow up and shell, catching the crayfishes to obtain the crayfishes with high body surface cleanliness. According to the method, the growth state of the aquatic plants is precisely controlled to construct a natural clean field domain, the functional bait is fed to increase nutrition, meanwhile, friction cleaning is carried out through the feeding behavior, precise fishing is carried out based on the molting period, and therefore the body surface cleanliness of the crayfishes bred in the rice field is improved.

The utility model discloses continuous operation crayfish cooking equipment, which relates to the field of cooking equipment and comprises a conveying frame, a steel mesh conveying belt is mounted on the conveying frame, and a steam hood is fixed at the top of the conveying frame. One side, close to the discharging end of the steel mesh conveying belt, of the conveying frame is provided with a striking strip below the steel mesh conveying belt through an elastic connecting piece; according to the continuous-operation crayfish cooking equipment, by arranging structures such as beating strips, springs and discs, in the continuous crayfish cooking process, the bottom face of the steel mesh conveying belt can be beaten, crayfishes clamped on the steel mesh conveying belt can be separated from the steel mesh conveying belt through inertia, and the crayfish cooking efficiency is improved. The crayfish is prevented from being continuously hung on the steel mesh conveying belt and even falling into the inner side of an exhaust structure below the steel mesh conveying belt, equipment damage is avoided, and the probability of repeated steaming and waste of the crayfish is reduced.

The invention discloses a factory-like breeding facility and method for crayfish fry, and belongs to the technical field of crayfish breeding. The facility comprises a breeding bed frame and a spray seedling cultivation pond, a plurality of breeding cylinders which operate independently are placed on the breeding bed frame, meshes are arranged in the breeding cylinders in the horizontal direction, the breeding cylinders are divided into upper and lower independent spaces including an incubation area and an egg collection area by the meshes, a plurality of groups of shrimp nests placed on the meshes are arranged in the incubation area, and a plurality of shrimp nest units are arranged in each group of shrimp nests; a seedling outlet pipe is arranged at the bottom of the breeding cylinder; the method comprises the following steps: selecting and putting egg-carrying parent shrimps, artificially incubating fry, managing and controlling the incubation process, and collecting the fry. Through precise regulation and control of multiple parameters such as water temperature, dissolved oxygen, pH and the like, parent health management and automatic spray fry collection system integration, optimization of a crayfish industrialized breeding technology is achieved, the survival rate of the parent, the synchronous incubation rate and the hatching rate of fertilized eggs are improved, the specification and quality of spray fry are guaranteed, and therefore the yield and quality of crayfish industrialized breeding are improved.

The invention discloses an aquaculture feeding control method and system based on path optimization. The method comprises the steps that a feeding path dot matrix is constructed based on a GPS or a Beidou navigation system, and the navigation track of an unmanned ship is planned. According to the method, a path planning algorithm, a fixed-point quantitative feeding strategy and multi-mode control logic are fused, efficient and automatic operation of the unmanned ship in a water surface aquaculture scene is achieved, a feeding path dot matrix is constructed based on GPS or Beidou navigation, and track deviation is dynamically corrected in combination with water body characteristics; an automatic feeding task is set according to the growth cycle and the partition breeding density; a remote APP scheduling and local system cooperative control mechanism is adopted, and operation continuity and safety are guaranteed; automatic homeward voyage and charging are supported after the task is completed; operation data can be uploaded to a cloud end in real time, and a breeding log and feeding traceability recording system is constructed. The method is suitable for various aquaculture environments of crayfishes, fishes, crabs and the like, has the remarkable advantages of being accurate in operation, intelligent in control, transparent in management and the like, and can be widely popularized.

The invention relates to the technical field of lobster breeding, and particularly discloses an automatic crayfish catching device suitable for a rice field, the automatic crayfish catching device comprises a base, a frame is fixedly mounted at the top of the base, a microcontroller is arranged at the upper end of one side of the frame, and a control module and a timing module are arranged in the microcontroller. A linkage mechanism of a fishing mechanism, a transverse moving mechanism and a storage mechanism is adopted, the fishing, transporting and storing integrated process is constructed, after a fishing box is fully loaded, a first motor drives a gear rack to move to the position above a storage frame, a third motor is matched with a synchronous wheel to achieve automatic overturning discharging, and a fourth motor drives a rotating disc to alternate the storage frame; the crayfishes do not need to be manually contacted in the whole process, ventilation is guaranteed and escape is prevented through the design of the top tray and the protective net, automatic discharging and storage switching are combined, the labor intensity of workers in the muddy environment is effectively reduced, and the human input and the operation cost are reduced.

The utility model provides crayfish processing equipment, and relates to the technical field of food processing equipment. Comprising a water pool, a bottom plate is installed in the water pool, a ventilation opening is formed in the bottom plate, a baffle is slidably connected to the interior of the bottom plate, a plug plate is slidably connected to the interior of the baffle, an inclined plate is connected to the outer surface of the plug plate, a blocking plate is slidably connected to the interior of the water pool, and a scraping plate is slidably connected to the interior of the blocking plate. A transmission mechanism is arranged in the water pool, and a partition plate is connected into the water pool. Through the baffle and the scraping plate, the baffle can move, so that the upper surface of the baffle forms a plane, the scraping plate can move, and when the scraping plate moves, garbage on the bottom plate can be driven to move, so that impurities on the bottom plate are cleaned away, the impurities cannot stay on the bottom plate body, and cleaning of the impurities is completed; the problem that manual cleaning consumes labor is solved.

The application discloses a crayfish breeding system based on Internet of Things and relates to the crayfish breeding field. The application scheme performs correlation analysis on the environmental parameters, the breeding parameters, the ecological parameters and the dissolved oxygen content data in the oxygenation state and the non-oxygenation state of the test points in the breeding area, screens the dissolved oxygen content influencing factors, obtains the first neural network model and the second neural network model, obtains the first relationship between the dissolved oxygen content influencing parameters in the oxygenation state and the dissolved oxygen content and the second relationship between the dissolved oxygen content influencing factors in the non-oxygenation state and the dissolved oxygen content, sets the dissolved oxygen content standard value at the test points, formulates the oxygenation control strategy according to the obtained first relationship and second relationship, generates the control instruction for adjusting the dissolved oxygen content in the breeding area according to the obtained oxygenation control strategy, and the oxygenation instruction execution module adjusts the dissolved oxygen content in the breeding area in response to the control instruction generated by the oxygenation control strategy generation module.

The present invention discloses a feed additive for secondary spawning of red claw crayfish, as well as its preparation method and application. The present invention comprises the following components: 29.5-30.5% bait powder, 24.5-25.5% methyl farnesate, 9.5-10.5% schizochytrium powder, 9.5-10.5% Porphyridium powder, 7-8% 5-hydroxytryptamine creatinine sulfate, 9.5-10.5% linseed oil, and 7-8% alanine hydroxamic acid; the bait powder is a mixture of lugworm powder and squid viscera powder in a weight ratio of 4-6:5. The present invention also provides a preparation method for the above-mentioned feed additive. The feed additive of the present invention is added to conventional shrimp feed to prepare a compound shrimp feed for feeding the first batch of spawning shrimp of red claw crayfish. The present invention can significantly promote the gonadal development of spawning shrimp of red claw crayfish, rapidly mature their ovaries in a short period of time, improve the spawning rate of spawning shrimp obtained therefrom, and thereby increase the supply of shrimp fry.

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.

1. Name of the product in this design: Packaging Box (Snack Crayfish). 2. Purpose of this design: For packaging products. 3. The key design features of this product are the combination of shape and pattern. 4. The image or photograph that best illustrates the design's key points: a 3D model.

The utility model discloses a crayfish larva transportation device, relates to the technical field of crayfish larva transportation, solves the problems that an existing device is low in practicability and low in crayfish larva survival rate, and adopts the following scheme that an oxygenation box is assembled on the top face of a transportation vehicle, and a water tank is fixedly installed on the left side of the oxygenation box. Through the arrangement of the oxygenation box, the oxygenation pipes and the shrimp seed boxes, the four shrimp seed boxes are arranged on the oxygenation box, shrimp seeds of different specifications and sizes can be conveyed in a classified mode, then oxygen is provided for the shrimp seeds through the oxygenation pipes evenly distributed at the bottoms of the shrimp seed boxes, the situation that the shrimp seeds die due to oxygen dead corners in the shrimp seed boxes is prevented, practicability is high, and practicability is high. Meanwhile, through the arrangement of an output pipe, a circulating pipe and a filter box, the circulating pipe sucks water and impurities in the shrimp seed box into the filter box to be filtered, then clean water in the water tank is input into the shrimp seed box through the output pipe, it is guaranteed that the water in the shrimp seed box is clean, and the survival rate of shrimp seeds is increased.

The invention provides a Chinese herbal medicine fermented feed for crayfish and application of the Chinese herbal medicine fermented feed in prevention and control of five-month blast, and belongs to the technical field of aquaculture feeds. A preparation method of the Chinese herbal medicine fermented feed for crayfish comprises the following steps: taking a mixture of artemisia capillaris, potentilla discolor, radix bupleuri, scutellaria baicalensis, golden cypress, astragalus membranaceus, salvia miltiorrhiza, isatis root and liquorice; and inoculating a compound microbial agent consisting of lactobacillus plantarum, bacillus subtilis, bacillus velezensis and saccharomyces cerevisiae for anaerobic fermentation, mixing extract obtained by fermentation with the basal feed, and performing anaerobic fermentation again to obtain the feed. The feed provided by the invention can effectively improve the anti-stress ability and immunity of the crayfish, regulate the hepatopancreas function and remarkably reduce the incidence rate of five-month blast of the crayfish.

The application belongs to the technical field of lobster processing devices, and particularly relates to a crayfish shelling device, which comprises a bottom box, symmetrical side plates fixedly connected to the two sides of the bottom box, and a mounting table fixed in the middle of the two side plates; a fixing assembly for fixing the position of crayfish, wherein the fixing assembly comprises a vertical rod for inserting crayfish; a guide assembly arranged on the two sides of the vertical rod to guide an operator to insert the head shell of crayfish on the vertical rod from top to bottom; a clamping assembly arranged on one side of the mounting table and used for clamping the tail of crayfish; a driving assembly for driving the clamping assembly to rotate so as to separate the tail from the head shell; and an adjusting assembly for controlling the vertical rod to protrude out of or be retracted into a vertical groove. The application can quickly and completely separate the tail from the head shell, avoid waste of shrimp meat, and automatically classify the tail and the head shell, thereby improving the separation efficiency.

The application belongs to the technical field of cleaning devices, in particular to a crayfish cleaning device, which comprises a cleaning barrel, an ultrasonic cleaning device arranged at the bottom of the cleaning barrel, a placing barrel fixedly installed at the top of the cleaning barrel, a bottom plate slidingly installed in the cleaning barrel, a partition plate fixedly installed at the top end of the bottom plate, a fence rotatably installed at the top end of the bottom plate, a water draining plate fixedly installed at the bottom end of the bottom plate, water leakage openings formed in the bottom plate and the water draining plate, a hollow water draining plate, a first mesh plate and a second mesh plate slidingly installed in the water draining plate, water draining openings formed in the first mesh plate and the second mesh plate, the first mesh plate located above the second mesh plate, the water draining openings formed in the first mesh plate and the second mesh plate arranged in a staggered manner, a water pipe fixedly connected to the fence, a spray head arranged at the bottom end of the water pipe, and a drain pipe arranged at the bottom end of the cleaning barrel. The cleaning device can ensure the cleanliness of crayfish by cleaning first and then spraying and flushing.

The utility model provides a crayfish head removing device, which belongs to the technical field of food processing, and comprises an operation table, a fixing frame is fixedly connected above the operation table, a support is fixedly connected below the operation table, an electric telescopic rod is arranged above the fixing frame, and the electric telescopic rod is fixedly connected with the operation table. According to the crayfish head removing device, an anti-skid pad is arranged on the operation table, displacement of crayfish in the head removing process can be well reduced, head removing is more accurate, the water spraying mechanism is arranged on the fixing frame, after the heads of the crayfish are removed, a cutter can be washed, and the crayfish head removing efficiency is improved. The problems that the digestive system, pancreas and other organs of the head of the crayfish are likely to adhere to the cutter, the follow-up crayfish with the head to be removed can be stained, and the cutter can be corroded after years are solved.

The utility model belongs to tableware, and provides a shrimp peeling tool which comprises a shrimp peeling clamp and a clamping clamp, the shrimp peeling clamp comprises a first clamp body and a second clamp body which are hinged to each other, a blade is inserted into the front end of the first clamp body, and a baffle capable of abutting against the blade is connected to the front end of the second clamp body; the clamping forceps comprise a third forceps body and a fourth forceps body which are hinged to each other, and arc-shaped clamping parts are oppositely arranged at the front ends of the third forceps body and the fourth forceps body. According to the crayfish peeling tool, the head of a crayfish is clamped through the arc-shaped clamping part of the clamping pincers, the crayfish is cut open through the blade on the crayfish peeling pincers, the crayfish shell is peeled through cooperation with the baffle, the tail meat of the crayfish is exposed out to facilitate eating, the crayfish does not need to be in direct contact with the hand in the whole crayfish peeling process, the hand is prevented from being dirty, and the risk of stabbing is avoided. The shrimp peeling tool provided by the utility model can reduce the consumption of plastic gloves and napkins, has the advantage of environmental protection, and conforms to the environmental protection concept of replacing plastic with bamboo and replacing wood with bamboo.

The utility model discloses a screening device for crayfish feed production, and relates to the technical field of feed production devices. The crayfish feed screening device comprises a screening box and further comprises a main body part which is installed on the screening box and used for screening crayfish feed. The collecting part is arranged in the screening box and used for collecting the large feed in a centralized mode; the screening part is arranged on the screening box and is matched with the main body part, so that the feed is uniformly distributed on the main body part; wherein after the crayfish feed is poured into the main body part, the screening part is started, so that the crayfish feed is uniformly distributed on the main body part. According to the screening device for crayfish feed production, the collecting part is arranged, so that the problems that in the using process of an existing screening device for crayfish feed production, large feed is inconvenient to collect in a centralized mode and scattered in different areas of the screening device, repeated manual cleaning and transferring are needed, the operation process is increased, and the overall production efficiency is affected are solved.

The invention discloses a crayfish and purple perilla flavored product and a preparation process thereof, and relates to the technical field of food processing. The preparation process comprises the following steps: screening and pretreating a crayfish raw material, preparing a perilla frutescens flavor stock solution, preparing composite spices, preparing a composite seasoning liquid, performing low-temperature vacuum rolling and kneading to be tasty, performing precise temperature control deep-frying and cooking, performing ultralow-temperature quick-freezing and fresh-keeping, and performing packaging and preservation. By adopting the technical scheme, the technical problems that in an existing crayfish processing technology, the meat quality and taste are poor, flavor substances are prone to volatilization and loss, and crayfish shells are difficult to peel are solved, and the beneficial effects that the product is full and elastic in meat quality and easy to peel, the purple perilla flavor is rich and lasting, and the quality is stable can be achieved.

The invention discloses a rice-shrimp co-cropping-based cadmium-polluted rice field safe utilization method, which comprises the following steps that 1, a cadmium-polluted rice field to be treated is selected, the cadmium content in the cadmium-polluted rice field to be treated is 0.40-1.50 mg / kg, and the pH range of the cadmium-polluted rice field is 5.5-6.5; 2, a compound fertilizer containing urea, diammonium phosphate and potassium sulfate is applied to the cadmium-polluted rice field to be treated, and rice seedlings are transplanted according to the line spacing of 20-25 cm and the plant spacing of 10-15 cm after ploughing and uniform mixing; 3, after the seedlings turn green, young Australian freshwater lobsters with the body length of 2-5 cm are put in; 4, harvesting rice and lobsters in the rice mature period. The invention aims to significantly reduce the cadmium content in rice through the rice-shrimp co-cropping system and reduce the effectiveness of soil cadmium.

The utility model discloses a real-time grading device for caged crayfish at the field end, which belongs to the field of crayfish caged catching tools and comprises a crayfish collecting box, a plurality of crayfish screening boxes, a plurality of crayfish collecting bags and a plurality of crayfish catching cages. Each shrimp screening box is internally provided with a plurality of screening strips which are arranged in parallel at intervals; the sieve strips are in an inclined state, a shrimp outlet is formed in the side of the lower end, located on the sieve strips, of the shrimp sieving box, and the bottom of the shrimp outlet is flush with the lower end of each sieve strip; the bag opening of each shrimp collecting bag is detachably connected to one shrimp outlet; the multiple shrimp screening boxes are arranged in a stacked mode, the distance between the screening strips in the shrimp screening box on the uppermost layer is the largest, and the distance between the screening strips is gradually reduced from top to bottom according to the screening specification. The shrimp collecting box is placed at the top of the uppermost shrimp screening box; a plurality of shrimp inlets are formed in the peripheral side of the shrimp collecting box, and one end of each shrimp catching cage is detachably connected with one shrimp inlet. According to the utility model, the problems of inconvenience in operation, high labor intensity and higher death rate of the crayfishes due to manual cage lifting for collecting the crayfishes and centralized screening can be solved.

The utility model discloses a temporary transfer device for crayfish processing, which comprises a transfer box, the bottom end of the transfer box is fixedly connected with a bottom plate, one side of the top of the bottom plate is fixedly connected with a handle, the top end of one side of the transfer box is fixedly connected with a water inlet valve pipe, and the bottom end of the other side of the transfer box is fixedly connected with a drain valve. And an oxygen supply mechanism for providing oxygen is arranged at the top end of the bottom plate. According to the temporary transfer device for crayfish processing, by arranging an oxygen pump, a connecting pipe, a communicating bin, an air conveying pipe and an air inlet, in the transfer process, the oxygen pump is started to suck oxygen, the oxygen is guided into the communicating bin through the connecting pipe, and then the communicating bin conveys the oxygen into the air conveying pipe; finally, oxygen is fed into water in the transfer box through an air inlet in the top of an air conveying pipe, so that sufficient oxygen is guaranteed for the crayfishes in the transfer process, and the problem that the oxygen content cannot be kept in the transfer process is solved.

This item is a lure (worm) used for octopus fishing. It is made of a flexible material and shaped to resemble a crustacean such as a crayfish. It is used attached to a hook rig, for example, as shown in the "Reference Diagram Showing the Names of Each Part." In this example, the hook rig consists of a core rod with a fishing hook, a ball, and a worm attachment rod. This item has a hook rig attachment hole, as shown in the "AA Cross-Sectional View." Therefore, as shown in the "Reference Perspective View from the Rear Side Showing the Usage State," the worm attachment rod is passed through the hook rig attachment hole, and the hook at the tip of the worm attachment rod is hooked onto the core rod, thereby attaching the item to the hook rig. As shown in red in the "Reference Diagram Showing Air Pockets," air is trapped inside the areas corresponding to the claws and tail. Therefore, during use, buoyancy in the sea tends to cause the air pockets to face upwards. Therefore, when it lies on the seabed (with the longitudinal direction of the needle arrangement aligned with the seabed), the surface shown in the front view tends to face upwards, and the surface shown in the rear view tends to face downwards (towards the seabed). In other words, when viewed from above, the item is likely to land in the state shown in the front view. Moreover, the claws are raised, mimicking the intimidation behavior of crustaceans.

The invention discloses a snail-shrimp-grass green three-dimensional planting and breeding and blue-green algae prevention and control method. The planting and breeding system is constructed through layered utilization of water resources. Chubs are stocked on the upper layer, crayfishes are bred on the middle-lower layer, bellamya is put on the bottom layer, and an underwater three-dimensional space is constructed in cooperation with waterweed and high-temperature-resistant vallisneria nana. According to the method, specific fry specifications, bait formulas and feeding management are adopted, the three-dimensional oxygenation technology is combined, the yield per mu of snails is 800-1000 jin, the yield per mu of crayfishes is 200 jin, more than 60 jin of egg-carrying crayfishes are obtained in batches per mu, and compared with a traditional mode, the benefit is increased by 150%. Meanwhile, by means of the synergistic effect of the vallisneria nana, the bellamya and the chub, growth of the blue-green algae is inhibited, the blue-green algae outbreak risk is reduced by 60-70%, and peripheral ponds can be connected in series to purify tail water for cyclic utilization. The mode gives consideration to economic benefits and ecological benefits, reduces the breeding cost, and realizes peak-shifting high-price marketing of the crayfishes.

This utility model discloses an automatic spraying device for crayfish, solving the problems of time-consuming and labor-intensive manual spraying of crayfish baskets and poor spraying effect in existing technologies. This utility model includes several interconnected tracks, a power trolley mounted on and moving along the tracks, a spraying mechanism mounted on the power trolley and connected to a water inlet hose, and a connecting mechanism between adjacent tracks. The assembly mechanism includes a first connecting rod and a clearance hole on the track, and a nut threaded onto the first connecting rod. When assembling two adjacent tracks, the first connecting rod on one track is located within the clearance hole on the other track and secured by the nut. The tracks, power trolley, and spraying mechanism work together to enable the spraying mechanism to reciprocate spraying the crayfish baskets, reducing the labor intensity of workers and improving the spraying effect.

The present invention pertains to an apparatus (1) designed for the cultivation of benthic organisms, including species like lobster and crayfish. The innovative design features a vertical shelf structure that incorporates multiple horizontal arrays of containers, serving as habitats for these organisms. Within this apparatus, a novel drainage system is integrated into the shelves. This functionality facilitates the supply of water and food, as well as the discharge of used water and waste. The invention further relates to a monitoring system including a structure including a first track, a first rail, a monitoring unit wherein the monitoring unit comprises at least one camera, the monitoring unit being in data communication with an analysis unit comprising a computer readable medium for analyzing images from the at least one camera to assess one or more conditions.

The utility model discloses a centralized hatching device for 1 cm autumn crayfish seedlings, which comprises a hatching pond, a plurality of hatching units are arranged in the hatching pond, and the hatching units are arranged at intervals; the distance between the hatching unit and the bottom of the hatching pond is 25-30 cm, and the hatching unit is used for hatching autumn crayfish seedlings; a water inlet valve and a drain valve are arranged on the side wall of the hatching pond, a plurality of disc-shaped oxygenation nanotubes are arranged at the bottom of the hatching pond, and the oxygenation nanotubes are respectively connected with an aerator; according to the utility model, the plurality of hatching units are arranged in the hatching pond, the plurality of relatively independent hatching net cages are arranged in the seedling raising assemblies of the hatching units, and the hole diameter of the meshes on the side surfaces of the peripheries of the hatching net cages is 1cm, so that the in-vitro autumn crayfish seedlings can freely enter and exit from the hatching net cages and enter the seedling raising assemblies; finally, the autumn crayfish seedlings can be caught and transferred in a unified mode in the seedling raising assembly, and therefore the concentrated catching efficiency of the autumn crayfish seedlings can be improved.

The present application relates to crayfish processing technical field, disclose a kind of crayfish cleaning equipment, including cleaning machine and the conveyer belt being arranged below the cleaning machine, the brush washing subassembly is arranged in the cleaning machine, the brush washing subassembly includes several cleaning roller groups, rotation gear is coaxially arranged at the end of the cleaning roller group, arc-shaped rack is arranged in the cleaning machine, and rotation driving part for driving the rotation of the arc-shaped rack, the rotation gear is engaged with the arc-shaped rack. The present application can realize crayfish automatic cleaning and screening process.

The invention discloses feeding equipment for pond culture of crayfish, and relates to the technical field of crayfish culture, the feeding equipment comprises a guide rail, the inner side of the guide rail is slidably connected with a sliding block, the upper side of the sliding block is fixedly connected with a feeding box, the right side of the feeding box is provided with a feeding unit, and the front side of the feeding box is fixedly connected with a handle and a motor; and the feeding unit comprises two first guide plates, the two first guide plates are fixedly connected to the right side of the feeding box, a lifting plate is slidably connected to the outer sides of the first guide plates, and a bag placing unit is arranged on the right side of the lifting plate. According to the feeding equipment for culturing the crayfishes in the pond, the feeding box, the screw rod, the funnel and the feeding pipe are arranged, so that crayfish feed is conveniently fed; and through a first guide plate, a lifting plate, an electric push rod, a bag containing box, a third inclined plate, a bottom plate and a warping plate, the feed bag can be conveniently controlled to ascend to the feeding height, the feed bag can be controlled to incline, feed is rapidly poured into the feeding box, and therefore the workload of workers is reduced.

The invention belongs to the technical field of biology, and particularly relates to cherax quadricarinatus oocyte targeted functional recombinant Cas9 protein and application thereof. Specifically, the protein is NLs-VgSP-Cas9-NLs (Nuclear Leukemia Sequence-Vector Through direct delivery of the recombinant Cas9 protein, the risk of exogenous gene integration is reduced. Through specific targeting of oocytes, off-target effect on somatic cells can be avoided, germ cell editing efficiency is improved, and research of early development or genetic manipulation is facilitated. The cherax quadricarinatus oocytes are large, the recombinant Cas9 protein is efficiently delivered through endocytosis mediated by oocyte surface receptors, and the problem that microinjection of fertilized eggs cannot be implemented is solved.

The invention discloses a high-yield carp and crayfish polyculture system in a cold region pond, relates to the high-yield carp and crayfish polyculture system in the cold region pond, and belongs to the field of biological behavior ecology and the technical field of aquaculture. The invention aims to break through the ecological constraint of the special habitat of the cold region on the crayfish and solve the problem of the economic benefit bottleneck of the main culture pond for the carps in the cold region. The system comprises a carp feeding area, an annular submerged plant zone and a main crayfish breeding area, and the area ratio of the carp feeding area to the annular submerged plant zone to the main crayfish breeding area is (1-1.5): (0.5-1.0): (10.5-9.5). According to the method, the economic benefit bottleneck of the carp main culture pond is solved, the survival trapping of the crayfish is broken through, and the ecological constraint brought by the special habitat of the cold region is tamed.