56 results about "Rainbow trout" patented technology

The invention relates to the technical field of aquaculture equipment, and discloses a rainbow trout fry rearing special constant-temperature hatching device which comprises a heat preservation box, a constant-temperature mechanism, a tray mechanism, a top cover assembly and a control panel. The constant-temperature mechanism comprises an S-shaped heat conduction water pipe, a bidirectional water pump, an upper-end heating module and a lower-end refrigerating module, the heat conduction water pipe preheats or precools buffer water flow, the bidirectional water pump rotates forwards and backwards to control the water flow to flow up and down, and natural convection of water in the box is promoted by combining'heat flow rising and cold flow falling ', so that water temperature fluctuation is greatly reduced, and compared with an existing device, the temperature difference is remarkably reduced; the rainbow trout embryo development stable temperature environment is ensured. The folding push handle is turned over to the upper end, the linkage splash-proof grid automatically blocks the top cover vent hole, and water is prevented from being splashed when the device moves; a temperature and dissolved oxygen amount sensor is arranged on the side wall of the heat preservation box, a bubble generator at the bottom accurately adjusts dissolved oxygen, air holes are opened for ventilation when the splash-proof grids are fixed, and it is ensured that the internal environment is moderate.

The invention provides a methylobacterium strain JC03 for producing single-cell protein and application of the methylobacterium strain JC03 in the field of aquaculture, and belongs to the technical field of microorganisms. The methylobacterium strain JC03 is preserved in the China General Microbiological Culture Collection Center (CGMCC), and the preservation number is CGMCC No.32616. The strain is high in growth efficiency, high in thallus crude protein content, rich in amino acid spectrum, high in essential amino acid content and rich in functional components for improving the immunocompetence of aquatic animals; the single-cell protein produced by the strain can completely or partially replace fish meal protein in feeds of marine fishes such as turbot, pseudosciaena crocea, grouper and rainbow trout; vegetable protein in feed of freshwater fish such as grass carp can be completely replaced; animal and plant proteins in feeds for shrimps and crabs, such as penaeus vannamei, can be completely replaced, and animal and plant proteins in stichopus japonicus feeds can be completely replaced; the immunocompetence of fed aquatic animals can be obviously improved. The invention provides a microbial strain for efficiently converting methanol to produce single-cell protein, and the microbial strain has a wide application prospect in the field of aquaculture.

The invention belongs to the technical field of rainbow trout packaging, and discloses an automatic rainbow trout film coating storage fresh-keeping packaging device which comprises a supporting frame, and a conveying chain belt is arranged on the supporting frame; the cutting mechanism comprises a first support arranged on the supporting frame, a cutting table is arranged on the first support, and a cutting knife is slidably connected to the cutting table; the spraying mechanism comprises a spraying plate arranged on the supporting frame, spraying assemblies are arranged on the two sides of the spraying plate correspondingly, and the spraying assemblies are in transmission connection with a spraying power assembly arranged on the spraying plate; the turnover mechanism comprises a second support arranged on the supporting frame, and a turnover assembly used for turning over the rainbow trout is arranged on the second support. And the packaging equipment is arranged on the supporting frame and is used for packaging the sprayed rainbow trout. The rainbow trout film coating device is simple in structure, convenient to use, capable of automatically achieving the processes of cutting off, film coating and packaging rainbow trout, free of manual intervention, high in sectioning uniformity, free of dead corners in film coating and good in quality, the decay speed of rainbow trout is effectively reduced, and the preservation time is prolonged.

The invention relates to the technical field of aquaculture feed. According to the hermetia illucens protein peptide and the preparation method thereof, the hermetia illucens protein peptide prepared by adopting the technical scheme can be used as a feed protein source to replace most fish meal in feed, so that the use of the fish meal in aquatic feed is reduced, and the problems of shortage and insufficient supply of the fish meal are solved. The invention also provides application of the hermetia illucens protein peptide in preparation of functional feed for improving fish growth performance and fish muscle and meat quality. Fish functional feed prepared from the hermetia illucens protein peptide not only can significantly improve growth of rainbow trout, but also has no negative effect on oxidation resistance of animal livers and dorsal muscles, and can also improve muscle meat quality of rainbow trout.

The invention provides an oncorhynchus mykiss recirculating aquaculture water purification system, and belongs to the technical field of aquatic product aquaculture, the oncorhynchus mykiss recirculating aquaculture water purification system comprises a supporting plate, the supporting plate is connected with a driving assembly and a water pumping assembly, the upper end of the supporting plate is provided with a second motor, and the oncorhynchus mykiss recirculating aquaculture water purification system further comprises an oxygenation assembly used for increasing the oxygen content of purified water; the purifying assembly is used for filtering and purifying the pond water, and the purifying assembly is arranged in the filtering assembly; the cleaning assembly is used for cleaning the bottom wall of the culture pond; the device has the beneficial effects that the surface of the filter plate can be cleaned through the rotating shaft and the cleaning plate so as to guarantee the filtering effect, reagent release can be automatically triggered through the liquid level height so as to complete rapid decomposition of biological flocs and improve the cleaning and purifying efficiency, meanwhile, the rotating shaft synchronously drives the cleaning disc to rotate, and the cleaning effect is improved. Therefore, deposited excrement and sludge are scattered, impurities are prevented from being accumulated at the bottom of the pond, and the cleaning depth is increased.

The utility model discloses a device for fixing fertilized eggs of rainbow trout, which belongs to the technical field of aquaculture and comprises a box body, the top of the box body is fixedly connected with a pair of slide rails, and each slide rail is slidably connected with a support frame. By arranging the sliding rail, the supporting frame, the first bevel gear, the first threaded rod and the transmission assembly, the position of the egg box is adjusted, the supporting frame can slide on the sliding rail and drive the egg box to move horizontally, the transmission assembly drives the first bevel gear to rotate, the first threaded rod can drive the egg box to ascend and descend, it is ensured that the egg box is in a suitable environment, and the hatching rate is increased; through the arrangement of the connecting plate and the bolt assembly, the mode that the egg box is rapidly assembled and disassembled, the sliding blocks are matched with the sliding grooves and the bolt assembly is fixed is achieved, the stability of the egg box after installation is guaranteed, the risk that fertilized eggs are damaged due to shaking is reduced, the egg box can be rapidly disassembled as needed, and the egg box can be conveniently cleaned, overhauled or replaced.

The present application relates to rainbow trout nucleic acid vaccine adjuvant, the adjuvant includes polydisulfide compound and cyclic di-GMP delivered by polydisulfide compound, the present application also relates to the application of the rainbow trout nucleic acid vaccine adjuvant in the preparation of rainbow trout IHNV virus nucleic acid vaccine.A kind of rainbow trout nucleic acid vaccine adjuvant, i.e.c-di-GMP+CPD complex, is developed based on STING agonist-c-di-GMP and polydisulfide compound (CPD) delivery carrier, so as to realize the cost reduction and efficiency increase of rainbow trout nucleic acid vaccine, polydisulfide compound (CPD) can efficiently deliver cyclic di-GMP, and have good stability, c-di-GMP+CPD complex has the potential as rainbow trout immune adjuvant, can significantly enhance the immune protection effect of rainbow trout nucleic acid vaccine, reduces vaccine dosage.

The invention provides a pharmaceutical composition for improving bone mineral density and a preparation method thereof, and belongs to the technical field of biological medicine, the pharmaceutical composition comprises lactarius vomica extract peptide, winged yam rhizome peel extract, rainbow trout extract, calcium citrate-glycine chelate, vitamin K2 and vitamin D3. The lactarius volemus extract peptide is obtained by sequentially carrying out enzymolysis on lactarius volemus by bromelain and subtilisin and purifying and extracting enzymatic hydrolysate through an LH-60 sephadex column. The winged yam rhizome peel extract is obtained by extracting the peels of winged yam rhizome tubers with an ethanol water solution and purifying and extracting the extracting solution with an AB-8 macroporous adsorption resin column. The rainbow trout extract is a product below 5kDa obtained by sequentially performing enzymolysis on fish heads, fish skins and fish scales of rainbow trout through trypsin and lumbrukinase. All the components are compounded according to a specific proportion, and the core effect of improving the bone mineral density is achieved through two-way regulation and control of bone metabolism, optimization of calcium utilization and improvement of safety.

The invention discloses a primer combination for identifying 11 animal-derived components and application thereof, the primer combination comprises 16 specific primers, the nucleotide sequences of the primers are shown as SEQ ID NO.1-16, and the primer combination can be used for identifying 11 animal-derived components of salmon, cod, rainbow trout, oil fish, chicken, duck, goose, cattle, horse, sheep and pig. The invention also provides a corresponding detection method and a detection kit or a detection reagent. The technology realizes high-throughput, high-specificity and high-sensitivity detection of the 11 animal-derived components, not only simplifies the operation process and improves the detection efficiency, but also has wide applicability.

This invention discloses an optimized process for drying rainbow trout skin using vacuum microwave combined with airflow puffing, belonging to the field of food processing technology. Addressing the problems of low crispness and lack of systematic optimization of process parameters in existing rainbow trout skin puffing processes, this invention investigates the effects of pre-drying moisture content, puffing temperature, and vacuum drying time on the puffing rate, hardness, and crispness of the product through single-factor experiments. Based on this, using crispness (deformation distance) as the response value, a quadratic polynomial regression model is established using Box-Behnken design, and the optimal combination of process parameters is determined through response surface methodology. The regression model is: Y = 0.2832 + 0.0837A + 0.0241B + 0.0186C + 0.0025AB + 0.0148AC + 0.0040BC + 0.2480A 2 +0.1190B 2 +0.0286C 2 The optimal process parameters obtained by this invention are: pre-drying moisture content of 30%, puffing temperature of 85℃, and vacuum drying time of 30 min. Under these conditions, the puffed rainbow trout skin product exhibits a deformation distance of 0.25–0.31 mm, a puffing rate exceeding 200%, significantly improved crispness, and stable quality. The regression model established in this invention shows a good fit (R²). 2 =0.9948), with high prediction accuracy, it provides a clear technical parameter window for the industrial production of rainbow trout skin puffed snack food, and has good prospects for industrial application.

This invention relates to a method for trimming the anal fin of rainbow trout fillets, comprising the following steps: S1: The conveyor belt of the trimming device transports the fillets at a predetermined speed. When the fillet reaches image acquisition point A, point cloud data of the fillet is acquired and converted to the coordinate system of the trimming device; S2: The converted point cloud data is preprocessed to obtain the fillet point cloud, and a fillet coordinate system following the fillet's posture is established based on the fillet point cloud; S3: The anal fin region point set is identified based on the geometric features of the point cloud, and the anal fin contour is extracted; S4: The extracted anal fin contour is curve-fitted, and a predetermined distance is offset along the normal vector direction of the fitted curve to generate a cutting path, and the mapping relationship between the cutting path parameters and the cutting time is determined; S5: The cutting path is converted to the coordinate system of the trimming device in real time, and the cutting device is controlled to cut the moving rainbow trout fillet at trimming station B. This method improves the consistency of trimming and the meat yield, and also significantly reduces labor costs and labor intensity.

The invention belongs to the technical field of food detection, and particularly relates to a construction method and application of a salmon germplasm identification and origin traceability discrimination model. According to the application, 54 salmon samples from Norway Atlantic salmon, Chile Atlantic salmon and Chinese Qinghai rainbow trout are taken as research objects, acid hydrolysis extraction-gas chromatography is applied to collect fatty acid data, and chemometrics are combined to take an Atlantic salmon discrimination rate and a salmon origin traceability discrimination rate as indexes; a salmon germplasm identification and origin traceability discrimination model is established, and a theoretical basis is provided for rapidly discriminating the authenticity of the Atlantic salmon and the origin of the salmon by using fatty acid fingerprint spectrum analysis.

The invention discloses a triploid rainbow trout juvenile fish feed and application thereof. The formula of the feed comprises 300.0 g / kg of fish meal, 120.0 g / kg of krill meal, 100.0 g / kg of soybean meal, 80.0 g / kg of soybean protein concentrate, 80.0 g / kg of corn protein, 20.0 g / kg of wheat bran powder, 165.4 g / kg of wheat flour and a mixture of different proportions of fish oil and dephenolized cottonseed oil, the proportion of the dephenolized cottonseed oil replacing the fish oil in the mixture is 25%-100%, and 10.0 g / kg of premix, 0.2 g / kg of astaxanthin, 3.0 g / kg of choline chloride, 1.0 g / kg of EDTA, 0.3 g / kg of betaine and 0.1 g / kg of calcium propionate are added. The feed disclosed by the invention is applied to culture of juvenile triploid rainbow trout, and can be used for remarkably regulating fatty acid composition of a fish body, improving muscle texture and enhancing oxidation resistance and heat stress resistance of the liver on the premise of not influencing growth performance, so that dependence on fish oil is reduced, and green, efficient and sustainable development of aquaculture is promoted.

The invention provides a rainbow trout recirculating aquaculture, spawning and hatching integrated device, and belongs to the technical field of aquaculture, the rainbow trout recirculating aquaculture, spawning and hatching integrated device comprises an aquaculture device body, a vibration turbulent flow assembly and a circulating air supply assembly; through cooperation of the generation chamber, the incubation chamber and the outlet cavity and a hydraulic transfer system, connection from spawning, fertilization to incubation of rainbow trout is achieved, ovum transfer damage is reduced, and the initial incubation rate is increased; a shading structure is designed to shield external strong light and protect embryonic development; the filter screen is matched with the directional nozzle, and the vibration turbulent flow assembly is combined, so that self-cleaning of the filter screen is achieved, pollution sources are directionally discharged, and hatching water is kept clean; according to the circulating air supply assembly, air is continuously supplied to the upper portion of water in the incubation chamber through a rotating wheel, bubbles are pressed downwards through water flow sprayed obliquely downwards, mixed dive flow is formed, oxygenation can be achieved without extra electric power, the water is stirred through the generated bubbles, the temperature and dissolved oxygen in the incubation chamber are distributed more evenly, and the incubation environment is further optimized.

The present application relates to a new application of radix cirsii japonici extract in resisting largemouth bass iridovirus. The present application finds that the radix cirsii japonici extract has a significant effect in resisting largemouth bass iridovirus, can significantly reduce the copy number of largemouth bass iridovirus, inhibit the expression of largemouth bass iridovirus MCP protein, improve the phagocytic ability of largemouth bass kidney leukocytes, and effectively improve the survival rate of fish infected with largemouth bass iridovirus, and has good biological safety. Therefore, the radix cirsii japonici extract can be used for preparing products such as drugs, fish feed or fish feed additives resisting largemouth bass iridovirus, and provides an effective prevention and control means for largemouth bass and other fish breeding.

The present application relates to the field of aquatic organism breeding technology, and particularly relates to a method for preparing rainbow trout tetraploid fry. The method provided by the present application comprises the following steps: obtaining fertilized eggs by dry fertilization of naturally matured rainbow trout parents, inducing the rainbow trout fertilized eggs to obtain tetraploid rainbow trout after 6.2-6.4 hours, and the duration of the induction is 10-18 minutes; after the tetraploid rainbow trout fry is obtained by induction, the chromosome ploidy of the fish is determined by using techniques such as chromosome karyotype analysis and flow cytometry DNA content determination, and the tetraploid rainbow trout fry is identified and screened for cultivation. The present application adopts a drug induction method, and controls the starting time and duration of the induction to inhibit the first mitosis time of the fertilized eggs, thereby improving the induction rate and survival rate of the tetraploid rainbow trout, and the induction rate of the tetraploid rainbow trout can reach 25-30%, and the survival rate of the fry can reach more than 90%.

The invention provides a triploid rainbow trout refrigeration and fresh-keeping method by combining plant extracts with a low-temperature plasma technology, and belongs to the technical field of rainbow trout refrigeration and fresh-keeping. Hawthorn, pericarpium citri reticulatae and fried semen raphani are mixed according to the mass ratio of 2: 1: 2 to prepare a composite plant fresh-keeping agent; according to a sequence of soaking for 20 minutes with plasma activated water, soaking for 10 minutes with a composite plant preservative, and then carrying out dielectric barrier discharge treatment for 2 minutes, a flavonoid compound and organic acid are used for removing strong oxidizing substances generated by plasma treatment, and an anti-oxidation protection layer is formed; the soaking time of the composite plant preservative is dynamically adjusted according to the thiobarbituric acid value, and the technical problem that the preservation effect is reduced due to the fact that low-temperature plasma treatment accelerates lipid oxidation of the triploid rainbow trout is solved.

The present application relates to the technical field of aquaculture feed, and provides a hermetia illucens protein peptide and a preparation method thereof.The hermetia illucens protein peptide prepared by using the technical solution of the present application can be used as a feed protein source, replace most of the fish meal in the feed, reduce the use of fish meal in the aquaculture feed, and alleviate the problem of fish meal shortage and insufficient supply.The present application also provides application of the hermetia illucens protein peptide in preparation of functional feed for improving the growth performance of fish and improving the muscle quality of fish.The functional feed for fish prepared by using the hermetia illucens protein peptide of the present application can not only significantly improve the growth of rainbow trout, but also has no negative effect on the antioxidant capacity of the liver and back muscle of animals, and can also improve the muscle quality of rainbow trout.

The application discloses a method for preparing high-stable PUFA fish oil from rainbow trout viscera by a solubilization pretreatment assisted biological enzymatic hydrolysis technology, which comprises the following steps: placing frozen rainbow trout viscera after low-temperature thawing in 0.1% sodium bicarbonate aqueous solution for incubation, instantaneously cooling the mixture of the viscera and the solution for 5 min, and homogenizing the frozen tissue sample by using a tissue homogenizer; oscillating the homogenized viscera liquid in a warm water bath, adding protease for biological enzymatic hydrolysis, and low-temperature centrifuging the enzymatic hydrolysate; taking fish oil after centrifugation; placing the obtained fish oil in a special glass bottle, sealing the glass bottle after flushing in nitrogen, and storing the glass bottle in dark. The yield of the prepared fish oil is up to 90% or more, the color is bright yellow or light yellow, the fish oil is clear and transparent, has no obvious fishy smell and fish oil rancidity, and contains rich polyunsaturated fatty acids (>40%), which is obviously higher than that of commercially available fish oil; the acid value is low, the free fatty acid content is lower than 0.1%, the oxidation induction time is long, and the fish oil has good oxidation stability.

The invention discloses an oncorhynchus mykiss infectious hematopoietic necrosis disease oral vaccine. The invention provides an infectious hematopoietic necrosis (IHN) oral vaccine. The infectious hematopoietic necrosis (IHN) oral vaccine is mainly composed of an infectious hematopoietic necrosis (IHN) nucleic acid vaccine and a MONTANIDETM GR adjuvant. Compared with oral vaccines composed of other delivery systems and IHN nucleic acid vaccines, the oral vaccine composed of the IHN nucleic acid vaccines and the MONTANIDETM GR adjuvant has a higher protection rate on rainbow trout, and the virus expression quantity and virus titer in all tissues of the rainbow trout are relatively lower 7 days after challenge. The MONTANIDETM GR screened by experiments is a safe oral vaccine delivery system most suitable for oncorhynchus mykiss, and a basis is provided for subsequent research, development and popularization of oral vaccines for fishing.

This invention relates to a method and trimming device for recognizing the anal fin contour of rainbow trout fillets. The method includes: S1: acquiring point cloud data of the fish fillet and transforming the point cloud data from the camera coordinate system to the trimming device coordinate system; S2: preprocessing the transformed point cloud data to obtain the fish fillet point cloud, calculating the principal axis direction of the fish fillet point cloud using principal component analysis, and establishing a fish fillet coordinate system that follows the fish fillet posture; S3: extracting the anal fin contour in the fish fillet coordinate system, which includes: calculating the normal vector and curvature of each point in the fish fillet point cloud; selecting a set of point clouds belonging to the anal fin region from the fish fillet point cloud according to preset curvature thresholds, height thresholds, and width thresholds; selecting seed points in the point cloud set, performing region growing based on the spatial distance and normal vector consistency of the point cloud, obtaining the anal fin region point set, and extracting the anal fin contour from it. This method can effectively overcome the influence of water stain reflection, blood stain interference, and uneven lighting on the fish fillet surface on the recognition results.

The invention relates to the technical field of aquatic organism breeding, in particular to a rainbow trout tetraploid fry preparation method. The method provided by the invention comprises the following steps: carrying out dry fertilization on naturally mature rainbow trout parents to obtain fertilized eggs, inducing the rainbow trout fertilized eggs after 6.2-6.4 hours to obtain tetraploid rainbow trout, and carrying out induction for 10-18 minutes; after rainbow trout tetraploid offspring seeds are obtained through induction, chromosome ploidy of the rainbow trout body is measured through the technologies of chromosome karyotype analysis, flow cytometry DNA content measurement and the like, and the rainbow trout tetraploid offspring seeds are identified and screened out to be bred. According to the method, a drug induction method is adopted, the induction starting time and the induction lasting time are controlled, and the first mitotic time of fertilized eggs is inhibited, so that the induction rate and the survival rate of the tetraploid rainbow trout are improved, the induction rate of the obtained rainbow trout tetraploid can reach 25-30%, and the survival rate of the obtained rainbow trout tetraploid can reach 90% or above.

The application discloses application of Prunella vulgaris extract in prevention and treatment of fish parasitic disease infection. Inclined tube worm in-vitro soaking experiments show that the insecticidal effect of Prunella vulgaris extract and zinc sulfate is equivalent after 48 hours, and the mortality rate is above 95.44%; based on the growth condition of rainbow trout feeding on Prunella vulgaris extract, the specific growth rate of fish is significantly improved, the growth performance is improved, and the growth of fish is promoted; the plasma biochemical indexes after parasitic infection show that the addition of 0.25% to 1% Prunella vulgaris extract in feed can significantly reduce stress caused by pathogenic stress and protect the health of fish liver.

The invention relates to the technical field of biology, in particular to a primer group for rapidly and visually identifying Atlantic salmon and rainbow trout by combining nanogold with loop-mediated isothermal amplification, a detection method and application. The primer group comprises an outer primer pair F3 and B3, an inner primer pair FIP and BIP, a loop primer pair LF and LB and a nanogold probe, the sequences of the outer primer pair F3 and the outer primer pair B3 are as shown in SEQ ID No. 1 and SEQ ID No. 2; the sequences of the inner primer pair FIP and the inner primer pair BIP are as shown in SEQ ID No.3 and SEQ ID No.4; the sequences of the loop primer pair LF and the loop primer pair LB are as shown in SEQ ID No. 5 and SEQ ID No. 6; and the DNA (deoxyribonucleic acid) sequence of the nanogold probe is shown as SEQ ID No.7. The method can simply, quickly and visually solve the problem that the Atlantic salmon and rainbow trout species are difficult to accurately and quickly distinguish in the prior art, and is more economical and practical.

The invention discloses a special constant-temperature hatching device for rainbow trout fry rearing, which relates to the technical field of aquaculture equipment and comprises an external heat insulation box body, a plurality of layers of independent hatching units, a water circulation control system, a main water inlet pipe and a water return pipeline. The hatching unit is of a drawer type structure, the bottom of the hatching unit is provided with a flow equalizing plate and a conical flow guide hole, a bottom-up upwelling type suspension flow field is formed, and roes are evenly suspended and rolled. The water circulation system integrates a circulating pump, a refrigerating and heating module, an ultraviolet sterilizer and a dissolved oxygen oxygenation device, and accurate control over water temperature, control over the content of dissolved oxygen and continuous sterilization are achieved. The upper part of each unit is provided with an overflow port, and water flow is filtered by a water return pipeline and recycled to form a closed-loop system. The device has the advantages of constant temperature stability, uniform dissolved oxygen, convenience in operation, high space utilization rate and the like, can remarkably improve the hatching rate of rainbow trout eggs and fry quality, and is suitable for large-scale breeding production.

This invention discloses a method for deodorizing rainbow trout skin using a blanching-tea polyphenol coupling process. The method includes the following steps: S1. The fish skin is frozen and thawed at 4°C before use. After thawing, the muscle tissue attached to the surface of the fish skin is mechanically scraped off to remove residual meat scraps and impurities, and then the fish skin is washed. S2. The fish skin treated in step S1 is cut into fish skin samples of the same shape according to the same specifications. S3. The fish skin cut in step S2 is blanched in pure water at a medium temperature for a short time. S4. The fish skin blanched in step S3 is soaked in a tea polyphenol solution of a certain concentration at room temperature for 60 minutes and then drained. This invention is green, natural, and deeply deodorizes the fish. The blanching-tea polyphenol coupling process effectively improves the defects of heavy residual fishy smell and high risk of undesirable residues, and has broad application prospects in the field of high-value utilization of fish by-products.

The invention discloses a sturgeon and rainbow trout integrated culture method, and belongs to the technical field of fish culture, and the method comprises the following steps: S1, equipment place preparation; s2, fry selection and stocking; s3, feeding management: selecting corresponding foodstuffs of sturgeons and rainbow trout, putting the foodstuffs into the sturgeon and rainbow trout feeding device, and regularly feeding the sturgeons and rainbow trout through the sturgeon and rainbow trout feeding device; s4, fishing and selling; the sturgeon and rainbow trout feeding device comprises a mounting frame mounted between the sturgeon culture pond and the rainbow trout culture pond. According to the invention, the mounting rack is mounted between the sturgeon culture pond and the rainbow trout culture pond, and the incomplete bevel gear is located at the position engaged with the two groups of bevel gears; according to the automatic feeding device for sturgeons and rainbow trout, when a worker feeds sturgeons and rainbow trout in the sturgeon culture pond and the rainbow trout culture pond, the double-head servo motor is only needed to be started, the conveying roller can correspondingly rotate to complete the feeding task, operation is more convenient and faster, and the workload of the worker is greatly reduced.

The invention relates to a preparation method and application of a rainbow trout fishbone polypeptide compound. The preparation method of the rainbow trout fishbone polypeptide compound comprises the following step: carrying out compound enzymolysis on rainbow trout fishbone by using alkaline protease-trypsin. The rainbow trout fishbone polypeptide is obtained through further ultrafiltration, liquid chromatography-mass spectrometry analysis, computer-aided screening technology and in-vitro verification, and the amino acid sequence of the rainbow trout fishbone polypeptide comprises any one or more of DRG, ARG, FDIIK, FVDI, IALEK and AAVK. The rainbow trout fishbone polypeptide compound and rainbow trout fishbone polypeptide provided by the invention have good uric acid reducing activity, can reduce the content of uric acid, and have the advantages of good water solubility, no toxicity and the like.

The invention relates to the technical field of aquaculture, in particular to an efficient and low-consumption cold water shrimp fry and fingerling breeding method. The method comprises the following steps: laying microcapsules for packaging paraffin phase-change materials at the bottom of a breeding pool, injecting underground water in a pulse manner through an annular water distribution pipeline, monitoring the water temperature in real time by using a wireless temperature sensor, and regulating and controlling the water temperature in combination with intelligent temperature control logic. According to the invention, temperature fluctuation is buffered bidirectionally through heat absorption and heat release of the phase-change material, and an underground water pulse injection technology is combined, so that the problems of high embryo death rate and over-high energy consumption caused by temperature fluctuation and embryo displacement damage caused by water flow disturbance in the prior art are solved, and the embryo death rate and energy consumption are remarkably reduced; the device is suitable for hatching cold water fries such as rainbow trout and cold water shrimps, and has the advantages of high stability, good economical efficiency and strong ecological property.

The invention discloses a cryobacterium SD-C-1-7 and application thereof in rainbow trout culture, and belongs to the technical field of aquaculture water quality purification. The strain is classified and named as Pseudomonas sp., when the strain is in a low-temperature environment of 8-18 DEG C, the removal rate of ammonia nitrogen in a rainbow trout culture water body is larger than or equal to 87%, the removal rate of nitrite nitrogen is larger than or equal to 91%, the removal rate of total phosphorus is larger than or equal to 52%, and the preservation number is CCTCC NO: M20251642. The method has the core advantages that the low-temperature adaptability is high, and the problem of low low-temperature denitrification efficiency of traditional nitrifying bacteria is solved; the purification function is comprehensive, ammonia nitrogen, nitrite nitrogen and nitrate nitrogen can be synchronously removed, and total phosphorus can be synergistically reduced; the purification efficiency is stable, in a 60-day rainbow trout breeding test, ammonia nitrogen is stabilized to be 0.4 mg / L or below, nitrite nitrogen is lower than 0.2 mg / L, and the average removal rate of total nitrogen and the average removal rate of total phosphorus reach 29.86% and 39.45% respectively. Meanwhile, the invention provides a water quality purification fungicide containing the strain and a rainbow trout circulating water culture water quality purification method, the fungicide preparation process is mature, application is convenient, rainbow trout culture benefits are remarkably improved, and the requirements of green sustainable development are met.