131 results about "Sea bass" patented technology

The invention relates to a biological preparation for improving quality of weever, the biological preparation comprises an injection and an edible agent, the injection comprises chemically modified chemically synthesized single-stranded small RNA, Rev-erbalpha protein and Per1 protein, and the edible agent comprises Clock core peptide 1, Clock core peptide 2 and taurine. Skeletal muscle development, liver lipid metabolism and generation of cell inflammatory factors of the weever are influenced by adding and injecting the feed, so that the quality of the weever is improved, intramuscular fat deposition is promoted, the taste and flavor of fish meat are improved, the energy reserve of the weever can be improved, and the culture cycle is shortened. The improvement of cell inflammatory factors shows that the disease resistance of the weever is improved, the survival rate in the breeding process is further improved, and the use amount of antibiotics is reduced. The method provides an important theoretical basis for improving fish meat quality in China and promoting high-quality, efficient and healthy development of aquaculture, and has a wide market prospect.

The invention discloses a bacterial inhibitor for sea bass preservation, the bacterial inhibitor is bacteriocin generated by fermentation of lactobacillus plantarum L13 (the preservation number is CGMCC NO.27398), the bacteriocin comprises active polypeptide xylAB, the amino acid sequence of the xylAB is LLSSLATTGAIALGATAAKA, the preservation number of the bacterial inhibitor is CGMCC NO.27398, the preservation number of the bacterial inhibitor is CGMCC NO.27398, and the preservation number of the bacterial inhibitor is CGMCC NO.27398. The fresh-keeping agent prepared by the invention has a good fresh-keeping effect, can prolong the fresh-keeping period, and has huge potential as a natural food preservative in the food industry.

The utility model belongs to the field of sterilization and disinfection of fish fillets, and particularly relates to a sterilization and disinfection device for processing pulp-free perch fillets, which comprises an ultrasonic box, an operation panel is arranged on the surface of the ultrasonic box, control buttons are arranged on the surface of the operation panel, placement openings are formed in the two sides of the ultrasonic box, a pulling plate is movably installed in the middle of each placement opening, a plurality of leaking openings are formed in the surface of each pulling plate, and a water suction pump is arranged on the back face of the ultrasonic box. Through the arrangement of the ultrasonic box, ultrasonic oscillation can be generated, tiny bubbles are formed in water, bacteria and viruses on the surfaces of fillets are sterilized and cleaned through the blasting power of the bubbles, the disinfection effect is improved, through the arrangement of the operation panel and the control buttons, a troubleshooting and error repairing tool is provided, and the practicability is high. Common problems can be solved, the control button can quickly access common functions or operations, and the operation efficiency of a user is improved.

The invention discloses a method for regulating and controlling meat quality of weever by changing feeding environment salinity, and relates to the technical field of fish culture, the method comprises the following steps: step 1, selecting feeding objects and feeding environment: selecting juvenile weever which is robust in physique and uniform in specification as experimental objects, and equally dividing the selected experimental objects into two groups, one group is an experimental group, and the other group is a control group; 2, measuring the water quality of the culture ponds: detecting the salinity and other parameters of the culture ponds by using a water quality testing tool, and ensuring that the initial parameters of the two groups of culture ponds are consistent; 3, selectively adding salt specially used for the culture pond or introducing high-salinity natural seawater in proportion; and 4, calculating the addition amount. According to the method, the salinity of the water body after the weever passes through the fry stage is larger than that of the water body in the fry stage, so that the muscle fiber density of the weever is reduced, the hardness and chewiness of fish meat are reduced, the fish meat is tender, juicy and good in taste, and the effect of regulating and controlling the meat quality of the weever is achieved.

The invention provides a micropterus salmoides feed additive and application thereof in micropterus salmoides culture, and belongs to the field of aquatic nutrition. The additive provided by the invention is composed of DHA and clostridium butyricum according to a mass ratio of 2: 1-30: 1. The invention further provides application of the additive in a largemouth bass feed and provides the largemouth bass feed, the obtained largemouth bass feed can significantly improve the growth performance and protein utilization efficiency of the largemouth bass, improve the meat quality and saturated fatty acid content of the largemouth bass, and improve the feed utilization rate of the largemouth bass. The abundance of the phylum and mycoplasma in the intestinal tract of the largemouth bass is improved, and the health level and economic benefits of the largemouth bass are comprehensively improved.

The present invention discloses a composite preservative for refrigerated sea bass fillets and a comprehensive fresh-keeping and quality preservation method thereof. The raw materials of the composite preservative include 1-5% trehalose, 0.1-0.5% sodium citrate, 0.03-0.09% ginger extract, 0.3-0.9% D-sodium isoascorbate, 0.03-0.09% nisin, and 0.01-0.03% ε-polylysine in terms of mass percentage; the balance is water. The fresh-keeping and quality preservation method consists of the following steps: preparing and pre-cooling the composite preservative; soaking the treated sea bass fillets in the pre-cooled composite preservative; finally, draining the soaked sea bass fillets and bagging them, and then refrigerating them. The raw materials of the composite preservative of the present invention are natural, green and environmentally friendly, have good fresh-keeping and quality preservation effects, can extend the shelf life of refrigerated California sea bass fillets, and have an inhibitory effect on the oxidation of myofibrillar protein.

The invention discloses a detection reagent, a kit and a detection method for pathogens of micropterus salmoides. The micropterus salmoides pathogen detection reagent comprises primers and probes for specifically amplifying an infectious spleen and kidney necrosis virus, a viral nervous necrosis virus, flavobacterium columnar, a perch rhabdovirus, a micropterus salmoides double-RNA virus, edwardsiella tarda, nocardia and a micropterus salmoides iridovirus; specific upstream and downstream primers and probes of the eight pathogens are sequences as shown in SEQ ID NO.1 to SEQ ID NO.24 in sequence. The micropterus salmoides pathogen detection reagent and method can detect eight pathogens at the same time, have the advantages of high sensitivity, high specificity, good repeatability and the like, provide reliable basis for prevention and control of the pathogens, also improve the prevention and control work efficiency, and have good application prospects. The kit is especially suitable for large-scale rapid screening and mixed infection diagnosis of aquaculture pathogens, and has important value and significance for prevention and treatment of micropterus salmoides pathogens.

The invention relates to the technical field of intelligent automatic grading, in particular to an automatic grading fishing method and system for perches based on living body dynamic perception. The method comprises the following steps: acquiring multi-source perch state sensing data, and based on the multi-source perch state sensing data, performing cross-modal fusion analysis of living body behaviors and physiological appearances according to preset body shape reference parameters to obtain a body shape-stress fusion evaluation information set; based on this, analyzing the matching relationship between the perch body type state, the stress state and the grading fishing target pool, and generating a perch differentiation grading guide strategy set; on the basis, dynamic flow direction regulation and control are carried out through a bubble curtain, the stress perch individuals are drained to the redundant pool, after the stress states of the stress perch individuals are relieved through anti-stress treatment in the redundant pool, secondary flow guide distribution is carried out on the stress perch individuals according to body type evaluation, and a perch automatic grading catching log is output. And the automation level and the sorting accuracy of aquaculture grading fishing are improved.

The utility model relates to the technical field of perch fries, and discloses perch fry hatching equipment which comprises a supporting base, a hatching barrel, a rubber soft ring, a hatching groove, a filter screen, a connecting and fixing plate, a first electric push rod, a first push rod and movable universal wheels. A rubber soft ring is fixedly arranged at the upper end of the hatching barrel, a hatching tank is fixedly arranged at the upper end of the hatching barrel, a material collecting tank is fixedly arranged at the upper end of the hatching barrel, a filter screen is fixedly arranged in the material collecting tank, and a connecting fixing plate is fixedly arranged in the middle of the hatching barrel. According to the weever fry incubation equipment, the incubation equipment is improved, so that the feeding and stirring capacity of the incubation equipment is improved, in the actual use process of the incubation equipment, the weever fry incubation equipment can be used for feeding quickly and effectively according to needs, and stirring of weever fry feed is facilitated; and the use experience of the weever fry hatching equipment is improved.

The invention provides a method for in-vivo detection of fish adipocyte hyperplasia, and belongs to the technical field of cell biology.The method specifically comprises the following steps that a thymine deoxynucleoside analogue EdU based on the DNA synthesis process is mixed into feed, and grass carp and weever are fed for 3 days, then any feed is used for feeding for 2 weeks, adipose tissue samples of the grass carp and the perch are collected for fixing, flaking and immunofluorescence staining, then a fluorescence microscope is used for collecting, processing and analyzing images, and the image results can clearly show green adipose cell membranes, blue cell nucleuses and red EdU newborn cell nucleuses. Wherein the newly grown adipose cell nucleuses are purple after being superposed. The method provided by the invention has the characteristics of convenience, rapidness, high precision and high success rate, and provides theoretical basis and data support for in-vivo detection of fish fat cell hyperplasia.

This application provides a bass fry hatching and rearing pond, belonging to the field of bass farming technology. The bass fry hatching and rearing pond includes a rearing pond and an aggregation component. The aggregation component includes an electric cylinder, a first filter plate, an aggregation frame, and a second filter plate. In use, when bass fry need to be retrieved, the electric cylinder pushes the aggregation frame and the first filter plate upwards. The lower part of the aggregation frame and the first filter plate remain in the water inside the rearing pond. Then, the farmer can move the second filter plate, which moves within the aggregation frame, further compressing the bass fry and gathering them together. This allows for easy retrieval of the fry, saving time and effort and improving efficiency. It is highly practical.

The utility model discloses processing equipment of a Chinese herbal medicine feed additive for perches, which relates to the field of feed additive processing equipment and comprises a processing main machine, a feeding box and a driving motor are mounted on the processing main machine, and the driving motor is connected onto the feeding box. It needs to be explained that when feed enters the material receiving bag through the sleeving pipe and the weight of the feed in the material receiving bag is gradually increased, the material receiving bag pulls the sleeving pipe to move downwards till the bearing capacity of the material receiving bag is reached, the sleeving pipe is pulled to move downwards, the edge sealing disc rotates to drive the other sleeving pipe to be in butt joint with the discharging pipe, and the feed is discharged through the discharging pipe. The automatic switching of the material receiving bags can be realized, meanwhile, the automatic butt joint of the sleeving pipe and the discharging pipe can be realized, only the material receiving bag filled with feed needs to be taken down and replaced with a new material receiving bag at the moment, and during switching, a processing main machine does not need to be shut down, so that the processing efficiency is effectively improved, and the labor intensity of workers is reduced. And the production quality of the feed is ensured.

The application relates to the field of refrigeration technology and discloses a cold storage device for processing sea basses, which comprises a mechanism, rotating frames are fixedly connected to the inner upper part and the inner middle part of a refrigeration mechanism, hanger mechanisms are rotationally connected to the lower ends of the rotating frames, water collecting boxes are slidingly connected to the inner middle part and the inner lower part of the refrigeration mechanism, the hanger mechanisms comprise cold air emitting assemblies, six fish hanging assemblies are uniformly distributed at the lower ends of the cold air emitting assemblies, and adjusting assemblies are fixedly connected to the middle parts of the fish hanging assemblies. The fish hanging assemblies uniformly distributed at the lower ends of the cold air emitting assemblies can automatically adjust the angles of the rotating boxes through the weight of the sea basses when the sea basses of different weights are hung at the lower ends of the hooks, thereby realizing that the sea basses with heavy weight and large volume can be far away from the sliding rods, the adjacent sea basses cannot be adhered to each other, the refrigeration efficiency of the sea basses is improved, and the situation that the sea basses are adhered to each other, the sea basses are damaged after being separated after refrigeration and the fish meat is damaged is prevented.

The invention provides a feed additive for improving the hypoxia tolerance function of micropterus salmoides. The feed additive is prepared from the following raw materials in percentage by mass: 20% of arachidonic acid and the balance of maltodextrin. The invention also provides a feed composition of the feed additive. The feed is prepared from the following raw materials in percentage by mass: 450 per mill of fish meal, 50 per mill of fermented hermetia illucens pulp, 69.5 per mill of enzymolysis chicken powder, 60 per mill of chicken liver powder, 60 per mill of enzymolysis soybean meal, 75 per mill of fermented soybean meal, 60 per mill of cottonseed meal, 29 per mill of dextrin, 40.5 per mill of cassava starch, 23 per mill of soybean oil, 23 per mill of linseed oil, 15 per mill of monocalcium phosphate, 5 per mill of choline chloride, 1 per mill of a micropterus salmoides premix, 1 per mill of zeolite powder and 20 per mill of a feed additive. The feed composition is used for improving the hypoxia tolerance of the micropterus salmoides. According to the invention, arachidonic acid is used as a functional active substance to prepare the hypoxia stress resistant functional feed, and the addition of arachidonic acid can significantly activate liver angiogenesis genes, promote the liver angiogenesis level and improve the hypoxia tolerance of largemouth bass.

To provide a method for using Antrodia cinnamomea essential oil for anesthetic treatment of spotted seabass, in which a problem to be solved is the feasibility of using Antrodia cinnamomea essential oil, which is a natural plant extract, as a new anesthetic to anesthetize live fish, and reduction in stress reaction and tissue damage in the process of anesthetizing live fish.SOLUTION: After spotted seabass is anesthetized by adding Antrodia cinnamomea essential oil in water, the morphological structure of the gill tissue of the spotted seabass and the influence on physiological, biochemical, and oxidative stress are studied, and the blood biochemical stress level, antioxidant enzyme activities, and immune indexes of the spotted seabass are measured to provide a theoretical basis for the anesthetic treatment of the sea fish. As compared with the expensive MS-222 and linalool, the price of Antrodia cinnamomea essential oil is 1 / 10 thereof, which can effectively reduce the cost of anesthesia, is particularly suitable for vaccination, blood collection, weighing, and transportation of live fish, etc., and has a higher economic benefit.SELECTED DRAWING: Figure 2

The invention relates to the technical field of packaging equipment, in particular to a weever weighing and packaging machine which comprises a first conveying device, a chain plate, a belt weigher, a sensing device, a second conveying device, a pushing device and a sealing mechanism, the first conveying device is obliquely arranged so that materials can sink to the bottom, in the working process, the belt weigher weighs bagged weever, and if the weight is not qualified, the belt weigher is used for weighing the bagged weever; the pushing device rejects the materials to the second conveying device; if the weight is qualified, the conveying belt is conveyed to the sealing mechanism, and the sealing mechanism drives a cam through a motor to be matched with mechanical linkage of a driving plate, a moving plate, a locking block and a gear set, so that synchronous actions of intermittent locking and hot-press sealing of the conveying belt are accurately realized. The process that weighing and screening are conducted firstly and then sealing is conducted is achieved, unpacking and reworking waste of unqualified products is avoided, sponge extrusion exhaust is used for replacing vacuum packaging, the problem that perch bones puncture packaging bags is effectively solved, and the production efficiency is improved.

The invention relates to the technical field of roe incubation, and particularly discloses an incubator for improving the hatchability of shuttle perch roes, which comprises a cylindrical shell, a water outlet is formed in the middle of the top side of the shell, a plurality of water outlet nozzles are mounted on the edge of the bottom side of an inner cavity of the shell, and a conical shell with an upward tip is fixed in the middle of the bottom side of the inner cavity of the shell. A vertically-arranged circular pipe body is installed above the conical shell, a plurality of partition plates are fixed to the inner wall of the pipe body, the tip end of the conical shell stretches into the pipe body, and the gap between the conical shell and the pipe body is 1.0-10.0 cm. Shuttleperch eggs in the incubator move up and down in water and do not make contact with a filter screen, and therefore the hatchers can be hatched conveniently. Mechanical extrusion of the shuttleperch eggs is avoided, and the hatching rate of the shuttleperch eggs is increased.

The invention provides a sea bass breeding method which comprises the following steps: parent fish selection and intensive cultivation: selecting 3-5-year-old healthy parent fish, domesticating in a circulating water system with illumination, water temperature and salinity, and feeding intensive feed to promote gonad development; step-by-step spawning induction: injecting the female fish twice, and injecting the male fish once to improve spawning induction synchronism; the semen and the eggs are mixed and activated through ultraviolet irradiation, and the fertilization efficiency is improved; pulse-type water flow hatching: inhibiting water mildew by combining with sound wave oscillation, wherein the hatching rate reaches 85% or above; staged fry breeding: phage-probiotic enhanced rotifers are fed in the fry stage, and microcapsule feed coated with sodium alginate-chitosan is used in the juvenile stage, so that the survival rate and the growth speed of the fry are remarkably increased. The method solves the problems of low fertilization rate, weak seedling disease resistance and the like in traditional breeding through methods of environment simulation, nutrient enrichment, biological prevention and control and the like, and is suitable for large-scale seedling breeding and deep-sea breeding.

The utility model relates to the technical field of weever fry breeding, and discloses a feed feeding device for weever fry breeding, which comprises a base, a first supporting leg is fixedly connected to the bottom of the base, a second supporting leg is fixedly connected to the top of the base, and a fixing ring is fixedly connected to the top end of the second supporting leg. And a tank body is fixedly connected into the fixing ring, and a treatment mechanism is arranged at the top of the tank body. Feed is poured into the tank body through the feeding cylinder, the feed can fall on a disc, after utilization, a first motor is started, a first belt wheel is made to rotate, the first belt wheel makes a second belt wheel rotate through cooperation of a belt, the second belt wheel can drive a stirring rod to rotate, and therefore a connecting plate is made to rotate; and the rotation of the connecting plate enables the two rollers to rotate, and the rotation of the two rollers extrudes the feed on the disc, so that the large-particle feed is ground into small-particle feed, and the weever can be conveniently fed.

The utility model discloses a perch out-of-season breeding temperature control device which comprises an impounding reservoir and a fishpond arranged on one side of the impounding reservoir, a controller is installed on the outer surface of the impounding reservoir, and an automatic water storage structure used for pumping underground water into the impounding reservoir to keep the water level of the impounding reservoir is arranged on the impounding reservoir. By means of the automatic water storage structure and the water treatment assembly, low-temperature underground water can be automatically pumped into the water storage pool, oxygenation and aeration can be conducted on the pumped underground water, escape of nitrogen and carbon dioxide in water is accelerated, and the weever can be effectively prevented from suffering from the bubble disease; the water temperature in the fishpond can be monitored, once the temperature is too high, low-temperature underground water is automatically injected into the fishpond, the water temperature in the fishpond is reduced to be within the range suitable for growth of perches, meanwhile, through the mild water temperature adjusting mode, rapid change of the water temperature is avoided, the perches can gradually adapt to the water temperature change, and the perches can grow more conveniently. And stress reaction caused by sudden drop of water temperature is avoided.

The utility model discloses efficient perch culture filtering equipment, which relates to the technical field of culture equipment and comprises a mounting box body, an efficient filtering unit and an impurity discharging unit, the efficient filtering unit comprises a water storage barrel, a water collecting pipe opening, a fine net film, an annular water tank, a turning and raising plate and an impeller. Aquaculture wastewater in the water storage cylinder can be in an active state through stirring and turning, water in a rotating state obtains impulsive force, when the aquaculture wastewater makes contact with the fine net film close to the side wall, fish manure and other fine sundries in the wastewater can be isolated outside, clear water enters the water collecting pipe opening, and the water collecting pipe opening is sealed. The device is further provided with an impurity discharge unit, and a PLC controls a motor and a waterproof motor to intermittently and alternately operate, so that circulating switching between the filtering state and the pollution discharge state of the device is achieved, and the device is high in practicability. Therefore, the culture wastewater in the fishpond can be stably filtered for a long time.

The invention discloses a special feeding method for sea farming of perches, and relates to the technical field of perch breeding and breeding, and the method comprises the following steps: S1, inner and outer support culture; s2, rotary feeding; s3, moving blocking; and S4, cleaning the feeding residual feed. After the movable sleeve is in contact with the culture box, the feeding area of the weever is temporarily closed relative to the side part of the culture box, so that the impact of seawater flow on feed is reduced, and the feed flowing out of the movable sleeve is reduced; therefore, attachments on the surface of the breeding box side net are rubbed and fall off, the cleanliness of the breeding box is improved, the time that the breeding box needs to be periodically pulled out of the water bottom to be cleaned and replaced is prolonged, and the situation that excessive algae are attached to the surface of the breeding box side net to block meshes or shellfish scratches fish skin is avoided; and the culture box can be supported.

The utility model relates to the technical field of culture pond cleaning, in particular to a weever culture pond bottom cleaning device which comprises an installation base, a pipe connector, a hoop, a water pipe, a supporting rod and a driving assembly. The pipe joint is mounted on the mounting seat, and the bottom end of the pipe joint extends to the lower part of the mounting seat; a stirring assembly for stirring and crushing deposited impurities at the bottom of the pool in a cleaning state is rotationally mounted at the bottom end of the pipe joint; the supporting rod is installed on the upper end face of the installation base and used for moving the stirring assembly placed on the inner side of the culture pond in the cleaning state. In the process that water at the bottom of the culture pond is sucked to the outer side, the stirring assembly is driven by the driving assembly to rotate at the suction opening of the pipe connector, so that the stirring assembly is in contact with sludge at the bottom of the culture pond and fish food with large volume such as fish and shrimps in the water and strikes and crushes the fish food, and the sludge and the water are mixed and are convenient to discharge; fish food is smashed, the size is reduced, and the bottom suction opening of the pipe connector is prevented from being blocked.

The invention relates to the technical field of microorganisms, and provides a plant lactobacillus strain which is separated from an intestinal tract sample of wild fish in a Danjiangkou reservoir. Experiments prove that the strain has relatively high acid resistance and bile salt tolerance, and has certain bacteriostatic ability to vibrio parahaemolyticus, vibrio alginolyticus, aeromonas veronii, aeromonas cainea and aeromonas hydrophila. The invention also provides an aquatic feed composition comprising such a strain. The aquatic feed composition containing the DY-JY3 strain can promote growth of largemouth black bass, improve immunity and digestive enzyme activity and adjust intestinal flora, so that the aquatic feed composition has remarkable potential in the aspect of being a probiotic candidate strain in aquaculture application, and a new microbial intervention strategy is provided for anti-infection treatment of fishes. The strain and the composition provided by the invention have wide application prospects in the field of aquatic products.

The application discloses a kind of sea bass fry hatching equipment and hatching method, it is related to sea bass hatching aquaculture technical field.A kind of sea bass fry hatching equipment, it includes hatching pool, height adjustment component and multiple fish egg nests, height adjustment component is set in hatching pool;Height adjustment component includes connecting ring, height adjustment ring and multiple first rotary rods, height adjustment ring is set in the inside of connecting ring, first rotary rod is vertically in hatching pool, and first rotary rod is connected with height adjustment ring;Multiple fish egg nests are spaced apart on height adjustment ring, and the bottom of hatching pool is provided with heating assembly.The application can be adjusted according to different sinking depth by the matching use of height adjustment ring and first rotary rod, so that the sinking depth of fish egg nest inside hatching pool.

The invention relates to the field of bioengineering, in particular to a perch collagen peptide as well as a preparation method and application thereof. The invention provides a preparation method of perch collagen, which comprises the following steps: carrying out acid extraction on pretreated perch scales, hydrolyzing with a first enzyme, filtering, salting out filtrate, centrifuging, collecting precipitate, redissolving, purifying, hydrolyzing with a second enzyme, and heating to obtain the perch collagen, enzymes adopted by the first enzyme hydrolysis and the second enzyme hydrolysis can be the same or different; the enzyme comprises one or more of alkaline protease, papain, subtilisin and pepsin. The collagen peptide extracted from sea bass scales and processed into the sea bass scales is systematically researched and developed, and the collagen peptide has an excellent anti-photoaging effect and high replicability. The collagen peptide is low in molecular weight, high in oxidation resistance and wide in application range, and can be applied to the fields of cosmetics, oral collagen supplements and the like.

This invention provides a method for constructing a liver injury model in largemouth bass and its application, belonging to the field of aquatic pharmaceuticals. The construction method includes the following steps: 1) Intraperitoneal injection of thioacetamide into largemouth bass at a dose of 100-150 mg / kg body weight, once; 2) Obtaining the model after 6-15 days of conventional rearing. This invention enables model creation with a short cycle, low cost, good reproducibility, and simple operation, solving the problem of high animal mortality in existing technologies for creating acute liver injury models.

The present application relates to the technical field of fish egg hatching, and specifically discloses a hatcher for improving the hatching rate of perch eggs, which comprises a cylindrical shell, a drainage port is formed in the middle of the top side of the shell, a plurality of water outlets are mounted on the edge of the bottom side of the inner cavity of the shell, a conical shell with a pointed top is fixed in the middle of the bottom side of the inner cavity of the shell, a circular pipe body is mounted above the conical shell and arranged vertically, a plurality of partitions are fixed on the inner wall of the pipe body, the pointed top of the conical shell extends into the pipe body, and the gap between the conical shell and the pipe body is 1.0-10.0 cm. In the hatcher, the perch eggs move up and down in the water without contacting the filter screen, so that the perch eggs are prevented from being mechanically extruded, and the hatching rate of the perch eggs is improved.

The invention relates to the technical field of aquaculture feed additives, and discloses a sulforaphane-containing weever anti-stress powder additive as well as a preparation method and application thereof. The natural plant extract sulforaphane, the high-quality protein source, the compound vitamins and the mineral substances are scientifically proportioned, so that the survival rate and the meat quality of the perches under the adverse conditions of high temperature, low oxygen, transportation and the like can be remarkably improved. The feed additive adopts a low-temperature granulation process, can effectively maintain the stability of active ingredients, and ensures that the active ingredients do not lose efficacy in a long-term storage process.

This invention belongs to the field of food packaging technology, specifically disclosing a packaging device and method for grilled sea bass. It includes a main structure and an upper shell distributed above the main structure. A dragging structure is arranged on the upper part of the main structure, and an extrusion structure is arranged on the lower part of the upper shell. The dragging structure includes a dragging frame fixed above the main structure and a connecting frame fixed to the inner wall of the dragging frame. Packaging slots are evenly distributed on the connecting frame. In use, the lower packaging material is pre-placed on the connecting frame, then the grilled fish is placed on the lower packaging material, and then the upper packaging material is placed below the extrusion structure. When the extrusion structure abuts against the connecting frame, the upper packaging material cooperates with the lower packaging material to package the grilled fish. This invention achieves fully automated operation from packaging material positioning to finished product output through integrated automatic material laying, vacuum sealing, integrated cutting, and automatic separation and unloading mechanisms.