341 results about "Euphausia" patented technology

The invention provides a method for preparing low-fluorine Euphausia superba protein base materials. The method is characterized by freezing and grinding the Euphausia superba, extracting proteins under alkali condition, precipitating and separating the proteins under acid condition and acid-washing the precipitated proteins for defluorination, thus preparing the products. The water contents of the products are 82-87% and the fluorine contents of the products are lower than 2mu g / g wet basis. The method is simple and effective, can ensure the recovery rate of the crude protein of the Euphausia superba to be 39-46%, the recovery rate of the crude lipid to be 38-42%, the content of the crude protein to be 66-71g / 100g wet basis, the content of the crude lipid to be 27-30g / 100g wet basis and the content of phospholipid to be 380-420mg / g lipid and ensure the products to have high nutritional values. The method is suitable for industrial application and the prepared products are wide in use and can serve as the accessories or base materials for preparing the Euphausia superba protein powder and other food.

The invention discloses a macculochella peelii fry initial feeding compound feed and a preparation method thereof and aims to provide a green and healthy initial feeding feed which can meet the nutrition requirement, promote the growth development, enhance the nonspecific immunity and improve the survival rate of macculochella peelii fry. The feed is composed of 25%-50% of imported white fish meal, 2%-10% of artemia powder, 3%-10% of euphausia superba powder, 1%-5% of squid liver powder, 5%-15% of seaweed meal, 2%-5% of beer yeast, 3%-10% of alpha-starch, 10%-20% of high gluten flour, 1%-5% of soya bean lecithin, 2%-8% of fish oil, 0.2%-1.0% of a vitamin premix, 1%-5% of a microelement premix, 1%-5% of monocalcium phosphate, 0.03%-0.1% of bacillus subtilis, 0.1%-0.6% of vitamin C acetate, 0.01%-0.1% of an antioxidant and 0.05%-0.5% of choline chloride. The macculochella peelii fry initial feeding compound feed and the preparation method thereof belong to the technical field of fish feeds.

The invention discloses a method of extracting Euphausia superba oil by using supercritical carbon dioxide. The method is as follows: freeze drying or heat drying is carried out on Euphausia superba, anhydrous ethanol is sprinkled after Euphausia superba is crushed and ground, uniform stirring is carried out, and supercritical carbon dioxide extraction is carried out after Euphausia superba is immersed for 1 to 2 h; flow for supercritical carbon dioxide extraction comprises the steps of standing and infiltrating Euphausia superba, carrying out static extraction for 20 to 40 m, heating an obtained extract to a temperature of 40 to 50 DEG C and carrying out dynamic extraction for 1 to 2 h. Yield of the Euphausia superba oil is 12 to 18%, and the obtained Euphausia superba oil mainly comprises, by weight, 37 to 43% of phosphatide, 13 to 18% of EPA (eicosapntemacnioc acid), 8 to 12% of DHA (docosahexaenoic acid) and 0.12 to 0.13% of astaxanthin. The method has the advantages of simple flow, stable quality, no harmful influence on environment in the process of extraction, safety and utility.

The invention discloses a production process of on-board euphausia superba mince. The production process of on-board euphausia superba mince particularly comprises the following steps of rinsing euphausia superb twice after flesh extraction, dehydrating, adding an antifreeze agent, and storing frozen euphausia superb mince at minus 24 DEG C after quick-freezing; rinsing the euphausia superb mince by fresh water or seawater again which contains 0.1-0.3% of CaC12 for one time, and then rinsing the euphausia superb mince by fresh water or seawater for the second time, thus improving the jelly strength and the whiteness of the euphausia superba mince and reducing the loss of fluorine content and nutritional components; and adding 3-5% of saccharose, 3-5% of sorbitol, 0.2-0.3% of polyphosphates, 0.1-0.3% of sodium alginate tech grade as well as 0.2-0.4% of carrageenan, thus reducing the possibility of the protein denaturation of the euphausia superba mince during the freezing process, and improving the euphausia superba mince quality and yield.

A method for obtaining hot-formed products from the liquid and dense fractions of Antarctic krill comprising the steps of separating the Antarctic krill into two fractions, a liquid fraction and a dense fraction, remixing and homogenizing these fractions and adding additives to the mixture such as salt, carbohydrates and fats, to then use an appropriate heat treatment to obtain its jellification in molds or in a heat extruder.

The invention discloses a special sea fish feed for high-density recirculating aquaculture and a preparation method of the special sea fish feed. The special sea fish feed comprises the following components: white fish meal, fish meal made in china, euphausia superba meal, whey powder, casein, methionine, L-lysine, refined fish oil, cod liver oil, vital gluten, corn starch, peanut meal, special microecologics, special algae powder, functional components, decavitamin and compound trace elements. The special sea fish feed is capable of enhancing the immunity of sea fish, improving the growth speed, the survival rate and the feed conversion efficiency, and reducing the occurrence probability of malformation and albinism, is low in bait coefficient, low in feed cost in the breeding process, and suitable for high-density recirculating aquaculture of the sea fish.

The invention discloses a euphausia superba oil extraction method. The method comprises carrying out enzymatic hydrolysis on euphausia superba processing by-products as raw materials, carrying out filtration, carrying out centrifugation treatment, carrying out freeze drying to obtain lipoprotein powder rich in euphausia superba oil, carrying out three-stage countercurrent extraction on the freeze-dried lipoprotein powder through ethanol as an extraction solvent, removing the filter residues, and carrying out evaporation to remove the solvent so that the crude euphausia superba oil rich in phosphatide and astaxanthin is obtained. The euphausia superba oil extraction method prevents by-product waste-caused environmental pollution, produces a euphausia superba oil product with high added value and improves a return rate of investment of the euphausia superba industry.

The invention discloses an ultrasonic defluorination method for whole euphausia superba. After being pretreated, the euphausia superba is soaked in a liquid medium in a working container for ultrasonic defluorination, wherein the euphausia superba is fresh whole euphausia superba, refrigerated whole euphausia superba or dried euphausia superba; the pretreatment is shell softening treatment or unfreezing; the combination type of an ultrasonic treatment device is a single-unit ultrasonic device, a two-unit ultrasonic device or a three-unit ultrasonic device; the liquid medium is a first component, a second component or a third component, the first component is water distilled for three times, deionized water, tap water or seawater, the second component is ethanol, acetone, diethyl ether or No.6 extraction solvent oil, and the third component is an acid solution, alkali solution or salt solution. The technology achieves the purpose of defluorination of the euphausia superba; the defluorinated euphausia superba is kept whole and prevented from breaking, and the sensory quality and the nutritive value are not influenced.

The invention discloses a method for preparing euphausia superba oil, a microcapsule of the euphausia superba oil and low-fluorine euphausia superba peptide by using an aqueous enzymatic method. The method comprises the following steps: thermally treating and homogenizing a euphausia superba raw material, subsequently performing enzymolysis and centrifuging, wherein the centrifuged enzymatic hydrolysate is divided into four layers, respectively including a free oil layer + an emulsion layer I, a water layer, an emulsion layer II and a residue layer from top to bottom; collecting the free oil layer + emulsion layer I and the emulsion layer II, taking the free oil layer + emulsion layer I and the emulsion layer II as core materials, heating and mixing Arabic gum and gelatin to obtain a mixed solution which is taken as a wall material, emulsifying, homogenizing and then performing spray-drying to obtain a euphausia superba microcapsule; filtering the water layer by a ceramic membrane, carrying out vacuum concentration on the filtrate and then spray-drying to obtain low-fluorine euphausia superba peptide powder. The method disclosed by the invention is green, friendly to environment and free of solvent residues, prevents unsafe factors such as solvent residues caused by a solvent method and overcomes the problem of incomplete extraction of lipid compositions in a supercritical fluid extraction method; moreover, the method disclosed by the invention is used for respectively preparing the euphausia superba oil, the euphausia superba microcapsule and the low-fluorine euphausia superba peptide, so that the variety of euphausia superba oil products is enriched.

The invention discloses a feed with low fish meal content. The feed comprises the following components in parts by weight: 5-8 parts of import fish meal, 10-12 parts of chicken meal, 4-6 parts of meat and bone meal, 1-2 parts of spray drying blood powder, 4-6 parts of concentrated soybean protein, 8-12 parts of corn protein powder, 15-18 parts of peel-removing soybean meal, 7-10 parts of peanut meal, 2-3 parts of euphausia superba powder, 3-4 parts of Saccharomyces cerevisiae powder, 0.30-0.40 part of yeast extract, 0.20-0.30 part of mannan oligosaccharide, 0.01-0.02 part of Eucommia ulmoides leaf extract and 0.10-0.12 part of natural xanthophyll. The invention further discloses the application of the feed with low fish meal content. The feed with low fish meal content keeps the original effect in terms of growth performance and body color.

The invention discloses a processing method of euphausia superb flavor composite shrimp mince products. The processing method of euphausia superb flavor composite shrimp mince products comprises the following steps: 1) chopping, mixing or blending: firstly chopping, mixing or blending 100 parts of frozen fish mince after being half-unfrozen; then adding 0-0.3 part of composite phosphate and 2-3 parts of edible salt, and chopping, mixing or blending, thereby forming fish cream rich in stickiness; adding 10-20 parts of icy water uniformly during the chopping, mixing or blending process; adding 25-50 parts of euphausia superb meat mince and 10-20 parts of auxiliary materials in the fish cream, and then chopping, mixing or blending for 10-15 minutes, thereby obtaining composite paste; adding 10-20 parts of icy water uniformly during the chopping, mixing or blending process; 2) seasoning: adding 2-4 parts of seasoners in the composite paste, and then chopping, mixing or blending; 3) thermal forming: preparing the composite paste after seasoning into euphausia superb flavor composite shrimp mince thermally formed primary products in a heating mode; and 4) cooling: after cooling the primary products, preparing the euphausia superb flavor composite shrimp mince products.

The invention provides a compound feed for juvenile perches. The compound feed is characterized by being composed of following components in parts by weight: 350 to 430 of steam fish meal, 25 to 35 parts of spray blood-cell powder, 30 to 40 parts of euphausia superba powder, 30 to 50 parts of beer yeast, 150 to 200 parts of peeled soybean meal, 30 to 50 parts of corn protein powder, and 220 to 250 parts of strong flour. According to the nutrition needs, and physiological and biological characteristics of juvenile perches, aiming for improving immunity and growth speed of juvenile perches, the method adopts high quality raw materials, optimizes the feed formula, and adds a high-effective green immunity growth-promoting addictive so as to develop a compound feed for juvenile perches and achieve the goal of industrialization, thus the feeding cost and diseases are reduced, and the pollution to water body is also reduced.

The invention relates to a rapid low temperature extraction method for total astaxanthin from frozen Euphausia superba Dana. The method comprises the following steps: (1) directly adding a frozen raw material of Euphausia superba Dana into a mixed solvent of ethyl acetate and ethylene glycol monomethyl ether, crushing the frozen raw material, homogenizing obtained mixture, and carrying out centrifugation, wherein, the upper layer of an obtained solution is clear liquid of a mixed solution of ester and ether, and the lower layer of the obtained solution is a mixture of water and minced shrimp;(2) taking the clear liquid of the mixed solution of ester and ether for pressure reduced recovery of the solvent, and carrying out drying so as to obtain crimson thick grease, that is, the extract of total astaxanthin of Euphausia superba Dana; (3) dissolving the extract of total astaxanthin of Euphausia superba Dana in anhydrous alcohol to produce a solution with a concentration of 300 to 500 mg / mL, and carrying out separation and collection. The method provided in the invention has the advantages of a simple process, low temperature and a short operation time, which enables the danger of oxidation deterioration in the process of extraction to be effectively reduced; the content of total astaxanthin in the obtained product is more than or equal to 0.5%.

Relating to preparation of euphausia protein peptide mixtures, the invention provides a method for preparing a high-quality low-fluorine euphausia superba protein polypeptide mixture. By adopting euphausia superba for freezing and homogenate, the method of the invention is characterized by: adding a papain preparation with a mass ratio of 1%-2% into a homogenate liquid, mixing them well, and leaving them to 3h-5h of reaction under a stirring temperature of 50-60DEG C, then conducting centrifugation to obtain a liquid phase A and a sediment B; adding the sediment B into isopyknic water for dissolving so as to obtain a suspending solution, which is then filtered by a bolting silk of 300 meshes, thus obtaining a suspending solution C and a residue D, washing the residue D once with water so as to obtain a residue E and a suspending solution F, combing the suspending solution C and the suspending solution F and carrying out centrifugation, thus obtaining a liquid phase G and a sediment H,and subjecting the liquid phase A, the liquid phase G and the sediment H to drying so as to obtain a low-fluorine euphausia protein peptide mixture dry basis.

The invention discloses a method of preparing proteins, chitin and chitosan from degreased shrimp meals of euphausia superba. The method comprises the following steps: 1, extracting the proteins; 2, preparing the chitin; 3, preparing the chitosan. By adopting the method, the proteins with high purity, the chitin and the chitosan with high deacetylation degree are prepared from waste shrimp meals used as raw materials, and effective development and utilization of euphausia superba resources are realized; as EDTA (Ethylene Diamine Tetraacetic Acid) is adopted to carry out decalcification, the decalcification effect is good, the decalcification rate of once decalcification can reach above 95 percent, the EDTA also has a decoloration effect during the decalcification, and the dosage of hydrogen peroxide used as a subsequent decolorant is greatly saved; the used EDTA can be recycled and reused, the recovery rate can reach above 85 percent; in addition, as the reaction is carried out under the neutral and slight alkaline conditions, the characters of the obtained chitin are more stable than those of the chitin obtained by virtue of a hydrochloric acid method, and the product performance is greatly improved; the whole process technology is simple, waste water, waste slag and organic reagents generated in the production process can be all recycled and turned into wealth, and the environment pollution is also lowered.

The invention aims at providing an euphausia superba peptide replenisher containing calcium, iron and zinc. The euphausia superba peptide replenisher containing calcium, iron and zinc is obtained by combining calcium, iron and zinc metal elements with euphausiid peptide powder prepared by euphausia superba powder defatting, protease degradation and CaCl2 defluorination. The adopted raw materials of the euphausia superba peptide replenisher containing calcium, iron and zinc provided by the invention are abundant, easily available, and high in protein content; the preparation method has the advantages of being simple in process steps, low in equipment investment, free from environmental pollution, high in product yield and the like, and is suitable for industrialized production; the prepared euphausiid peptide-calcium, iron and zinc replenisher has the characteristics that the protein content is higher than 90%, and thus the product purity is high; the fluorine content is lower than 10 ppm, and thus the product safety is high; the molecular weight is mainly distributed between 2000-200 Da, and thus the water solubility is good; the essential amino-acid content is high, the composition of calcium, iron and zinc is reasonable, and three nutrients and essential amino-acids can be replenished simultaneously.

The invention discloses sturgeon fry mouth-opening bait which consists of the following components in percentage by weight: 20-40 percent of fish meal, 5-15 percent of euphausia superba powder, 5-15 percent of mussel powder, 5-10 percent of sleeve fish powder, 2-10 percent of beer yeast, 2-10 percent of cuttlefish paste, 2-10 percent of fish oil, 1-10 percent of lecithin, 5-15 percent of alpha-starch, 1-5 percent of sodium alginate, 0.5-2 percent of a vitamin premixed material, 0.5-3 percent of a mineral substance premixed material, 0.5-2 percent of monocalcium phosphate, 0.1-0.5 percent of vitamin C phosphate, 0.02-0.1 percent of an antioxidant, 0.5-3 percent of a phagostimulant and 0.1-0.5 percent of choline chloride. The invention aims to provide the sturgeon fry mouth-opening bait which has the effects of meeting the nutritional requirements of surgeon fries, promoting rapid growth of the surgeon fries, enhancing the immunity and anti-stress capability of the surgeon fries, increasing the survival rate of the surgeon fries and the like.

The invention relates to the technical field of fishery machinery and in particular relates to a euphausia superba shelling device. The euphausia superba shelling device comprises a discharging device, a homogenizing device arranged at one end of the discharging device and a shelling device arranged at the other end of the discharging device. The euphausia superba shelling device is convenient to use and has a high shelling effect when used for shelling euphausia superb.

The invention relates to aquatic product processing equipment, in particular to a device for quickly cooking euphausia superb. The device comprises a feeding system, a preheating system, a coagulating system, a discharging system and a control system. The feeding system comprises a flesh separator, a regulating machine, a buffer tank and a feeding pump. The preheating system comprises a steam sleeve, a preheating spindle, a spindle motor, a scraper and a temperature sensor. The coagulating system comprises a steam sleeve, a steam direct injection spindle, a scraper motor, a screw scraper and a temperature sensor. The discharging system comprises a buffer tank, a pipeline grinder and a delivery pump. The device has advantages that by arrangement of the external heating sleeve and the steam heating spindle with a self-cleaning function and adoption of hermetical pipeline type pumping of materials, quickness and high efficiency in cooking are realized; by adoption of the device, efficiency in cooking of euphausia superb can be improved, euphausia superb cooking time is shortened, recovery of myogen in euphausia superb is improved, and yield and quality of euphausia superb powder are increased.

Disclosed is a method for extracting phospholipid-rich krill oil from antarctic krills. The method includes utilizing antarctic krills as raw materials, performing pretreatment process of raw materials such as heating to deactivate enzyme and sterilize and soaking in alkali solution, extracting krill powder with organic solvent after removing moisture, drying and smashing, separating solid and liquid, depressurizing and distilling extracting solution separated, and removing residual organic solvent to obtain antarctic krill oil containing more than 45% of phospholipid. The method for extracting phospholipid-rich krill oil from the antarctic krills is simple to operate, finished products are high in phospholipid content, low in acid value and fine in liquidity, stability of the phospholipid oil is improved, fat quality is improved, and comprehensive utilization rate of the antarctic krills is greatly increased. Besides, the method is low in cost, safe and environment-friendly and can be used as the simplest and most feasible method for extracting oil fat, especially oil fat rich in phospholipid in the antarctic krills.

The invention discloses a process for extracting krill krill oil, co-produced protein and chellotosan from antarctic krill powder. The process comprises the following steps: 1, krill oil is extracted, wherein the phospholipid content of the krill oil is 38-45%, and the astaxanthin content of the krill oil is 240-350 mg / kg; 2, protein is extracted, and the yield of the protein extracted through the alkali-solution and acid-isolation method is 30-36%; 3, chellotosan is prepared, alkali deproteinization and acid decalcification are performed on shrimp shells, and the deproteinization and decalcification operations are repeatedly performed for two times to prepare high purify chellotosan, and the yield of the chellotosan is 13-21%. According to the invention, three types of high purify products, namely the krill oil, the protein and the chellotosan, are extracted in sequence, so that the comprehensive utilization ratio of a raw material and the added value of products are greatly improved; the antarctic krill is replaced by the antarctic krill powder, so that the rich raw material source is realized, the severe conditions are avoided during storage and transformation of the antarctic krill, and the process is suitable for large scale industrial production; during the production process, the cyclic utilization of organic solvents, waste liquor and waste residue, and high value and efficient comprehensive utilization of sources are realized.

The method discloses a method for rapidly enriching astaxanthin and ester of the astaxanthin from Euphausia superba, which comprises the steps of: adding white vitamin E (VE) powder into n-hexane, cyclohexane, petroleum ether or 6# gasoline extract of dry Euphausia superba, stirring and adsorbing for 5s for adsorbing the astaxanthin and the ester of the astaxanthin in the extract; eluting the red VE powder obtained by separation by acetone until the VE powder becomes white to obtain red paste; treating red VE dried paste by silica gel column chromatography to obtain astaxanthin ester eluate and VE eluate; respectively evaporating the astaxanthin ester eluate and the VE eluate for removing solvent to obtain astaxanthin ester and VE liquid, wherein the part which does not move downwards during column top elution is the astaxanthin; and taking out the astaxanthin part, extracting by acetone, and evaporating for removing acetone to obtain the astaxanthin. The method for rapidly enriching the astaxanthin and the ester of the astaxanthin from the Euphausia superba is rapid in adsorption and good in effect, and can be applied to a laboratory or industrial production.

The invention relates to a euphausia superba oil soft capsule which is formed by a capsule shell and content with euphausia superba oil as a main ingredient in the capsule shell. The capsule shell comprises, by weight, 6-10 parts of chitosan, 1-3 parts of propyleneglycol alginate, 3-5 parts of plasticizer, 2-5 parts of organic weak acid and 85-92 parts of water. The content comprises, by weight, 50-100 parts of euphausia superba oil and 0-50 parts of vegetable oil. The euphausia superba oil soft capsule has the advantages that the capsule shell mainly made of the chitosan and the propyleneglycol alginate and the euphausia superba oil supplement each other and perform the health functions of reducing blood fat and blood sugar level and regulating cholesterol together; the soft capsule is prepared in a drop mode, and a capsule shell material and a capsule core material can be mixed well and perform a health protection function together; the euphausia superba oil soft capsule prepared in the method contains nutrient content in balanced proportion, the bioavailability is high, the appearance is attractive, and bad odor of components can be weakened.

The invention relates to a method for preparing shrimp meal with small damage on euphausia superba in-vivo bioactive constituents, low consumption and high efficiency. The method comprises the following steps of: heating the euphausia superba to be at 90-120 DEG C and preserving for 3-10 minutes, so as to enable the protein to be sufficiently denatured and condensed; removing part of water in the euphausia superba in a mechanical mode, drying at 60-90 DEG C till the moisture content is 210-30%, and then drying at 40-59 DEG C till the moisture content is 2-9%; after the part of water in the euphausia superba is removed or dried in the mechanical mode till the moisture content is 2-9%, crushing the euphausia superba into shrimp meal. The equipment is simple, the field can be flexibly selected, the preparation method is moderate in condition, the bioactive substances of the euphausia superba and the preparation efficiency of the shrimp meal can be both considered to the maximum extent, and the preparation efficiency is greatly improved.

The invention belongs to the technical field of aquatic product culture seedling growing bait processing and relates to a euphausia superba slice and its preparation method and use. The euphausia superba slice comprises 100-120 parts of euphausia superba slurry, 12-24 parts of Anabarilius powder, 4.5-9 parts of soybean protein isolate, 3-6 parts of fish protein powder, 2.4-4.8 parts of squid paste, 1.5-3 parts of modified starch, 0.9-1.8 parts of sodium alginate, 0.9-1.8 parts of gluten powder, 0.6-1.2 parts of lecithin, 0.3-0.6 parts of multi-vitamin-mineral premixed powder, 10-20 parts of fat-rich minced shrimp, 4-7 parts of polysorbate-80, 1-2 parts of fish oil, 1-2 parts of euphausia superba oil and 30-40 parts of water. The preparation method comprises euphausia superba slurry preparation, compounding, drying, crushing and packaging. The euphausia superba slice can be used as fish and shrimp juvenile initial feed. The euphausia superba and fat-rich minced shrimp with excellent protein composition and high polyunsaturated fatty acid content are used as main raw materials and through scientific compounding, nutrition reinforcement, fast roller drying and grading ultramicro-crushing, the initial feed which is prepared from natural raw materials, is strictly graded and has a wide application range is obtained.

The invention relates to a preparation method of special dietary protein powder suitable for pregnant women, belonging to the field of foods for special dietary uses. The special dietary protein powder is mainly prepared from soybean meal and defatted peanut protein powder; food raw materials such as purple sweet potatoes, walnut kernel, lemons, euphausia superba oil, lettuce and the like are added into the special dietary protein powder, and Chinese herbal medicines such as Indian buead, Chinese dates, orange peel, malt and the like which are both used as medicine and food are also added, so that the food formula for special dietary use can be formed; the powdered food is prepared by the steps of treating raw materials, mixing, grinding into thick liquid, homogenizing, spraying powder, canning and the like; the special dietary protein powder can be eaten after being dissolved in warm boiled water. The food for special dietary use is high in solubility, good in absorptivity and balanced in nutrition, and has remarkable functions for supplementing the requirements of the pregnant women for nutrition, improving the pregnancy vomiting reaction of the pregnant women and promoting appetite.

The invention relates to a jellylike aquatic feed suitable for feeding aquarium fishes and a preparation method thereof. The jellylike aquatic feed is characterized by being prepared from the following substances in percentage by weight: euphausia superb powder, fish meal, corn starch, a water-retaining agent, vitamins, mineral substances, soybean oil, fish oil, spirulina, allicin, a thickener, an acidity regulator, an emulsifier and a preservative. The preparation method of the jellylike aquatic feed comprises the following steps: proportioning; mixing and crushing; mixing for the second time; homogenizing; sterilizing; and filling. The feed which is jellylike is soft and tasty and easy to ingest and digest.

The invention relates to a method for reducing the content of fluorine in enzymatic hydrolysate of Euphausia superb by using calcined lime, comprising the following steps of: (1) mashing the Euphausia superb, then adding distilled water for homogenating to obtain Euphausia superb pulp, and then adding Alcalase protease, carrying out enzymatic hydrolysis under the conditions with a temperature of 50-55 DEG C and a pH value of 8.0-8.5 for 220-260min, and finally killing enzyme and centrifuging to obtain enzymatic hydrolysate of the Euphausia superb; and (2) adding calcined lime with the concentration of 8-12g / L into the enzymatic hydrolysate, and stirring under the condition with the pH value of 10.0-11.5 for 40-50min; and finally filtering to obtain filtrate, i.e., the enzymatic hydrolysate of the Euphausia superb, which has reduced content of fluorine. In the invention, the calcined lime as the raw material is low in price and wide in source; and the method has a good fluorine reduction effect without lowering the nutritional value of the enzymatic hydrolysate of the Euphausia superb, and can be used for completely removing products and remained calcined lime simply after fluorinereduction, thereby having a wide application prospect.

The invention provides a cod-end euphausia superba continuous pump suction fishing system. The system comprises a euphausia net, a shrimp suction pump and a camera; a net opening of the euphausia netis connected with a trawling pulley on a hull through a trawling steel rope, a second sensor is arranged at the net opening of the euphausia net and used for collecting conditions of euphausia entering the net at the net opening, net opening shape conditions and signals of depth position of the net in water; a cod end with an opening is arranged at the tail end of the euphausia net, and the cod end is provided with a first sensor which is used for collecting the number of euphausia in the cod end and signals of depth position of the euphausia in the water; an inlet of the shrimp suction pump is connected with the opening of the cod end, an outlet of the shrimp suction pump is connected with a hose, and an outlet end of the hose is connected with a cold sea water tank / a shrimp-water separator on the hull; the camera is arranged on the shrimp suction pump and aligned to a suction port of the cod end, and electric power of the camera is provided by a composite cable. Accordingly, by adopting continuous pump suction, not only are the amount of fishing and the fishing efficiency improved, but also the quality of the euphausia is improved.

The invention discloses a high-efficiency phagostimulant for colorful angel fish and a preparation method of the phagostimulant. The phagostimulant consists of the following raw materials in percentage by weight: 15-20% of beef heart powder, 15-20% of euphausia superba meal, 15-20% of water flea meal, 15-20% of cutterfish meal, 3-5% of chironomidae larvae powder, 15-20% of compound amino acid, 2-3% of glycine betaine and 3-5% of dimethyl-beta-dimethylpropiothetin; the preparation method comprises the following steps: crushing the beef heart powder, the euphausia superba meal, the water flea meal, the cutterfish meal and the chironomidae larvae powder, screening by using a 80-mesh sieve, putting into a mixing machine, further adding the glycine betaine, the compound amino acid and the dimethyl-beta-dimethylpropiothetin, and uniformly mixing so as to obtain the phagostimulant. By compounding multiple signal phagostimulants, the phagostimulant is good in food calling effect for the colorful angel fish; when the phagostimulant is added into a fish feed, and nutrient components necessary for the growth of the fish can be provided by the amino acid in the phagostimulant, so that the phagostimulant is safe and environmentally-friendly; meanwhile, used raw materials are stable in quality, convenient to purchase and easy to popularize.