1949 results about "Shellfish" patented technology

The invention discloses an artificial fish reef which comprises an artificial fish reef body, and is characterzied in that the artificial fish reef body is in an inversed Y shape; the inversed Y-shaped artificial fish reef body is composed of an upper part unit, a left lower part unit and a right lower part unit which are cast by reinforced concrete into a whole, wherein the upper part unit is ina vertical downward arrow shape which is formed by an upper left oblique post, an upper middle post and an upper right oblique post; the left lower part unit is in an upward and inclined right oblique arrow shape, and is formed by a left lower left oblique post, a left lower middle post and a left lower right oblique post; and the right lower part unit is in an upward and inclined left oblique arrow shape, and is formed by a right lower left oblique post, a right lower middle post and a right lower right oblique post. According to the invention, the artificial fish reefs are combined and stacked to construct a place for spawning and perching of fishes, and in case that a plurality of artificial fish reefs are combined, the stability and dynamic property of the artificial fish reef can be greatly improved. The artificial fish reef provided by the invention can be used for proliferation of shallow-water-type rocky fishes, shellfishes and algae in a shallow water area of a water depth 6-10 meters.

The invention provides a shrimp-fish-shellfish-alga multi-unit culture and aquatic organism regulation system thereof. A shrimp culture zone, a fish culture zone, a shellfish culture zone, a large scale alga cultivation zone, a probiotics and microalga culture zone, a water processing zone and an emergency drainage system are arranged in a closed water circulation culture system, wherein the culture water circulates in different culture and water processing units. As the water circulates in different culture units and is utilized in multiple levels by various aquatic organisms of different trophic level and ecological niche, the system gives the various aquatic organisms full play to the positive bait resource complementarity, prevents the aquatic organisms from directly competing on living space and dissolved oxygen and reduces the mutual damage caused by organic remains and metabolic waste, achieves the 'self-modification' and 'biomanipulation' of the culture environment, enables the environment itself to recover from the pollution in culture process, and decontaminates the seawater culture environment.

The invention discloses an ecological seawater rare fish factorization circulating water aquaculture system which comprises an aquaculture pond, a primary filter tower, an albumen segregator, a primary biological filter tower, a secondary biological filter tower, a tertiary biological filter tower, an algae treating pond, a source water filter pond, a UV (Ultraviolet) sterilizer, a temperature adjusting pond, an arc-shaped sieve, a primary sedimentation pond and a secondary sedimentation pond. A bidirectional drainage system is adopted by the aquaculture pond, the water containing less smaller particles at the lower part of the pond and the water containing more larger particles at the bottom of the pond are respectively drained and then input into different processing units for recycle. Molluscs, sea cucumbers and algae are drawn into aquaculture waste, wastewater disposal and resource utilization by the circulating water aquaculture system, so that the circulating water aquaculture system has an obvious ecological characteristic. The ecological seawater rare fish factorization circulating water aquaculture system has the advantages of high treatment efficiency of aquaculture wastewater and rubbish, simpler equipment, low energy consumption, high backwash efficiency, resource utilization of aquaculture wastewater and rubbish, less circulation supplement water, high treatment efficiency of inorganic nutrient salt in the water and high economic additional value.

A method of aquaculture is applicable to a novel culture arrangement for diversified farming of generally deep sea fin fishes, shrimps, and shellfishes. A pre-manufactured enclosed cultivation tank is provided and air compressor facility is included for pressurization and oxygenation so as to make the interior of the cultivation tank a pressurized water environment of predetermined high pressure. A low pressure siphon tube is included for sucking and removing excrements from the cultivation tank and to realize water replacement in a natural manner thereby providing a deep sea mimicked clean cultivation environment. The drained water is subjected to multiple steps of filtration and purification for separating the excrements from the water and for purifying water to allow cyclic use of the water. An arrangement of multiple cultivation tanks allows for diversified and multi-species cultivation of fishery products and deep sea fishes.

The invention discloses a method for removing water eutrophication, which comprises the following steps of: investigating a community structure of aquatic organisms in water body, and finding a missing link or broken link in a food chain according to an investigation result; stocking predacious fishes in the water body, removing small trash fishes and herbivorous fishes from the water body by adopting a medicament mode or a manual fishing mode, and regulating the community structure of the fishes in the water body; planting submerged plants, floating plants and emergent aquatic plants in the water with the depth of 0 to 1.5m; and stocking filter-feeding fishes, filter-feeding shellfishes, detritus feeding benthonic animals and herbivorous fishes in the water body. The method for removing water eutrophication can realize the removal of the water eutrophication and ecological restoration for large-scale water body of which the parameters cannot be manually controlled, effectively inhibit the outburst of algal bloom and keep the stable quality of the water body.

The present invention discloses a composition and method of providing ionic forms or compounds of any combination of three metals to produce a product that can be used as a antimicrobial as defined by the U.S. Environmental Protection Agency (EPA) such as a hard surface disinfectant and as a foliar spray or water treatment for the control of various diseases in garden row, field and tree crops, on hard surface areas such as equipment from infected fields or in hospitals, homes, etc. as well as against a wide range of human, plant and animal diseases. Additionally, the composition of the present invention is able to be used to coat and otherwise treat and disinfect food products such as but not limited to fish and shellfish, meat, milk, poultry, eggs and irrigated crops (both food and nonfood crops) as well as non food products as defined in the EPA exemption from tolerance for copper and copper products. The composition may include inerts such as surfactants, detergents and buffers to adjust the pH. The composition remains soluble in water and is useful efficacious against the spread of bacteria, viruses and fungi and other pathogens within a source of water such as a reservoir or pool. Alternatively, the composition may be in aerosolized, misted, vaporized, fogged, humidified forms to produce micronized particles which are able to remain in suspension in the air for long periods of time in order to act on air-borne fungal spores and / or pathogens.

There is described a substrate to which is applied, coupled or cross-linked to at least one part of said substrate an allergen wherein said allergen is a protein derived from an extract selected from at least one of the following food groups: cereal, legume, cocoa bean, nut, fruit, vegetable, shellfish, fish, yeast, dairy product, egg and meat.

The invention relates to element-negative-ion-releasing sterilizing mite-preventing electromagnetic-wave-preventing fire-retarding nano-grade fabric used in vehicles. The invention belongs to the technical field of textile fiber fabric production of vehicle-use nano-grade decorative fabric with functions of refreshing and air-purifying. The fabric is a nano-grade functional healthy textile. The nano-grade fabric provided by the invention is produced form chitosan, which is a natural high polymer extracted from shells of shellfishes, crabs and shrimps; a natural antibiotic humectant SCJ-920; a high-efficiency mite-preventing antibacterial agent SCJ-998; nano-grade negative-ion powder SCJ-900; negative-ion far infrared healthcare slurry 700; a fire retarding finishing agent ATF; an aromatic finishing agent SCM; electromagnetic-wave-preventing ferrites Fe2O3, Fe3O4, and Fe; substances such as TiO2, Al2O3, and ZnO used for providing far infrared radiation; an Ag-embedded nano-TiO2 (AT) antibacterial agent; nano-grade selenium or organic selenium which is rare on earth; organic germanium, Chinese herbal medicines, essential oil, maifanite, tourmaline nano-grade powder and other materials. A mixture of the materials is added to cotton, linen, wool, silk, polyamide fiber, acrylic fiber, terylene or viscose fiber spinning liquid, and the nano-grade fabric is produced through weaving.

This invention relates to a method of manufacturing the fertilizer made from organic wastes such as food wastes, human excrements, animal excrements, slaugterhouse waste, henhouse waste, fish and shellfish wastes, vegetable wastes and agricultural wastes. Various wastes are mixed and crushed into certain sizes, processes for adjusting the water content, put into the treating tank and digested by mixing a calcined lime. The present invention utilizes a dolomite or mixture of calcined lime and dolomite to provide the first treatment material. This first treatment material is mixed with the supplement material such as charcoal, saw dust, loess, zoelite, chaff, or shell powder to give compost fertilizer. It is also mixed with agricultural products such a watermelons or melons which ferment to provide a special fertilizer for the agricultural product. The treatment material can be added to water and mixed with mugwort, medicinal herb, zeolite, loess, and then extracted to provide a liquid fertilizer. As the various organic wastes are changed to organic fertilizer, the acidified soil is improved, the environmental contamination can be prevented, and the high moisturizing and the fine porous of the soil prevent drought and fertilizer loss so as to raise fertilizing efficiency.

The invention aims to provide a health care instrument adapted to measure oxidation-reduction potential in human being, animal, fish and shellfish, plant, vegetable as well as water, air or earth surrounding those organisms and thereby to determine a level of active oxygen in such subject so that the measured data may be used for health care. The object set forth above is achieved by a health care instrument containing an oxidation-reduction potential measuring function comprising a main body, a power source consisting of a battery with or without a battery charger and an oxidation-reduction potential measuring unit both contained in the main body, a measuring probe attached to one end of the main body, a sensor included in the measure probe so as to be connected to the oxidation-reduction potential measuring unit, and a display unit provided on a part of the main body to display the measured oxidation-reduction potential value. The health care instrument according to the invention allows the oxidation-reduction potential in the subject to be easily determined in order to know a condition of the subject's health or growth. The health care instrument allows an internal abnormal condition to be detected and thereby allows the subject to be prevented from being affected by disease. Thus, the health care instrument according to the invention effectively contributes to health care.

The invention relates to a green Chinese traditional medicine feed for feeding livestock and poultry, belonging to the rural area stock raising field. The feed is characterized in that the feed is prepared by the mixing of bean pulp of cooked soybean, rape seed cake, cotton cake, fish meal, bone meal, shellfish powder, umbilicus pulp of corn, urea, multiplex vitamin, magnesium sulplate, sodium bicarbonate, Chinese traditional medicines of angelica, tuber fleeceflower, notoperygium root, dried tangerine peel, ledebouriella root, radix codonopsis pilosulae, medicated leaven, rmalt, atractylodes rhizome, Chinese date, milkvetch root, liquorice, prepared rhizome of rehmannia, Chinese goldthread, mucuna macrocarpa, chuanxiong rhizome, frankincense, radix salviae miltiorrhizae, yellow-corktree bark, kuhseng, pine branch, hawkthorn, ginger powder, Chinese anise and carrot powder, micro elements of copper, iron, zinc, manganese, selenium and potassium and amino acids of methionine and threonine. The invention is a green Chinese traditional medicine feed for livestock and poultry, can make all stock raising animals such as pigs, cattle, sheep and poultries absorb nourishments in high efficiency and improve the capability of resisting viruses and bacteria, and can prevent illness and plague; moreover, the meat of the animals fed by the feed meets the national green meat product standard.

The invention relates to a paraffin wax slicing method of ocean shellfish oocytes, comprising the steps of fixing, dehydration, clarity, waxdip, imbedment, slicing, dyeing, mounting, and the like. Theparaffin wax slicing method is characterized by solving the problem of the difficult waxdip and imbedment of the ocean shellfish oocytes due to small volume, improving a hematoxylin-eosin dyeing method and obtaining favorable slicing and dyeing effect. The paraffin wax slicing method is simple and easy to operate without adding instruments or equipment, can carry out paraffin wax slicing on mostof the ocean shellfish oocytes with the diameters more than or equal to 40 micrometers, transition steps are carried out among the dehydration, the clarity and the waxdip of the steps and mostly in two-step processing so that a reagent gradually and completely enters a tissue and is preserved in the original structure of the tissue in an intact way so as to provide an effective researching means for shellfish fertilization and early embryonic development research.

An three-dimensional intensive culture technique of shrimps, crabs and shellfish in a seawater pond comprises the following steps: the pond is cleaned up before stocking, the bottom of the pond is solarized, a central canal and a circular canal are excavated, and feed water is disinfected and sterilized with medicines; fresh seawater is fed, the water quality culture, fertilization and algae culture are carried out, a lifting device for a swimming crab breeding cage is prepared, and lines are parallel set up at the two ends of the culture pond with each line spaced 50cm; and 30cm higher than the surface of the water, the cage is suspended every 50cm, the inside of the cage is provided with fine sand, the outside of the cage is sheathed with a plastic netting, benthonic seashells are put into the cage for the first, and the stocking density is 30 benthonic seashells per mu, then the stocking of prawns is carried out, and the stocking density is 5000 prawns per mu. By adopting the three-dimensional multi-species hybrid culture technique of shrimps, crabs and shellfish in a seawater pond, the water layers of the stocking ponds can be fully utilized, the utilization rates of each water layer of the stocking ponds, stocking devices and manpower are further improved, the water purification capacity of the seashell can be fully utilized, and the swimming crabs are suspended in a cage, thus avoiding cannibalism and catching and killing the shrimps and seashells in the same pound; Furthermore, the three-dimensional intensive culture technique provides adhesion and sheltering objects for prawns, and achieves the purposes of improving yield and increasing economic benefits.

The invention relates to nuisance free large-size river crab ecological breeding method. The method comprises: exposing breeding pool in sun after drainage, fertilizing the pool, planting aquatic grass, migrating seashell for mixed breeding, determining breeding density according to a certain quality and quantity proportion, choosing uniform size ,vigorous individual, regulating and controlling the water quality, insuring oxygen content and the slight alkalinity of water pH. The pool has optimal breeding density, crabs are not influenced by disease, and antibiotics is not needed.

The invention (the process, its supporting devices, and applications) serves the endeavor of shellfish aquaculture. The invention improves and innovates: 1) tidally powered systems for raising shellfish seed, 2) grow-out, 3) brood stock conditioning, 4) market conditioning, & food supplement, 5) hatchery systems, 6) hatchery / nursery integration, resource sharing and optimization, ergonomics and economics, 7) water treatment, 8) Propulsion, 9) Anchorage, 10) Security, and 11) Devices for the Integration of Neighborhood Values and Shellfish Production. Such large increased economies of production suggest new uses for shellfish. Shellfish grow-out can provide cost effective and ecologically advantageous infrastructure benefits to eroding beaches, unstable channels, and water quality and the health of estuaries in general. The system is flexible in operation so that it may maximize the use of estuarine tidal energy and phytoplankton in order to maximize the ecological and economic benefits of the operation. The system is designed with particular attention to Virginia and Federal law so that permitting needs are minimized. Moreover the system is optimized to fit in well with the estuarine community and be a desirable, unobtrusive neighbor.

The invention relates to an ecological trepang culture method in silt sandy ponds in coastlands, which belongs to the aquaculture field. The method comprises the steps of setting a pond, setting trepang reefs, disinfect the pond, controlling feed water, cultivating feedstuff, stocking young trepang and managing culture. The feedstuff culture which is performed in April to May comprises the following steps: firstly, transplanting benthic diatom in a height of 0.8 to 1 m feed water depth in the pond in the prior period, with 5 to 10 L of benthic diatom liquid per Chinese acre; secondly, transplanting ruppia maritime and amphilhoe japonice, especially, integrally transplanting ruppia maritime through pulling up by the roots according to the quantity of 5 to 15m per square meter, and transplanting amphilhoe japonica according to the quantity of 1.5 to 3 kg per Chinese acre after the transplanting of ruppia maritime; thirdly, poly-culturing mussel organism; fourthly, feeding water to the pond to the depth of 3 to 4 m, and stocking prawns according to the quantity of 500 to 1500 per Chinese acre. In the method of the invention, ecological feedstuff is adopted for transplanting and polyculture, therefore, not only the cost of artificial feedstuff is saved, but also the natural ecological environment is created for trepang culture.

The invention provides a sinonovacula harvesting machine, and belongs to the technical field of fishery machines. The sinonovacula harvesting machine solves the problem that an existing sinonovacula harvesting device is low in efficiency and has dead angles in the harvesting process. The sinonovacula harvesting machine comprises a rack, a driving and steering mechanism and a sinonovacula collecting mechanism, wherein the driving and steering mechanism is used for driving the rack to move forward. The sinonovacula collecting mechanism comprises a support fixedly connected at the front end of the rack. A sinonovacula lifting device which is of an inclined plane shape is arranged at the lower end of the support. A conveying mechanism is further located on the support at the tail end of the sinonovacula lifting device. A sinonovacula frame is arranged at the tail end of the conveying mechanism. A spraying silt-removing device is further arranged at the upper end of the conveying mechanism. According to the sinonovacula harvesting machine, the sinonovacula collecting mechanism is used for scooping up sinonovacula, a conveyer belt is used for conveying the sinonovacula, the spraying silt-removing device is used for removing silt on the sinonovacula in the conveying process, so that the structure is simple in the process of collecting the sinonovacula, and the sinonovacula is clean. The sinonovacula harvesting machine has the advantages of being reasonable in structure, convenient to use, and free of dead angles in the harvesting process, greatly lowers harvesting cost, improves work efficiency, and can simultaneously harvest other shellfishes in intertidal zones and sinonovacula ponds.

The invention discloses a floating artificial fish reef. During preparation, the floating manual fish reef is characterized in that an adhesion base material is bonded to a floating body material and a suspender by using an adhesive or cement, the suspender is suspended below the floating body material after being cured, and a counter weight is suspended below the suspender. The floating artificial fish reef is arranged on the euphotic layer of sea water in an aquaculture zone, so that the adhesion growth of algae, shellfishes and microorganisms is facilitated, the water quality of the aquaculture zone is improved, and the generation of eutrophication is inhibited.

The invention discloses a device for ecologically culturing seashell and alga in shallow sea and a method thereof. The device comprises a seashell culture raft and an alga culture raft. The seashell culture raft comprises at least two paralleled floating ropes; buoys are arranged on the floating ropes and are connected with the floating ropes through floating ties; the two ends of each floating rope are fixed by underwater fixing mechanisms; the alga culture raft made by at least one culture curtain is arranged above each two adjacent floating ropes; the adjacent culture curtains are fixed by floating bamboo perpendicular to the floating ropes; and the two ends of the floating bamboo are connected with the floating ties. The device can be used to carry out the hanging culture of the seashell on the floating ropes and carry out the culture of the alga in the culture curtains floating above the floating ropes, thereby realizing the composite culture of the seashell and the alga. The device and the method have the advantages of reducing the culture cost, improving the culture efficiency and culture space utilization factor, and having good effects on the comprehensive use of shallow sea waters, the improvement of the water environment and the prevention and control of diseases.

The invention discloses an aquatic product sterilizing pre-treating and cold-preserving method. The method comprises the steps of: firstly, washing an aquatic product by cold water to remove dirt and impurities; secondly, soaking the washed aquatic product in sub-acid electrolysed water or stirring for sterilization; placing the sterilized aquatic product in a foam preservation box and covering the sterilized aquatic product with preservation ice; and finally sealing the box. By using the method, the spoilage caused by microorganism pollution can be effectively restrained and the shelf life of the aquatic product can be prolonged; the preservation ice can be used for lowering the temperature and slowing down a series of biochemical reactions of the aquatic product; the water formed by melted ice during storage and transportation can play a further sterilization role; the sub-acid electrolysed water has a broad spectrum and high-efficient sterilization effect and especially can be reduced to water after reacting with organic matters; compared with the current other sterilizing agents, the sub-acid electrolysed water is safe without residues and is friendly to human bodies and environments; and the sub-acid electrolysed water is moderate in reacting functions and hardly has influences to the quality of meat. The method is not only applicable to preservation of fresh foods such as fish, shrimps and shellfish, but also applicable to the preservation field of meat products.

The invention relates to a prawn culture technique, in particular to a closed circulating seawater prawn pond culture system, which sequentially comprises a square or round culture pond, a round or square, corner-rounded vertical flow sedimentation pond, a comprehensive shellfish and algae treatment pond and a constructed mangrove wetland; the area of a single culture pond is 0.4 to 0.6 square meters, the culture pond consists of 2 to 3 prawn ponds, the pond depth is 2 to 2.2 meters, and the water depth is 1.6 to 1.8 meters; a circumferential inner wall (2) of the vertical flow sedimentation pond is inclined upwardly, the upper edge of the vertical flow sedimentation pond is provided with an annular water outlet channel (1) and a water outlet pipe (8), a mud-collecting pit (5) is arranged at the center of the bottom of the vertical flow sedimentation pond, and is connected to the outside of the pond through a mud discharge pipe (4), a central pipe (3) is arranged over the mud-collecting pit (5), and is supported and fixed by a support (6) at the center of the bottom of the vertical flow sedimentation pond, the lower part of the central pipe (3) is provided with a reflective plate (7), and a water inlet pipe (10) connected into the pond is extended into the lower part of the central pipe (3); the vertical flow sedimentation pond is 2.5 to 3 meters deep, and the water depth is 2 to 2.5 meters; the water depth of the comprehensive shellfish and algae treatment pond is 1.6 to 1.8 meters, and filter-feeding shellfish and algae are cultured in the pond by way of hanging; and the hydraulic power of the constructed mangrove wetland stays for 12 to 24 hours. In the culture system has the advantages that the polluting substances produced in the process of prawn culture can be fully and effectively removed, the structure is simple, the removing efficiency is high, the occupied floor area is small, energy can be saved, and emission can be reduced.

The invention discloses a cosmetic containing oceanic shellfish active peptide and a preparation method and application thereof. The cosmetic contains 0.1 to 10 percent of oceanic shellfish active peptide, or 0.1 to 10 percent of oceanic shellfish active peptide and 1 to 10 percent of hyaluronic acid, or 0.1 to 10 percent of oceanic shellfish active peptide, 1 to 10 percent of hyaluronic acid and1 to 25 percent of vitamin C (VC), and the balance is cosmetic matrix components. The peptide is formed by boiling, ultrasonic, enzymolysis and ultra-filtration of oceanic shellfish meat; and besidesthe active peptide, the oceanic shellfish meat also contains free amino acid, glycosaminoglycan, polyunsaturated fatty acid, vitamins, trace elements and the like. The problems of application and thelike of the oceanic shellfish active peptide in the cosmetic are solved; and the prepared cream, emulsion, aqueous agent, gel, aerosol or mask has more complete and remarkable skin-care or hair-care effect. After the hyaluronic acid and the VC are added, the effects of preserving moisture, increasing the elasticity and the smoothness of the skin, removing flaws and improving the skin color are remarkably enhanced.

The invention provides a method for preparing a nutritious flavoring by using shellfishes and by-products of shellfishes, which can be widely applied to the fields of foods, grain and oil, beverages, wines, and the like. The method mainly solves the problems that the currently developed and used extraction processes and application techniques of nutrients and active ingredients of shellfishes areoutdated, by-products obtained by rough machining are discharged directly, resources are wasted, the environment is polluted, the deodorization and impurity removal of products are not performed thoroughly, the structure and form of a product are not reasonable, and a value added problem is not solved fundamentally.

The invention provides an account receivable circulation method based on a block chain technology. The account receivable circulation method comprises the steps that an alliance block chain network and an alliance block chain auxiliary service network are constructed based on supply chain ecology; account payable data is captured and the account payable data is linked by an online core enterprise;The core enterprise generates a chain shell on the basis of the account payable data of the core enterprise, and digitalizes the account receivable of the corresponding supplier; The chain shells areissued to corresponding suppliers on the chain; online chain shellfish circulation is carried out; When the chain shellfish expires, the chain shellfish is cancelled, and the core enterprise pays accounts needing to be paid; Chain shellfish generation, chain shellfish issuing, chain shellfish circulation and chain shellfish logout are carried out on the alliance block chain in a circulating and reciprocating manner; Rapid flow of receivable accounts is realized, and arbitrary splitting and turnover of receivable amounts and deadlines are realized.

The invention provides a seedling inserting rope-shell combined artificial algal reef, comprising a frame type bottom groove which is formed by welding reinforcing steel bars, wherein the bottom groove comprises a bottom surface and four lateral surfaces. A steel plate is welded on the centre of the bottom surface, a vertical rod is welded on the centre of the steel plate, the other end of the vertical rod is welded with a steel ring, the steel ring is connected with the bottom groove through the seedling inserting rope, and a shell net bag is arranged in the bottom groove. The net bag made of waste shells are put into the frame type bottom groove to form a biological closeness reef and realize the resource utilization of the waste shells, so the algal reef has advantages of economic, simple and convenient. The invention adopts the seedling inserting ropes to insert the seaweeds and adopts the rough surfaces and porous structures of the shells and the spaces among the shells to provide a good habitat for microorganism and food organism or provide a best environment for rooting the seaweeds. When a certain number of the seaweeds are bred, a large number of oxygen can be produced, and carbon dioxide in the water can be reduced, so that the water can be purified, and the red tide can be prevented.

Methods and constructs for genetic manipulation of one or more of shrimp, shellfish, mollusks, and fish are disclosed. The nucleic acid construct includes a promoter and an internal ribosome entry site of an insect picomavirus, such as a cricket paralysis-like picomavirus. One or more open reading frames can be operably associated with one or both of the promoter and the internal ribosome entry site, and one or more proteins or protein subunits can be expressed upon introduction of the construct into a host cell, such as into a shrimp. Method for producing immortalized crustacean cell lines using enhancer elements derived from shrimp and / or shrimp viruses are also described.

The invention discloses a method for constructing ntaxial system ecology for fishes, grasses and shellfishes in the fresh-water substance, which is characterized by effectively combining the ecological character of water with the ecological and physiological properties of aquatic organisms to build and repair the ecology of the water substance by the synergy of the symbiotic mode of various organisms such as sunken plants, emergent aquatic plants, floating plants, shellfishes, filter fishes, carnivorous fishes, predatory fishes, omnivorous fishes and herbivorous fishes, giving full play to theself-purification capacity of the ecological system of the water substance, controlling pollution to the water substance and protecting the environment of the waters. The method of the constructing ntaxial system ecology for fishes, grasses and shellfishes in fresh-water substance of the invention can be suitably popularized in and applied to waters such as rivers, lakes, pools and streams.

The invention discloses a shellfish discharge device for artificial breeding. The shellfish discharge device is low in labor intensity, suitable for large-batch discharge, good in discharge effect and capable of improving the shellfish fry survival rate. The shellfish discharge device comprises a vertical guide rod, a guide sleeve, a vertical sleeve body, a placement barrel, a piston body, a connecting shaft rod, a connecting shaft sleeve and a lifting air cylinder, wherein the vertical guide rod is arranged on a boat body, the guide sleeve is arranged on the vertical guide rod in a slidable mode, the vertical sleeve body is arranged on the boat body, the placement barrel is arranged in the vertical sleeve body in a slidable mode, the piston body is arranged in the placement barrel in a slidable mode, the connecting shaft rod is coaxially arranged on the piston body, the upper portion of the connecting shaft rod is sleeved with the connecting shaft sleeve, and the lifting air cylinder is arranged on the boat body and used for lifting the connecting shaft sleeve.