43 results about "Green Crabs" patented technology

The invention relates to a device for cultivating green crabs and a cultivating method thereof, relating to a cultivating device. The device and method can avoid fratricide and escape of the green crabs during cultivating, improve cultivating density greatly, cultivating survival rate and production rate in unit water area of the green crabs, and actually achieve three-dimensional water space using and three-dimensional cultivation of the green crabs. The device is provided with a cuboid reticular case, inside of which is provided with at least one clapboard transversely and one clapboard vertically. The cultivating method adopts grading stocking; water flow is set artificially; sweet dew is given at certain amount regularly; sterilization of spraying type is carried out for the green crabs and the cultivating device thereof. Sand filtration is processed for cultivating water; water temperature during cultivating period is kept at 19-32 DEG C, the salinity is 25-32, pH value is 7.5-8.5 and dissolved oxygen is larger than 3.0mg/L; throwing feeding is processed, that is, feed is thrown in each evening during the cultivating period.

The invention discloses an individual fluorescence labeling method for early-stage newborn green crabs to adult green crabs and relates to an individual labeling method used in aquiculture. The method comprises the following steps of: preparing a fluorescent colloid label and putting the fluorescent colloid label into a syringe for later use; before injecting the fluorescent colloid label, putting the green crabs in ice water with the temperature of between 0 and 4 DEG C to lower the activities of the green crabs; in the process of injecting the fluorescent colloid label, inserting a syringe needle into a part on which the head, chest and belly cortex of the green crab is jointed with muscle from the bottom end of an appendage of the green crab along a belly wall and extracting the syringe needle outwards to form a linear label; and after the fluorescent colloid label is injected, wiping the injected fluorescent colloid label remaining around a position where the syringe needle is inserted.

An feedstuff additive for fattening the cream of river crabs comprises methionine, taurine, L-carnitine, lutein(II), decladding element, VC polyphosphate, seaweed meal, betaine, 50 percent choline chloride, amino acid chelating salt, multi-nutrient for crabs, organic minerals for crabs and puffed corn flour. The weight portion of the components is as follows: 10 to 11 portions of methionine, 15 to 16 portions of taurine, 2 to 3 portions of L-carnitine, 10 to 11 portions of lutein(II), 20 to 21 portions of decladding element, 4 to 5 portions of VC polyphosphate, 25 to 26 portions of seaweed meal, 20 to 21 portions of betaine, 20 to 21 portions of 50 percent choline chloride, 4 to 5 portions of amino acid chelating salt, 8 to 12 portions of multi-nutrient for crabs, 48 to 52 portions of organic minerals for crabs and 180 to 230 portions of puffed corn flour. The feedstuff additive can make the river crabs complete the last decrustation smoothly and enter a fattening stage rapidly. Therefore, the fattening rate of the green crabs at the same level is increased by more than 40 percent; the crabs show fat bodies and full and strong legs; and the proportion of the crabs with red cream can be more than 90 percent.

The invention relates to a pseudosciaena crocea and green crab three-dimensional culture device and method. The pseudosciaena crocea and green crab three-dimensional culture device comprises a floating net and a crab pot. The floating net comprises a floating frame and meshes, wherein the floating frame is a closed polygonal framework, floaters are installed below the floating frame, the floaters are connected to the framework of the floating frame in a strip shape, the meshes are installed surrounding the floating frame in a circle, a container with a top opening is defined by the meshes, and the top opening is matched with the floating frame in shape. The crab pot is placed on the floaters, wherein the side wall of the crab pot is provided with a through hole, and a cover is arranged on the crab pot in a matching mode. The pseudosciaena crocea and green crab three-dimensional culture device and method have the advantages that cage culture of pseudosciaena crocea is realized, and aquatic water is fully utilized at the same time; cage culture of individual green crabs is carried out on an upper layer of a net cage, so that mutual killing of the green crabs is avoided, and the survival rate is up to 95%; besides, bait is fully utilized, the number of waste residues is small, the self-cleaning capacity of the aquatic water is enhanced, balance of the fishery ecological environment is realized, economic benefits are obtained, and the carbon sink function of fishery is also effectively achieved.

The invention discloses a portunus trituberculatus summer green crab cultivation method. The method includes the steps of 1, portunus trituberculatus adult crab cultivation, wherein female young crabs and male young crabs are separately and independently bred till the female crabs reproduce and are unshelled, and adult crabs are cultivated; 2, overwintering breeding, wherein the adult crabs get into an overwintering stage after being cultivated, and the female adult crabs and the male adult crabs continue to be separately bred; 3, mating and sexual gland culture, wherein on April to June of the next year, the water temperature is controlled to range from 18 DEG C to 22 DEG C, the overwintered adult crabs are subjected to mixed breeding according to the ratio of the female adult crabs to the male adult crabs being (1.5-2.5):1, the female adult crabs and the male adult crabs are paired and mated, the mated female crabs are bred at the water temperature of 20-25 DEG C for 30-50 days, the sexual glands of the female crabs fully develop, and the sexual gland index reaches 5% or above. By means of the method, portunus trituberculatus is subjected to female and male separate breeding, it is effectively avoided that the portunus trituberculatus is mated and develops in autumn and winter, the portunus trituberculatus is mated out of season by manually regulating the water temperature, and summer green crabs with fully developing sexual glands can be smoothly cultivated and obtained.

The invention relates to a method for culturing soft-shell green crabs indoors by using a cage. The soft-shell green crabs are cultured by using a pool made from glass or cement or a rectangular plastic bucket or a glass-steel bucket, and water is injected in the pool, bucket or cylinder to reach 30cm. The method comprises the following steps of: catching 50-250g of green crabs which do not finish reproductive molting from a culturing pool or in the field as molting crab seedlings, conveying living bodies of the molting crab seedlings to a molting pool and culturing, respectively putting each crab in a capped plastic cage with 21.5cm length, 15.5cm width and 35cm height or a plastic tank with holes, and then putting the plastic tank with holes or the plastic cage into a culturing pool and culturing, wherein the temperature of pool water is 20-32 DEG C, the salinity is 15-30, the pH value is 7.5-8.8, and the dissolved oxygen is more than 5mg/L; casting baits according to 5-10 percent of crab weight at nightfall or in the early morning everyday; and checking the molting or death situation of the crabs every 2-4h, moving the soft-shell crabs away, temporarily storing the living bodies in low-temperature water body, or quickly freezing and storing the living bodies for sale. The invention has the advantages of mutual green crab killing prevention, high crab survival rate, low soft-shell crab culturing cost, high appendage completion ratio of crabs and high soft-shell crab quality.

The invention relates to a shelter device and a method for an indoor cement pool for temporarily cultivating green crab young crabs. The device comprises a water tube manufactured into a frame-shaped support, wherein a mesh is laid in the frame-shaped support which is hung below a bamboo pole to enable the mesh to be horizontally laid and suspended in water. The method comprises the following steps of manufacturing the water tube into the frame-shaped support, fixedly laying the mesh in the frame-shaped support, placing the bamboo pole above the cement pool, hanging the frame-shaped support below the bamboo pole to enable the mesh to be horizontally laid and suspended in the water, and throwing the green crab young crabs into the cement pool to enable the green crab young crabs to be attached to the mesh and to be distributed stereoscopically. The shelter device and the method for the indoor cement pool for temporarily cultivating the green crab young crabs can guarantee high survivalrate of the young crabs of the green crabs and are simple and convenient to operate.

An External Filtering and Absorbing Device for Use in a Local Containment Area contains filter material with a mesh size not less than 50 microns for removing contaminants from ballast or bilge water from a ship or effluent from a storm drain. Examples of contaminants removed are aquatic nonindigenous species such as Fish, Zebra and Quagga Mussels, Asiatic Clam, Aquatic Weeds, Green Crabs, or other suspended particle contaminants. Filtering is accomplished above the ambient water allowing easy visual verification and visual gratification of the efficacy of the filter unlike closed on-board systems. Water and oil permeate the filter and flow into a local containment area where oil is absorbed by absorbent pads held in pockets. The filter is easily removed and can be sent to authorities to demonstrate compliance with environmental standards. Water sampling containers or instruments used with the assembly allow for further compliance monitoring.

Provided is a mixed aquaculture method. The mixed aquaculture method comprises the following steps of 1 pond preparing including pond structure construction and pond sterilization treatment, wherein in the process of pond structure construction, after a pond is constructed, water in a deep trench is pumped away, the deep trench is exposed to the sun for 3 days to 7 days under sun illumination, seawater is introduced and is 30-50 cm higher than shallow, the PH value of the seawater is detected, and nutritional feed is put; 2 breed stocking, wherein young Chinese forest frogs are laid in the shallow, the young Chinese forest frogs with the size that the weight of one thousand grains is one jin are adopted, young shrimps are stocked in the water, and when the young Chinese forest frogs grow until the weight of 200 grains to 250 grains is one jin, young green crabs are stocked in the deep trench with the density of 10 young green crabs per square meter of the area of the water surface of the deep trench; 3 feeding and managing in the pond, wherein a fungus nutrition solution is put into the water at a fixed period, troughs are arranged in water beside the deep trench at intervals, and feed is put into the troughs.

The invention discloses a live transportation method of green crabs, and relates to the technical field of aquatic product transportation. The method comprises the following steps: (1) carrying out pretreatment before transportation; (2) selecting the means of transport; (3) making a transport vessel; (4) loading; (5) controlling influence factors; (6) carrying out daily management. According to the live transportation method of the green crabs, in the storage and transportation processes of the green crabs, a technical scheme of creating an environment suitable for the survival of the green crabs is provided by strictly controlling the salinity and oxygen content of the water quality besides controlling the low-temperature environment of the green crabs, so that the basic survival requirements of the green crabs are met, and the mechanical injury of the green crabs can be reduced by vibration damping measures in the storage and transportation processes. Compared with the prior art, the method has the remarkable advantages of improving the transport survival rate of the green crabs, reducing the mechanical injury of the green crabs, maintaining the nutrition and mouth feel of the green crabs and prolonging the live transportation time of the green crabs.

The invention provides a breeding method capable of increasing the survival rate of green crabs. The method specifically comprises the steps that a cube-shaped breeding box provided with inner box bodies and an outer box body is selected, the inner box bodies are placed in the single outer box body, and the inner box bodies are arranged in a single layer; the inner box bodies are placed in the outer box body and fixed at the bottom of the outer box body, the outer box body is placed on a sea beach, and a fixing rod is inserted into the beach to fix the outer box body so that the outer box bodycan move up and down on the fixing rod along with rising tide and ebb tide; a box cover of each inner box body is opened, a young green crab is placed in each inner box body, the box covers are fixed, 1-10 green crabs are placed in the outer box body, the green crabs are captured when the weight reaches 300-800 g, the outer box body is moved out, the box covers of the inner box bodies are opened,and the green crabs can be captured and packaged. By means of the breeding method, fighting of the green crabs is avoided, and the survival rate is greatly increased; according to the breeding method, management is convenient, saves the breeding cost and improves benefits.

The invention relates to the technical field of aquaculture, in particular to a high-density breeding method used for a green crab breeding pond. Green crabs are bred in the pond. The method is characterized in that a plurality of earth ridges are arranged in the pond and used for dividing a water area in the pond into continuous circulating water channels; water in the pond directionally and circularly flows in the circulating water channels; oxygenation devices used for filling the bottom of the water with oxygen are arranged in the water channels of the pond and used for providing power for water circulation; the earth ridges are provided with gentle earth ridge inclined surfaces; the slope of each earth ridge inclined surface is not greater than 1/3; aquatic weeds are planted on the earth ridge inclined surfaces. The earth ridges are arranged in the pond, so that the suitable crab breeding area in the pond is enlarged, the crab breeding density in the pond is greatly increased, and the breeding density can be increased by more than three times in comparison with that of a conventional crab pond; the earth ridges are used for dividing the water area in the pond into the continuous water channels, a water body flows, the dissolved oxygen amount is high, and the slope of each earth ridge is small, so that the crabs can be prevented from making holes.

The invention provides a method for raising crabs by rice grass. The method includes the steps of 1), site selection, namely selecting a beach with rice grass growing nearby as a breeding site of green crabs, wherein the breeding site is sufficient in seawater quantity in the area with sufficient light so as to ensure appropriate water temperature; 2), crab house building, namely building a crab house on land at 300-400m from the beach in the step 1), wherein meshes are arranged in the periphery of the crab house so as to ensure that the green crabs does not escape from the crab house; a floating buoy is arranged outside the crab house, a ventilation outlet is arranged in the outer side of the crab house, and ventilation can be achieved; 3), arrangement of culture equipment, namely pumpingseawater to the crab house in the step 2), setting water treatment equipment and a seawater boiler, improving the quality of seawater by the aid of the water treatment equipment and improving the salinity of seawater by using the seawater boiler. The costal natural resources are fully used, feed cost of the green crabs is reduced by the aid of the characteristics of the rice grass, and the benefit in crab raising is increased.

The invention discloses seafood congee with the efficacy of tonifying the spleen and nourishing the stomach. The seafood congee is prepared from, by weight, 19-39% of main materials, 1-19% of secret soup stock, 1-10% of auxiliary materials and 47-67% of rice pulp. The main materials include Yueguang organic rice, green crabs, spotted shrimps, gold abalone slices and laminaria japonica. Compared with the prior art, the seafood congee adopts various food materials for matching and can provide diversified nutrient components for the human body. Moreover, the seafood congee smells delicious, is glutinous and soft in taste and has the healthcare efficacy of tonifying the spleen and nourishing the stomach. A preparation method is simple, and the seafood congee prepared according to the method smells delicious and is glutinous and soft in taste and better in flavor.

The invention relates to a crab pot-based blue crab and green crab winter temporary culture method. Temporary culture is performed based on a blue crab culture pond, and a circular groove is dug in the bottom of the blue crab culture pond 3-6 meters away from the pond wall and serves as an excrement and bait residue gathering place. The winter temporary culture method comprises the following stepsthat S1, blue crabs and green crabs with sound appendages and good vitality are selected; S2, two chela of each blue crab and green crab are firmly bound and are put in a crab pot; and S3, outlets formed in two ends of the crab pot are tightened, the crab pot is put in the extending direction of the circular groove, the first end of the crab pot is put at the bottom of the circular groove, and the second end of the crab pot is fixed to a peripheral platform of the blue crab culture pond for temporary culture. When the temperature is reduced in winter, the blue crabs and green crabs automatically migrate to the deep position of the circular groove. The rising height difference of the circular groove in an original blue crab culture pond and the crab pot from the circular groove to the peripheral platform is utilized. When the temperature is reduced, the blue crabs and green crabs in the crab pot automatically migrate to the deep position of the circular groove, and cold injury or bluecrab freezing death caused by cold waves is avoided. If a water body is lack of oxygen, the blue crabs and green crabs climb to the water surface position to supplement oxygen.

The invention provides a method for promoting spawning of green crabs. The method comprises the following steps: after catching of seed green crabs, banding the seed green crabs with ropes, placing the seed green crabs in a dark and moist room, carrying out dry exposure for 24 hours to 48 hours, and controlling a temperature in a range of 15 to 32 DEG C; after completion of dry exposure, stockingthe seed green crabs into a culture pond, carrying out culturing, wherein the culture pond has a water level of 50 to 60 cm and a seawater salinity of 20 per thousand to 35 per thousand, and stockingmature male green crabs into the culture pond, wherein the stocking density of the male green crabs is 2 to 3 crabs/m2; feeding shellfish every day, wherein the feeding amount of the shellfish accounts for 10% of the total weight of all green crabs in the first week, and is gradually decreased to 2% of the weight of the green crabs after the first week; and after one week, removing ovigerous greencrabs, carrying out dry exposure again for 5 to 10 hours, then carrying out culturing with seawater, subjecting non-ovigerous seed green crabs to dry exposure again for 5 to 10 hours every 3 days, and carrying out repeating for 2 to 4 times. The method provided by the invention selects the seed green crabs with mature gonad, adopts a measure of dry exposure for a plurality of times, promotes spawning of the green crabs, can reach an ovigerous rate of 75% or above, and is applicable to production of marine crabs.