43 results about "Green Crabs" patented technology

A method for cultivating green crabs for two harvests in one year relates to an aquiculture method, which provides a method for cultivating green crabs with two harvests in one year. The first harvest begins to stock spring seedlings from the last ten days of February to the first ten day of March, and harvests in September or October of the same year after cultivating; or the first harvest begins to stock summer seedling in May or June, and harvests in October or November of the same year after cultivating. The second harvest begins to stock autumn seedlings from September to November, and harvests from February to May of the next year after cultivating. The method includes: pool cleaning: cleaning the pool before stocking with one of quicklime and bleaching powder, etc.; water quality: dissolving at least 3mg of oxygen in each L of water with a water temperature of 18 to 25 DEG C, a salinity of 10 to 30, a pH value of 8.0 to 8.5 and a diaphaneity of 20 to 25cm; stocking density: 1000-2000 / mu for the spring or summer seedlings and 3000-5000 / mu for the autumn seedlings; the baits are fresh baits of small and miscellaneous fish and shrimp and low cost shellfish, etc., and are grounded twice a day in the morning or in the afternoon.

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.

The invention discloses a method for breeding red green crabs in a pond. On-line monitoring of pond water dissolved oxygen amount is started in 30-60 days before the red green crabs come into the market, a critical value is set, and when the pond water dissolved oxygen amount is lower than the critical value, an aerator is started to ensure that the pond water resolved oxygen amount is higher than the critical value. The critical value is 3.5mg / L to 4.5mg / L. Food containing astaxanthin is fed to the red green crabs in 30-60 days before the red green crabs come into the market, and each crab is made to intake more than 11.5g of astaxanthin. By means of the method, sufficient dissolved oxygen in the crab pond can be guaranteed, negative effects on astaxanthin deposition from changes of environmental factors are weakened, the organoleptic quality and the taste of the crabs in ponds can be improved, and therefore economical benefits of breeding crabs in the pond are increased. The method is simple in operation, easy to implement and low in cost.

The invention discloses a method for artificial feeding soft shell green crab, which includes self-making glass tank, setting bamboo sheets on the bottom, separating glass tank to several small regions by sheet glass; pooling aquaculture water into the glass tank after it is sterilized thoroughly, keeping the height of water level on 50cm, clear water, 15 per mill salinity, keeping water temperature on 15 DEG C, pH 7.6; selecting green crab which has hulled for 10 times and will be appeared on the market, putting 2 green crabs into small regions of every glass tank; keepin g dissolved oxygen over 5ml / L in the aquaculture water; hulling to soft shell green crab for culturing 5 days. The artificial feeding soft shell green crab of the invention can improve the bottom ecology of the glass tank, favor the survival rate in the process of green crab hulling, decrease occurrence of disease; materials with chemical constituents are not added in the period of culture, green crab has plump meat without any toxin and nutrition added valve is higher; the body weight of green crab can increase about 41% after hulling, and keeps the time of soft shell of green crab for 7days.

The invention provides a green crab aquaculture system, which belongs to the technical field of aquaculture, and solves the technical problems of low survival rate of green crabs and the like of the existing green crab aquaculture system. The green crab aquaculture system comprises a seawater purification device, a seawater heating device and a sewage treatment unit, wherein the seawater purification device is communicated with the seawater heating device, the aquaculture system further comprises a box bracket, a plurality of aquaculture boxes which can accommodate at least one green crab are arranged on the box bracket, water inlets and water outlets are arranged on the aquaculture boxes, the water inlets are connected with the seawater heating device through water inlet pipelines, the water outlets are communicated with the sewage treatment unit through drainage pipelines, and crab taking ports are arranged on the aquaculture boxes. The invention has the advantages of high survival rate of the green crabs, high aquaculture efficiency, high utilization rate of aquaculture facilities, obvious aquaculture benefit, convenience in monitoring and the like.

The invention discloses a mangrove forest crab co-culture ecological cultivation device. The mangrove forest crab co-culture ecological cultivation device comprises a pond bottom layer, pond embankments are arranged on the two sides of the pond bottom layer, a plurality of nursery stock foundation beds are arranged on the pond bottom layer, auxiliary ditches are formed between every two adjacent nursery stock foundation beds, main ditches are formed between the nursery stock foundation beds located on the two sides and the pond embankments, and water inlets and outlets are formed in the positions, close to one sides, of inner cavities of the pond embankments. According to the mangrove forest crab co-culture ecological cultivation device, a circulating water system is constructed in the mangrove nursery stock cultivation space of the pond suitable for forestation to breed blue crabs by utilizing the benthic living habit of the blue crabs in mangrove forest wetland mud flat and the caving defense characteristic, and the nursery stock spacing and root systems are used as a place for inhabiting and caving the blue crabs, so that the green crabs can be cultivated in the mangrove nursery stock cultivation space of the pond suitable for forestation; the activity space of the blue crabs is increased, the defense capability is improved, and the killing of individual competitive feeding and inhabiting space competition is reduced; and meanwhile, the predation of water birds can be reduced, meanwhile, eutrophication bottom mud and breeding tail water caused by material input in the blue crab breeding period provide nutrition for nursery stock growth, and a mangrove nursery stock production and blue crab breeding co-culture ecological breeding system is formed.

The invention provides a method suitable for evaluating the quality of the soft-shell crab, the mud crab, wherein the standard is to use the TOS score to judge the quality of the soft-shell crab, the mud crab to be tested. The method for identifying the quality of soft-shell crabs of Scylla pseudocavena according to the present invention is based on the collection of many different grades of soft-shell crabs of Scylla pseudocavena soft-shell crabs, through the calculation of the time after molting and the determination of moisture, gray matter, amino acids, minerals in the hepatopancreas A method for identifying the quality of soft shell crabs established after the analysis of the relative content of material elements, fatty acids, and volatile aroma compounds. There are few human factors in the identification process.

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 binding device for Sanmen green crabs and a method. The binding device comprises a platform, a sliding groove formed in the upper surface of the platform, a conveying mechanism close to the platform, a Sanmen green crab limiting mechanism arranged above the conveying mechanism, and a plurality of packaging bodies which are sequentially connected. The packaging bodies comprises U-shaped shells, left air bags which are arranged on the inner surfaces of the U-shaped shells and right air bags which are arranged on the inner surfaces of the U-shaped shells, wherein upper baffles and lower baffles are separately arranged at the upper ends and the lower ends of the U-shaped shells, a plurality of air holes are formed in the upper baffles; air inlet nozzles of the left air bags and the right air bags extend out of the side walls of the U-shaped shells; and the air inlet nozzles are provided with one-way valves. The binding device further comprises an air pipe and a controller. The air pipe is further provided with an air pump and an exhaust nozzle matched with an air inlet; and the controller is separately electrically connected with the air pump, the conveying mechanism and the Sanmen green crab limiting mechanism. The binding device for the Sanmen green crabs has the characteristics of simple operation, good safety, high production efficiency and low production cost for binding the crabs

The invention discloses a method for artificial feeding soft shell green crab, which includes self-making glass tank, setting bamboo sheets on the bottom, separating glass tank to several small regions by sheet glass; pooling aquaculture water into the glass tank after it is sterilized thoroughly, keeping the height of water level on 50cm, clear water, 15 per mill salinity, keeping water temperature on 15 DEG C, pH 7.6; selecting green crab which has hulled for 10 times and will be appeared on the market, putting 2 green crabs into small regions of every glass tank; keepin g dissolved oxygen over 5ml / L in the aquaculture water; hulling to soft shell green crab for culturing 5 days. The artificial feeding soft shell green crab of the invention can improve the bottom ecology of the glass tank, favor the survival rate in the process of green crab hulling, decrease occurrence of disease; materials with chemical constituents are not added in the period of culture, green crab has plump meatwithout any toxin and nutrition added valve is higher; the body weight of green crab can increase about 41% after hulling, and keeps the time of soft shell of green crab for 7days.