71 results about "Fish stock" patented technology

A fish allogenous frozen-sperm induced gynogenesis method comprises a frozen storage method of the allogenous fish sperm, a genetic inactivation method, an induced method for the gynogenesis diploid fry and an identification method for the gynogenesis fry. The present invention establishes the method adopting the frozen-sperm of the sea bass to induce the egg gynogenesis of a plurality of sea fishes for the first time, which selects the cold-shock starting time, cold-shock temperature and the cold-shock durance time that are separately suitable for fish eggs of the strip-spotted flounder, the turbot and the canine-tooth paralichthys olivaceus to establish a micro-satellite marking identification method of the gynogenesis fry. The percentage rate adopting the present invention to acquire the gynogenesis fry of the strip-spotted flounder, the turbot and the canine-tooth paralichthys olivaceus is 7.8 percentages to 40.7 percentages, 26 percentages to 34 percentages and 10 percentages to 25 percentages respectively. The established method of the present invention is characterized in advancing, high efficiency, accuracy and reliability, which has an important application value in fish gender controlling and the production of the all-female fries and has a broad popularization and application prospect on fish cultivation and fish breeding.

A method of gathering, analyzing, and reporting data about commercial fish stocks and fisheries. Under this method, individual commercial fishermen use a device specific to the type of fishing being done to record the number of fish brought aboard, the number kept or released, the reason for release, the date, time, and location of the catch, and the fishery conditions, such as water temperature, depth, and salinity at the time that fish are brought aboard the fishing vessel. The individual fishermen transfer the data, typically via telephone link, to a central data repository, or to a receiving station when the data is transferred to the central data repository at a later time. The data is encrypted during transfer and placed in fisherman files, each fisherman having his own, restricted-access file. Data from all individual fishermen, as well as from other sources, are placed in a composite data pool to be used as source data for a general fishery database on fishstocks and fisheries. This data can be stripped of data that would identify a particular fisherman as the source, to preserve fishing secrets. Confidential reports can be generated from a fisherman file and delivered to the individual fisherman who is the source of that data. Reports for regulatory agencies can also be generated from the data in the fisherman file. The fishery database provides a unit for regulatory agencies, fisheries managers, and fish research institutions to analyze, monitor, and report on the development of fishstocks and fisheries.

The invention discloses an artificial breeding method for siganus oramin. Siganus canaliculatus and Siganus fuscesens are common fish stocks of Siganus, the physiological characters, reproductive habits and the breeding methods of the Siganus canaliculatus and Sigauns fuscesens are more similar, the problems that the source and domestication are difficult, newly hatched individuals are small in body size, the death rate caused by strong irritability of larva is high, a systematic artificial breeding technique is in shortage, the breeding offspring seeds are mainly from natural seedlings captured from ocean, and the like exist in the artificial breeding process. The artificial breeding method adopts the technical measures of parent fish culturing, cultivation, artificial spawning and incubation, larva cultivation pool preparation, cultivation water quality conditioning, staged bait feeding and juvenile fish transportation, so that the industrialization production of parent fish supply and seedling culture is realized, and the technical problems of artificial spawning and incubation of parent fish, selection and enrichment of larvae bait, water quality regulation and control, larva transportation and the like in the artificial breeding process of Siganus canaliculatus and Siganus fuscesens are systemically solved. The spawning rate of the cultivated parent fish can reach more than 65 percent, the average spawning fertility rate can reach more than 85 percent, and the survival rate of artificial breeding is 10.7 percent-27 percent.

The invention provides a real-time fish stock monitoring and fish amount estimating system based on a wireless communication network, which mainly comprises an underwater acoustic transducer, a fish finder processor and a micro-processing unit, wherein the micro-processing unit detects echo reflection signals of a fish stock and extracts an average value of the rear echo reflection strength within a period of time in a specific water depth range; and fish stock mapping information in an echo reflection mapping graph formed by echo signals is extracted, and remote transmission and display of fish stock information are realized. The system can also be used for predicating the fishing yield besides displaying fish finder images in real time. The system provided by the invention can be applied to a plurality of fields such as real-time monitoring for fixed net fishery and the sea net cage breeding industry, observation of artificial reef fish-gathering effects, fish stock detection under an artificial fish-gathering device in tuna seine purse fishery and the like, and has very important significance for improving the production efficiency of marine fishery.

The invention relates to the technical field of sonic wave fish driving and aims to provide an underwater net cage multi-beam fish driving monitoring system and an underwater net cage multi-beam fish driving monitoring method. The monitoring system comprises an underwater net cage, an underwater monitoring device and a data processing device, wherein the underwater monitoring device comprises a phased array transducer array and a high-frequency sonic wave oscillation circuit, which are arranged outside of the net cage; the data processing device comprises a data processing module, a first wireless transmission module, a computer control center and a second wireless transmission module, wherein the data processing module and the first wireless transmission module are distributed around the net cage, the computer control center is placed on a bank and the second wireless transmission module is connected with the computer control center; and the phased array transducer array and the high-frequency sonic wave oscillation circuit are both connected with the data processing module, and the data processing module, the first wireless transmission module, the second wireless transmission module and the computer control center are connected in sequence. The system and the method can determine the accurate position of the breakage of a net and can effectively prevent the fish stock for escaping from the net.

The invention discloses a culture method of barbus capito. The method comprises the following steps that barbus capito in rivers, lakes, reservoirs and other natural water is selected, or artificially cultured adult barbus capito is selected as parent fishes; a culture pond, the parent fish stocking number, the stocking mode and the culture and feeding mode are selected, and management is enhanced; the parent fishes are subjected to artificial spawning induction; artificial fertilization is carried out; artificial incubation is carried out; fry rearing is carried out; fingerling culture is carried out. Culture and screening of the parent fishes, the odinagogue variety, the concentration ratio, the injection mode, incubation conditions and other conditions are optimized, and the spawning induction rate, fertilization rate and incubation rate of the cultured barbus capito all reach 90% or above.

The invention discloses a salvage treatment device for dead fish. The hull is provided with a pulverizer, and the pulverizer is provided with a feed port and a discharge port. There is a collection box, a joystick is set on the control box, a motor is set on one side of the control box, the motor is connected with a universal converter, and the universal converter is connected with one end of the telescopic folding link, and the telescopic folding link is The other end is connected to the net hoop, one end of the telescopic folding connecting rod is equipped with a water quality detector, the net hoop is equipped with a fishing net, the bottom of the hull is embedded with a disinfectant electromagnetic spray head, and one end of the disinfectant electromagnetic spray head is connected to a disinfectant. Agent box, this kind of device can salvage the dead fish on the ocean, avoid the dead fish from polluting the ocean or causing other fish to be affected by diseases, and then crush them, which can be used as fish feed, and can also be used as fish feed. An area with a lot of dead fish will be detected and then dealt with in time.

The invention discloses a fishing capsule containing a fish luring agent and a processing method of the fishing capsule. A capsule shell capable of being rapidly disintegrated in water is formed by sleeving a left capsule shell and a right capsule shell. A strip-shaped notch is axially formed in the open end of the upper end of the right capsule shell. Multiple through holes are formed in the capsule shell. The capsule shell is prepared from, by weight, 4-8 parts of sodium carboxymethyl starch, 90-95 parts of ground calcium carbonate, 1-3 parts of musk powder, a proper amount of effervescent disintegrant and a proper amount of color master batch. The effervescent disintegrant is a mixture prepared from sodium bicarbonate and citric acid. The components are weighed according to weight parts and mixed and stirred to be uniform, clear water is added, the mixture is stirred and dissolved evenly, and the capsule shell is prepared. The situation that people are hurt by fishing hooks and bait disengages can be avoided, and the fishing capsule can be rapidly disintegrated in the water and achieves an obvious food calling function on fish stocks. The invention further provides a method for processing the capsule shell with the functions.

The invention discloses a high-yield freshwater fish culture method. The culture method comprises the steps of pond cleaning and disinfection of a culture pond, preparation before fish stocking, fry prelibation, fry stocking, feeding, pest control and prevention, water quality control and humidity fishing. According to the high-yield freshwater fish culture method, through the reasonable disinfection of the culture pond and the reasonable fertilization and water injection before fish stocking, the method provides an ecological environment with a safe and stable earlier stage for fry, so that the culture method is green and environmental protection, the intensification is higher, the fish production is greatly increased, the fish with different feeding habits is fed with the collocation of plankton and fodder without antibiotic, the pollution is less, the safety is high, and through the pest management, the water quality management and the modest fishing, the healthy growth and the delicious meat quality of the freshwater fish can be guaranteed effectively.

The invention discloses a system for sorting fishes passing a fish way and relates to the field of fish way engineering. The system comprises a sorting chamber, a sorting tank, a releasing tank, a restoring pond and a discharge pipe, the sorting chamber is arranged above an observing chamber, the sorting tank is respectively connected with a lifting gate chamber and the restoring pond, a sorting tank inlet gate is arranged at a junction of the sorting tank and the lifting gate chamber, a sorting tank outlet gate is arranged at a junction of the sorting tank and the restoring pond, and a sorting platform is arranged on one side of the sorting tank; the releasing tank and the sorting tank are parallelly arranged side by side, one end of the releasing tank is communicated with the restoring pond, and two ends of the discharging pipe are respectively communicated with the restoring pond and a fish way body. The system overcomes the defects that the prior art is unsupportive of sorting or low in sorting efficiency, a fishing net is prone to causing damage to fishes in the process of fishing and analyzing, dehydration operation is prone to causing fish death, the fishes need to be moved out of the fish way after fish collection for sorting, identifying and measuring, and the lifting process is time-consuming and labor-consuming. The invention further discloses a method for sorting the fishes passing the fish way.

The invention relates to a device for collecting fish eggs and juvenile fish. The device comprises a fish collecting barrel and a conical net connected with the fish collecting barrel, wherein a cylindrical double-layer barrel in the fish collecting barrel is composed of an upper barrel section, a middle barrel section and a lower barrel section; the middle barrel section is composed of a plurality of connecting rods which are uniformly distributed along the periphery of the barrel; the upper barrel section and the lower barrel section are connected through the connecting rods; a bottom cover is hinged with the bottom end of the lower barrel section; a net fastener is sleeved on the upper barrel section; a circular steel ring is arranged at a large opening of a conical silk gauze in the conical net. The device for collecting fish eggs and juvenile fish, provided by the invention, can solve the problems that the conical net is separated from the fish collecting barrel, the eggs, juvenile fish and rubbish are clamped, the floating rubbish enters into the net, and the like; the efficiency and accuracy of investigation work can be increased; the maintenance and manufacturing cost can be reduced.

The invention discloses a fishing device and method for fish stock at the medium and deep sea bottom. The fishing device comprises an elastic ring, a dragnet arranged on the elastic ring, a pluralityof floats arranged on the upper side of the elastic ring, a plurality of counter weights on the lower side of the elastic ring, two supporting rods arranged on the elastic ring, and a flexible shaft arranged on the two supporting rods. One end of the flexible shaft is connected with one supporting rod rotationally, the other end of the flexible shaft is connected with a rotation shaft of a motor arranged on the other supporting rod, a plurality of bell-mouth water inlets are arranged on the flexible shaft, each bell-mouth water inlet is connected with an L-shaped drain pipe, the L-shaped drainpipes are all connected with the flexible shaft perpendicularly, and the central line of each bell-mouth water inlet is perpendicular to the lower portion of the corresponding L-shaped drain pipe. The fishing device and method has the advantages of guaranteeing fishing efficiency and reducing production cost by automatically regulating size of the opening of the dragnet according to density of fish and shipping speed.

The invention provides a culture method of perches adopting a sea net cage. The culture method comprises following steps of: step 1), keeping the salinity of culture water in a range between 3 per thousand and 30 per thousand and culturing kelp, asparagus or porphyra yezoensis in the sea net cage in culture water; step 2), employing a 5-inch sieve to screen fish stocks of perches, immersing perch fingerlings for a bath by adoption of a 3% saline solution for disinfection and putting perch fingerlings to the sea net cage with the certain stocking density; step 3), feeding perch fingerlings with artemia larvae in a time range from the second day to the sixth day of feeding and then feeding perch fingerlings with artemia larvae combining fry feeds on the seventh day of feeding; step 4), feeding with juvenile fish feedstuff when perch fingerlings grow at 8 to 12 cm; step5), catching perch fingerlings when perch fingerlings grow at 25 to 45 cm. The culture method of perches adopting the sea net cage has following beneficial effects: based on growth characteristics of perches, a culture method adopting the sea net cage suitable for growth of perches is provided and capable of significantly shortening culture period of perches; and cultured perches have advantages of high protein content and tender meat.

Methods for the production of reproductively sterile fish and aquatic animals for aquaculture, the aquarium trade, and control of invasive species are described. The methods include disruption of gonadal development through the administration of compounds that lead to the failure of fertile gonadal development. Compounds may be delivered to the eggs prior to fertilization or water activation or post fertilization and water activation by contacting unfertilized or pre-water-activated fertilized eggs or fertilized eggs in an immersion medium including the compound of interest. Compounds may be conjugated with a molecular transporter compound effective for chorionic transport of the conjugate. The compounds may be antisense Morpholino oligomers that are cap able of effectively suppressing the expression of the dead end gene or other essential genes for germ cell development in fish and other egg-producing aquatic animals.

The invention provides a fish breeding method which comprises the following steps: a. construction of a pool; b. pre-preparation for fish stocking; c. fry preprocessing; d. feeding with feed; e. waterquality management; and f. fishing appropriately. The fish breeding method can timely clear away rubbish and waste residues in the pool to keep a good pool environment, and the feed nutrition arrangement is reasonable, so that the immunocompetence of fish can be effectively improved, meat quality can be improvd, and yield can be increased.

Fish sexual characteristics are determined by measuring the concentration in fish serum, plasma or whole blood of one or more peptide hormones of the transforming growth factor-beta superfamily (TGF-β superfamily). The disclosed method and an accompanying field test kit may be used in sturgeon aquaculture to cull out young male fish so that increased time and resources may be devoted to the further rearing of female fish for caviar production. The method and test kit may also be used for wild fish life history studies.

The invention discloses an additive for improving cultured fish meat quality, a use method, application and fish feed. The additive for improving the cultured fish meat quality comprises the following components by weight: 0.00004-0.0002 part of thiamine, 0.8-2.0 parts of valine, 0.37-0.98 part of histidine, and 0.0008-0.0027 part of manganese. By adding the additive in the range, the fish muscle water-holding capacity, chewiness and pH can be enhanced, the sensory quality of fish can be improved, and at the same time, fish growth can be promoted, and the feed efficiency can be improved. The additive has the advantages of convenient use, low cost, no toxicity and safety, etc.