128 results about "Fish resources" patented technology

The invention discloses a seine object fish shoal tracking method based on horizontal fishgraph images. Through obtaining echo signals of a fishgraph, a seine object fish shoal is tracked, a movement locus is predetermined, and thus the success rate of seine fishing is improved. According to the invention, through adjusting the inclination angle of a sonar, changing the emission direction of sound waves and performing 360-degree rotation, underwater three-dimensional space can be scanned, three-dimensional images are drafted, the quantity of fish shoals is estimated in a stereo mode, and effective help is provided for development of fish resources.

The invention discloses a Yangtze River endemic fish oviposition habitat monitoring method and system based on the Internet of things. The method comprises the steps of performing optimized arrangement of a sensor assembly within a Yangtze River endemic fish breeding inhabitation range, collecting water environment information and fish behavior information of the Yangtze River endemic fish breeding inhabitation range in real time, utilizing a technology of the Internet of things to transmit the collected information to a monitoring control center, enabling the control center to evaluate the monitored water environment in real time by combination with a endemic fish oviposition habitat evaluation model, sending ecologic early warning to a dam dispatching center when the habitat water environment exceeds a fish fitness value, and enabling the dispatching center to adjust a dam running mode timely according to early warning signals so as to improve the oviposition habitat fitness value and protect endemic fish resources. The system comprises a data collecting system, a data transmission system and a data processing system. Automatic positioning, automatic monitoring record and wireless network technologies are adopted, and the goal of real-time monitoring and analysis of the habitat water environment is achieved.

The invention relates to a conjoint analysis method for estimating the DNA abundance of fishes based on an environment DNA technology. The conjoint analysis method includes the steps that the total DNA abundance of the fishes is acquired through timed and quantified PCR; the species composition proportion of the fishes is acquired through 454 GS-FLX Titanium sequencing analysis; conjoint analysis of target species is performed through sequencing data and timed and quantified PCR data; a relative distribution diagram of mitochondrial DNA of the fishes in an environment is drawn through sufer 8.0 software. Based on the environment DNA identification technology, weather species exist and how many species exist can be analyzed just by collecting water samples without depending on fish species capturing, a sampling method is simple, and fish resources can be protected to the maximum degree; meanwhile, for some species which are rarely distributed and difficult to capture, the method is still more effective than traditional fishing investigation, the method can effectively solve the problem that effective species specificity primers are difficult to obtain when multiple closely related species exist in samples, and NDA abundance information of all species can be known just by conducting experiment once respectively through the two technologies.

A method for preparing a low molecular weight fish peptide through a Bacillus natto fermentation method comprises the following steps: taking fish to mince, adding water, adding maltose, glucose, lactose or sucrose to obtain a mixture; adjusting the pH value of the mixture, sterilizing at high temperature; cooling, inoculating Bacillus natto seed liquor to ferment; and centrifuging fermentation liquor, filtering, concentrating, drying and grinding to obtain a low molecular weight fish peptide product. The method uses fish as the raw material and utilizes the Bacillus natto fermentation technology to obtain the low molecular weight fish peptide. The product in the invention is very soluble in water, is digested and absorbed easily by human body and has various functions of reducing cholesterol in the blood, promoting lipid metabolism, preventing and curing hypertension and the like. The technology in the invention is also suitable for other low value aquatic product and high-grade aquatic product machine leftover pieces, thus fish resources can be fully utilized; and the technology is simple and easy, the investment is less, the cost is low, the effect can be realized fast, the added value is high and the method is suitable for large-scale industrial production.

The present invention discloses a method for preparing tuna skin gelatin, belonging to the technical field of fish resources utilization. According to the invention, skin tuna skin is subjected to pretreatment, degreasing, acid and alkali treatment, and then is subjected to gelatin extraction, and deodorization by filtering through activated carbon, and ion-exchange purification to remove heavy metal ions, and then concentration under vacuum and spray-drying to obtain finished products of tuna skin gelatin with quality meeting the edible gelatin standards specified in national standards. The tuna skin gelatin of the invention can be further processed for use and can be used in medicine, food and cosmetic industries, achieving the purposes of turning waste into treasure, and comprehensively and efficiently developing high value-added tuna by-products. The method of the invention has advantages of: 1, a scientific and reasonable process is adopted, the temperature in the reaction process is low and easy to control, which saves energy and controls the molecular weight of the skin gelatin in a relatively narrow range, and the quality of obtained gelatin is high; and 2, activated carbon is used for filtering for deodorization, improving the taste of the product.

The invention discloses a river ecological flow process derivation method for fish habitat protection, and the method specifically comprises the steps: carrying out the investigation of the current situation of fish resources in a research region, and determining a target fish obtained through the ecological flow derivation; the method comprises the following steps: carrying out targeted survey ontarget fishes, carrying out a laboratory stress experiment, screening key water environment factors, and establishing a quantitative response relationship between different life stages of the targetfishes and the key environment factors by utilizing data obtained by the laboratory and field survey; Basic data of hydrology, water quality, topography, meteorology and the like of a research area are collected, a fish habitat model is established by adopting a fuzzy mathematics principle and is coupled with a water environment model, a fish habitat evaluation system is established, and a dynamicresponse relation between the habitat and flow is obtained; and determining a reference system for river ecological flow process calculation, comprehensively considering habitat demands of target fishes at different life stages and seasonal changes of natural runoff, and deducing a complete hydrological annual ecological flow process of the river. Constraint conditions can be provided for reservoir-oriented eco-friendly scheduling, and a practical and reliable basis is provided for drainage basin water resource distribution and management.

A method for controlling the gate based on the habitat requirement for fish overwintering in rivers. According to the characteristics of biological habitat of the river and the habitat demand of fishes during overwintering, the method specifically comprises the steps of: firstly, determining candidate fishes for ecological flow calculation though fish resources investigating and historical data, and then screening out the target fish by adopting hierarchical analysis method; Secondly, establishing a quantitative response relationship curve between target fish physiological adaptions and water temperature, obtaining ecological water level which ensures the target fish overwintering safely according to the vertical temperature distribution, and establishing the relation between water depth and discharge using hydrodynamic model; finally, setting up a gate control system including a radar water level meter in the overwintering areas and an ecological water level management system in a gate control room.

The invention provides a preparation method of fish-skin collagen for a medical biomaterial. The preparation method provided by the invention comprises steps of raw material treatment, collagen extraction, extract purification and the like. By the adoption of the preparation method of fish-skin collagen for a medical biomaterial, non-collagen components of fish-skin can be fully and effectively removed; high-purity collagen with the content of obtained hydroxyproline being greater than or equals to 9%, the content of non-collagen being less than or equals to 1% and the content of ash being less than or equals to 1% is obtained; and fish resources can be utilized within a larger range. The preparation method has advantages of simple technology, easy operation, short processing time and obvious biocompatibility effect, and is suitable for industrial production.

The invention discloses a fishing system based on network video remote control and a method breaking through the defects in a traditional mode for realizing the fishing under the condition that people are not at the scene. The fishing system comprises a customer display terminal, a customer management center, a cabled and wireless network system, a local area network management station, a fishing operation remote control system, a power supply and a video sound collecting transmission system. During the operation, a remote control cloud deck power supply is started, a fishing rod can remotely control the cloud deck to realize the horizontal rotation and the vertical displacement, one end of a fishing data wire assembly is fixed on the fishing rod, the other end of the fishing data wire assembly is provided with a fishing hook assembly and an underwater illumination and video sound collecting playing assembly, the fishing hook adopts a remote control bait hanging assembly for hanging bait, a buoy adopts a space bean for realizing the position limitation, the displacement of the space bean is realized through a space bean displacement assembly, and the harvested fish is contained into an antitheft fish basket assembly. The invention provides action games really combining the virtuality and the reality, requirements of fishermen with the fishing desire but without the in-site fishing time can be greatly met, the fishermen can realize the remote control fishing by a computer through sitting at home, the wild fish resource development benefits are improved through adopting a mode of fishing large fish and breeding fish fry, and the sustainable development of fish resources is promoted.

The invention relates to a monitoring method for natural reproduction of fish based on environmental DNA technology. The method comprises the following steps: acquisition of a water sample; DNA extraction; ddPCR amplification of a target fragment; and concentration analysis. The monitoring method provided by the invention is based on environmental DNA identification technology, does not depend on traditional fishing technology for roe and fries and traditional anatomical technology for oophagous fish and can determine the oviposition behavior of a target species and the position of an oviposition site only through reasonable design of a sampling point, acquisition of a water sample and concentration analysis of the target species. The method maximally protects fish resources and avoids inconvenience caused by restrictive factors like long time for traditional fishing and difficulty in fishing of a part of fish fingerlings.

The invention discloses a boat-type solar fish-farming net cage in river, comprising a flow rate regulation device. The flow rate regulation device comprises a flow rate measurement cabin, the inner of the flow rate measurement cabin is provided with a tension spring, a flow rate measurement board, a draw bar, and a plurality of regulation pieces for controlling the opening and closing of the flow rate measurement cabin. One end of the tension spring is fixed on the flow rate measurement cabin, and the other end is connected with the draw bar. The draw bar passes through a draw bar sleeve arranged on the flow rate measurement cabin and is fixedly connected with the flow rate measurement board, and the regulation pieces are arranged on the flow rate measurement cabin in revolving and are movably connected with the draw bar. The net cage of the invention is free of the limitation of the power supply, achieves the illumination, the insect killing and automatic feed of bait by using the solar energy. The net cage can automatically control the flow entering the net cage and ensure the reasonable flow-resisting capability of the fishes in the fish-farming, and is suitable for the normal growth of the fishes. In addition, the net cage can kill the injurious insects when illuminating, thereby protecting the wild fish resources in the rivers and developing the farming production of the wild fishes.

The invention relates to a method for artificial domestication and cultivation of semilabeo notabilis. The method comprises the steps of 1, building a semilabeo notabilis cultivation pond; 2, collecting and selecting parent fish fry; 3, conducting food habit conversion; 4, conducting artificial domestication of fry; 5, observing gonad development; 6, conducting domestication management. By the adoption of the method, massive cultivation and population continuation of semilabeo notabilis are facilitated, native commercial fish aquaculture and new species are added, ecological balance of a water area is maintained, local native fish resources are protected, population quantity is increased, biodiversity and ecological balance are maintained, and conditions are provided for semilabeo notabilis cultivation and considerable economic benefits are obtained by means of the natural resources in the Dabang river drainage basin.

The invention discloses a fish way design method. The fish way design method comprises the steps of: step 1, collecting data; step 2, determining a fish passing target object; step 3, determining a fish passing scheme; step 4, establishing a dam front section hydrodynamic model and simulating a flow field; step 5, fish way overall design; and step 6, determining an optimal separation board distance. According to the invention, the fish passing target and the fish passing scheme are determined according to the fish resource current situation, the water environment current situation investigation is performed, and the hydrology and water quality conditions of the research area are analyzed. After the current situation analysis is completed, a flow field of a river channel at a dam site is simulated by utilizing an EFDC model, an appropriate living flow velocity range of local fishes is determined, preliminary design of the fish passing channel is performed, and flow field conditions of the fish passing channel under different design schemes are simulated. Simulation results of the fish passing channel flow field are analyzed and compared under different design schemes, and an optimalfish passing channel scheme is determined by combining the simulation results of the river channel flow field in the research area. The overall design of the fish passing channel is completed, and adaptive design and management are implemented.

The invention belongs to the technical field of aquaculture, in particular to an ultralow-temperature preservation method of rachycentron canadum spermia, comprising the following steps of: diluting and uniformly mixing the collected fresh seminal fluid and spemium preserving fluid step by step according to the volume ratio of 1:3 within 20 seconds, placing the mixture on the liquid level of liquid nitrogen for precooling for 5 minutes at the precooling temperature of 70 DEG C below zero to80 DEG C below zero, and then placing the mixture in the liquid nitrogen with 196 DEG C below zero for long-time preservation. When in use, the preserved spermia are unfrozen at the temperature of 37 to 40 DEG C for 3 to 4 seconds, are immigrated into a spermium activating fluid for activation and then are inseminated. The ultralow-temperature preservation method of the rachycentron canadum spermia in the invention contributes to enhancing the utilization rate of the rachycentron canadum spermia so as to increase the fingerling breeding quantity and enhance the economic benefits. The technology can be used for the artificial breeding of fish, and also has the important significance on developing the recovery and reestablishment of fish resources.

The invention discloses a system for observing and collecting migratory fishes in a fish way. The system comprises an observing system and a collecting system, the observing system is arranged beside or in a fish way body, and the collecting system is arranged beside the observing system. The system overcomes the defect that an observing chamber directly arranged on the side wall of the fish way is only supportive of observing and counting and cannot collect fishes or is small in collection quantity and low in efficiency and the defect of influence on normal fish passing of the fish way due to proneness to fish death caused by the fact that several times of fishing are needed for complete counting in the prior art. The system has observing, monitoring, counting and sampling functions, and is free of influence on normal running of the fish way, high in fish collecting efficiency, little in damage to fishes and free of influence on fish resources and supportive of cleaning and maintaining a glass window of the observing chamber by opening and closing different gates to adjust flowing direction of water. The invention further discloses a method for observing and collecting the migratory fishes in the fish way.

Fish milk is milk-like matter comprising fish slurry 10-85 wt%, cow milk 10-85 wt%, emulsifier 1-5 wt%, destinking agent 0.1-5 wt% and corrective 0.1-5 wt%. The fish slurry is prepared with fish without gall bladder and water and through coarse milling and fine milling and fish accounts for 12.5 wt% of the material. The production process includes making fish slurry, blending, emulsifying, correcting taste, instantaneous heating to sterilize, heating and pressurizing to homogenize and packing. Compared with available cow milk, the fish milk has higher calcium and protein content, EPA and DHA content higher than 7 %, similar taste and storage period at normal temperature over 6 months. The present invention makes it possible to utilize fish resource and fish nutrients fully.

The invention discloses a steamed fish belly product with rice flours and preparation method thereof. The steamed fish belly product with rice flours, which is delicious in taste and fat but not greasy, is obtained by preparing fish bellies, preparing seasonings, preparing flours and packaging the product and is edible only through being simply boiled. The steamed fish belly product with rice flours, disclosed by the invention, has the advantages of rich raw material source, convenience in processing, easiness for realizing industrialization and contribution to deep development to sufficiently utilize fish resources and increase additional values of fish products; meanwhile, the gaps of the steamed fish products with rice flours in the market are also filled.

The invention discloses a reservoir fish resource acoustics investigation method. The method comprises the steps that (1), multi-mesh combination gill nets are designed; (2), the length of cruising paths is designed; (3), the cruising paths are designed; (4), net points are designed and laid, water surface sub-areas are designed, and the multi-mesh combination gill nets are laid in all the sub-areas; (5), underwater acoustics data are collected, and acoustics evaluation data of a reservoir fish resource are obtained; (6), fish samples are collected, the multi-mesh combination gill nets are laid in all the sub-areas before the sun sets, and statistics is carried out on the species, the body length, the body mass, the quantity and the proportion of catches in all the sub-areas; (7), the reservoir fish resource is evaluated comprehensively, and the underwater acoustics evaluation data and fish sample data are combined for obtaining a result of the reservoir fish resource. The effects of path planning and fish sample collecting in the acoustics investigation of the reservoir fish resource are achieved; the reliable basis is provided for reasonable utilization and management of the reservoir fish resource, and the condition of the reservoir fish resource is evaluated efficiently and fast.

The invention discloses a multi-scale underwater fish school detection method based on an attention module, and belongs to the technical field of marine fish resource detection. Firstly, underwater fish school images are obtained, fish school images are selected from the underwater fish school images, enhancement preprocessing is conducted on the underwater images according to the characteristics that the underwater environment is dark, the background is complex and the fish school images are small and dense, based on an optimized YOLO V4 detection framework, an ECA attention mechanism is added to enable a network to focus on fish body feature learning, background interference is overcome, and the fish school images are obtained. PANet connection is improved, multi-scale information is added, feature extraction is enhanced, and the detection precision is improved. According to the method, automatic detection of underwater fish schools is realized; scientific theory and technical support are provided for automatic fish detection, scientific fishing is specified, ocean resources can be better protected, and sustainable and healthy development of an ocean system is promoted; and a reference scheme can be provided for detection of other marine organisms.

The invention relates to ultra-low temperature cryopreservation and recovery methods for the sperms of the sinocyclocheilus grahami, belonging to the technical field of cryobiology. The ultra-low temperature cryopreservation method comprises the following steps: selecting a manure high-quality protospecies or improved variety, anesthetizing for 5 minutes by 100ppm of MS-222, squeezing the dried abdomen to make the manure semen flow into a 1.5ml centrifuge tube, detecting the vitality of the fresh semen, freezing the fresh semen with the vitality of more than 85%, diluting the semen and the antifreeze liquid (D-15 and 7.5% ethylene glycol) according to the volume ratio of 1:2, subpackaging, balancing at 4 DEG C for 60 minutes, balancing in the position of 6cm above the liquid nitrogen surface for 2 minutes, balancing on the liquid nitrogen surface for 20 seconds and putting in the liquid nitrogen to preserve. The recovery method comprises the following steps: shaking the semen rapidly in the water bath of 37 DEG C to unfreeze, and mixing the sinocyclocheilus grahami sperms squeezed out with the unfreezed semen so that the ovums are fertilized. The methods have low cost, are easy and convenient to operate, ensure that the sperms of the sinocyclocheilus grahami can be preserved for a long time, the recovered sperms have high vitality and the artificially propagated sinocyclocheilus grahami has high fertilizing rate and hatching rate, can realize the large-scale production and are of great significance to the fish resource recovery and reconstruction.

The invention relates to an artificial taming method of a pond with wild bagarius yarrelli, belonging to the technical field of fish culture. The method comprises the following steps of designing the environment of a fish pond, sterilizing the fish pond, sterilizing before putting the bagarius yarrelli and casting baits for taming eating. The method comprises the following detailed steps of: dividing the fish pond into a plurality of ponds which are provided with water inlets and water outlets and have different volumes, then manufacturing water flow and arranging hidden places and activity places in the pond; pumping water from the pond to be dry before putting the bagarius yarrelli for taming, leading calcium lime to form pulp, splashing the pulp in the whole pond according to 10 to 300kg per mu and sterilizing; before putting the bagarius yarrelli, using antibiotic solution of 10 to 100IU/L for soaking each bagarius yarrelli for 15 to 30 minutes for sterilization; before putting the bagarius yarrelli for taming, putting living shrimps, living little fishes and conches in the pond by 10 to 30kg per mu, after putting the bagarius yarrelli for 30 days, putting fish meat of 1 to 3kg on a food table every day, and leading the bagarius yarrelli to be capable of intaking food gradually at fixed time and place. The artificial taming method has simple and convenient operation, low cost and high survival rate of bagarius yarrelli, realizes artificial taming of the wild bagarius yarrelli in the pond and lays the foundation for developing and utilizing native fish resource, namely bagarius yarrelli.