19 results about "Leiocassis longirostris" patented technology

The invention discloses a leiocassis longirostris shed-pond relay culture method. The method comprises the following three steps: (1) fine culture in a greenhouse circulating water system; (2) shed-pond relay transfer; and (3) extensive culture in a large-water-surface pond. According to the method, water quality regulation and control, accurate feeding and water resource saving are achieved through circulating water culture, large-scale rapid weight increment of the leiocassis longirostris is achieved through pond culture, the bottleneck of a traditional culture mode is broken through, and the culture mode with stable water quality, controllable diseases and efficient utilization of resources is achieved.

The invention discloses a method and device for predicting the number of leiocassis longirostris populations and a storage medium. The method comprises the steps that the number of fish schools is obtained, and the length and width of fishes, the scanning area, the detection distance and the detection depth are detected; inputting the length and the width of the detection fish into a pre-configured standard frequency estimation model to obtain an occurrence frequency estimation value; performing weighted calculation according to the occurrence frequency estimated value and the equivalent area to obtain an occurrence frequency weighted value; wherein the equivalent area is an area value which is calculated according to the length and width of the detected fish and is used for representing the size of the fish; performing product calculation according to the scanning area, a preset transverse rotation angle and a preset vertical rotation angle to obtain a detection water area; carrying out mean value calculation according to the detection depth to obtain a detection average depth; calculating an effective volume; and based on a preset multi-source data fusion model, performing calculation in combination with the effective volume, the fish school number, the occurrence frequency weighted value and the detection distance to obtain the population number. The method can improve the prediction accuracy.

The invention discloses a leiocassis longirostris fry large-scale cultivation method based on a facility circulating water system, and relates to the field of artificial breeding, and the method comprises the steps of indoor parent intensive cultivation, fertilized egg batch acquisition, fry incubation in a loop incubation pond, fry large-scale cultivation and the like. And water purification treatment and efficient oxygenation are realized. Different circulating water operation modes are adopted in the seedling breeding and domestication cultivation process, the optimal breeding ecological condition is provided, and the process is controllable. According to the Leiocassis longirostris fry hatching and breeding method, the Leiocassis longirostris fry hatching and breeding based on circulating water are adopted for Leiocassis longirostris fry large-scale breeding of a facility circulating water system, accurate control over the Leiocassis longirostris hatching process can be achieved, water quality stability is achieved, the water temperature can be accurately controlled, and water changing and wastewater discharging in the whole process are avoided.

The invention discloses a processing method of high-quality quick-frozen leiocassis longirostris fillets, which comprises the following steps: (1) selecting fresh leiocassis longirostris, slaughtering, cutting into fillets, cleaning and draining; (2) precooling the leiocassis longirostris slices in a dipping freezing liquid; and (3) putting the precooled fish slices into a mixed protective solution of quince seed mucus, fishing out the fish slices, immediately feeding the fish slices into a liquid nitrogen quick-freezing cabinet to freeze the fish slices, and then putting the fish slices into a refrigeration house to be frozen. According to the preparation method disclosed by the invention, a layer of gel coating which takes quince seed mucus as a base material and is added with citrus essential oil is constructed on the surface of the fillet, and the coating is used as a macroscopic physical barrier, so that juice loss of the fillet can be effectively reduced, lipid oxidation can be inhibited, microbial invasion can be blocked, and mechanical support can be provided to prevent freeze cracking. By adopting a dipping pre-cooling mode, the fish meat quality can be well maintained, and meanwhile, the consumption of liquid nitrogen during freezing is reduced.

The invention relates to the field of aquaculture monitoring, and discloses a water quality monitoring device for leiocassis longirostris breeding, which comprises a floating block floating on the water surface, two sides of the floating block are fixedly connected with remote control ships through rod pieces, a winding mechanism is arranged in the floating block, one end of the winding mechanism extends to the water bottom, and the other end of the winding mechanism is connected with a water pump fixedly connected with the floating block. The output end of the water pump is connected with a detector, the other end of the detector is connected with a water outlet pipe, and one end of the water outlet pipe is connected with a retention mechanism located in the floating block. The water layered monitoring requirement is met, the stability of monitoring data is improved, meanwhile, the manual operation risk is reduced, remote control is achieved, detection and sampling work is convenient, and the working efficiency is improved.

The invention discloses a molecular identification method for homologous, near-source and hybrid species of leiocassis longirostris, and belongs to the technical field of fish genetic breeding. The method comprises the following steps: carrying out sequence comparison by virtue of 15 mitochondrial gene complete sequences of a plurality of existing species in a GenBank database, and calculating a similarity percentage index and a sorting index of a gene corresponding to a to-be-detected species in comparison of the plurality of species; finally, the method can accurately judge whether the to-be-detected fish belongs to a plurality of possible species such as homologous species, close species and related hybridized species of the leiocassis longirostris at one time, and a basic identification method is provided for actual production of genetic breeding and cultivation of the homologous species, the close species and the related hybridized species of the leiocassis longirostris.

The invention discloses a drying device for producing leiocassis longirostris feed, and belongs to the technical field of fish feed drying. A drying device for leiocassis longirostris feed production comprises an air supply assembly used for drying materials and suspending materials and a flow channel used for allowing the materials to pass through, and further comprises a vibration assembly used for assisting the air supply assembly in suspending the materials. The air supply assembly comprises an adjustable air supply assembly used for pushing materials to advance, a hot air assembly used for drying the materials and a cold air assembly used for cooling, and the flow channel comprises a main flow channel and a sorting flow channel; according to the drying device, the air supply assembly is arranged and can be used for conducting suspension drying on materials, the adjustable air supply assembly in the air supply assembly is used for pushing the materials to move, the materials with the large water content can move slowly, the materials with the small water content can move fast, then different drying time is achieved, excessive drying or non-drying is avoided, and the drying efficiency is improved. Therefore, the problem that in the prior art, feed drying is not uniform in the fish feed production drying process is solved.

The application discloses a field-used collector and preserver for fertilized eggs of Leiocassis longirostris, and belongs to the technical field of collection, which comprises a suction disc and a preservation box, the end of the suction disc is connected with a diving pipe, the other end of the diving pipe is connected with a screening cylinder through a transparent hose, a screening assembly is arranged in the screening cylinder, an end plate is arranged below the screening assembly, the top end of the end plate is connected with an impeller, the sidewall of the screening cylinder is connected with a gas pressure cylinder through a Z-shaped pipe, and a negative pressure assembly is arranged in the gas pressure cylinder. The single egg losing viscosity can pass through the screen holes with large top and small bottom of the screen plate, and the fertilized eggs with better viscosity are left, so that the collected eggs and fertilized eggs are preliminarily screened, the fertilized eggs are conveniently preserved separately, the micro pump and the water drip are arranged, the flowing water state of the original fertilized eggs of Leiocassis longirostris can be simulated, the water body in the preservation box is continuously oxygenated by the water drip, and the collected fertilized eggs can normally survive.

The invention discloses a leiocassis longirostris parent fish gender identification method based on image color reversal. The method comprises the following steps: S1, selecting and fixing leiocassis longirostris parent fish needing gender identification; s2, identifying the gender of the parent fish through a gender identification system; s3, re-identifying the parent fish of which the sex is not determined; s4, performing male and female classification on the parent fish with the determined gender; the defects of the existing identification method are overcome, compared with external morphological observation, the method is more accurate and has no destructiveness of internal dissection, the cost is lower than that of a molecular biological method, and the equipment cost is lower than that of an ultrasonic technology; according to the leiocassis longirostris sex identification system, the genital foramen features of parent fishes are accurately extracted through image acquisition, image preprocessing, image inversion, feature extraction and classification identification modules in the sex identification system, then sex identification is carried out, the parent fishes of which the sex is determined are classified and marked, subsequent management and breeding are facilitated, and the leiocassis longirostris genetic breeding and breeding efficiency is improved.

The invention provides a young leiocassis longirostris pond feed transferring method. The young leiocassis longirostris pond feed transferring method comprises the steps of pond preparation, net enclosure repairing, aerator arrangement, incandescent lamp pole erecting, feed transferring basket manufacturing and fry stocking. The material transferring process comprises the steps of feeding plankton, removing plankton, processing artificial feed and controlling the transferring time. By adopting the method for transferring the young leiocassis longirostris, the leiocassis longirostris fries which are successfully transferred can be cultivated in batches in a planned manner so as to meet the requirements of users, and excessive loss of the leiocassis longirostris fries in the process of transferring the leiocassis longirostris fries is avoided. Experimental results show that the conversion rate of the whole pool is about 60% and can be increased by more than 20% compared with the conversion rate in the prior art.

The utility model relates to the technical field of fish cake making, and discloses a leiocassis longirostris fish cake making mold which comprises an outer mold box, an inner mold frame located in the outer mold box and food gauze laid in the outer mold box, the bottom of the outer mold box is provided with a cavity and a through opening leading to the cavity, the through opening is covered with a lifting plate, and the lifting plate is connected with the inner mold frame. The lifting plate is located in the inner mold frame, and an adjusting assembly for driving the lifting plate to ascend and descend is arranged in the cavity. The fish cake discharging and slitting device has the advantages that fish cake discharging and slitting are integrated, working hours are saved, and the fish cake production efficiency is improved.

The present application relates to the field of biotechnology, and more particularly to a primer, kit and method for identifying Pelteobagrus vachelli, Pelteobagrus nitidus, Leiocassis longirostris and their hybrids, wherein the forward and reverse primer sequences in the primer are shown in SEQ ID NO: 1 and SEQ ID NO: 2, respectively. The present application uses fin strip micro samples for DNA extraction, and then completes species identification through PCR amplification combined with agarose gel electrophoresis technology. The detection result has high accuracy and strong genetic marker specificity, and is not subject to the growth of the fish body. The fish body can be sampled and identified at each breeding stage, thereby providing important technical support for aquatic breeding management.

The utility model relates to the technical field of fishery product breeding, and discloses a leiocassis longirostris breeding circulating barrel which comprises a barrel body, the bottom of the barrel body inclines downwards, a waste cavity is formed in the center of the bottom of the barrel body in the vertical direction, a plurality of strip-shaped grooves in the vertical direction are formed in the top of the waste cavity, and a fixing assembly for fixing the waste cavity is arranged at the bottom of the barrel body. A supporting frame is fixedly arranged on one side of the barrel body, a circulating assembly is arranged on the supporting frame, a fixing frame is arranged at the top of the barrel body, and a feeding assembly is arranged on the fixing frame; the fixing assembly comprises a mounting base arranged at the center of the bottom of the barrel body, the end, away from the barrel body, of the mounting base is in threaded connection with a rotating piece, an elastic piece is inserted into the mounting base, and a cavity allowing the waste cavity to be inserted therein is formed in the elastic piece. And the rotating piece drives the elastic piece to move towards the barrel body, so that the elastic piece extrudes towards the center to fix the waste cavity. The leiocassis longirostris barrel is convenient to collect and treat excreted excrement and other impurities, and has the effects of improving the quality of water in the barrel and improving the quality of leiocassis longirostris.

The application relates to the field of aquaculture, in particular to a culture method of longsnout catfish (Leiocassis longirostris) in the culture of penaeus vannamei, which comprises the following steps: pond preparation, fry stocking, feed feeding, water quality management, daily management, fishing and harvesting, etc. The application establishes a multi-nutrient level culture mode of fish and shrimp symbiosis, fully utilizes the water space of the culture pond of penaeus vannamei, improves the water utilization rate of the pond, improves the production efficiency, utilizes the habits of longsnout catfish and penaeus vannamei, plays the effect of fish and shrimp ecological comprehensive disease prevention, improves the growth environment of fish, improves the feed utilization rate, reduces the total feed coefficient, reduces the wastewater discharge, and improves the energy efficiency of aquaculture. The application is simple in operation and easy to popularize.

This invention discloses a method and system for regulating the hatching environment of *Catfish simonii* based on multi-parameter sensing via the Internet of Things (IoT), specifically relating to the field of multivariable environment automatic control technology. It addresses the problem of inaccurate multivariable control commands in existing collaborative control methods due to reliance on distorted data when sensing network dynamics. By acquiring multi-parameter monitoring data of the water body, network topology information, and equipment status data, it establishes spatial gradient change predictions for key parameters to diagnose node performance degradation and detects equipment start-up and shutdown events to analyze transient response curves and determine abnormal coupling relationships. Subsequently, it identifies affected parameters and regions, and performs reliability assessment and correction on data from degraded nodes. Finally, based on the corrected reliable data, it generates collaborative control commands for heating, aeration, and water flow equipment. This achieves robust collaborative control under conditions of sensing uncertainty, improving the stability and accuracy of multivariable environment control.

The invention relates to the technical field of biology, in particular to primers, a kit and a method for identifying pelteobagrus fulvidraco, pelteobagrus vachelli, leiocassis longirostris and hybrids of the pelteobagrus fulvidraco, the pelteobagrus vachelli, the leiocassis longirostris and the hybrids of the pelteobagrus fulvidraco and the leiocassis longirostris. According to the method, after DNA extraction is carried out on a fin ray trace sample, species identification can be completed through combination of PCR amplification and an agarose gel electrophoresis technology, the accuracy of a detection result is high, the genetic marker specificity is high, the method is not limited by the growth condition of fish bodies, sampling identification can be carried out in all breeding stages, and an important technical support is provided for aquatic product breeding management.

The present invention discloses a method, device and storage medium for predicting the population quantity of Leiocassis longirostris. The method includes obtaining the quantity of fish schools, detecting the length and width of fish, the scanning area, the detection distance and the detection depth; inputting the detected length and width of fish into a pre-configured standard frequency estimation model to obtain an estimated value of the occurrence frequency; performing weighted calculation based on the estimated value of the occurrence frequency and the equivalent area to obtain a weighted value of the occurrence frequency; wherein the equivalent area is calculated according to the detected length and width of fish and is an area value representing the size of fish; performing product calculation based on the scanning area, a preset horizontal rotation angle and a preset vertical rotation angle to obtain the detected water area; performing mean calculation based on the detection depth to obtain the average detection depth; calculating the effective volume; and based on a preset multi-source data fusion model, performing calculation by combining the effective volume, the quantity of fish schools, the weighted value of the occurrence frequency and the detection distance to obtain the population quantity. This method can improve the prediction accuracy.

The invention discloses a preparation method of an aquatic feed for leiocassis longirostris, and belongs to the field of fish feed processing. The preparation method includes the steps that feed raw materials are put into a stirring barrel to be stirred and mixed; the stirred and mixed feed is output from the stirring barrel, and the stirred and mixed feed enters a material homogenizing assembly to be further scattered; the feed scattered by the feed homogenizing assembly enters the discharge structure to be output, and meanwhile, a special preparation structure is arranged according to the preparation method. The feed mixing device has the beneficial effects that feed rises while being mixed and is impacted by the stirring rod, raw materials which are bonded into clusters are scattered, the raw materials can be conveniently mixed with other raw materials, and the feed mixing uniformity can be improved; meanwhile, in the device, the feed mixed by the stirring barrel falls on the material homogenizing net and then is subjected to the effect of the material homogenizing plate, and the clustered feed can be directly pressed to be scattered; and finally, the auger conveyor in the device is used for conveying the feed when the final mixing is executed.

The invention relates to the technical field of aquaculture methods, in particular to a transportation method and a transportation system for breeding leiocassis longirostris and improving the survival rate. The transportation method comprises the whole process from preparation before fishing to recuperating in a feeding place, and the transportation system comprises a treatment unit before transportation, a transportation unit and a temporary recuperating unit after transportation. By using the system and the method, the purposes of promoting wound recovery of the leiocassis longirostris and preventing and controlling diseases such as bacteria, mould, ichthyophthirius multifiliis and sporozoan can be achieved, and the system and the method are suitable for daily long-distance transport, parent transport, cultivation and the like of the leiocassis longirostris. According to the technical scheme, the technical problem that in the prior art, the death rate of leiocassis longirostris after long-distance transportation is high can be solved. The transportation method and system for improving the survival rate not only solve challenges faced by the leiocassis longirostris in the transportation process, but also have important significance for promoting healthy and stable development of the leiocassis longirostris industry, and have ideal application and popularization prospects.