13 results about "Cannibalism" patented technology

According to the technical scheme, the sheltering device is characterized by comprising a plurality of layers of flexible rope nets, the rope nets are horizontally arranged and arranged in the vertical direction, the rope nets are sequentially connected, the two sides of the rope net on the top layer are connected with supporting rods respectively, the supporting rods are connected with floating blocks, and the floating blocks are connected with the rope nets on the bottom layer. The rope net on the bottom layer is connected with a sinking block, and a telescopic piece is connected between the supporting rods and used for adjusting the distance between the two supporting rods. The multi-layer rope net can provide rest and sheltering for shrimps in the molting period in a culture water body and avoid similar disabilities, and the telescopic piece is arranged so that the distance between the supporting rods can be adjusted at any time, and therefore the size of meshes of the rope net can be adjusted, and the multi-layer rope net can adapt to shrimps of different specifications and growth stages.

The invention discloses a method for culturing Eriocheir sinensis with oyster shells, which comprises the following steps: S1, pretreating a crab pond, and laying a microporous oxygenation pipeline; s2, collecting the waste oyster shells, and performing cleaning, disinfection and drying treatment; s3, the oyster shells treated in the step S2 are stacked in a long ridge shape in the crab pond in the direction parallel to the micropore oxygenation pipeline, and the whole crab pond is disinfected; s4, waterweed is planted in the oyster shell ridge direction in the middle ten days of January; s5, crab species are stocked in early February, so that the environment richness of the crab pond is improved, self-killing of the river crabs is reduced, the survival rate is increased, and the adult crab breeding technology is more environmentally friendly and efficient.

This invention relates to the field of artificial breeding technology for natural enemy insects, and in particular to a method for the artificial breeding of the assassin bug *Triplophysa pulcherrima*. The invention employs steps including seed source collection and screening, rearing environment control, feed supply and management, mating and reproduction management, oviposition and egg mass collection, nymph hatching and age-differentiated rearing, overwintering management, and cannibalism control. By providing specialized rearing management devices, temperature and humidity conditions, standardized feed feeding, age-differentiated rearing density control, and moisture-controlled egg mass hatching, it solves the problems of high mortality rates among young nymphs, unstable mating success rates, low egg mass hatching rates, and the lack of a year-round breeding system in existing technologies. The method of this invention is simple to operate, has a high survival rate (nymphal survival rate exceeding 85%), an egg mass hatching rate exceeding 90%, and can achieve 4-5 generations per year, enabling large-scale, year-round production of *Triplophysa pulcherrima*, providing high-quality natural enemy resources for the biological control of agricultural and forestry pests.

The invention relates to the field of fish culture early warning, in particular to a carnivorous fish similar feeding intelligent isolation device based on machine vision and an early warning method. The device mainly comprises a culture box, a visual collection module, a system control and data processing mechanism and an array type air curtain generation mechanism located at the box bottom, the visual collection module obtains a water body image in the culture box in real time, and an embedded terminal operates and uses a posture sensing network capable of outputting a target space position and multiple structure key points at the same time. The vector included angle and Euclidean distance of the spine of the fish body are calculated in real time by extracting anatomical key points such as the head, dorsal fins and caudal peduncles of the fish body; when a target fish body is monitored to present a high-curvature attack posture, the system locks a conflict area immediately through coordinate mapping, drives the integrated micropore aerator pipe array to release compressed air, and generates a vertical non-contact bubble barrier between an attacker and an attacked person to realize physical isolation. The invention is suitable for fish culture.

The present application relates to the field of fish farming early warning, in particular to a kind of intelligent isolation device and early warning method for carnivorous fish cannibalism based on machine vision.The device mainly includes a breeding tank, a visual acquisition module, a system control and data processing mechanism, and an array air curtain generating mechanism at the bottom of the tank.The visual acquisition module acquires real-time water images in the breeding tank.A posture perception network capable of outputting target spatial position and multiple structural key points is used in embedded terminal operation.The vector angle and Euclidean distance of fish spine are calculated in real time by extracting anatomical key points such as fish head, dorsal fin and tail handle.When the target fish presents a high-curvature attack posture, the system immediately locks the conflict area through coordinate mapping and drives the integrated micro-porous aeration pipe array to release compressed air, generating a vertical non-contact bubble barrier between the attacker and the victim, achieving physical isolation.The present application is suitable for fish farming.

The utility model discloses a biomimetic nest for macrobrachium culture, and relates to the technical field of macrobrachium culture, the biomimetic nest for macrobrachium culture comprises an elastic bandage, a plurality of biomimetic modules are arranged inside the elastic bandage, and the biomimetic modules are bound and fixed through the elastic bandage. The bionic module comprises a fixing assembly and pipe bodies, one fixing assembly corresponds to four pipe bodies, the four pipe bodies are located on the periphery of the fixing assembly, the fixing assembly comprises a center base, connecting arms are arranged on the peripheral surface of the center base, fixing frames are arranged at one ends of the connecting arms in a hot melting mode, and the fixing frames are connected with the fixing assemblies in a hot melting mode. By means of the scheme, the problems that when existing macrobrachium rosenbergii is bred, due to the fact that the macrobrachium rosenbergii is prone to being stacked together, the macrobrachium rosenbergii fight with one another, the macrobrachium rosenbergii eats silkworm after shelling, the death rate is high, and the breeding effect is poor are solved.

The application discloses a kind of female development fry cultivation equipment of large mouth bass, specifically belongs to large mouth bass fry technology field, including fixed plate, cultivation cylinder and grid device;Grid device includes sliding ring, stress resistance pole, connecting rod, slide rail and isolation baffle;The upper end of fixed plate is equipped with fence, and the sidewall of cultivation cylinder is equipped with sliding groove;Sliding ring is slidably arranged in sliding groove;Stress resistance pole side end and sliding ring upper end are tightly contacted, and the end of stress resistance pole and connecting rod are rotatably connected, and connecting rod is slidably arranged on slide rail, and correspondingly, slide rail is equipped with sliding slot;Fence is equipped with accommodating groove, and slide rail is rotatably connected on the groove wall of accommodating groove;Isolation baffle is fixed on slide rail, and located on the side away from connecting rod.The equipment has the following advantages: 1, single breeding large mouth bass fry, avoid fish fry between each other and death by cannibalism.2, by setting grid device, avoid fish fry in the process of breeding, jump out to ground or other breeding area, so as to damage the survival rate of fish fry.

The application provides a method for large-mouth catfish fry conversion feeding, and belongs to the technical field of large-mouth catfish fry conversion feeding. The method for large-mouth catfish fry conversion feeding provided by the application feeds water worms at the beginning of the fry conversion feeding stage, then feeds pig liver for fry cultivation, and then feeds conversion feed made of pig liver and large-mouth catfish fry powder in different proportions. Through 25-36 days of step-by-step conversion feeding, the fry successfully feeds on artificial compound feed, and the fry size grows from the initial 0.5g / fish-1.7g / fish to 7g / fish-12g / fish. The large-mouth catfish fry conversion feeding is completed, and the fry conversion feeding survival rate can reach more than 89.5%. Meanwhile, the method provided by the application divides the fry into different sizes for feeding by screening the fish once every 6-9 days during the conversion feeding cultivation process, so that the self-cannibalism caused by large size difference is effectively prevented.

This invention relates to a grading device for juvenile fish rearing, addressing the problem of cannibalism among juvenile fish during rearing, leading to injury or even mass mortality. The device features a cylindrical central pool at the center of the rearing pond. A first pool and a second pool are located on either side of the central pool. These pools are separated, allowing water to pass through but not fish. Fish-passing plates with holes are installed on the side walls of the central pool, corresponding to the first and second pools. A rotating shaft connects to a rotating drive net plate at the central axis of the central pool. A swinging intercepting net plate is installed on the inner side of the central pool wall, beside the fish-passing plates. When retracted, the swinging intercepting net plate rests against the pool wall; when extended, its inner end abuts against a central pillar. This invention separates smaller juvenile fish during rearing, reducing stocking density and minimizing cannibalism.

This invention discloses an intelligent fish fry size, color, and sex selection system based on morphometric feature recognition. The system includes a fry batching module, a diversion and conveying module for processing the fry fed through the batching module, and a fry feature and size discrimination module located above the diversion and conveying module. The fry feature and size discrimination module provides the diversion basis by acquiring fry feature information from fry images. The module includes a shell, a high-definition camera and lighting embedded in the shell facing the diversion slide, and an image processing component installed inside the shell. This invention designs a multi-angle screening system for fry size, body color, and sex, overcoming the three key difficulties in fish fry breeding: size selection, color selection, and sex selection. It effectively solves problems such as cannibalism between larger and smaller fish, selection of ornamental fish, and sex selection at the fry stage, accelerating the artificial breeding process and improving production efficiency.

The application relates to the crab breeding technical field and discloses an ecological crab nest simulating a natural environment, which comprises the following steps: a pipe body is arranged to be inclined relative to a horizontal plane, a clay layer attached in the pipe body forms a hollow channel and a main body bin, the main body bin is located at one end of the pipe body with a lower height, one end of the pipe body with a higher height is provided with a hole, a top wall of the pipe body is provided with a feeding opening for feeding the main body bin, one end of the channel is communicated with the main body bin, and the other end of the channel extends to be communicated with the hole; the diameter of the channel is matched with the body of a crab, and the diameters of the main body bin and the hole are greater than the body of the crab. Compared with natural water area or pond culture, the ecological crab nest is convenient to salvage, is not easy to cause harm to the crabs during fishing, does not affect the appearance, can realize one crab one nest, reduces the cannibalism of the crabs and the influence of other breeding varieties, is beneficial to the survival and growth of the crabs, the crabs are fed through the feeding opening, feeding into water is avoided, feed waste is reduced, and pollution to water quality is effectively avoided.

The present application relates to a kind of low-salt pond engineering culture method of Macrobrachium Nipponense.The present application is in hard bottom soil pond in early stage of Macrobrachium Nipponense high-density intensive culture, avoid the disease period of early growth of Macrobrachium Nipponense, improve the growth stress resistance of prawn.Afterwards, with the growth of Macrobrachium Nipponense, its living space is gradually compressed, and serious mutual cannibalism.Therefore, it is transferred to the soft bottom soil pond with larger space, rich biological bait and strong self-regulation ability of water quality in the middle and late stage of culture.The present application makes full use of the advantages of hard bottom soil pond and soft bottom soil pond with netting by engineering modification of low-salt shrimp pond, reduces the disease rate of Macrobrachium Nipponense, ensures Macrobrachium Nipponense to pass through the juvenile stage, promotes growth, shortens the culture period, reduces cannibalism, improves the yield and economic benefits of culture.

The invention relates to the technical field of aquaculture equipment, in particular to a shrimp three-dimensional aquaculture net cage which comprises a floating box, a vertical rod and a net cage body which are installed at the bottom of the floating box and further comprises two sets of separation mechanisms which are arranged in the net cage body in a staggered mode and divide the interior of the net cage body into three parts. Shrimp nests for providing hiding spaces for shrimps are mounted at the bottom of the inner wall of the net cage body; the floating plate fixedly penetrates through the two sides of the net cage body, and a shielding mechanism is installed in the floating plate; according to the net cage, the areas in the net cage body are divided, feeding is conducted on the different areas, high-density breeding can be achieved, in addition, by arranging the shrimp nests, hiding space can be provided for shrimps in the shelling period, and the problems that when part of existing net cages for shrimp breeding are used, the internal space is single, and during high-density breeding, the breeding efficiency is high are solved. The problem that the survival rate of the shrimps is easily affected due to the fact that the shrimps are easily attacked by the same kind and are not eaten by the same kind is solved.