On the vast sea, there is a mysterious large net that can capture countless fish. This is a perplexing mystery that many fishermen are trying to unravel, but have never received a definite answer. However, a young fisherman named John discovered this surprising phenomenon by chance. What is so special about this net bag that it can capture so many fish in the void?

    The Mystery of Fishing Net: Starting from the Life Habits and Behavioral Characteristics of Fish

    The visual acuity of fish is one of the important factors affecting their predation efficiency. Due to different refractive indices in water, fish have varying degrees of deviation from the shape, size, color, and other information of objects. When the mesh is open, it will create an illusion. Sometimes, it looks like a dense clump of algae, and sometimes it looks like a reef, making it difficult for fish to see its boundaries clearly. Once they collide with the mesh, they will be trapped in the net pocket.

    Due to the inherent collective activity of fish, this is also why they fall into fishing nets. Most fish live in a group to help them reproduce and protect each other. When they swim, the fish tend to gather together, so they are easily caught. When a fish falls into a net pocket, other nearby fish find it difficult to resist the temptation to catch it, swarm towards it, and eventually fall into deep water and heat.

    At the same time, the hunting activities of fish schools may also cause harm to net bags. Most fish mainly prey, swimming underwater or waiting for rabbits underwater. When this net opens silently, it will automatically reach the predator's mouth. Fish generally respond quickly and try to escape, but because the net can quickly become a closed space, they rarely have the opportunity to escape.

    Additionally, due to their habits, these fish are likely to fall into fishing nets. For example, many fish have a significant preference area when foraging, where it is easier to catch food. When fishermen fully open and wait for orders at any time, they will realize that appropriate timing and location can increase their fishing efficiency.

Reasonable selection of mesh and materials

    The size, shape, and quantity of fishing gear determine what size and type of fish it can catch. Large mesh is suitable for catching larger fish, while small mesh is suitable for catching smaller fish and benthic fish.

The strength and size of fishing nets should be determined based on the depth of water, flow velocity, and quality of the nets. In waters with fast water flow and turbid water quality, in order to improve fishing efficiency and avoid clogging of the mesh, the density of the mesh can be appropriately reduced.

    The combination of fishing techniques and methods by fishermen has optimized their fishing gear configuration. Skilled individuals can adopt appropriate small mesh sizes to increase fish catch. For fishermen with low technical proficiency, larger fishing nets can be used to reduce operational difficulties and errors.

    Due to the prolonged contact time of the fishing net with water, materials with good corrosion resistance and high tensile strength should be selected. Commonly used fish net materials include nylon, polyethylene, polyester, and so on. Nylon has excellent corrosion resistance and tensile properties, making it the most common material for fishing nets.

In order to adapt to different water conditions, fish nets must have a certain degree of ductility. A fish net with strong elasticity can adapt to various depths and current conditions, thereby improving fishing efficiency.

    The selection of materials also needs to consider the impact of costs. Due to the different materials of fish nets, their prices and lifespan also vary greatly, so it is necessary to comprehensively consider their costs and effects.

    New Fishing Technology Development: Environmentally Friendly Fishing Nets and Effective Fishing Methods

    Developing environmentally friendly fishing nets: Environmentally friendly fishing nets are a new type of fishing net that can reduce the impact of fishing activities on the marine environment. Its biggest feature is the use of environmentally friendly materials, which reduces damage to underwater organisms and plants, while also reducing the capture of non target species. For example, green ecological cages can significantly solve the problem of "mixed fish and dragon" that exists in conventional cages. This technology can identify fish of varying sizes, allowing smaller fish and other species that have not been caught to escape, thereby reducing damage to marine ecology.

    In addition, environmentally friendly fishing nets also have strong selectivity and can adapt to the lifestyle and size of various fish species. On this basis, combining biological remote sensing with intelligent algorithms can achieve accurate determination of factors such as fishing timing, fishing location, and fishing quantity, thereby improving fishing efficiency.

    High efficiency fishing technology is a new type of fishing technology aimed at reducing labor and fuel consumption. Researchers can use GPS and underwater sonar to determine the location and quantity of fish, allowing fishermen to cast their nets more accurately. This can effectively improve capture efficiency and reduce unnecessary losses and waste. Effective fishing methods also involve the use of aircraft and unmanned aerial vehicles to monitor and investigate fish areas. This technology can quickly obtain information on a large area of the sea and provide fishermen with real-time information to help them grasp the optimal fishing time.

    Environmentally friendly fishing nets and efficient fishing are currently hot topics in the development of aquaculture technology in China, and are also key to achieving sustainable development of aquaculture in China.

    On this basis, the use of artificial wetland technology can not only reduce pollution to the marine environment, but also improve the living environment of fish. Although there are still certain difficulties in the popularization and use of this new technology, people are still continuing to improve and promote this new technology. The research on environmentally friendly fishing nets and efficient fishing techniques is of great significance for promoting the sustainable development of China's aquaculture industry.