Commonly used fishing nets are classified as dragnet and sticky net.
1 is a kind of large net, which is feet long, with a drop at the bottom and a float at the top. There are long pipes at both ends. When fishing, tie the rope pipe at one end to the shore, then use the sampan to carry the net and the rope pipe at the other end to spread the net on the sea, and then lead the rope pipe to the shore. When pulling the net, people stand in two rows, follow the horn, quickly close the net, and call it "see the net", which can best reflect the spirit of the fishermen working together. The dragnet is suitable for places where the seabed is flat and the coast is mostly sandy.
2. Flow net
Flow net, also known as "binding net", is composed of mesh and awn. Mangzi is a thin bamboo pole with a red and green flag as a sign and a large buoy installed below. When fishermen go out to sea, they usually use a single-canopied "foot" boat to carry many nets and awns. When fishing, they need to lay a awn, and then lay one or several nets, so that each awn is connected with the net. This kind of net has floating and falling. After casting the net, tie the net pipe to the ship. The net and mango form a net wall in the sea. When fish swim here, they often stick to the net and cannot move forward or backward.
3. Adhesive mesh
Obvious mesh. Fish and shrimp bump into the mesh and can't get in and out. They "stick" to the net. This kind of net is mostly placed in shallow water and ditches. In order to improve their lives in winter, some fishermen often set up sticky nets in the fields to catch birds and wild birds for food. The wild birds in Tianjin are monotonous, with only one kind of sandcock, so it is also called "sandcock".
Extended data:
Fishing net production method
1. Knotting method
It is a traditional method of making fishing nets. The fishing nets are made by knotting the warp and the weft in the shuttle. The size of the knot is four times the diameter of the net rope and protrudes from the plane of the net clothing. This kind of net is called netting. Nodules collide with the fish and the ship's side when the net is hoisted, which not only hurts the fish but also makes the net wear. Moreover, due to the smooth and elastic chemical fiber, it is easy to cause nodules relaxation, uneven mesh and other problems.
2. Twisting method
The two groups of yarns are twisted by the machine at the same time, and they pass through each other to form a net at the junction point. This kind of net is called twisting without knot. Because the yarn at the mesh node is not bent, the mesh clothing is flat, reducing friction, but the efficiency of the twisting machine is low, the preparation process is complex, and the transverse mesh number is limited, which is only suitable for weaving the mesh with large mesh.
3. Warp knitting
Usually, the raschel warp knitting machine with 4 to 8 comb bars is used to connect the warp yarns into loops and form a net, which is called warp knitting without knot. Due to the high speed of the warp knitting machine (600 rpm), the width of the knotted screen door is wide, and the number of horizontal meshes can reach more than 800, so it is convenient to change the specifications, and the production efficiency is several times higher than the former two methods. Warp-knitted non-knot net is flat, wear-resistant, light in weight, stable in structure, high in nodule strength, and not deformed or loose after damage. It can be widely used in marine fishing, freshwater fishing and aquaculture and other special purposes.