Fishing net, the first finger net is several centimeters, the second finger net is several centimeters, and the third finger net is several centimeters.

The mesh of a fishing net is 1 cm. Fishing nets are generally perforated with fingers, such as (1 finger, 2 fingers, 2 fingers and a half, 3 fingers, 3 fingers and a half, 4 fingers, 5 fingers ...), 1 means 1 cm, two fingers are 2 cm, and so on. This centimeter length refers to the length of the square on the fishing net.

1 refers to the reference fishing trip: white striped fish, horse mouth, stick flower, wheat ear, dingchuan, goby fish, etc.

2 refers to the reference fishing range: Pelteobagrus fulvidraco, small crucian carp, large white striped fish, etc.

3 refers to the reference fishing range: crucian carp, etc. (about 2~8 taels).

Fishermen do not use dense nets when fishing with nets. First, if the net catches a small fish, the small fish that are not caught by the net will immediately realize that the danger is approaching after touching the net, so they will flee everywhere, which will alarm the big fish that have not touched the net, so the big fish will also realize the danger and take avoidance and escape measures, thus greatly reducing the chance of catching a big fish. Second, the low commercial value of small fish will also affect the reproduction of fish. The same is true for large fishing grounds, which close their nets every breeding season. In addition, it is also important to choose the starting point of casting the net. Pulling a net in the direction with more fish is completely different from pulling a net in the direction with less fish.

Fishing net, fishing net. Structural materials of special fishing tools. More than 99% is made of synthetic fibers. There are mainly monofilaments, multifilaments or multifilaments of nylon 6 or modified nylon, and fibers such as polyethylene, polyester and polyvinylidene chloride can also be used. Fishing nets have many functions. Fishing nets are divided into gill nets, trawls, purse seines, netting and laying nets according to their functions. It requires high transparency (partial nylon mesh) and strength, good impact resistance, wear resistance, mesh size stability and softness, and appropriate elongation at break (22% ~ 25%). It is made of monofilament, multifilament twisted yarn (with mesh) or monofilament through weaving (Raschel), primary heat treatment (fixing nodules), dyeing and secondary heat treatment (fixing mesh size).

Ancient people used coarse cloth and hemp as raw materials to make fishing nets by binding. Although this fishing net is rotten and tough, the fishing efficiency has been greatly improved. With the development of fishery, the object of fishing and hunting is not only fish, but also fishing tools keep pace with the times. Modern fishing nets are mainly made of polyethylene, nylon and other raw materials. The service life is longer, the fishing efficiency is higher, and it can be classified according to different use modes. For example, traditional fishing nets (hand nets, hand nets), trawls powered by ships, gill nets (triple nets, purse seines) with different meshes used to catch trapped fish, etc. These nets are woven with different mesh sizes and different materials according to different fishing objects. At the same time, with the development of fishing nets, various fishing tools came into being, such as fishing net cages and four-corner nets, which are commonly used fishing tools.