1. Squid Hand-net Fishing Technology

Squid handwritten nets are mainly distributed in Weizhou Island, Beihai City, Guangxi. Fishing season 2~5 months and 8~12 months. The fishing ground is located in the water depth of 10~12m around Weizhou. The fishing gear is a push-through pocket copy net.

1. The fishing gear structure consists of three parts: the handle, the frame and the net. The handle is a wooden pole with a diameter of about 30mm and a length of 2.7m. The frame is circular, 700mm in diameter, made of 6mm diameter steel bars. The net bag is made of nylon monofilament with a mesh opening of 150 mesh and a mesh size of 30mm, which is braided with nylon monofilament with a diameter of 0.3mm.

2. Fishing boat wooden sampan, with a total length of 4m. Some fishing boats are equipped with power hangers. Each ship is equipped with 2 kerosene lamps, mainly for single operation.

3. The fishing method arrives at the fishing ground in the evening. First, light the lamp to lure the fish. After the squid is concentrated and stable, they will be caught by hand. General evening 8~10h, squid phototaxis is strong, but also more stable, it is appropriate to choose this period of time operations. The effect is better when the flow is slow, the wind is small (level 3~4), the water is clear and the May light is light, especially when the water is about to turn, the squid is more active and easier to catch. When the squid does not surface, but stays at the edge of the light zone or the lower waters, hand-made nets can not be caught, can be used to catch or lure to the surface of the water after the capture.

2. Arch Net Fishing Technology

The arch net is a single ship surface frame copy net, one ship two nets operating in the near surface waters. Distribution in Shandong Zhanhua, Wudi and other places. Spring flood season is from April to June, and autumn flood season is from late July to mid September. The fishing ground is located at the coastal estuary with water depth of 1.5~2m. Night operation, the main catch back white shrimp, prawns, shrimp and small fish.

1. Main scale of fishing gear structure: 13.10m × l0.03m. Fishing gear consists of net, rope, brace, etc. The mesh is braided by ethylene fiber thread, with a mesh opening of 1200 mesh and a mesh size of 57mm, and gradually decreases to a mesh bag of 220 mesh and a mesh size of 8mm.

2. Fishing boat wooden small motor boat, with a total length of 14m, a width of 4.2m, a depth of 1.6m, a load of 10t and a main engine power of 14.7kW. Three people work.

3. Fishing Law

(1) After the net release arrives at the fishing ground, arrange the net gear, hang the net gear on the vertical pole and the cross pole, tie the inner hanging bar to the bow cable pile, connect the net lifting rope to the stern mooring pile, finally use the mast pulley to lift the whole net gear and push it out of the ship, loosen the pulley rope, and put the net gear into the water.

(2) The belt net shall adjust each rope to a suitable length, and then the idle train shall carry the belt net in reverse flow at a speed of 1.0~1.5kn.

(3) The time to take the net is determined according to the amount of catch, and the net is generally taken once in 2h. When lifting the net, stop the car, pull up the net rope, lift the net bag onto the boat, and pour out the catch.

3. Waist Fishing Technique

It is tied to push the pocket-shaped copy net. The operating fishing ground is sand and sand-mud shoal with a water depth of 1m. Mainly catch small miscellaneous fish, shrimp, crabs.

The main scale of one of the main waist is 7.85m x 4.72m. The net garment is braided with nylon monofilament manual double dead knot, which is composed of net body, edge net, cover net, net bottom and triangular net. Sections 1-6 of the net garment are eye-increasing parts, paragraph 7 is straight, paragraphs 8-9 are eye-decreasing parts, and the last paragraph is straight. The segments are sewn with eye-to-eye knitting and connected to form a large rectangular mesh. The leading edge net is 8m long and the trailing edge net is 2.87m long. After the edge net is installed, the net is trapezoidal, and the rear of the net naturally forms a capsule shape.

The main tools are rods and shoes. The bamboo rod is made of long rod-shaped, 7.05m long, with the head bent into an arch at 1m and 2 branches, which are used to open net clothes. The lifting shoes are made of hard miscellaneous wood, with a size of 20 × 13 × 10cm, and are assembled at both ends of the leading edge net, and the lifting rods are worn on them to slide during operation.

One-man job. When working, put down the waist and lift the two lifting rods, hold the left and right lifting rods separately with both hands, and lift the fishing gear. Take fish once every 5~10min. The fishing ground which is not restricted by the ebb and flow tide can be operated continuously for 12h. [2]

4. shrimp and crabs

It is a special fishing gear for shrimp and crabs.

The size of the shrimp net is 30mm, and the bottom net mouth is 500. The side net mouth is 300 mesh, with a total length of 12.4m. The two ships are tied together, and a net is laid in the sea between the two ships, and the net mouth is opened with a vertical support bamboo. When the shrimp group is explored, the two boats advance to make the shrimp group enter the net, get up to the net to support the bamboo, and copy the catch onto the boat.

The center of the crab net is a 1.0~1.1kg plumb bob, around which 8 metal rods with a length of 30~40cm are cast, and the rod ends are bent upward by 4.5cm. The upper part of the plumb is cast with a hammer handle, the handle end is bent by 15cm and hooked on the root end of the hand. The mesh is about 5.4cm by knitting the net on the angle metal rod.

During the operation, bait is installed on the central plumb part of the net, and several top crab nets are laid down along the ship's side and sank to the bottom of the sea. Usually, when the tide is more rapid, the catch effect is good.