Chapter 1870

To catch this fish group, Qin Shiou chose to use double boat purse seine fishing, and then supplemented it with longline fishing. After listening to his order, shack and sea monster nodded and said it was very appropriate.

The English name of double boat purse seine fishing is two boat pure Seine fishing, which is referred to as double boat purse seine fishing for short. It has left a brilliant page in the history of ocean fishing in the world.

In modern times, this technology was developed by Japan, Europe and the United States, but in fact, this method was created by Chinese fishermen as early as the mid-17th century. At that time, many fleets along the coast of Guangdong province adopted this method of fishing, but it was eliminated because of the insufficient mobility of ships and the convenience and safety of single ship mobile fence.

Later, in 1837, the United States began to try double boat purse seine fishing for oil herring off the coast of Maine. After the success, it gradually formed an oil herring double boat purse seine fishing with steam engine fishing boat as the mother ship on the east coast, which was operated by one mother ship with two net releasing sub ships. By 1900, the technology of double boat purse seine fishing was introduced into the coast of Europe and Japan, and was completely popular all over the world.

Compared with single vessel trawl fishing, this method is more efficient, but it is difficult to use. At least, it requires two fishing vessels with the same performance to surround fish with long belt Seine nets, and it is best to have a mother ship center command, that is, three ships are required, two of which are independent operation ships and one is mother ship.

Qin Shiou made preparations in advance. He used the princess as the mother ship and opened two purse seine ships of the same size from the town for independent operation. The three ships were deployed at sea, like an aircraft carrier fighting with a destroyer. The scene was very exciting.

Zhong Dajun and Mao Weilong experienced such an occasion for the first time. They followed Qin Shiou to inspect the stern. Then Qin Shiou entered the cockpit, took a telescope and directed the network with a wireless phone. They also followed back to the cockpit to watch the scene.

Shaq took several strong fishermen such as bulls into the water in a small boat and deployed a series of strong light lamps on the sea. The deep-sea fish have directional light. To concentrate them, they not only need to expel the sperm whales, but also use strong light to lure them to the upper waters.

Sardine chub mackerel was once dominated by the Atlantic's fishing industry, such as mackerel, mackerel, herring, sardines and tuna, which were almost always caught in this way.

Bluefin tuna is almost extinct, which is also the reason for this fishing technology.

Qin Shiou accurately positioned the moving position of the fish group with Poseidon consciousness, and then ordered two independent operation ships to move slowly and put the purse seine into the water.

The two independent operation ships are ordinary small fishing boats, about 14 meters long and 3 meters wide. 5 meters, the main engine is an 80 kW gasoline engine, with good mobility. The ship is equipped with a winch and a power pulley, which are specially used to lower the net. In fact, there are professional vertical fish detector and locator on the ship, but the machine can't be used under the command of Qin Shiou.

With the development of modern science and technology, the captain of a large fishing boat can still get a high salary. Why? The reason is that these captains are very good at finding catches and arranging networks. Their eyes and experience are often more useful than fish detectors, and they are more helpful to large fishing vessels.

Under the command of Qin Shiou, the key work of this fishing began, that is, netting.

Two independent operation ships moved slowly but flexibly on the sea, and an ultra long Purse Seine was pulled away. This purse seine is 2500 feet in total, that is, more than 760 meters. It is the largest Purse Seine, which is specially used to catch tuna.

When the sea monster in the cab saw the slowly unfolding super long Purse Seine, his face showed a nostalgic expression and said, "snow, how long have you not seen this damn double eyed giant? Oh, snow, snow, since tuna fishing was banned in St. Lawrence Bay, I thought I would never see this double eyed giant again. I didn't expect to be lucky to meet this old man today. I'm really glad! "

Binocular giant is the nickname of super large purse seine, which fishermen hope to call it, because the two wings of this kind of net are very long and symmetrical, which can be compared to the two big eyes on the face.

The corresponding one eyed giant is the independent trawl. Fishermen give their tools various nicknames, just like the entrance of the underworld, there are many incisions, whispers, slang and so on.

From the two wings to the middle, that is the position of the net bag. The net bag of the double purse seine is wide and short, and its net clothes are straightened and elongated by about 120 meters. Its upper and lower edges are equipped with edge net clothes and upper and lower links. The upper edge and upper link are attached with floats made of small leather balls, while the lower edge and lower link are bound with plumb bob.

In this way, when the two wings of the purse seine are opened and connected with the traction mesh through the upper and lower fork mesh, the middle of the upper and lower part of the mesh mouth is equipped with a triangular mesh coat, the float floats and the plumb bob sinks, and a heaven and earth net opens.

Driven by the big whales, the bluefin tuna group swam to the water in panic. There was a strong light flashing on the water. In fact, this light attracted not all tuna, but only some fish. Tuna has strong conformity. Fish attracted by strong light swim on the water, and other fish will follow.

When the Seine was launched, Qin Shiou observed the swimming of the bluefin tuna group with the Sea God consciousness. They swam from the deep sea to the water surface, so the formation was arranged straight up and down, not in parallel as usual, stretching the team very long.

Looking down from above, Poseidon consciousness feels that the current distribution shape of the fish is similar to a cylinder. Of course, it is not very regular. Some fish are too frightened and still run around.

These fish will be missed fish. Qin Shiou will ignore them first. Later, he will arrange longline fishing to deal with the missed fish. Now what we need to do is to Purse Seine and harvest the big fish!

When the whole fish group entered the sea area controlled by the fishing net, Qin Shiou snapped his fingers and said to the phone: "all right, guys, prepare to close the door and welcome the harvest!"

In addition to the plumb bob, the lower part of the purse seine is also equipped with a bottom ring. As long as the net is to be closed, it can be controlled to settle rapidly, and then close the bottom of the net ring.

The closure of the bottom ring was normal, but it was difficult to close the fishing net from top to bottom. The driver of a ship shouted, "boss, no, the tide is too big, and the net swings too much!"

The operation mode of double boat Purse Seine is easily limited by the undercurrent, wind current and tide of the fishing ground. First, the fishing boat operating independently is small and the speed is slow. Second, the fishing net is too large. Although it is mainly hollow large holes, the net line is also very thick, and the impact force of the current is also great. In addition, the tuna trapped inside is strong and strong, and an careless fishing net will be torn up!