Golden Fishing Village

"There is a tuna in the fishing ground." Ao Muyang told Lu Zhizi the news.

Lu Zhizi was doubtful: "True or false? How is it possible? You can still raise tuna?"

Ao Muyang said: "Wait a minute, I'll put on a deep diving suit for you so you can withstand the cold, and then I'll take you to the water to see if there's really a tuna!"

Lu Zhizi saw his serious expression and believed what he said, with surprise on his face: "Then you must take a look. Aren't the problems of artificial breeding of tuna not yet overcome?"

This tuna does not dive deep, so they only need to dive on the surface of the ocean. The reason why they wear deep diving suits is because they are the warmest.

Ao Muyang was still dressed simply, Lu Zhizi said, "Aren't you too cold?"

"I have strong firepower." He patted his belly and smiled coquettishly.

The two dived into the water and waited around an oxygen generator.

Not long after, the majestic figure of the bluefin tuna appeared.

It wandered slowly around the oxygen generator for two minutes, swimming in a spiral shape. It started swimming from the depths first, and its speed became slower and slower. Finally, when it reached the oxygen generator, it was the slowest.

Then, it leaves this oxygen generator and goes to the next oxygen generator, dives again, and at the same time speeds up again, gradually speeding up, until it swims to the next oxygen generator, and then repeats the process...

Lu Zhizi emerged from the water and exclaimed: "Really, this is really a tuna, or a bluefin tuna. I have seen it in Boston, but I have never seen it alive!"

Ao Muyang said proudly: "How about it, it's awesome, I raised a bluefin tuna!"

Lu Zhizi said excitedly: "This is amazing. Where did you get this bluefin tuna?"

Ao Muyang lied: "It jumped in by itself, right? I don't know. Anyway, I came here this time and found this fish. I was shocked at the time. I guess it jumped in from outside. After all, There are many fish fry in this fishery, which are all food for them.”

After thinking about it, Lu Zhizi said: "If that's the case, there should be bluefin tuna around, and they tend to like to travel in groups."

Ao Muyang said: "Perhaps the others have left?"

Lu Zhizi said: "Wait a minute, I will recall some information about tuna first."

She swam back to the shore and said slowly: "This season, bluefin tuna should go to the southern hemisphere. They are subtropical and tropical fish. They will go to the southern hemisphere in winter, and then migrate to spawn in spring and summer."

Ao Muyang knows this. Most fish, like snakes, are cold-blooded creatures, that is, their body temperature will change with changes in the external environment. However, the ocean temperature is relatively constant all year round, so their body temperature does not change much throughout the year, unlike mammals. The cold-blooded species need to migrate or hibernate in winter.

But tuna is one of the few warm-blooded fish species. Their body temperature can reach 34 to 36 degrees Celsius. In particular, there are a large number of blood vessel networks on the muscles and skin on both sides of the spine, making their metabolism particularly strong.

In this case, in order to better preserve heat, they like relatively high water temperatures and tropical environments.

Lu Zhizi continued: "The presence of this tuna around in winter means that there is hot water temperature around it, or in other words, there is a warm current here!"

Ao Muyang nodded: "You are right, I just discovered that there is a warm current here, so I built a fishery here."

Upon hearing this, Lu Zhizi snapped his fingers: "Yes, I remember that tuna has a habit. Although they will travel long distances in their lives, they can stay in a comfortable environment for a short time."

"They also have a habit, that is, they like to gather floating objects on the sea surface. We can take advantage of this habit to find if there are other tuna in the sea."

Ao Muyang asked: "What is the tendency of floating objects on the sea surface to gather?"

He didn't know this. He only knew the first half of what Lu Zhizi said, that tuna could stay in some environments for a short time.

For example, yellowfin tuna in the Pacific Ocean will swim to the edge of ocean islands with coral jungles during the day, and then go offshore at night. They will return here in the early morning, constantly migrating in an area of ​​​​the sea...

Lu Zhizi explained: "That's when tuna find something floating on the sea surface, such as wood, plastic fragments or buoys, and then they will gather in this place for a period of time."

"Do they still have this habit?" Ao Muyang heard this for the first time.

Lu Zhizi nodded: "Yes, the scientific explanation is that these floating objects make the sea surface full of three-dimensional space. The tuna swims next to these objects to find reference objects to determine the coordinates of its own voyage, so as to correct its navigation route. "

"It seems like this," she was not very sure. After thinking about it, she continued, "It should be right. When I was in Boston, some tuna fishermen would use this to lure tuna. They would artificially create floating objects on the sea surface to attract Tuna appears.”

There was already a network signal on the island, so Ao Muyang checked online and found that Lu Zhizi was right.

After the information was verified, Lu Zhizi came up with an idea: "Let's find the warm current waters in the ocean, and then create some floating objects near the warm current waters, maybe we can attract tuna to come."

This is a good idea. Ao Muyang immediately said: "I know the sea area where the warm current flows, so let's prepare floating objects."

Lu Zhizi said: "Don't hold your hopes too high. Maybe, as you said, the fish have already left here."

Ao Muyang was not worried about this, because he had seen the fish just half an hour ago.

It was very simple to make floating objects. He found some wooden boards and tied a buoy to them. He put them on the sea surface together with the raft and the fishing boat, making a large floating body.

The next step was to wait patiently. The wind was strong on the sea, so he asked Lu Zhizi to go back to the house to read and rest, and he waited on the fishing boat.

After Lu Zhizi left, he jumped into the water. The water was steamy and warm, which was really comfortable.

He equipped Tiger with a saddle. If there were tuna again, they would attack together.

In order to enhance the temptation of the floating object, he also tied a lot of squid, swimming crabs and fish meat around it. These were all food for tuna, which increased the temptation.

He had just finished soaking in the water and was busy when a motorboat suddenly drove over. He knew that Lu Zhizi should be on it, so he quickly jumped on board.

Lu Zhizi didn't ask him why he was still in the water, and said directly: "Mobile phone, Mr. Yan from the Blue Boatman is calling you, asking for your help! Pick up the phone, it hasn't been hung up yet!"

Ao Muyang quickly took the phone and asked: "Hello, Mr. Yan, has Zhu Zhu been kidnapped again?"

"No, Xiao Ao, come to the Municipal Hospital quickly, Zhu Zhu is sick, God! Come and save Zhu Zhu's life!"