In 1983, a small island started from a large farmer

Cultivating shrimp seedlings and cultivating high-quality shrimp seedlings are two completely different concepts, just like asking students to study and cultivating excellent students.

There were a lot of live shrimps in the two ponds, but after Li Duoyu checked them, he found that not many were suitable to be broodstock.

First of all, most of the shrimps were screened out based on their size. There were really not many usable broodstock left. Li Duoyu simply counted and found that there were less than fifty pairs.

For Li Duoyu, this is not enough. At least there must be more than a thousand pairs of broodstock.

Most of the species of sea shrimp in these two ponds are Chinese prawns, which are our local prawns, also known as "Qingdao prawns".

The male shrimps of this kind of shrimp are a little yellower in color, so fishermen often call them "yellow shrimps".

Adult individuals can reach a maximum height of about 15 centimeters and weigh about 40 grams. A dozen of them weigh one pound.

The female shrimp is a bit greener in color and is also called "big green shrimp" locally. It is much larger than the male shrimp. The largest individual can even reach nearly 20 centimeters and weighs about 90 grams. It is a veritable giant shrimp.

In his previous life, Li Duoyu could hardly buy local shrimps in the wet market. All the shrimps were imported vannamei shrimps.

In fact, it is not that shrimp farmers also worship foreigners. Li Duoyu once heard this from farmers on the island.

93 was the darkest year for shrimp farmers in Asia. At that time, a virus called "white spot syndrome" broke out.

This directly caused the shrimp farming industry in Asia to plummet to the bottom, and countless farmers directly lost their harvest that year.

This is a very scary shrimp disease. Infected shrimps will reduce or even stop eating, white spots will appear on the head and breastplate, and the body color of some diseased shrimps will turn red or fade.

Within 2 to 3 days after the onset of the disease, or within a week at most, the entire pond of shrimp will be completely wiped out, and there is no specific medicine to treat it.

Once you get sick, all you can do is clean the pond, and this terrible shrimp disease makes shrimp farmers no longer dare to try to raise shrimp easily.

At exactly this time, a type of white shrimp named White Penaeus vannamei, which was specifically pathogen-free (SPF), suddenly emerged and quickly occupied the market.

In layman's terms, it is a vaccinated shrimp. At this time, P. vannamei will not be easily infected with this white spot disease.

This has also caused the vast majority of farmers to abandon Chinese shrimp and turn to culture vannamei shrimp.

As far as breeding is concerned, Penaeus vannamei, which we have been working hard to upgrade, is definitely much easier to raise than Penaeus vannamei.

But when it comes to taste, Li Duoyu thinks Chinese prawns are more delicious than vannamei prawns, otherwise there would be no incident of Qingdao prawns costing 38 yuan each.

But for big shrimp eaters, even in 15, 38 yuan for real Qingdao prawns caught in the sea was not expensive as long as they were up to standard.

Because six or seven of them weigh almost a pound, and wild sea-caught prawns that big are really rare.

If it were alive, Li Duoyu would definitely be reluctant to sell it to others, and would definitely want to catch the broodstock for breeding.

Li Duoyu remembers very clearly that here on Dandan Island, this kind of wild prawns caught in the sea are also very expensive.

And because they are afraid of rip-offs, they generally do not sell them to ordinary tourists, but to fishmongers who specialize in purchasing them.

Just as Li Duoyu was classifying the Chinese prawns again, his uncle Chen Dongqing asked: "Duoyu, I remember that these prawns only spawn and reproduce in April and May. If you catch them at this time, is it too early?" ”

Li Duoyu smiled: "No, if you raise more animals at this time, you might be able to find out early whether these objects have any specific diseases. And as long as the shrimp eyes are cut off and the breeding temperature is raised, breeding can be achieved." Spawning is ahead of schedule.”

Chen Dongqing was a little surprised. He could understand the increase in water temperature. After all, in April and May, the sea water generally heated up.

But when the eyes of the shrimp were cut off, he was a little confused. "Why should the eyes of the shrimp be cut off?"

Li Duoyu frowned and accidentally mentioned some core technologies again, so he had to continue to pretend to be stupid and said:

"I'm not very sure, but the breeding experts on Hong Kong Island said that after the eyes are cut off and the female shrimp becomes blind, it won't be so selective when it comes to finding a partner."

Chen Dongqing frowned. It was 100% not what Duoyu said. It was easier to find a partner if you were blind.

"What else did they say besides that?"

Li Duoyu thought for a while and replied: "The rest, what they said is too professional, I can't understand it. It seems like some kind of X gland, destroying some organ that suppresses hormones."

After hearing this, Chen Dongqing suddenly realized that he remembered that he had seen such an article in a Dutch fishery magazine many years ago.

When the breeding environment of farmed broodstock is not ideal, there is an organ in the shrimp handle that releases growth-inhibiting hormones.

The female shrimp is allowed to delay growth and development, waiting for a better environment, and then stops releasing this hormone.

As long as this thing is destroyed, the female shrimp will not be restrained, and will quickly mate and lay eggs under the control of the urge to reproduce.

Chen Dongqing thought it was a theory, so he didn't pay attention. Unexpectedly, it was actually put into practice on Hong Kong Island.

That proved to be effective. Chen Dongqing quickly said: "Duoyu, you have to keep this technology a secret. Not many people in the country know about this technology."

Li Duoyu pretended to be surprised: "This technology is so powerful. I thought what they were willing to tell me must not be confidential."

Chen Dongqing was a little jealous. He looked at his nephew up and down. His face didn't look like a good person, but why were everyone so nice to him.

When he went to an island country, others taught him eel farming techniques. This time when he went to Hong Kong Island, others taught him such core techniques.

Could it be that some people are just lucky? Chen Dongqing couldn't help but sigh. Thinking about it carefully, Li Duoyu's luck seems to have been very good since he was a child.

"By the way, how to cut the eyes of shrimps? Do the breeding experts in Hong Kong have any demonstrations for you?"

"some."

Chen Dongqing said excitedly: "Then show me how to operate it and let me learn from it."

Li Duoyu smiled and rubbed his fingers: "If you want to learn, you can. Pay the tuition first."

Chen Dongqing originally wanted to scold Ganniang, but considering that Li Duoyu's mother-in-law was his sister, it turned into scolding his sister.

So, he changed his words and cursed: "Get out of here, sir, and show me how to operate it quickly. I might be able to help you improve it."

Li Duoyu half-squinted his eyes. In fact, the shrimp eyes were not cut with scissors, but burned with high temperature.

In previous lives, when people cut shrimp eyes, they used pliers that were very similar to the hemostats used by doctors to suture.

In this day and age, such pliers are not easy to buy, and they are definitely not available from supply and marketing cooperatives.

Fortunately, Li Duoyu was familiar with Zhang Defa's family. After a brief greeting, he got the hemostatic forceps from the health station.

In addition to the hemostatic forceps, Li Duoyu also brought the alcohol lamp.

After arriving at the eel factory, Li Duoyu lit the alcohol lamp, and then placed the head of the hemostat on the flame of the lamp to burn.

Immediately afterwards, a lucky female shrimp was fished out of the pond.

It is actually very simple to judge male and female shrimps, just look at their first pair of shrimp legs.

If there is nothing between the first pair of shrimp legs, it is a female shrimp. If there are two small sticks, it is a male shrimp.

Of course, some fishermen can also judge by color and body size. The first pair of shrimp legs Li Duoyu caught did not have small sticks.

Li Duoyu quickly grabbed the whole shrimp, then picked up the red-hot hemostat and pinched one of the shrimp's eyes.

As a slight white smoke rose, the shrimp's eyes were cut off by the red-hot hemostat instead of being cut off.

This method can not only seal the wound with high temperature, but also greatly reduce the infection rate of the shrimp, thus improving the survival rate of these broodstock.

Li Duoyu also heard that ruthless farmers would cut off both eyes of female shrimps. In that case.

Female shrimps cannot suppress hormones and will shed their shells very quickly, then mature and completely become a fertility machine.

Just cutting off both eyes will double the probability of death of the female shrimp. Unless there are special circumstances, no farmer is willing to take this risk.

After all, most broodstock are imported and very expensive. Even broodstock bred in domestic shrimp farms are not necessarily cheap.

Chen Dongqing, who was watching from the side, frowned the whole time. Logically speaking, his nephew was also a new learner.

But after this set of operations, there is a sense of smoothness and flow, giving people a sense of disobedience, as if it had been done frequently before.

In fact, this feeling of dissonance had been present for a long time, since the first time his nephew came to see him at the Fisheries Research Institute.

Chen Dongqing has always felt that there is something wrong with this nephew and that he is a bit too smart.

He gave a thumbs up and couldn't help but say: "With your skills, you can become a doctor."

Li Duoyu smiled and said, "How is that possible?"

The uncle continued: "By the way, there is good news that I almost forgot to tell you. The cooperation between the research institute and your company can probably continue again."

Li Duoyu was a little surprised: "What should I say? Didn't it stop immediately last year? Why did it start again this year?"

The uncle looked around and said:

"I also heard from people that Zhang Xianxian, who has always been at odds with us, seems to have been in bad luck recently. Not only was he criticized by the top leaders in the county, but as far as I know, he had to write a "Why? Termination of Fisheries Research Institute and Minlong Fisheries Cooperation" report, and in the past two days, I was called to the city for a meeting."

"I also heard what Director Zhang said. If he fails to give a satisfactory answer to the superiors on this matter, he is likely to be transferred from outside."

Li Duoyu snorted coldly: "For external transfer, this kind of person should be kicked out directly. He uses chicken feathers as arrows all day long and makes everyone crazy."

Uncle Chen Dongqing looked at Li Duoyu with a smile: "There is also a rumor in the county now that someone happened to be on a business trip with the big boss. As soon as he left, he was called in for a talk. What a coincidence. "

Li Duoyu looked confused:

"It's none of my business. I don't have any merits. The only thing I'm really good about is that I don't like to gossip behind my back. If he jumps like that, I guess the organization has already targeted him..."

However, Li Duoyu was really right this time, and the matter was not entirely related to him. It was one thing for Zhang Xian to write a report.

Being called to the city for a talk was another matter, related to the resurgence of smuggling last year and the rise of smuggling cases in the past two years.

My uncle Chen Dongqing stayed at the eel factory for almost the whole morning. After having lunch, he returned to the county town.

He planned to go back and look through the magazines to see if there were any reports or introductions comparable to prawn eye-cutting.

Li Duoyu used the loudspeaker in the village to shout: "Hello everyone, villagers. I am the village director Li Duoyu. Please listen carefully. Minlong Company is planning to purchase prawns. As long as they are large, they must It's alive and jumping around."

When the villagers on Dandan Island heard Li Duoyu's broadcast, they all dropped what they were doing, because every time Li Duoyu personally broadcasted, there was 100% chance of a big money-making project.

There were a few children at the pier who were particularly noisy. Lao Lu, who had just returned from fishing, said fiercely on the spot: "If you make any more noise, I will throw them into the sea. Listen carefully to the village director's broadcast."