After Song Qiumin called her mother's family over, she gave money according to the dividends, she is not a person who does not value money very much, plus her brother and sister-in-law are also simple fishermen, the two sides discussed it, settled the accounts every month, and removed the expenses She and her brother's family split the accounts four or six times.

A few people at the wine table talked a lot and ate a lot, wild vegetables in spring are the most delicious, and Ao Muyang loosened the belt buckle twice.

The seafood roll can be used as a dish and as a meal, this is baked with oil, there is the fresh fragrance of shrimp and crab in the mouth, the fragrance of the shepherd's cabbage, and the fragrance of peanut oil, plus the shepherd's cabbage is still tender at this time, it is indeed delicious.

In particular, this kind of wild vegetable roll can be dipped in garlic and eaten, the garlic is appetizing, and Lao Ao is happy to eat it.

What made him even happier was that the Dragon's Head came back and caught a lot of sardines.

Once a year, the season of hunting sardines is coming again.

However, happiness begets sorrow.

After Lao Ao was happy for a few days, something happened to him that made him very unhappy.

He had just gotten up early that morning, and then the general pulled his way on the door and screamed.

Inexplicably, Ao Muyang suddenly thought of Sun Beilong, he heard the general call like this, and felt that Sun Beilong had come to the door again.

As a result, he went over and opened the door to take a look, and found that it was the second light knocking on the door.

Seeing this, he breathed a sigh of relief, and asked angrily, "When are you coming back here?"

Since the last time it was found out that Erdeng colluded with outsiders to frame him, he had no good impression of Erdeng at all, and the attitude of the village was the same as him, and he was nose and eyes to Erdeng, Erdeng was a little eyesight, and then he went to live upstairs in the county.

But when he returned to the village during the Chinese New Year, Ao Muyang knew, but pretended not to know, he was too lazy to see this thing.

Erdeng drooped his eyelids and said: "That, isn't this almost the Qingming Festival? I can't come back to sweep the grave of my father? Not the village chief, this is not important, I have something important to tell you, the blood of the dragon king came out of the sea, I saw it when I went to repair the ship in the morning, and I came to you to report this matter to you." ”

Ao Muyang was stunned, and subconsciously asked: "The blood of the Dragon King is coming out of the sea? Why didn't you receive the news introduction, and this thing suddenly appeared?"

Dragon King Blood is a common name, but it is actually a red tide.

The formation of red tides has existed since ancient times, but in ancient times, local fishermen did not know the cause of the formation of red tides, and they saw that the sea water turned red and a large number of fish and shrimp died, which was regarded as the blood of the dragon's injury.

In addition, the current red tide is often caused by the abundance of seawater and the explosive reproduction of plankton, but in ancient times, the marine pollution was light, and most of them appeared after natural disasters such as tsunamis and hurricanes.

These natural disasters have caused drastic fluctuations in the sea water and the accumulation of plankton in the sea, which in turn has allowed seaweed to flourish.

How did the ancient fishermen understand this truth? They thought that there was an evil dragon fighting in the sea, which led to the natural disaster, and the result of the struggle was that the evil dragon was injured and bled out, and then the dragon's blood stained the sea red.

Knowing the formation of red tide, Ao Muyang hurriedly went to the beach to check, there are manatees, turtles, dolphins, etc. living in the sea outside the village, they either eat seaweed or fish and shrimp, once the red tide occurs, it has a great impact on them.

Many red tide creatures secrete red tide toxin, which is 80 times more toxic than cobra toxin and 100,000 times stronger than ordinary anesthetics such as procaine and cocaine.

Common red tide toxins include paralytic shellfish poisoning, diarrheal shellfish poisoning, nervous shellfish poisoning, memory loss shellfish poisoning, and siga fish poisoning, among which paralytic shellfish poisoning is the most widely distributed and most harmful type of toxin in the world.

When fish and shellfish are in toxic red tide areas, they ingest these poisonous organisms, and although they cannot be poisoned, they can accumulate in the body.

In this way, if poisonous fish, shrimp and shellfish are accidentally eaten by people, dolphins and turtles, it is easy to cause poisoning of the body, and in severe cases, it can lead to death.

Sure enough, when he went to the beach, he took a closer look and saw that the sea was secretly red.

Ao Muyang knows that the long-term dissipation process of red tide can be roughly divided into four stages: initiation, development, maintenance and extinction, the initial stage is that there are a certain number of red tide organisms in the sea area, and the various physical and chemical conditions of the water environment at this time are basically suitable for the growth and reproduction of certain red tide organisms.

However, the color change of the sea water in the initial stage is not visible, and as long as the color change appears, it will at least enter the development stage.

Ao Muyang hurriedly called Ao Daoguo and asked him to take someone out to open a boat and cast nets to catch these seaweeds to see the situation.

Erdeng volunteered: "Village chief, my boat is so good, I just repaired it." ”

"No, I don't have to. "Lao Ao is very annoyed with him, Made, the cheating man, he didn't cheat as the village chief and the richest man in the village, why does this grandson dare to cheat?

Ao Daodao drove his own boat, cast a small eye fishing net and swept it on the sea, Ao Muyang squatted on the dock and thought hard about countermeasures.

The phytoplankton that cause red tides to occur are mostly single-celled plants, of which dinoflagellate is the most, as well as diatoms, green algae, cyanobacteria, golden algae, etc., these phytoplankton are small on their own, and they have to be seen with a microscope, but they can be caught after being together.

The nets were dragged around the surface of the sea and put away, and they were full of small seaweed of different shapes, which were scattered with a pinch of the hand.

Ao Muyang smelled the smell, there was no smell, and it was indeed early now.

He called Dai Zongxi and told him about the discovery of the red tide.

Red tide is a catastrophe for the fishing industry, which can destroy the ecological balance, because the red tide organisms are too small, they can accumulate in the gills of fish, so that the fish suffocate and die due to lack of oxygen;

Hearing his words, Dai Zongxi was a little puzzled: "It's still early March, how can there be a red tide?"

Red tides occur most often in May and June, followed by April and August, and March is indeed rare.

Ao Muyang said helplessly: "It depends on your official research to give the results, I think it may be related to the warm winter in the past." ”

Just now, he searched on the Internet, and there are many reasons for the formation of red tides, the cause is seawater pollution, seawater eutrophication is the material basis and primary condition for the occurrence of red tides, and the changes in hydrometeorological and seawater physical and chemical factors are important reasons for the occurrence of red tides.

Among them, oceanographic experts have found that there is a precursor to the occurrence of red tides, that is, the water temperature suddenly rises more than 2 degrees Celsius in a week.

Lao Ao has thought about it, this year is a warm winter and a warm spring, the spring temperature rises quickly, the sun is very good these days, and the sea temperature may rise quickly.

However, what made him desperate was that the water on their side was the clearest and least polluted, but why did the red tide occur here first?