Chapter 432: Stinking Before Dying (1/2)

Chapter 432: Stinking before dying

Eel factory.

Seeing his brother-in-law's nervous and anxious look, Li Duoyu didn't ask and rushed directly to the pond.

Seeing this, his second brother Li Yaoguo also came over. Chen Wenchao immediately said, "Xiaolan, help me collect the fish, I'll go and see too."

Li Duoyu glared at him on the spot: "Collect your cloves well, don't worry about other things."

Li Duoyu currently has five ponds, totaling about 100 acres.

There are about 2,000 blue crab seedlings per acre. In this 100 acres, Li Duoyu has released nearly 200,000 blue crab seedlings in total.

Most of these blue crab seedlings were caught by Zhao Erniu, and he earned nearly 2,000 yuan in total.

The breeding area and quantity like his are definitely not big, and it can't be compared with Taizhou, but it's not small either.

On the way here, brother-in-law Zhang Mingsheng was full of self-blame: "I just didn't pay attention for two days, and so many died."

Li Duoyu patted his shoulder: "It's a small matter. In aquaculture, there are always deaths."

"I feel that each one is about 30-40 grams. Even if it is calculated at 50 cents per pound, it is a loss of several thousand."

Some of them have eight claws facing the sky, and they are already dead. Li Duoyu's intuition tells him that the blue crabs in these two ponds are probably finished.

Every one of these living blue crabs by the pond looks sick, and some of them are propped up, as if they dare not touch the water.

When blue crabs are just hatched, they are like water fleas, very small, and you can't see them at all if you don't look carefully.

"Yeah."

Looking at the blue crab propping up its feet and blowing bubbles, Li Duoyu has roughly guessed what the problem is.

The main thing is that when Li Duoyu caught them in the mangroves, they had already experienced a long "perverted" career.

"Duoyu, at least several thousand crabs died in this pond."

Besides, they are bottom dwellers, so after they die, they just rot down there. In many cases, even if they are all dead, you don't know.

Li Duoyu sighed. In fact, he wanted to tell his brother that he was too conservative. How could only a few thousand crabs die? It should be far more than that.

Li Duoyu also carefully observed the pond and found that the situation was really serious. A large number of blue crabs appeared around the pond.

Because he had never seen dead crabs, he thought he had raised them very well and boasted about it everywhere. As a result, when it came to harvest, he caught one or two hundred blue crabs in dozens of acres of ponds.

They have to go through six stages of growth in the form of Daphnia before they become "airplane seedlings" or megalopa larvae.

In aquaculture, the breeding cycle of blue crabs is relatively short. From juvenile crabs to adult crabs, it takes about 100 days.

And after the megalopa larvae "metamorphose", they will grow into the appearance of crabs.

They stink before they die.

Most of the blue crabs that have died so far have molted 11 or 12 times, and many are about to start molting for reproduction.

Blue crabs are famous for not being seen even when they die.

It's not that blue crabs grow very fast.

"No, the problems are the two we caught at the beginning."

The crab shells are already more than ten centimeters wide, and some of them grow faster and even weigh more than half a pound.

The blue crabs in the first pond have been raised for more than two months, and most of them are now three or four taels.

Seeing that his brother-in-law kept saying that many of them died, Li Duoyu frowned and asked, "Could it be that all five ponds have problems?"

For farmers, it is normal to see dead crabs. If you don't see dead crabs for a long time, it would be terrifying.

"As long as they are not all wiped out, it's fine." Li Duoyu was a little relieved. If there is no collective problem, it should not be a problem with the water body, but may be other reasons.

Almost every time the blue crabs molt, they can gain 70% of their weight.

Li Duoyu slid to the edge of the pond and picked up two blue crabs that were not dead, and two blue crabs that were dying.

"There are really many dead ones."

There used to be a fish farmer in their town, who changed his career and went to raise blue crabs.

However, the sudden appearance of a large number of dead crabs like this means that the situation is already very serious and we must be prepared to clean the pond.

Blue crabs will undergo 13 molts in their lifetime, including 6 larval metamorphosis molts, 6 growth molts, and 1 reproductive molt.

Li Duoyu checked the water body and found that there were no major problems, no algae blooms, and no stinky ponds.

There were two wooden barrels on the bamboo raft, which seemed to be full.

Li Duoyu suddenly remembered the self-deprecation of some blue crab farmers: it is quite respectful to still see dead crabs, at least it can prove that there are still crabs in the crab pond that have not died.

But those dead crabs are really smelly, and Li Duoyu found that those dying blue crabs also have a bad smell.

As long as they have gone through this molting, the blue crabs are considered mature. During this time, female crabs that have not yet mated are called juvenile crabs.

But blue crabs are different. Not only will they kill each other, but when the breeding density is high, they will even eat their own kind while they are molting.

Li Yaoguo, who came with them, looked at the whole pond of dead crabs and felt distressed.

Under normal circumstances, blue crabs cannot be seen in broad daylight, but they climbed up the slope of the shore during the day.

When they arrived at the first pond, Li Duoyu found that his father was paddling a bamboo raft on one side of the pond, holding a scoop net in one hand to catch the dead crabs.

After the fish died, they would float on the water surface, telling you that they are dead.

I broke open its crab shell on the spot, and sure enough, there was a lot of fluid inside.

Under normal circumstances, the liquid is transparent and sweet, but this one is yellow and smelly, and it is obvious that it is sick.

After Li Duoyu broke the crab claws, light yellow liquid also flowed out, and the crab's gills had turned black.

Yellow water disease + black gill disease!

If it suffers from enteritis or something like that, Li Duoyu can still use Chinese herbal medicine to treat it.

But the blue crab suffers from these two diseases at the same time, and even the gods can't solve it.

Li Duoyu is a little difficult to understand. This time, the blue crab farming is almost in accordance with the highest standards.

There is definitely no problem with the feed. The best snails and shellfish are used.

The water quality seems to be fine. Which link is wrong, which led to the death of a large number of blue crabs.

Li Duoyu knows what disease it has, but what caused it is still unknown, so he can only check it one by one.

Li Duoyu asked, "Brother-in-law, have you changed the water recently?" Zhang Mingsheng said, "Yes, as you said, change it every three days, and change one-third each time."

Isn't that strange?

With this frequency of water changes, there must be no problem with the water quality. There is no reason for this situation to occur.

In the past, when he encountered such a problem that even he couldn't solve, he could only ask a crab expert, but where can we find experts in this era.

He is the expert.

Li Duoyu glanced at Lao Li who was still fishing for dead crabs, and suddenly asked, "Brother-in-law, who has been raising blue crabs recently?"

"Recently, my father has been raising them."

Li Duoyu was stunned for a moment. For some reason, he had a hunch that the problem might be with my father.

He took a long shovel and came to the place where shellfish feed was often fed in the pond, and shoveled up some silt at the bottom.

It was found that the silt was very smelly, and there were many worms crawling on it. Most importantly, he found some small fish that were eaten until only their heads were left.

Li Duoyu simply sorted it out and roughly knew where the problem was.

Although my brother-in-law has been changing the water, and because of the mangroves, the water body seems to be fine, but there is a problem at the bottom.

To raise fish, you must first raise the water.

But to raise crabs, you must first raise the bottom.

After all, crabs are benthic organisms. Once there is a problem below, no matter how good the water above is, it will be useless.

It is estimated that this situation has lasted for a long time. In addition, the temperature difference has been relatively large recently, and the resistance of blue crabs has weakened, so this is the outbreak.

At this time, Lao Li paddled over on a bamboo raft. He caught a whole bucket of dead crabs and looked at Li Duoyu with a little anger.

"Blue crabs are not raised well, and they just run around all day. Look at so many crabs that have died. How much money have you lost."

Li Duoyu scratched his head.

"Dad, failure is the mother of success. I am not a god. If I succeed in raising them casually, others will probably think I am a monster."

Lao Li snorted coldly.

"Then you should raise less. There's no need to raise so many."

"Hehehe."

After Li Duoyu returned to the shore, his second brother Li Yaoguo asked, "Have you found the reason?"

Li Duoyu shook his head and did not tell everyone about the small fish feed he found in his food.

"I really don't understand this time. Next, let my father stop feeding the blue crabs. Let me feed them myself and see if I can find out the reason."

The second brother Li Yaoguo sighed. He found that the road of breeding is really difficult.

Even the best kelp, only Duoyu can raise it well and meet the export standards.

The other villages in the town are also average, and they can't even meet the export standards.

However, compared with blue crab and eel farming, kelp farming is simply a fairy project, except that a lot of manpower is required when clipping and collecting kelp.

The rest of the time is really worry-free, and it won't die like eels and blue crabs.

This scene reminded him of the scene of catching half a pond of eel fry some time ago.

Li Yaoguo couldn't help asking, "Duoyu, which one is easier to raise, eels or blue crabs?"

Li Duoyu pondered for a while and replied, "If eels have a complete set of mature breeding technology, then eels are easier to raise."

Li Yaoguo was surprised and said, "What if blue crabs also have a complete set of mature breeding technology?"

Li Duoyu smiled.

"It's hard to say about this. Anyway, I'm not sure."

"More uncertain than eels?"

Li Duoyu nodded, "Blue crabs have too many uncontrollable factors because they need to molt."

In the previous life, there were eel experts who controlled the mortality rate of eels to less than 1%, but even if they were good at raising blue crabs, no one dared to brag about this.

This time, Li Duoyu invested a total of 200,000 blue crab seedlings. If there were 20,000 blue crabs in the final harvest, he would be quite satisfied.

Brother-in-law Zhang Mingsheng frowned. He built this pond and he also had shares in the blue crabs, so he always paid close attention to these blue crabs.

He would place traps every week to check the latest changes of the blue crabs. It can be said that he was very excited every time he checked.

Because the blue crabs would grow a circle every time, and he was really happy to see that the blue crabs had grown to half a pound in less than two months.

But he didn't expect that it would become like this in just a few days. He also blamed himself very much because he had been busy with the sixth pond enclosure in the past few days and ignored this.

"If the mortality rate of blue crabs is so high, wouldn't we lose a lot of money to build this dike?"

Li Duoyu smiled and said, "It won't be a loss. Once the pond is built, it will be very profitable. Besides, our pond is not only for raising blue crabs, we can also use it to raise shrimps."

When they heard about raising shrimps, the second brother Li Yaoguo and his brother-in-law Zhang Mingsheng's eyes widened.

Shrimp is definitely a luxury these days. A pound of blue crabs is only one dollar at most, but a pound of shrimp can be sold for at least four or five dollars.

Li Yaoguo was surprised and said, "Duoyu, can you raise shrimps?"

Li Duoyu scratched his head and then stretched out his little finger, "I am not talented, I only know this little bit."

Li Yaoguo is a little used to it now. Every time Li Duoyu said that he could only do a little bit, he must be lying.

But thinking about the large number of shrimps that die every time they are raised, Li Yaoguo couldn't help but ask: "Duoyu, which one is easier to raise, shrimp or crab?"

Li Duoyu thought seriously: "Theoretically, shrimps should be easier to raise than crabs."

"How about eels?"

Li Duoyu frowned and said: "Personally, eels may be the easiest to raise."

"I understand."