What aspects should be paid attention to in bream farming to effectively improve the survival rate?

Farmers do not pay much attention to the quality of feed during the feeding process. If the feed is spoiled and moldy, the anchovies will be infected after eating, affecting other anchovies, causing large-scale infection, which is extremely unfavorable to anchovy farming. Therefore, when feeding, you must pay attention to the quality of feed, and don't be greedy for small gains.

Once you notice that the feed is moldy, do not continue to feed it. Farmed anchovies are excellent multi-layer cultured species, and many farmers often use drugs to increase resistance. However, anchovies can have adverse effects if the drug is overused.

Farmers must pay attention to the dosage of drugs in the breeding process to achieve the control effect. However, the standard of each drug is different, and it should be used according to the instructions and the actual situation.

Squid is highly adaptable and is farmed in both the north and south. Many farmers often have poor control over water quality. If the squid grows in an environment with poor water quality for a long time and does not grow well, it is susceptible to diseases.

In order to avoid this, it is necessary to do a good job of water quality control on a regular basis. The device can be placed in the water to monitor the water quality in real time. Once the water quality is found to be poor, it should be adjusted in time.

After the disease was resolved, the health of the anchovy was still relatively weak, and the germs in the water were not completely removed. If it is not handled properly at this time, there is a high risk of reinfection, and it is difficult to prevent and control when it occurs.

When raising anchovies, it is also necessary to choose the right feed, and generally can use energy feed and protein feed. Among them, energy feed includes wheat, corn, wheat bran and other processed grains, and protein feed includes egg yolk, animal offal, small fish and shrimp, bone meal, etc. , and pay attention to the amount of feeding when feeding, so as not to die of anchovies after eating too much feed.

In the later management, it is necessary to disinfect the breeding environment of anchovies regularly, and it is best to sprinkle an appropriate amount of quicklime into the pond every other week. In the process of breeding, it is also necessary to regularly clean up the growth environment of anchovy to prevent the excrement of anchovy from fermenting in the water, which will eventually produce harmful gases and affect the normal growth of anchovy.

It is necessary to choose the right place to breed anchovies. Generally, abandoned ponds can be used to breed anchovies, and the place selected must be close to an unpolluted water source with good water quality, so that anchovies can grow better. After selecting the pond, all the debris in the pond should be cleaned up, and then the pond should be disinfected and the water source should be introduced.

It is necessary to pay attention to the quality of feed, do not choose spoiled and moldy feed, select excellent varieties after multi-layer cultivation, choose varieties with strong drug resistance, control water quality, and let fish grow in an environment with good water quality.

To understand some knowledge and skills of fish farming, but also to choose some better feed to feed, should be fed these fish feed every day, so as to ensure that the survival rate can be improved, and for a long time this can also ensure that the fish grow better and better.

When breeding, it is necessary to provide them with a suitable temperature environment, and they also need to prepare some feed, the quality is better, and they need to be cleaned regularly, sterilized and sterilized, so that they can live well and finally improve the survival rate.

Many farmers in the feeding process, do not pay much attention to the quality of feed, if the feed is spoiled and mildew, bream will be infected with disease after eating, which will affect other bream, resulting in a large area of infection, which is extremely unfavorable for bream farming. Therefore, we must pay attention to the quality of the feed when feeding, do not be greedy for a small bargain, once the feed is found to be mildew, it is not suitable to continue feeding.

When choosing to build a fish pond, you should find a place that is far away from the factory and has a lot of water, and when choosing fish fry, you should choose a fish that is relatively healthy, and there is no wound on the surface, and it is best to have fish of about the same size, and you should also change the water in time to provide sufficient oxygen.

1. If you want to breed excellent bream, you must start from the selection of fish ponds and places with sufficient water sources. The size of the fish pond is best more than two acres, the water depth is from meters to 3 meters, and the bottom of the pond is required to be exposed to the sun and cracked in winter, and there should not be too much silt in the pond. The most important thing is not to have sewage discharged, ten days before the water into the pond, to splash the pond with quicklime for disinfection, 50 pounds of quicklime per mu, and then drain into the pond after ten days of exposure.

2. The stocking time of bream is generally put before and after Qingming, and the place where the weather is colder is best to put the fry after Qingming. In the selection of fry, it is required that there are no wounds and flaws, and try to choose healthy and strong fry, and the body size is better than two fingers. Cultured bream is generally in the form of polyculture, such as silver carp, bighead carp, grass carp, herring, crucian carp, tilapia, etc., together with polyculture helps bream to be active, about 200 bream per mu, if the main bream is raised, 500-800 per mu.

3. The water quality requirements of cultured bream are generally the same as those of the four major carp, the transparency of the water is kept at 25-30 cm, and the pH value of the water quality is between. The peak season for bream is between June and September, so it is necessary to pay attention to changing the water, observe the weather changes, and properly install the aerator equipment. If it is rainy, windless, and sultry weather, you should turn on the oxygen every morning, get up in the morning to see the emotion of the fish, and find that the fish float head is hypoxic and should be filled with water and oxygenation in time.

4. Bream and grass carp have the same feeding habits, are grass-based or artificially prepared feed, feed twice a day, grass feeding is generally recommended duckweed, duckweed is small and tender, bream likes to eat very much. It can also be fed with peanut bran, wheat bran and corn flour and other artificially made pellet feed, feeding should be timed and fixed, so that the fish are full.

5. In rural aquaculture, water quality disinfection is not used, because their breeding density is small, there is no disease, and the fish are put in, and they are fed until they grow up, and basically do not use any drugs to disinfect. If it is a farming, it is best to disinfect the water quality of the fish pond when you are free, disinfect it once for more than a month, use 20 pounds of quicklime per mu, and splash the whole fish pond with lime water. Quicklime has the effect of sterilization, treatment and prevention, and can purify water quality, prevent fish from getting sick, reduce the saltiness and acidity of water quality, and have a certain help to the growth of fish bodies.

How do you put a large number of dead people? Selling fish has become a top priority for farmers, and it is one thing that can be saved. Some of them are quite cold, and the impact is severe?

Fish can only be bought cheaply, 8 yuan catty, 10 catties? Fish 80 yuan. If it's a freshly dead fish, it might sell for 12 yuan per kilogram.

A month ago, it weighed 10 pounds? The price of the fish with the removal of the swim bladder is 10 to 12 yuan per kilogram, and one swim bladder of two sizes can be sold for 100 yuan, and a swim bladder of two sizes can be sold for 130 yuan. Today's farmers lose at least 100 yuan for every fish they sell.

But even if it's cheap, it doesn't mean it can be sold. Due to the large amount? Fish flooded the market, and many fish were unsalable.

There are few local processing plants, so you can only buy a few? Fish, but very picky about quality, is then sold to some local freezers, which are supposed to be relatively fresh, and stale fish can only be handled by the farmers themselves.

The leaders of the Raoping Oceanic and Fishery Bureau led the staff to go to the front line again to understand the progress of disaster relief and resumption of production, accompanied by reporters from the Oceanic and Fisheries Bureau. The first time I came to Raoping Shunchuang Aquatic Products ****, I saw that the forklifts coming out of Zhelin Bay Fishing Port were constantly frozen to death by frozen baskets? The fish was transported to the processing workshop, and more than 30 workers were quickly cutting the fish into strips.

Wash the fish, simply pack it in a plastic bag, and put it in a quick-freezer box to freeze it. Some specifications are more than ten pounds? The fish was singled out and set aside, and two workers were skillfully cutting the stomach to extract the gum.

Still frozen on the other side of the factory? The fish has been put into cardboard boxes built a wall high and will be sent to the refrigerator for refrigeration.

Huang, chairman of Shunchuang Aquatic Products, said that Shunchuang is an aquatic product processing and circulation enterprise specializing in marine quick-frozen products. The main products are quick-frozen hairtail, sardines, mackerel, four-minced fish, etc. as well as cooked food processing, various fish feeds, etc.

Fish acquisition and processing is not one of the company's businesses. Due to this serious disaster, countless frozen fish died, and the market could not digest it for a while, and the farmers were helpless. Raoping County Ocean and Fishery Bureau actively communicated with him, and the leaders of Raoping County Ocean and Fisheries Bureau also specially called him; Later, he also received a WeChat message from the leader of Raoping County, asking the refrigeration enterprises in Raoping County to quickly set off an action to purchase dead and injured fish.

Shunchuang decided to buy local frostbite at the market price of 5-8 yuan? Fish. For the harvest?

More than 200 employees of the company were involved in the battle, and some employees were hired to work overtime. As of January 27, a total of acquisitions? More than 100,000 catties of fish, all settled in the spot.

Huang told reporters about the acquisition of marine and fishery? The fish are answering the call of ** and trying their best to help the fishermen. At present, it is only a simple package freezing, and it is too late to think about future sales and processing methods.

He is also actively seeking other avenues, such as posting fish information on WeChat circles and calling on other companies to join the rescue. While the first and processing enterprises are helping to fight the disaster, farmers are doing their best to save themselves. There are more than 50 members in Raoping County, Guangdong, and more than 400 cages are cultivated, mainly breeding gentian, pearl grass, grouper, pomfret and other high-value fish.

During the cold wave, temperature measurements by members of the cooperative at noon showed that the lowest water temperature was only 10 degrees, and these farmed groupers would not survive if the water temperature fell below 14 degrees for more than three days.

In terms of water temperature, the constant temperature is 26-29 degrees Celsius (except for some varieties), and the temperature difference between chillers and heating pipes should not be more than 2 degrees per day. The pH level should be kept between them, and too much acid or alkali will also affect the health of the catfish. The nitrate (NO3) content is kept below 50 ppm, and if the nitrate content is too high, it will increase the pressure of the catfish, greatly reduce the appetite, and also shorten the life span of the fish.

The redox value should be stable above 250mV, and should not fluctuate drastically.

1.Water management. It is necessary to constantly replace the immovable water in it, twice a day during the high temperature season, and inject water quality improvers regularly.

2.Regularly disinfect the pool, tools, seedlings, etc. 3.

Avoid emergency responses and do not make large noises in the vicinity of the farm. 4.It is necessary to ensure the safety and nutrition of the bait.

5.Povidone-iodine solution and other disinfectants are used for disinfection to prevent fish diseases.

The market demand for catfish is very large, and the nutritional value is very high, in the artificial breeding of catfish to constantly replace the pool of immovable water, to regularly disinfect, the amount of bait should be appropriate, not too much, to ensure the safety of feed.

Precautions: First, the environment requires that the pool water should be constantly replaced without moving the water; Second, disinfection, the pool, tools, seedlings, bait, etc. should be disinfected regularly; Third, avoid stress, do not cause particularly large movement near the breeding room; Fourth, disease prevention, investment in auxiliary drugs for targeted protection.

Many people have seen fish spawning, but few people have paid attention to the number of fish spawning at a time, and the general feeling is that the number is large. Generally speaking, where there is less protection for eggs, the loss is large, the survival rate of juveniles is not high, and the number of eggs laid is large; Conversely, fish with protective habits spawn less. For example, the spiny fish only produces 80-100 grains; Trout produce 200-300 grains; The silver carp can produce 500,000 grains; grass carp produced 400,000 grains; eels can produce 10 million seeds; Sunfish (300 million eggs), fathead fish (500,000 eggs), yellow croaker (300,000 eggs).

Fish spawn in large numbers in order to increase the number of surviving offspring and to spread the maternal genes as widely as possible.

In general, if the size of the egg is larger, the resulting pup will also be larger, so that the pup has a higher survivability. But why don't many fish concentrate their reproductive investments and produce as many eggs as possible to ensure the survival of their offspring?

The size and quantity of fish spawning are the best patterns in the process of reproduction over generations, and in the course of evolutionary development. Organisms need to spread their genes as widely as possible, and for species with strong spawning ability, if the size of the eggs is large, the number will be too small, and even if the survival rate of the offspring is high, it is not cost-effective, but the size of the eggs is too small, and the survival rate is too low. Therefore, they must find the best choice between the size and number of eggs to ensure that the maximum number of offspring survives.

This optimal size of eggs is most conducive to reproduction and to spread their genes widely.

Trout are very easy to raise, as long as the water is clean, it is basically fine.