Ask for help in sturgeon and rainbow trout farming who knows about this

Sturgeon and trout should not be polycultured.

1. Sturgeon is also a cold-water fish with a mild nature.

2. It is best to keep the golden trout alone, because he is a cold-water fish and fierce.

3. If the sturgeon can not eat the bait together, such long-term breeding will affect the growth of the sturgeon.

Sturgeon is a demersal fish, very narrow diet, is a carnivorous fish, mainly feeds on some small or slow-moving benthic animals in the river, mainly feeds on fish in the ocean, followed by crustaceans, and less molluscs. Juvenile Chinese sturgeon in the estuary area mainly feed on demersal fish such as snakes and pupa, as well as scale shrimp and clams, and generally stop feeding during the spawning period.

Trout usually inhabit fresh water and prefer to live in cold water, 16 to 18 degrees is the most appropriate, 16 to 23 degrees will reduce their desire and ability to breed or prey, and above 23 degrees it will be fatal. Several swim into the sea during the breeding season. Trout and salmon have the same order and family and are closely related.

Many places place great emphasis on captive breeding and rearing of trout. The mouth is in the terminal position, the mouth is clefted, and it is arcuate. The lips are thick, and there are 2 pairs of inconspicuous short whiskers on both sides of the upper jaw and blunt snouts.

Trout mainly belong to two genera, salmon and char. The salmon genus includes salmon and several species of trout, and the genus Charpent includes several species of trout that can also be called char. The main difference between these two species of trout is that they have different shapes of their bodies, vomeras and teeth.

Charpent trout have red or creamy spots on their darker skin tones. The ten-boat shape of the char is not straight.

The water quality in the mountainous area is good, and it is best to raise ** fish, and the four big fish are purchased in batches, and then the live water ** can be sold for several times the price. The difficulty of breeding is low, the cost is low, and the sales volume is good. Rainbow trout is easy to raise, and there are many rainbow trout in the tourist area of Huairou District, Beijing, and it has become a local specialty delicacy.

In mountainous areas, rainbow trout especially have high water quality as the living conditions, and the pollution-free environment of natural water has created a natural growth environment for rainbow trout.

As long as the water source is good and the amount of water is large, a stepped fish pond is built, trout is raised on the head, and sturgeon is raised in the water, because trout has higher water quality requirements than sturgeon, and the requirement is that there must be flowing water, so that the oxygen content of the water will not be low. Cold-water fish like to swim backwards, so the amount of water must be large. The particle size of the feed will not only affect the amount of food eaten by rainbow trout but also affect their taste, and will also have a great impact on the digestion and intestines of rainbow trout, so we must pay attention to the size of the fish at each stage of growth when feeding granular feed, and feed some feed suitable for them. It will not allow the fish to eat better feed and waste it, and it will also settle to the bottom of the pond in the future, which will not only increase the amount of feed we put in, but also pollute the entire ecological environment, and rainbow trout also have very high requirements for the amount of oxygen in the water. But remember not to use ice water to cool down, because this has a very serious impact on the growth of the fish, in the winter when the temperature is very low, we also need to do a good job of keeping the pond warm, if the water temperature is too low, the growth of trout will be seriously hindered.

Crustaceans, small fish and shrimp, tadpoles and terrestrial insects that fall into the water feed are fed, and they can also feed well on artificially rationed pellet feed under artificial breeding conditions. Rainbow trout have a well-developed stomach, a short intestine, and a well-developed pyloric lobe. It swims quickly, is suitable for intensive farming, and has high yields.

At present, there are more than 50 rainbow trout farms in China, distributed in Beijing, Heilongjiang, Shandong, Shanxi, Liaoning, Jilin and Shaanxi.

First of all, it is necessary to choose a suitable water source, such as spring water, groundwater. There are also suitable water temperatures, sufficient oxygen, water flow speeds, pH requirements, and salinity requirements.

Fish pond shape. Rainbow trout ponds vary in shape, but are mostly rectangular. The general aspect ratio is 8:

1--10:1, the appropriate ratio can be determined according to the terrain. Maintain a certain slope (1 50--1 100) from the water inlet to the water outlet, which is convenient for water exchange and sewage discharge.

Between the pools, the terrain can be used to classify the water drop arrangement layout. Fish pond area and depth: The construction of fish pond can be determined according to the actual situation.

Fish pond construction. The structure of the fish pond is a brick-concrete structure, and the inner wall is smoothed with cement. The inlet and outlet are located in the upper middle of the fish pond to facilitate the maintenance of the water level.

At the same time, fences should be set up at the entrance and exit of the water to prevent fish from escaping.

The water quality is clear, warm in winter and cool in summer, the water quality is stable, and the groundwater without debris can also be used, but it must be exposed to the sun before use. The temperature of the growing water should be controlled between 7-22 as much as possible, and the oxygen in the water should be sufficient.

It is best to keep it between 18-22 degrees. This temperature is ideal for the growth of rainbow trout. And it also contributes a lot to their reproduction. Therefore, you must pay attention to the temperature when raising fish.

To grasp the time of sunshine, the water tank should be ventilated frequently, pay attention to the problem of drainage, choose mineral water, feed the fish in moderation, these are the taboos of raising rainbow trout, if you want to raise rainbow trout, you must control these problems.

The density of culture should not be too large, and there should be no more than 100 fry in one cubic meter of water. It is best to breed in greenhouses to avoid bacteria from the outside floating into the water. The temperature of the water should be controlled at about 20 degrees, and the temperature should not be too low.

1. Rainbow trout is a cold-water fish, usually inhabiting rivers and streams with clear water quality, no pollution, and gravel bottom. Rainbow trout prefer to live in water with a temperature of 8-20.

2. Under the condition of artificial dense culture, the optimal growth water temperature is 12-18, when the water temperature is lower than 7 or higher than 20, the appetite is significantly reduced, the growth is slowed down, the disease-resistant country is weakened, the water temperature reaches 24 when the feeding is stopped, and it can be sold in 26 short time to die. Therefore, the upper limit of water temperature of rainbow trout in captivity is 24. Rainbow trout do not have a clear lower growth limit temperature, as long as the water does not freeze, they can feed and grow, but the feeding intensity is weakened and the growth is slow.

3. The dissolved oxygen in the socks in the trout water body is required to be above 5mg l, when the dissolved oxygen is at 5 mg l, the fish's respiratory rate is accelerated, and the fish feels uncomfortable, and the symptoms of hypoxia appear at 4mg l, which often causes death. When the dissolved oxygen is 3 mg L, there will be a large number of deaths. The pH value of the aquaculture water should be kept at 5-9, alkalinity, hardness 8-12.

Rainbow trout have a wide range of adaptations to salinity, and after a brief period of domestication, they can be used in seawater for adult farming.

4. Water is a prerequisite for rainbow trout farming, and the water used for aquaculture should be flowing cold and cool water, with a perennial water temperature below 22 and no freezing in winter. The water quality should meet the water standards for fish farming, and be clear and pollution-free. Such water sources include mountain springs, mountain streams, underground water intake, bottom drainage of reservoirs, and meltwater from snow-capped mountains.

Trout farming requires a certain flow rate, usually the number of fish that can be raised is calculated according to the flow rate, under normal circumstances, the flow rate of 1 liter of water per second is about 50-200 kg of trout culture. The water in the flowing pond should have a certain flow rate, generally between meters, the flow rate of the juvenile fish water should be smaller, and the water flow rate of raising fish and breeding broodstock is slightly larger.

First, the fish pond is built and disinfected, and then the healthy fry are selected and fed. The feed is fed with pellet bait, generally 3-4 times a day for fry and 2 times a day for adults. In addition, in the process of breeding, it is necessary to screen the fish in time according to the growth of the fish to keep the size of the fish basically the same.

Finally, pay attention to the prevention and control of fish diseases.

Economic benefits of rainbow trout farming.

The economic benefits of rainbow trout are generally quite good, but the cost of its breeding is also relatively high, because rainbow trout has high requirements for water quality, so we have to spend a lot of time and labor on water quality, followed by the cost of farm construction, feed and other aspects, totaling about 100,000 to 200,000. One acre of pond can produce nearly 30,000 catties of rainbow trout, so according to the purchase price of 30 yuan a catty, then one mu of pond can earn about 1.8 million a year, excluding the cost of net profit of millions, the profit margin can be said to be quite large, and the economic benefits are very considerable.

Rainbow trout, also known as waterfall fish and colorful fish, have the characteristics of short growth cycle, low cost and good meat quality"Water ginseng"reputation. In recent years, the scale of artificial rainbow trout breeding in China has become more and more mature, and the prospects and benefits of aquaculture have become considerable. So what should we pay attention to when farming rainbow trout?

Next, let's take a look at the key points of rainbow trout farming. When selecting seedlings, we should fully realize the importance of the quality of the fry, and the fry released should be inspected by the relevant departments or cultivated by themselves, healthy and disease-free, neat and tidy, without carrying any pathogens, and the specifications are at 10g tail.

<> stocking density can be reasonably controlled according to pond conditions and water flow. Under normal circumstances, the stocking density of fry around 10 g tail is 1500 m2 to 1800 m2. The stocking density is too low, the yield is low, and the pond utilization rate is low; The stocking density is too high, which can easily cause insufficient dissolved oxygen and increase diseases.

In terms of feeding, the method of manual sprinkling is adopted, and large manufacturers use automatic bait. The frequency of bait is generally twice a day. Bait should be quantitative, to prevent the fish from eating too full, generally to eighty percent full is appropriate, observe the fish eating weakened, some fish swim out of the group, can stop the bait, bait should be even, try to make the fish can eat enough feed, pay attention to reduce the waste of feed.

Juvenile stocking densities range from 5,000 to 10,000 square metres at the beginning. Later, the juveniles gradually grow up, and when feeding, several feeds can be mixed and boiled into a paste, made into small particles, and sprinkled into water. Feeding method:

At the beginning of feeding, bait should be sprinkled all over the water. After two weeks of feeding, the feed can be sprinkled on areas with a lot of fish. The most common baits used for juvenile fish are egg yolks, livestock liver, fresh trash fish, dried daphnia or brewer's yeast.

At present, the use of artificial feed is more widespread.

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When breeding rainbow trout, it is necessary to pay attention to the feeding of feed, rainbow trout is very sensitive to feed, and suitable fish feed should be fed; Also pay attention to the amount of dissolved oxygen in the water, sufficient oxygen content will accelerate the growth of the fish, and the texture of the fish meat will be better; It is also necessary to control the water temperature, this fish is a cold-water fish, and the water temperature must not exceed 25 degrees, otherwise it will cause a large area of death.

When farming rainbow trout, it is important to pay attention to water temperature details, feed details, safety details, environmental details and weather details. Because these aspects are important for rainbow trout farming, and can also determine the quality of rainbow trout, we must pay attention to the details of these aspects when farming rainbow trout.

In the selection of feed, choose some smaller, which can help digestion, in the process of breeding should also increase the amount of dissolved oxygen in the water, too low, will lead to poor fish food, not easy to digest.

Pay attention to the cleanliness of the water, the quality of the water, the temperature of the water, the oxygen in the water, what kind of temperature these fish are suitable for, and what kind of food they eat.

In the feed, it is smaller, aids digestion, and increases the dissolved oxygen in the water during the breeding process. If it is too low, it will cause the fish to eat poorly and be difficult to digest.

In order to improve the yield and quality of rainbow trout, the following points should be paid attention to during the farming process:

1. Preparation of fish ponds.

In order to better meet the growth of rainbow trout, we need to study the choice of breeding sites and pay attention to creating greater economic benefits under limited conditions. As one of the main conditions for site selection, water source, annual temperature difference and water quality are important issues to consider. The water is slightly alkaline and the annual water temperature is not higher than 22 years to provide a rich nutrient for the growth of rainbow trout, the most important of which is abundant dissolved oxygen.

2. Fish pond construction.

The farm is equipped with fry ponds, fingerling ponds, adult ponds, mother ponds and spare mother ponds, which can adapt to the different growth stages of rainbow trout. The fish pond is made of concrete, and each row has a certain number of water droplets to promote the natural flow of water. The fish pond is rectangular in shape with an aspect ratio of 5-8:

1。Each pond has an inlet, an outlet, and a outfall. To prevent fish from escaping, nets should be set at the entrance and exit and the net spacing should be set according to the size of the fish.

3. Feeding management.

The determination of fish stocking should be combined with the amount of water injected during the culture process, the amount of water transferred from the pond and the level of feeding. Generally, 50 100 m2 is appropriate. In order to reduce disease and mortality in fish farming, ponds must be disinfected before farming.

We chose to use quicklime. According to the standard of 100 grams of quicklime per square meter of water surface, we dissolve all quicklime in water at a ratio of 1:10 and then sprinkle it all over the tank.

After disinfection, fresh water should be injected into the pond after 4 to 6 days, depending on the actual situation. Ensure that the temperature difference between the storage and transportation water body and the water temperature of the storage pool does not exceed 3. Be light when raising fish.

Place the equipment to store and transport the fish in a slow pond below the surface of the water and let the fish swim freely.

Fry are fed 4 3 times a day, adults and broodstock 2 times. Feed twice a day, preferably from 9:00 a.m. to 10:00 a.m

00 and 16:00 to 17:00 p.m. feeding; Feed 3 times a day at 8:

00 and 17:00 18:00;Feed 4 times a day at 8:00

Set evenly between 00 and 18:00. Pay attention to the feeding speed and be patient and careful when feeding.

Fourth, water quality control.

Rainbow trout farming requires very strict water quality. In addition to high dissolved oxygen, a micro-flowing environment is required. The color of the water should be clean and transparent, the chromaticity is generally less than 30 degrees, the suspended solids in the water are less than 15mg L, when the dissolved oxygen usually needs to be greater than 6mg L, the dissolved oxygen does not meet the standard, and the ventilation device should be installed when oxidizing.

When dissolved oxygen reaches 9 mg l, rainbow trout grow faster. When dissolved oxygen is low, the gills die immediately after a long period of death. When the dissolved oxygen is less than 3 mg l, a large number of gills die.