CATDOLL : CATDOLL: How to raise fish in freshwater? How much profit can you get from raising fish in freshwater?

1. How to raise fish in freshwater?

Basic concepts of freshwater fish farming Freshwater fish farming is a production method that releases fish species into water bodies and gives them certain feeding and management, or reproduces and protects fish resources in water bodies, so as to obtain high-yield fish. At present, there are more than 30 species of freshwater fish farming in China. According to the characteristics of farmed fish, water conditions, and farming measures, freshwater fish farming is divided into the following methods: Classification according to the requirements of farmed fish for water temperature: Warm water fish farming, the general water temperature is 15_30℃, such as carp, grass carp, silver carp, bighead carp, crucian carp and bighead bream; cold water freshwater fish farming: the general suitable temperature is 10_20℃, such as rainbow trout, fine-scale fish, etc.; hot water fish farming: the general suitable temperature is 18_30℃, such as tilapia, freshwater silver pomfret, etc. 2. According to the conditions of aquaculture water, the types and specifications of fish, the types of waters and aquaculture measures, freshwater fish farming is divided into the following methods: a. Still water fish farming and flowing water fish farming b. Single culture, mixed culture and intercropping c. Pond fish farming, rice field fish farming, river fish farming, lake fish farming, reservoir fish farming, cage fish farming, enclosure and fence fish farming and factory fish farming, etc. d. Intensive farming, semi-intensive farming, extensive farming, etc. The following is a brief description of the important links of pond fish farming technology. Pond fish farming Pond fish farming is a fish farming method used in most parts of China. At present, the output accounts for more than 60% of freshwater fish farming. It has the characteristics of small investment, high income, quick results and stable production. Fish pond conditions Area: Generally, the area of ​​adult fish ponds is 5-10 mu, which is easy to manage. Parent fish ponds, fry ponds and fish seed ponds are preferably 3-5 mu. Water depth: Generally, the water depth of adult fish ponds is 2-3 meters. Wintering ponds in the north should be 1.5-2 meters below the thickest ice layer in severe cold. The water depth of fry ponds and hatching ponds should be 1.0-1.5 meters. The water depth of fish fingerling ponds is generally required to be 1.5-2.0 meters. Water quality: Abundant water sources and good water quality are the basic conditions for fish farming. Requirements for bottom quality: The best bottom quality of the pond is loam, sandy loam, and clay. Preparation work before stocking: Rest the pond, remove weeds and impurities from the bottom of the pond, and level the pond. Pond cleaning and disinfection: Traditional pond cleaning: drain the water in winter, and remove pests and improve the bottom quality by freezing, drying and exposing the bottom of the pond. Drug pond cleaning: quicklime or bleaching powder can be used. Water injection and water quality cultivation: After the pond is disinfected, wait until the toxicity of the drug disappears, and then new water can be added. 7-10 days before stocking the fish fingerlings, base fertilizer should be added to cultivate the water quality. (III) Stocking of fish fingerlings: Stocking large-sized fish fingerlings is a high-yield measure for pond fish farming. Large-sized fish species have strong disease resistance, high survival rate and rapid growth. Under pond breeding conditions, grass carp are generally stocked with fish species weighing 0.25 kg. After 4 months of breeding, they can reach a size of 0.5-0.75 kg in autumn. If they are stocked with 0.5-0.75 kg, they can grow to 1.0-1.5 kg. Silver carp and bighead carp are generally stocked with one-year-old fish species, with a size of 12-18 cm, and can reach 0.5-0.75 kg when they are out of the pond. Other fish such as carp, crucian carp and bighead carp are all stocked with one-year-old fish species, with a sparse density and a size of about 12-14 cm. After several months of breeding, carp can reach a size of 0.5 kg, bighead carp 150-350 grams, and crucian carp more than 100 grams. High-yield stocking model: Based on many years of breeding experience and scientific summary, various places have formulated many stocking models, which are not listed here one by one. Here we only introduce the 80:20 stocking technology: 1. Prepare the pond using the above standard method. 2. Stock the prepared ponds with uniform size of fish that can feed on pellets (such as crucian carp) and filter feeders (such as silver carp) of relatively uniform size, accounting for approximately 80% and 20% of the total production respectively. 3. Feed 80% of the fish with a nutritionally complete, physically good pelleted diet according to the prescribed plan and method. 4. Maintain the pond water quality at a level that will not cause stress reactions in the fish throughout the culture cycle. 5. At the time of harvest, the main fish (80%) should be of uniform size and reach marketable size. Fingerling Stocking Density The stocking density used in each location should be adapted to local conditions based on pond conditions. For farmers who adopt 80:20 pond fish farming technology for the first time, the weight of the main fish at harvest per acre of water surface shall not exceed the following limits: a. In ponds with limited oxygenation and no flushing, the fish weight is set at 167 kg; b. In ponds with unlimited oxygenation and limited flushing, the fish weight is set at 267 kg; c. In ponds with unlimited oxygenation and flushing, the fish weight is set at 400 kg; d. Together with the weight of 20% of the auxiliary fish, the total fish weight of ponds a, b, and c is 209 kg, 333 kg, and 400 kg respectively. e. If the average size of the fish out of the pond is expected to be 500 grams, the total number of fish stocked in ponds a, b, and c is 418, 666, and 800 respectively. Of which 80% are main fish and 20% are auxiliary fish. Pond fish farming management Good management is an important factor for successful farming. The ultimate goal of farming is to obtain the maximum profit. The biggest profit is achieved by maintaining a balance between production costs and the quality and quantity of fish species, the quality and amount of feed, and the quality of the environment. Scientific feeding management can be summarized into the following eight aspects: Regularly patrol the pond and observe the dynamics of the fish in the pond. Patrol the pond every morning, noon, and evening. Observe whether the fish have floating heads and the degree of floating heads before dawn. During the day, you can combine feeding and water temperature measurement to check the fish activities and eating conditions. In the hot season, when the weather changes suddenly, fish are prone to serious floating heads. You should also patrol the pond around midnight to stop serious floating heads in time and prevent flooding. Weed and remove pollutants to keep the water quality fresh and the pond environment hygienic, and prevent and eliminate diseases in time. Master the filling and drainage of the pond, maintain an appropriate amount of water, and prevent waterlogging. Depending on the situation, water is injected once every 10-15 days to supplement evaporation consumption, so that the fish have ample and comfortable activity space and a good living environment. Determine the amount of feeding according to the day, water temperature, season, water quality, fish growth and eating conditions, and do a good job of disease prevention in time. Make a good budget and allocation for the annual demand for feed and fertilizer. Use aerators, feeders and other fishery machinery reasonably, and do a good job of maintenance and electricity use. Pay attention to market conditions, arrange the pond in time, and do a good job of rotating catch and release in places where conditions permit. Make a good pond diary record and statistical analysis, which specifically includes the following aspects: Stocking of fish species and planned harvest, actual harvest records, feeding and fertilization records, water quality management and fish disease records, economic benefit analysis The above are the main points of pond fish farming technology. It can be systematically summarized in eight words: The water must have sufficient water sources, good water quality, suitable water temperature, and spacious water surface; The species must be high-quality varieties and large-sized fish species with strong physique; The bait must be nutritious artificial compound granular feed; Density must be high density to obtain higher yields; Mix appropriately to raise aquatic fish; Rotate well and rotate catch and release, or you can do rotation, that is, raise fish in the previous crop and raise fry in the next crop; Do a good job in disease prevention and treatment, and implement the principle of "early prevention when there is disease, prevention before there is disease, and prevention is more important than treatment"; Manage meticulous daily management.

2. What are the profits of freshwater fish farming?

There are many types of freshwater fish farming, and the market demand for different fish species will vary greatly. In addition, the scale of freshwater fish farming is different, and the income will also vary greatly. Sometimes the income will also vary greatly due to the time difference between the peak and off-seasons. But overall, the profit of fish farming will have a space of ten to twenty points, and the profit of some types of fish will be even higher.

3. What is the best way to raise fish in freshwater?

Freshwater fish farming is a method of producing high-yield fish by releasing fish species into water bodies and performing certain feeding and management, or by breeding and protecting fish resources in water bodies. At present, there are more than 30 species of freshwater fish farming in China. According to the characteristics of farmed fish, water conditions, and farming measures, freshwater fish farming is divided into the following methods:

Classification according to the water temperature requirements of farmed fish

For warm-water fish farming, the general water temperature is 15-30℃, such as carp, grass carp, silver carp, bighead carp, crucian carp and bighead bream; for cold-water freshwater fish farming: the general suitable temperature is 10-20℃, such as rainbow trout and silver carp; for hot-water fish farming: the general suitable temperature is 18-30℃, such as tilapia and freshwater silver pomfret.

Classification according to aquaculture water conditions

According to the aquaculture water conditions, fish species and specifications, water area types and aquaculture measures, freshwater fish aquaculture is divided into the following methods:

1. Fish farming in still water and fish farming in flowing water.

2. Single breeding, mixed breeding and integrated breeding.

3. Fish farming in ponds, rice fields, rivers, lakes, reservoirs, cages, enclosures and fences, and factory fish farming, etc.

4. Intensive farming, semi-intensive farming, extensive farming, etc.

Pond fish farming technology

Pond fish farming is the fish farming method used in most parts of China. Currently, the output accounts for more than 60% of freshwater fish farming. It has the characteristics of small investment, high returns, quick results and stable production.

1. Area: Generally, the area of ​​a fish pond is 5-10 mu, which is easy to manage. The area of ​​a parent fish pond, a fry pond, and a fingerling pond is preferably 3-5 mu.

2. Water depth: Generally, the depth of a fish pond is 2-3 meters. Wintering ponds in the north should be 1.5-2 meters below the thickest ice layer in severe cold. The depth of fry ponds and hatchery ponds should be 1.0-1.5 meters. Fish fingerling ponds generally require a water depth of 1.5-2.0 meters.

3. Water quality: Abundant water resources and good water quality are the basic conditions for fish farming.

4. Requirements for bottom soil: The best bottom soil for the pond is loam, sandy loam, followed by clay.

Preparation before stocking

Rest the pond, remove weeds and impurities from the bottom of the pond, and level the pond.

1. Pond cleaning and disinfection

① Traditional pond cleaning method: drain the water in winter, remove pests and improve the bottom quality by freezing, drying and exposing the pond bottom to the sun.

② Drug pond cleaning: quicklime or bleaching powder can be used.

2. Water injection and water quality cultivation

After the pond is disinfected and the toxicity of the drugs disappears, new water can be added. 7-10 days before stocking the fish, base fertilizer should be added to improve the water quality.

Fingerling stocking

Stocking large-sized fish is a high-yield measure for pond fish farming. Large-sized fish have strong disease resistance, high survival rate and rapid growth. Under pond breeding conditions, grass carp are generally stocked with fish weighing 0.25 kg. After 4 months of breeding, they can reach a size of 0.5-0.75 kg in autumn. If 0.5-0.75 kg is stocked, it can grow to 1.0-1.5 kg. Silver carp and bighead carp are generally stocked with one-year-old fish, 12-18 cm in size, and can reach 0.5-0.75 kg when they are out of the pond. Other fish such as carp, crucian carp and bighead carp are all stocked with one-year-old fish, with a sparse density and a size of about 12-14 cm. After several months of breeding, carp can reach a size of 0.5 kg, bighead carp 150-350 grams, and crucian carp more than 100 grams.

High-yield stocking mode

Based on many years of breeding experience, various places have developed many stocking models after scientific summary, which are not listed here one by one. Here we only introduce the 80:20 stocking technology.

1. Prepare the pond using the standard method described above.

2. Put fish species of uniform size that can eat pellet feed (such as crucian carp) and filter-feeding fish species of relatively uniform size (such as silver carp) into the prepared pond, accounting for approximately 80% and 20% of the total production respectively.

3. Feed 80% of the fish with a nutritionally complete, physically good pelleted feed according to the prescribed plan and method.

4. Throughout the entire breeding cycle, always maintain the pond water quality at a level that will not cause stress response in fish.

5. At harvest, the main fish (80%) should be of uniform size and reach marketable specifications.

Fingerling stocking density

The stocking density used in various places should be adapted to local conditions according to the pond conditions. For farmers who adopt the 80:20 pond fish farming technology for the first time, the weight of the main fish harvested per acre of water surface shall not exceed the following limits:

1. In a pond with limited oxygenation and no flushing, the fish weight is set at 167 kg.

2. In a pond with unlimited oxygenation and limited flushing, the fish weight was set at 267 kg.

3. In ponds where oxygenation and flushing are not restricted, the fish weight is set at 400 kg.

4. Together with 20% of the weight of the cultured fish, the total fish production weight of ponds a, b and c is 209 kg, 333 kg and 400 kg respectively.

5. If the average size of the fish out of the pond is expected to be 500 grams, the total number of fish stocked in ponds a, b and c is 418, 666 and 800 respectively, of which 80% are main fish and 20% are supplementary fish.

Feeding and management of fish in ponds

Good management is an important factor for successful breeding. The ultimate goal of breeding is to obtain the maximum profit. The maximum profit is achieved by maintaining a balance between production costs and the quality and quantity of fish species, the quality and amount of feed, and the quality of the environment. Scientific breeding management can be summarized in the following eight aspects:

1. Patrol the pond regularly to observe the dynamics of the fish in the pond. Patrol the pond in the morning, noon and evening every day. Observe whether the fish are floating and the degree of floating before dawn. During the day, you can combine feeding and water temperature measurement to check the fish activity and feeding situation. In the hot season, when the weather changes suddenly, fish are prone to serious floating. You should also patrol the pond around midnight to stop serious floating in time and prevent flooding.

2. Remove weeds and pollutants to keep the water fresh and the pond environment clean, and prevent and eliminate diseases in a timely manner.

3. Master the filling and drainage of the pond, maintain an appropriate amount of water, prevent waterlogging and drought, and prevent fish from escaping. Depending on the situation, fill the pond with water once every 10-15 days to replenish evaporation consumption, so that the fish have ample and comfortable space for activities and a good living environment.

4. Determine the amount of feed based on the weather, water temperature, season, water quality, fish growth and eating habits, and carry out disease prevention work in a timely manner.

5. Make good budget and allocation for annual feed and fertilizer demand.

6. Use aerators, bait throwers and other fishery machinery reasonably, and ensure proper maintenance and electricity use.

7. Pay attention to market conditions and arrange to release the fish from the pond in a timely manner. Where conditions permit, carry out rotational capture and release.

4. How to keep freshwater shrimp in a fish tank?

When raising river shrimp in a fish tank, you should pay attention to keeping the water clean and regularly clean the fish feces and residual feed at the bottom of the tank. You should also pay attention to feeding river shrimp with snail meat, small fish meat, special shrimp feed and other foods to prevent river shrimp from eating fish feces and becoming malnourished.

1. Maintain water quality

Things to note when raising river shrimp in fish tanks

When raising river shrimp in a fish tank, you need to pay attention to keeping the water clean. You can change the water every week, and you need to clean up the fish feces and residual feed at the bottom of the fish tank to avoid contaminating the water source in the fish tank.

2. Feeding requirements

Things to note when raising river shrimp in fish tanks

Also pay attention to feeding river shrimps with food such as snail meat, small fish meat, special shrimp feed, etc. You can also feed river shrimps with food such as earthworms, fly maggots, silkworm pupae, etc. If you don't feed river shrimps for a long time, they may eat fish feces and become malnourished.

3. Avoid strong light

Things to note when raising river shrimp in fish tanks

River shrimps are afraid of exposure to the sun. When raising river shrimps, it is best to plant some aquatic plants in the fish tank, such as moss, dwarf pearls, etc., to make it easier for the river shrimps to hide.

5. What is the best combination for freshwater mixed fish farming?

When it comes to mixed breeding of freshwater fish, the most important thing is to find a compatible mix of fish. The best mix should be a combination of species with different living habits, dietary preferences and body sizes to maximize the diversity of the aquatic ecosystem. For example, carp can coexist with orcas and goldfish because their eating habits and movements are very similar; red dragon and Borneo fish can also coexist because their body shapes and mouth shapes are quite different, and they have different eating habits, which can avoid competition for food and territory. Finally, when breeding fish together, be sure to pay attention to the number and placement of fish, pay attention to the health of the fish and the water quality, and avoid predation and disease transmission.

6. What equipment is needed for freshwater fish farming?

The first is the fish tank. The choice of the fish tank can be determined according to your living environment. Now the more popular one on the market is the aquarium, which is certainly better than our traditional fish tank in terms of aesthetics. The sizes of the aquarium are 60, 80, 1 meter, 1.2 meters, and 1.5 meters. These are the more common sizes. If you have special needs, it can be customized.

The second is a water pump. If there is sand and gravel at the bottom of the fish tank, it is recommended to buy a sand washer so that the sand and gravel at the bottom of the tank can be cleaned when changing the water for the fish.

The third is the thermometer. There are two types of thermometers on the market now, one is the ordinary watermark thermometer, and the other is the electronic thermometer. The electronic thermometer can adjust the switch of the heating rod according to the changes in temperature.

The fifth is the heating rod, which is mainly used in winter and is a device to maintain the water temperature in the fish tank.

The sixth is the air pump. The function of the air pump is to increase the oxygen content in the water and expel carbon dioxide in the water.

The seventh is the filter, which is divided into several parts including a deep water pump, a catheter, and a filter cotton bin. The filter can filter out large particles of dirt from the water in the fish tank in the filter bin and increase the oxygen content of the water.

The eighth is the cleaner, which is attached to the fish tank by the magnetic force of a magnet. It can clean the moss and other attachments inside the fish tank. Once all these are prepared, you can assemble a high-end tropical fish tank!

7. What is the largest freshwater fish farming base in Hainan?

Wenchang has become the largest tilapia breeding base in Hainan Province.

Tanniu Town has built a 10,000-acre tilapia breeding base in Shenggupo, and the total tilapia breeding area in the town has reached 16,000 acres, making it the largest freshwater breeding base in Wenchang.

In recent years, Wenchang City has made full use of its advantages of abundant wasteland and freshwater resources, vigorously developed tilapia farming in accordance with local conditions, and regarded tilapia farming as an important part of agricultural industrial structure adjustment and an important way to increase farmers' income. The farming area has gradually expanded and the output has increased significantly, showing an unprecedented rapid development momentum.

Last year, the city had 997 tilapia farmers, with 5,215 employees. The newly added tilapia farming area was 15,000 mu, the total tilapia farming area reached 63,400 mu, the output reached 51,363 tons, and the output value was 359.54 million yuan, an increase of 47% and 66% respectively over last year. At present, the city's tilapia farming is mainly distributed in Tanniu, Baoluo, Fengpo, Jinshan, Wengtian, Changsa, Longma, Baofang and other places.

At present, the city's tilapia farming area has reached 80,000 acres, and the city's tilapia farming target this year is 120,000 acres.

8. What are the tips for raising fish in freshwater fish stores?

1 Fish farming skills are very important and indispensable. 2 There are many skills in fish farming. First of all, you have to choose the species. The species you choose should be adapted to the local water quality and environment. Different species of freshwater fish also have different feeds, living habits and growth conditions. Secondly, pay attention to the maintenance of water quality. Change the water and clean the utensils regularly, and pay attention to keeping the water clean and stable. Secondly, you must master the reasonable combination of bait and the grasp of feeding time. Different species of freshwater fish have different requirements for the type and quantity of bait. Finally, pay attention to regular inspections of the physique and growth status of freshwater fish, and adjust the feeding and environment in time. 3 Fish farming is a good leisure hobby that requires patience and care. If you master it, the little goldfish in your fish tank will also have a happy home.

9. Can you raise fish by mixing fresh water with salt?

You can't raise fish by adding salt to fresh water.

Ordinary table salt contains only a few elements besides sodium chloride. However, sea salt contains much more trace elements than table salt, including more than 20 trace elements such as iodine, aluminum, bromine, etc. Sea salt specially used for raising marine fish can be sold in the aquarium market. Dissolving this sea salt in water is closer to the natural state of seawater, which is very different from table salt.

Since adding edible salt doesn't work, can adding seawater salt to freshwater definitely keep marine fish alive? Actually not. Chen Hong, the person in charge of an aquarium supplies wholesale supermarket on Bobei Road, said that marine fish can only survive longer if the entire environment of the fish tank is close to the marine ecosystem.

10. Tips for raising fish in a small freshwater fish tank at room temperature?

If you use a small fish tank with normal temperature water to raise ornamental fish without taking any heating measures, I personally recommend that you raise the following species of fish.

Local Betta: This is a small ornamental fish. Although it is classified as a tropical fish in the ornamental fish classification, it has a wide adaptability to water temperature and is almost no different from the common warm-water fish. Under normal circumstances, this fish can survive in water temperatures between 0.5-38 degrees. At the same time, this fish does not have very high requirements for the water environment and dissolved oxygen in the water. Relatively speaking, it can be regarded as a type of ornamental fish that is relatively easy to breed. Therefore, this fish is also used by many fish lovers for practice.

Goldfish: This is the most common type of ornamental fish. There are many varieties of goldfish and their shapes vary greatly, providing a variety of choices for fish lovers. This fish does not have very high requirements for water temperature. As long as the water temperature changes less than 2 degrees in a short period of time, it can survive well in water temperatures of 0.5-38 degrees. Some varieties with strong vitality can even withstand high temperatures of 40 degrees for a short period of time. This variety of fish includes our most common grass goldfish, Ryukyu, Lionhead, Ranchu, Bubble, etc.