CATDOLL : CATDOLL: Factory fish farming? Factory fish farming cycle?

1. Factory fish farming?

Ⅰ: Factory fish farming: It is a factory-scale recirculating aquaculture that adopts high-density intensive breeding methods.

2: The species farmed here are all high value-added fish, shrimps and crabs; compared with traditional pond farming, there are significant differences in water quality regulation and monitoring, stocking density, feeding time, feeding amount, disease prevention, etc.

3: Traditional pond water adjustment methods such as using chemicals are not suitable for factory-scale recirculating aquaculture. In a high-density factory-scale aquaculture environment, it is very important to control the amount of feed fed. Excessive feed residues will decompose into ammonia nitrogen, nitrite, etc. in the water, which will cause water pollution and provide favorable conditions for the reproduction of some bacteria, causing the occurrence of diseases.

2. Factory fish farming cycle?

Factory fish farming, also known as industrial fish farming, is a new fish farming technology that has flourished in the world in recent years. Different from traditional natural water surface fish farming or pond fish farming, it allows fish to be raised in artificially constructed fish ponds (usually made of cement, brick, or stone).

By increasing the water temperature, mechanically increasing oxygen, automatically controlling and adjusting various water conditions, and artificially feeding granular bait, the stocking density of fish can be increased and their growth accelerated. This method can shorten the pond fish farming cycle from two or three years to three or four months. Based on a three-month breeding cycle, fresh fish can be harvested three to four times a year, and the yield of fresh fish per mu can reach more than tens of thousands of kilograms, even exceeding the factory-farmed Japanese flounder in seawater.

3. 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.

4. What is the profit 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.

5. How to increase the temperature in factory fish farming?

We can build greenhouses to increase the temperature for factory fish farming

6. Guangxi’s factory fish farming technology?

Each subsystem of the factory provides the best living conditions for the farmed animals, the feed conversion rate is improved, the fish growth rate is accelerated, and the feed coefficient is naturally reduced. Due to the use of modern equipment and management technology, and equipped with high-protein, complete nutrient feed, the farmed animals are well fed and grow fast, with less or no illness, and the growth cycle is significantly shortened.

7. What subsidies are available for factory fish farming?

Easy approval procedures, factory fish farming, fish species provided

8. What are the advantages and disadvantages of factory fish farming?

The advantages are: concentrated resources; advanced equipment; management can be scaled, streamlined and standardized; a large amount of labor costs can be saved; high output; good benefits; easy for national centralized management; and the success rate can be guaranteed to a certain extent.

The disadvantages are: high technical requirements; harsh factory construction conditions; high costs; high barriers to entry and not suitable for large-scale promotion at this stage; serious consumption of water and soil resources; serious environmental pollution; rapid outbreaks of diseases and easy annihilation due to improper management; poor flavor of farmed varieties and low selling prices; high staff turnover and troublesome management.

9. What equipment is needed for factory fish farming?

Biofilter

Bacteria are mainly used to remove toxic substances dissolved in water, such as ammonia.

It is divided into two categories: biological filter and purifier. Its supporting facilities include aeration sedimentation tank and biological filter.

10. Does factory fish farming require a large investment?

Large investment, need to purchase complete sets of equipment, high risk