CATDOLL : CATDOLL: Freshwater Pomfret Breeding Cycle (How long is the Freshwater Pomfret Breeding Cycle)

1. How long is the freshwater pomfret breeding cycle?

The breeding cycle of freshwater pomfret is generally less than two years.

Freshwater pomfret is an excellent freshwater aquaculture species. Its main advantage is its fast growth rate. Generally, it only takes 3 to 4 months of aquaculture to reach the market size of 4-5 taels, and it can reach 500 to 800 grams in one year of aquaculture. Freshwater pomfret can grow up to 10 kilograms, but the larger the size, the more popular it is with consumers. Considering the cost of aquaculture feed, the basic aquaculture cycle of freshwater pomfret generally does not exceed two years.

At present, golden pomfret is artificially farmed in the southeastern coastal areas of my country, among which Guangdong, Guangxi, Hainan and the southern coastal areas of Fujian are the main production areas of artificial freshwater pomfret.

2. Freshwater Pomfret Farming Density

Generally, 2000-3000 3cm pomfret are stocked per acre.

Pomfret, also known as mirror fish or flat fish, is a kind of fish that can be used for viewing and eating. Pomfret has delicious meat and rich nutrition, and even has a certain effect on preventing cardiovascular diseases. Moreover, pomfret has few bones, so many consumers like it very much. Nowadays, we generally eat artificially cultivated freshwater pomfret.

Half a month before stocking, add 60-80cm of water, soak tea seed cake in warm water and sprinkle it all over the pond to eliminate the eggs of other fish in the pond, add organic fertilizer and fertilize the water, and when the water color turns yellow-green, you can stock the fry. The fry should be selected with small differences in size, which is conducive to breeding management. Generally, 2000-3000 3cm pomfret are stocked per mu. Before stocking, place them in an environment with a water temperature of about 20 degrees for a period of time. During the temporary breeding, you must do a good job of feeding management, feed some zooplankton or newly hatched Artemia nauplii, feed feed after a week, and after 15-20 days of cultivation, you can put them in the pond for breeding.

3. Freshwater Pomfret Breeding Technology

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.

Fingerlings 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.

Pond fish farming management:

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.