CATDOLL : CATDOLL: How many tilapia can be raised in one acre of pond? What should I pay attention to?

1. How many tilapia can be raised in one acre of pond? What should I pay attention to?

Tilapia is a tropical fish and has special requirements for the breeding environment. So how many can be raised per acre? Let me answer this question. We have raised this fish in our village.

Tilapia usually lives in fresh water. It has a strong adaptability. Tilapia lives in groups in many small ditches and small lakes and reproduces very quickly.

If you want to raise fish, you can put about 1500 per acre of fish pond.

About 2,000 yuan, and it is best to put about 1,600 fish in one acre of fish pond.

The most important thing to pay attention to when breeding is the water temperature. There are tilapia in many areas in the south, and tilapia in many waters will die in winter. Another thing to pay attention to is that the oxygen in the water must keep up, after all, the breeding density is quite high. You need to pay attention to these two points when breeding. I hope my answer can help you.

2. Raising Fushou Fish

Common Fushou fish are omnivorous, and feed mainly meat powder, preferably gaba shrimp. Some fish markets sell them. If this kind of fish is sick, it depends on the symptoms. Generally, the eyes become cloudy, blind, the eyeballs protrude, the body color becomes black, etc., which all indicate that the fish is sick. In this case, timely prevention is required. The method of internal and external disinfection is more effective. Internal administration is to mix some Chinese herbal medicines (such as Sanhuang powder, Andrographis paniculata, etc.) or allicin with feed for internal administration. Usage: Use 2-4 grams of Sanhuang powder or allicin per kilogram of feed for 3-5 consecutive days. External disinfection is to spray the whole tank with disinfectant, such as chlorine dioxide.

3. Can tilapia be raised together with eel fry?

Tilapia is very aggressive and cannot be kept together with other fish.

Tilapia is very aggressive, so eel fry cannot be raised together with tilapia. If raised together with tilapia, they should be raised with adult fish such as silver carp and grass carp to avoid being attacked by tilapia.

Can tilapia be raised together with eel fry?

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It is best not to mix tilapia with eel fry. The technical requirements are high (reference))

Polyculture of fish and eels in ponds is basically the same as general pond fish farming in terms of fish species placement, species matching, feeding and fertilization, disease prevention and management, but this technology is suitable for ponds with an output of about 500 kg per mu. If the fish output is too high and the water quality of the pond is poor, it will be unfavorable for the growth of eels. Low-yield fish ponds have relatively few small fish and shrimp bait organisms, and the eel bait is insufficient, which affects its growth. Wild eels are mainly used because wild eels are cheaper and the stocking cost is low.

How to mix tilapia fry

1. Breeding method: In order to improve the survival rate and reduce feed waste, tilapia fry breeding must control the stocking density and the fish species. Currently, it is mainly pond breeding and cage breeding. The fish suitable for mixed breeding with tilapia include silver carp, bighead carp, grass carp, bream and freshwater silver pomfret.

2. Combination stocking: Tilapia fry can be stocked for winter when the water temperature rises and stabilizes above 15℃ in spring every year. Generally, 1500 to 3000 tilapia fry are raised per acre in the pond, and 40 to 70 silver carp and bighead carp fry are mixed to control water quality.

3. Cage culture: Tilapia fry can be cultured alone, as the main species, or in combination with other species in cages. Large-sized fish species are preferred, and the stocking quantity should be determined according to water quality conditions. When the dissolved oxygen content is above 3 mg/L, the stocking density should be 3 to 20 kg per cubic meter of water.

4. Adjust the density: During the tilapia fry breeding process, as the fish bodies continue to grow, in order to adjust the breeding density and improve efficiency, they can be caught and marketed in batches and caught and released in rotation to adjust the fish load in the water and improve the feed return rate.

1. Nile tilapia: Nile tilapia is native to East Africa, Jordan and other places. It has the advantages of fast growth, omnivorous diet, low oxygen tolerance, large size, high yield and high fatness. It can be raised alone or used as hybrid broodstock in many areas of my country.

2. Aurelian tilapia: Aurelian tilapia is native to the lower reaches of the Nile River in West Africa and Israel. It is more cold-resistant, salt-resistant, and hypoxic-resistant than Nile tilapia, and has a higher catch rate. Hybridization with Nile tilapia can produce all-male tilapia.

3. Mozambique tilapia: Mozambique tilapia is native to Natal, Mozambique and other places in Africa. Due to the neglect of purification and breeding during the introduction process, the variety has degenerated and is only used as the mother of the hybrid fish of the Pomacea tilapia.

4. Red tilapia: Red tilapia is a faster growing type of tilapia. It is omnivorous, has strong reproductive capacity, is tolerant of a wide range of salt substances, has few diseases, is large in size, has beautiful body color, and has delicious meat. It is very popular among consumers and producers in Guangdong, Hong Kong and Macao.

5. Oni Tilapia: Oni Tilapia is a hybrid of male Aurelia tilapia and female Nile tilapia. It looks similar to the mother, grows fast, has a male rate of up to 93%, has obvious hybrid advantages and a high catch rate.

6. Pomfret: Pomfret is a hybrid of female Mozambique tilapia and male Nile tilapia. It has the advantages of omnivorousness, few diseases, fast growth and high yield. However, its black body color and low meat content affect the development of its breeding.

4. The water temperature for tilapia cannot be lower than 15 degrees. Temperatures lower than this are not good for the growth of fish.

Tilapia is a warm-water freshwater fish with a fast growth rate and high yield. It is generally cultured in tropical and subtropical environments. It grows poorly in temperate environments. Using artificial heating to culture it is costly and has low benefits.

The usual measures for heating fish farming are greenhouse cold protection and utilization of industrial waste heat. If geothermal energy is available, it is also acceptable. For large-scale open environment farming, it is not cost-effective to use heat pumps for heating.

I have never heard of it. Who would do such a loss-making thing except for fry to raise tilapia in a heated environment?

Generally, farms use boilers for heating. If tilapia is to be heated, it is recommended to use external resources for heating.

The water temperature in the south is high, so it is generally not needed. In areas with low water temperatures, hot spring water is mostly used for aquaculture, and a heating pump is not required.

5. How to manage tilapia, grass carp and dace in fish ponds on a daily basis, prevent diseases and disinfect parasites, how to handle sludge and disinfect it, and how often to change the water?

How to manage tilapia, grass carp and dace in fish ponds on a daily basis, prevent diseases and eliminate parasites, deal with sludge and disinfect, and how often to change the water?

(1) Choose the right fish species

Male tilapia grow fast, but if there are female tilapia in the fish pond, it will cause excessive reproduction of offspring, resulting in too high a density of fish per unit water body, which will not only affect the growth rate of the fish, but also waste feed and increase breeding costs. At the same time, if there are female fish in the pond, male tilapia will affect their growth due to nesting. Therefore, the selection of fish species should focus on the high male rate, while also taking into account the characteristics of high catch rate, growth and meat yield. (2) Suitable pond conditions

There are no strict requirements on the specifications of fish ponds for tilapia farming. The area can be large or small, and even small reservoirs can be used for farming. Tilapia is also an excellent choice for cage farming. The area of ​​commercial tilapia farming ponds should be 10 to 15 mu. If the pond area is too small, the water environment will be unstable, which is not conducive to material circulation; if the pond area is too large, it will be inconvenient for production operations. The water depth of the pond should be 1.5 to 3.0 meters. However, for tilapia ponds that need to spend the winter, the water depth is required to be more than 2.5 meters. (3) Preparation before stocking

① Repair the fish pond: drain the pond water in autumn, and remove pathogens and harmful organisms and improve the soil quality by freezing, drying and exposing to the sun; remove weeds and debris, dig out excess silt, level the pond bottom, repair the pond edge, reinforce the embankment, dredge the drainage channel, set up fish fences, etc. ② Clean the pond with drugs: drain the pond water, leaving 3 to 5 cm of water at the bottom of the pond, and use 60 to 75 kg of quicklime per mu, or 10 to 15 kg of bleaching powder (containing 30% effective chlorine) per mu, or 40 to 50 kg of tea seed meal per mu. Generally, pond cleaning should be done at noon on a sunny day to improve the efficacy of the drug. ③ Inject water and apply basal fertilizer: about 7 days after pond cleaning, wait until the toxicity of the drug disappears, and inject 0.5 to 1.0 meters of new water, and apply basal fertilizer to cultivate plankton and other bait organisms. After the tilapia fingerlings are put into the pond, as the water temperature rises and the fish grows, gradually add water to the maximum depth. (4) Stocking time

Under natural conditions, when the water temperature is below 18°C, tilapia generally stop feeding. Therefore, fish can only be stocked when the water temperature is above 18°C. If stocked too early, the low water temperature can easily cause death; if stocked too late, the growth period is shortened, affecting the size of the pond and the fish yield. Therefore, when stocking fish, the right time must be grasped. (5) Appropriate stocking density

The stocking density of fry is 5,000 to 20,000 per mu, and the stocking density of adult fish is 1,000 to 2,500 per mu. Usually, in order to ensure that larger sizes can be put on the market, the stocking density is 1,000 to 1,500 per mu. Tilapia is mainly used for fillet processing. Generally, fish weighing more than 400 grams can be put on the market. The larger the size, the higher the price. Therefore, it is recommended to raise large-sized adult fish for sale. (6) Reasonable combination of species

3-4 months after the tilapia fry enters the pond, 80-100 snakehead fry of 7-10 cm in length are placed per mu to control the offspring of tilapia reproduction; 30-50 bighead carp; 100-120 grass carp; and 10-20 black carp. Do not mix tilapia with other fish species that are too large in size during the fingerling stage to prevent them from competing with tilapia for feed. Tilapia weighing more than 100 grams will develop a habit of snatching food, and the impact of other large fish species on them will gradually decrease. (7) Pay attention to drainage and irrigation

When adding water to the pond and draining water, special attention should be paid to prevent the entry of other wild tilapia, and dense net blocking measures should be taken to prevent tilapia from multiplying in large numbers in the fish pond. (8) Regularly turn on the aerator

Tilapia generally will not die due to floating, but it is also necessary to turn on the aerator to circulate the water between the upper and lower layers of the pond, prevent the tilapia from floating or floating in the dark, and reduce the extra nutrient consumption of the tilapia. When the weather is clear, turn on the aerator for 0.5 to 1 hour at noon, and turn on the aerator appropriately in the early morning depending on the specific situation. (9) Water quality management requirements

Tilapia is not very strict about the water quality. It feeds on plankton in the water. Relatively rich water can save feed. Therefore, the water quality for tilapia farming is relatively rich, and the transparency is about 25 cm. Relatively speaking, the water quality in the fish breeding stage is richer than that in the adult fish breeding stage. (10) Harvest in batches in a timely manner.

Tilapia that have reached marketable size should be caught and marketed in a timely manner, so that the water space can be fully utilized and the tilapia in the fish pond can continue to grow rapidly. (11) Anti-cold measures

Tilapia is not cold-resistant. To prevent the fish from freezing to death, the pond bottom should not be exposed to the sun too much before wintering, so that the tilapia can nest and live in groups for the winter. When winter comes, try to deepen the pond water, build a windbreak at the north corner of the pond, and raise water hyacinths on the water surface to prevent the water in the fish pond from flowing up and down, delaying the cooling time of the pond bottom. If conditions permit, renovate the fish pond and deepen the pond water to more than 2.5 meters. (12) Disease prevention and control

Fish disease prevention and control is one of the important links in pond fish farming, which determines the success or failure of farming. Therefore, we must conscientiously implement the principle of "comprehensive prevention, active treatment, and prevention is more important than treatment". The occurrence of fish diseases is the result of the interaction between the environment, pathogens and fish bodies. To prevent diseases, we should adjust the water quality, control the spread and reproduction of pathogens, and reasonably manage the breeding and enhance the physical fitness of fish. When abnormal behavior of fish is found, the cause should be investigated immediately, and effective prevention and control measures should be taken to control the development of fish diseases. In terms of medication, we should prescribe the right medicine for the right disease, and we should not abuse drugs. We should avoid using organic matter, pesticides, heavy metals, antibiotics, furans and sulfonamides that are easily accumulated by fish bodies and pollute the environment.