CATDOLL : CATDOLL: How to grow tilapia the fastest and how long is the breeding cycle?

How to breed tilapia to grow fastest and how long is the breeding cycle?

1. Select the pond: Build the breeding pond in a place with fresh water and no industrial pollution. The pond area is generally 5-20 mu, the water depth is 2.5-4m, the pond bottom is flat and the pond foundation is solid, and there should be no tall sunshades around. 2. Clean the whole pond: Drain the water in the pond and expose it to the sun for more than 1 week, then spray the whole pond with 225mg/L quicklime for disinfection. 3. Cultivate water quality: After the drug toxicity disappears, you can use a 60-mesh silk screen to filter the water.

1. How to breed tilapia to grow fastest

1. Choose a pond

(1) Site selection

Generally, breeding ponds need to be built in places with sufficient water sources, fresh water quality, no industrial pollution and convenient transportation.

(2) Pond

The area of ​​the sugar pond is generally 5-20 acres, the water depth is 2.5-4m, the bottom of the pond is flat, the pond foundation is solid and has good water retention performance, and it requires good ventilation all around and no tall sun blocks.

2. Clean the pond

(1) Before stocking, the pond should be drained and exposed to the sun for more than one week. During the drying period, the pond base needs to be repaired and reinforced.

(2) Generally, dry ponds can be disinfected by spraying 225 mg/L of quicklime throughout the pond. Note: new water cannot be introduced within three days after pond cleaning to avoid affecting the cleaning effect.

3. Cultivate water quality

(1) Generally, about 7 days after pond cleaning, when the toxicity of the drug disappears, filter the water with a 60-mesh silk screen to 70-80cm and apply 300-400 kg of organic fertilizer per mu to cultivate plankton and provide food for tilapia.

(2) When the water quality becomes richer, water can be gradually added to 1m. When the seedlings enter the pond, water can be gradually added to the maximum water storage depth of the pond as the water temperature rises and the fish grow.

4. Stocking fish fry

(1) Select seedlings

① It is necessary to select tilapia fry with smooth and undamaged body surface, strong physique, plump body, uniform size, high male rate and size of about 5cm for stocking.

② Before stocking, the fish bodies must be soaked in 5% salt water and then put into the fish pond.

(2) Stocking fish fry

① After confirming that the pond water is non-toxic, tilapia fry can be released at the rate of 1 tilapia fry per cubic meter of water. Generally, 40-50 bighead carp weighing 50g per tail and 30-40 silver carp weighing 30g per tail can be appropriately added per acre.

② When the size of tilapia reaches 100g/tail, 30-50 southern catfish can be appropriately released per acre.

5. Feeding and management

(1) Before the size of tilapia reaches 150g, it can be cultured with fertilized water, that is, animal manure is added to the pond to cultivate biological feed. Usually, fertilizer is applied once a week, with 100-150 kg per mu each time.

(2) When the size of tilapia reaches 250g/tail, it can be fed with complete feed. Generally, feed is given twice a day, once at 9-10 am and once at 5-6 pm. The daily feed amount is 3-4% of the fish body weight.

6. Water quality management

(1) Generally, one aerator can be installed for every 5 mu to provide timely oxygenation to prevent tilapia from floating.

(2) Add new water to the pond every 3-4 days, adding 20-30cm of new water each time.

(3) If you find that the water quality has deteriorated and you need to change the water immediately, drain 1/3-1/2 of the pond first, then add new water until the water quality improves.

(4) Quicklime can be sprinkled into the pond at regular intervals to keep the pH value of the pond water at 7.5-8.5 and the transparency at 25-30 cm. The method of use is to sprinkle 10-15 mg/L of quicklime throughout the pond.

(5) Note: When adding new water, you need to filter the new water first to filter out wild fish to prevent them from entering the pond and reproducing, which would affect the growth and yield of tilapia.

7. Prevent and control fish diseases

During the transportation of tilapia, Saprolegniasis is prone to occur. Generally, 200-250g of chlormethinol per acre can be sprayed throughout the pond for prevention and control.

2. How long is the breeding cycle of tilapia?

1. Breeding cycle

The breeding cycle of tilapia is generally 5-6 months, and it can usually be put on the market for sale after 5-6 months of breeding. However, the breeding cycle of tilapia is affected by factors such as dissolved oxygen content, water level, water quality and fertility, and different management methods. Therefore, the specific breeding cycle of tilapia needs to be determined according to actual conditions.

2. How to shorten the breeding cycle of tilapia

(1) Timely supplementation of oxygen

① Too high water temperature and too dense stocking density will lead to insufficient oxygen content in the water, resulting in too low dissolved oxygen in the water, thus affecting the growth of tilapia. Therefore, in addition to controlling the stocking density of tilapia, it is also necessary to turn on the aerator for 1-2 hours after noon on sunny days in the season with higher temperatures to increase the dissolved oxygen in the water.

② For ponds with high stocking density, the aerator needs to be turned on at night to avoid hypoxia. The aerator also needs to be turned on in time on rainy days.

(2) Water level

Generally, when the weather is hot, the water in the pond is easy to evaporate, causing the water level to drop, thus affecting the growth of tilapia. Therefore, it is necessary to increase the water volume and raise the water level. The water level generally needs to be maintained at 2-3m and new water should be added at any time to ensure the water is clean, avoid extending the breeding cycle of tilapia and affecting the time to market.

(3) Water quality and fertility should be reduced in hot seasons

Tilapia has high requirements for water quality and fertility. Appropriate fertilization is beneficial to its growth, but the amount of fertilizer must be controlled in high temperature seasons to avoid excessive fertilization of the water that affects the oxygen content in the water. When the water is too fertile, new water can be injected to dilute it or quicklime can be used to adjust it.

(4) Strengthen fish pond management

① Seasons with higher temperatures are generally the seasons when tilapia grows fastest, and are also the seasons when fish diseases are most prevalent. Therefore, it is necessary to increase the number of patrols and carefully observe the growth of the fish and the water quality.

② Medicines for preventing and treating fish diseases can be added to fish feed, and water bodies and fish schools can be disinfected regularly to avoid outbreaks of fish diseases.

What does tilapia eat to grow?

Tilapia is an omnivorous fish that mainly feeds on plants. The digestive tract contents of tilapia in ponds are mostly organic debris and other plant feeds (such as aquatic plants, commercial feeds, etc.), followed by phytoplankton, zooplankton and a small amount of benthic animals.

When tilapia is raised artificially, it can be fed 2 to 3 days after entering the aquaculture water surface. Under artificial breeding conditions, various feeds can be fed, such as wheat, corn, cake meal, etc., which are all high-quality feeds.

The protein content in the feed should be 32% to 35% at the beginning. When the individual size grows to about 200 grams, the feeding amount can be adjusted to 2% of the total weight of the fish, and the protein content in the feed should be guaranteed to be 27% to 29%. When the individual reaches about 300 grams, tilapia enters the fastest growth period.

Additional information:

Reproductive capacity

Tilapia matures early, has a short spawning cycle, and hatches young fish in its mouth. It does not require high breeding conditions and reproduces naturally in large areas of static water. Tilapia reaches sexual maturity at 6 months old, and a female fish weighing about 200 grams can carry about 1,000 to 1,500 eggs.

During the breeding period, the male fish has beautiful nuptial colors, and two openings on its abdomen: the anus and the urogenital opening. White semen flows out when the abdomen is squeezed. The female fish has three holes on its abdomen: the anus, the genital opening, and the urinary opening.

When the water temperature is 18-32℃, the mature male fish has the ability to "dig a nest". The mature female fish enters the nest to mate, produces mature eggs and immediately holds them in the mouth to fertilize them. The fertilized eggs develop in the female fish's mouth. When the water temperature is 25-30℃, the young fish can hatch in 4-5 days. The young fish leave the mother's body when the yolk sac disappears and has certain abilities.

Wheat, corn, cake and meal are all high-quality feeds. Tilapia has a wide range of diets and can be fed with a variety of feeds under artificial breeding conditions.

When feeding tilapia, the protein content in the feed should be 32% to 35% at the beginning, and the daily feeding amount should be 3% to 5% of the total weight of the fish. When the individual size grows to about 200 grams, the feeding amount can be adjusted to 2% of the total weight of the fish, and the protein content in the feed should be 27% to 29%. When the individual reaches about 300 grams, tilapia enters the fastest growth period, and the daily feeding amount is maintained at 1% to 2% of the fish body weight, and the protein content in the feed is above 35%.

Tilapia should be fed twice a day, and the amount of food should be enough for the fish to eat within 30 minutes.

Tilapia should be fed with appropriate green fodder (red duckweed, ryegrass, etc.) every day, and the green fodder should be controlled at about 0.3-0.5% of the body weight of the fish in the pond. It is best to use granular bait, and the bait storage time should not exceed 15 days. The bottom valve of the water flow pool should be opened every 3-4 days to thoroughly drain the sewage.

Additional information:

Tilapia has a well-developed stomach that can secrete gastric acid, which can digest some algae that other fish cannot use. Under pond culture conditions, most of the contents of the digestive tract are organic debris and other plant feeds, followed by phytoplankton, zooplankton and a small amount of benthic animals, such as water earthworms and chironomid larvae.

As tilapia grows, its diet changes. In the juvenile stage, it mainly feeds on zooplankton, and as the fish grows, it gradually switches to plant feed.

Reference source: Baidu Encyclopedia-Tilapia

Tilapia is an omnivorous fish that mainly feeds on plants. It does not require high feed quality and has a strong digestive ability. It can digest and absorb algae that other fish cannot use, such as Microcystis and Anabaena. A small amount of concentrated feed combined with a large amount of roughage can meet its needs. In addition, it can also eat the residual feed debris on the bottom of the pond and in the water to keep the water fresh.

The reservoir tilapia likes to eat green tilapia the most, but it also eats shrimp, dead fish, small fish, grass, some selenium, some plankton or unicellular algae (their feces are black) because there is no frozen food to eat. The feces of the tilapia in commercial farms are yellow.