What aspects should be done in tilapia cage culture?

Hello! This is Brother Qian, talking about cars, and it's a pleasure to meet you here. See your question: "What aspects should we do well in the feeding management technology of tilapia cage culture?" "After that, I would like to say that I hope mine will help you.

First of all, there is the feed selection. The choice of feed not only affects the growth rate of the fish, but also affects whether the fish are profitable. Principles of feed selection:

Patable, fresh, nutritious, and reasonable. It is advisable to choose the extruded feed produced by the feed manufacturer with good reputation and scale, and generally do not use the heavy compound feed, which will cause waste due to the lack of fish to grab food.

Secondly, the feeding rate and the number of feedings. Fish weighing less than 50 grams, daily feeding rate 4 6; a body weight of 50 200 grams, daily feeding rate 3 4; weight 200 500 grams, daily feeding rate 2 3; A body weight of more than 500 grams, the daily feeding rate is 1. Feed 3 times a day at :

00。In the production operation, the feeding amount should be determined in combination with objective factors such as water quality and weather.

Thirdly, it is the feeding method. On the second day of the fish in the box, the fish are domesticated to develop the habit of eating regularly. When feeding, insist on doing it slowly, slowly, and as much as possible.

In the process of feeding, sometimes due to the effect of weather and water environment, the appetite of the fish is strong, and the amount of feeding can not be increased at will, otherwise it will not only waste the feed, but even cause the occurrence of diseases. And feed green fodder such as vegetable leaves from time to time.

Finally, there is the day-to-day management aspect. The daily management of tilapia culture in cages is an important technical means to ensure the high yield and efficiency of fish culture in cages. The management work mainly includes:

Check the cages frequently, do a good job of escape prevention, wash the cages, and take emergency measures for disastrous weather and accidents. It is imperative to grasp the work of preventing escapes, take strict precautions, and always heighten vigilance. Water rats, soft-shelled turtles, etc., will bite the cage, causing escape fish.

Therefore, insist on daily dragnet inspection, if the inspection is not thorough, it is likely to be wasted. In case of typhoons, storms, flash floods and other disastrous weather changes, the cage should be pulled to a sheltered place in time, check whether the frame and anchor rope of the cage are firm, and the cage should be reinforced with cables. Hang a trap net upstream of the cage to prevent floating objects and miscellaneous wood from breaking the cage.

First of all, we should pay attention to the choice of feed, good feed will affect the growth rate of fish, in the choice of feed to choose fresh, nutritional, reasonable. Next, we should pay attention to the method of feeding the fish, and start to tame the fish on the second day after the fish are put into the box, so that the fish can develop the habit of eating regularly. The daily management work mainly includes checking the cages frequently, doing a good job of preventing escape, and washing the cages.

Tilapia culture in cages has the advantages of large stocking density, short grow-out cycle, high survival rate, fast growth, high yield, good efficiency, convenient management and easy fishing, etc., and is a good way to develop tilapia production in a many, fast, good and provincial way, and has gradually become one of the main forms of tilapia farming. Especially in some reservoirs and lakes with excellent water quality, cage culture can improve the quality of tilapia adults and strive for a brand.

<> tilapia is resistant to low oxygen, fertilizer, cold and heat, and will get frostbite when the water temperature is 12 to 13 degrees Celsius. The living temperature is 15 to 35 degrees Celsius, and the critical temperature is Celsius Celsius. Therefore, when selecting a site in the reservoir, we must consider choosing the side of water quality and fertilizer, shelter from the wind and sun, and high temperature, and do not place it at the tuyere of the reservoir.

Cage structure and layout: It can be made into a 1 meter 1 meter 1 meter large cage, and the mesh is 3 cm large. The bottom of the box is made of dense mesh cloth into a disc-shaped bottom net with a side height of 20 cm to prevent the loss of bait.

Install insect trap lamp at 50 30 centimeters on the top of the fully enclosed cage, and set up a black plastic oblique intubation tube or black iron sheet pipe with a diameter of 10 centimeters thick at the upper corner of the net cover, as a feeding pipeline. The overall frame of the cage is made of bamboo (10 cm in diameter), and the top of the cage is made of black braid to make a hat larger than the lid of the cage, which is used to shade the tilapia in the box, avoid human interference from the outside world, avoid the interference of moving and dry objects, and protect the safe eating of the fish. In the dark, the amount of activity of the fish is greatly reduced, and the finger hole is conducive to growth.

The cage spacing is 2 3 meters, and the pins are arranged in a zigzag pattern.

Seed release time: The water temperature is about 24 degrees Celsius before the fingerlings can be stocked. The water temperature is below 20 degrees Celsius, and it is easy to frostbite the fish. Therefore, releasing seeds after a stable temperature of 20 degrees Celsius is conducive to the early start of fish feeding.

Stocking density: 330 550 tilapia per square metre in a cage with a tail weight of about 40 grams.

Feeding method: The fish that have just entered the box should be fed a small amount of bait with good palatability, and they should be fed stably after a few days, and they should be cast 4 times a day. The water temperature of 28 to 32 degrees Celsius is the ** water temperature for tilapia to eat, so you should feed more.

Chinese herbs are often mixed in the bait as a key point for disease prevention. In the season of flying insects, the net cover is uncovered at night, the light is turned on to attract insects to feed the fish, and the net cover is added during the day. It does not hurt the fish body and does not get sick, and the fish eat insects is the most useful.

The net cover creates a dark environment, and the water is good and the fish are non-stop.

To choose healthy fish fry, we must ensure the oxygen of the water when breeding, and we should also replace the water resources in time, choose the right feed, and then regularly remove the garbage, sort out the stains, and do the work of good ventilation and ventilation of socks.

Tilapia needs to be kept under strict control of the temperature and oxygen in the water. First of all, it is necessary to build a suitable Kai shirt pants as a pond, and also to enter the water quality sterilization of Husun Hengxing. Prevention of pests and diseases.

The selection of tilapia fingerlings should be based on high male rate, fast growth and large growth, and high rate of spring meat, so it is recommended to choose brand fish species. The size of the fish pond for breeding tilapia can be large or small, and the water carrying depth requirements are not strict, but for the fish ponds that need to be wintered, the water depth is required to be more than meters. Cultivated tilapia should be washed and withheld, and attention should be paid to the regulation of water quality from time to time.

Select the appropriate celery cavity varieties, breed, pay attention to water quality, pay attention to disinfection and sterilization work, pay attention to the feeding situation, pay attention to the proportion of feed orange branches, pay attention to light, oxygen content.

Pond cleaning and disinfection.

Before stocking the fish fingerlings, the drugs should be cleared, and the drugs in the pond mainly include quicklime, bleaching powder, tea meal, etc. It is also necessary to remove the aquatic weeds, green mud moss and weeds at the edge of the pond in the defeat of the imitation Min Pond, and remove the excessive silt at the bottom of the pond if possible.

To steam and disinfect the fish pond, the choice in prison is also very important, you should choose excellent fish species, ** to be clear, the specifications are neat and appropriate.

Before stocking, the pond must be cleaned and disinfected to kill diseases, bacteria and miscellaneous fish and shrimp in the water body. The old pond should be removed from the bottom mud of the pond in time, and the pond water should be drained before stocking, exposed to the sun for more than 7 days, and the pond edge should be repaired and the embankment should be strengthened during the drying period. After drying the pond, 75 100kg of quicklime water was used per mu to sprinkle the whole pond for disinfection.

About 7 days after clearing the pond, when the toxicity of the drug disappears, 70 80cm of water is added by filtering with a 60-mesh sieve silk screen, 300 400kg of organic fertilizer is applied per mu, and water is gradually added to more than 1m as the water color becomes thicker. After the tilapia fingerlings enter the pond, they gradually increase to the large water storage depth of the pond as the water temperature rises and the fish body grows larger.

Here's how:

1.Fingerling-stocking fingerlings must be based on ensuring adequate population production during a limited growing period, and the individual reaches the optimal commercial size, generally 20 to 30 g tails is preferred. Tilapia is usually 30 to 50 grams, with a maximum density of 130 150 per cubic metre of water.

When stocking 50 100 g tilapia fingerlings, the optimum density is 100 120 m2.

2.Although tilapia can feed on plankton and organic detritus in cages, their main food is still fed by hand. At present, most of them are fed with pellet feed specially formulated according to the nutritional needs of tilapia, and the feeding effect is good.

Floating pellet feed has a better effect than sinking, and feeding management is convenient. 1 2 days after the fingerlings are in the cage, they can adapt to the cage life and start feeding the bait at a rate of 3% to 5% of the body weight of the fish. The feeding rate is generally higher in the juvenile stage and lower in other stages.

The amount of bait per day depends on factors such as fish size, water temperature and feed. For each feeding, adopt a "slow-fast-slow" and "less-more-less" feeding method. At the beginning of feeding, the fish have not yet been concentrated, so they should be fed less and slowly; In the middle stage, the fish concentrate and fiercely grab food, and they should be fed more and quickly; When the fish are 80% full or 80% full, they should be fed less until they stop feeding.

3.Daily management makes frequent rounds to observe the dynamics of the fish, check the feeding status of the fish and remove bait. Keep the cage clean, wash the cage once every 5 7 days, and remove the debris hanging or attached to the cage to prevent blocking the mesh and making the water exchange smooth.

Prevent and treat diseases in a timely manner, find diseased fish, dead fish and seriously sick fish and fish immediately fish, and analyze the causes, and take timely measures. Conduct security checks to prevent fish from escaping. During the flood season and strong winds, the water level changes sharply, and people should be arranged to be on duty day and night, adjust the position of the cage in time to prevent stranding or inundation, and check the firmness of each part of the cage before and after the typhoon.

1.Tilapia culture in cages has the advantages of high stocking density, high survival rate, fast fish growth, high yield, convenient management, easy fishing and short grow-out time. Tilapia cage culture is a good way to develop tilapia production in a multiple, fast, good and economical way.

2.It has gradually become one of the main forms of tilapia farming.

3.In particular, cage culture in some reservoirs and lakes with excellent water quality can improve the quality of adult tilapia.

Tilapia fish cultured in cages has the characteristics of high stocking density, high survival rate, fast fish growth, high yield, convenient management, easy fishing and cultivation.

It has the advantages of short time. Tilapia cage culture is a good way to develop tilapia production in a multiple, fast, good and economical way, and has gradually become one of the main forms of tilapia farming. In particular, cage culture is carried out in some reservoirs and lakes with excellent water quality, which can improve the quality of tilapia adults and create a famous brand. Cage.

Tilapia fry before stocking, first concentrated in the pond hanging cage for about 10 days, put into the special pond batch cultivation into more than 20 grams of large-size summer fish fingerlings, and then stocking the pond for adult fish farming. Compared with the traditional direct pond cultivation method, this secondary cultivation method of fish fry and fingerlings greatly improves the survival rate of aquaculture. Here's how:

The preparation of the pond before stocking is similar to the conventional method of cultivating the fry, the pond is cleared before the cage is hung, the water quality is cultivated, and the amount of water is filled. After preparing the pond, hang the cages in the pond and soak them for 2 days in advance 2 days before the seedlings are released. Floating or stationary cages can be used to facilitate feeding and other operations (Figure 5).

The cage body is sewn with 40 mesh polyethylene mesh. Regardless of the size and shape of the cage, in order to facilitate the exchange of water bodies and facilitate the operation, it is generally made of rectangular cages with a length of 8 meters and a height of 8 meters and 2 meters, and can also be made into a hanging pond shape with a length of 10 meters and a height of 1 meter, which can be used as a hanging pond at ordinary times. The bottom of the cage sinks 1 meter below the water, and the upper edge rises above the surface of the water.

An inflatable aeration device (with a low-pressure air pump) is set up in the cage, and there is at least 1 sand and gravel outlet head per square meter.

Fig.5 Tilapia fingerlings cultured in cages in ponds.

The fish fry are put into cages with 10,000,000 fish per square meter. Feed special tilapia juvenile meal mixture 6 to 8 times a day, each time for 10 20 minutes per box or group of fish, or stop feeding when the fry are not intense. During the cage cultivation period, the cage should be continuously aerated and aerated to increase oxygenation, and a small corner of the cage should be pulled up every day to check whether there is residual bait or dead seedlings sinking to the bottom of the cage, and the feeding or diagnosis and treatment should be adjusted in time.

The pond is temporarily kept in cages for about 10 days, during which 1 or 2 intensive exercises are done to enhance the physique of the fry. When the fry are put into the pond, the overall count is made by the bowl measurement method, and the specifications are sampled and recorded.

After 10 days of temporary rearing in cages, they are transferred to fingerling rearing ponds. It is best to use a pond with a cage hanging in the cultivation pond, and the cage can be directly opened and put into the pond to reduce the handling operation of the pond. The area of the cage should be matched with the batch cultivation volume of the cultivation pond, and the density should be determined according to the cultivation target specification and time.

Generally, it is cultivated for about 1 month to become more than 20 grams of large-sized summer fish fingerlings, that is, divided ponds or stocked in adult ponds. If the density is not high, it can be bred into larger fingerlings.