CATDOLL : CATDOLL: If you want to use silver carp cage farming technology to breed silver carp, what issues should you pay attention to during the actual operation?

If you want to use silver carp cage farming technology to breed silver carp, what issues should you pay attention to during the actual operation?

Silver carp cage culture is a three-dimensional culture technology that makes full use of reservoir resources. Its advantages are low cost and high efficiency. There is a large profit margin, which is conducive to the improvement of economic benefits. Let me introduce some technical points to you.

First, pay attention to the structure of the cage frame. Most cages are made of polyethylene with a diameter of 1.13mm, a mesh size of 3~5cm, and a cage size of 4m×7m×2m. Use a single-layer frame, and the frame is a bamboo pole with a diameter of about 10cm. Multiple cages are connected together to fix the water tank and avoid drifting.

The layout of the cage will affect the growth rate of catfish. Generally speaking, the cage needs to be placed in a wider water body, the water body should not be too large, the water quality should be good and pollution-free. A reservoir with sufficient sunshine, leeward, sufficient sunshine, high water temperature, sufficient bait, 4-7m water depth and convenient transportation is required.

November to December or February to March is the best time to stock cages. The water temperature is lower at this time, which is less harmful to fish and has a higher survival rate. The breeding scales are 80g and 350g respectively. If the stock is 80g, there are 450 to 550 fish per box. If the stock is 350g, the number of fish per box is 200 to 250. Disinfect the fish before releasing to prevent them from getting sick and dying in the fish tank.

Good breeding and management are essential for fish farming. The quality of breeding is directly related to the success of breeding. With reasonable feeding and management, silver carp grows rapidly, has low mortality and good benefits. If it is not managed properly, the growth of catfish will slow down, and the morbidity and mortality will be high. Therefore, attention should be paid to cage fish farming and management. If the fish is placed in a new cage, it should be soaked in water 7-10 days in advance to prevent the rough surface of the new cage from injuring the fish. When the cage is placed in the reservoir, a lot of dust will adhere to the cage due to the action of plankton, which will reduce the amount of plankton in the cage and cause insufficient feed for silver carp. Therefore, the cage needs to be cleaned frequently, usually every 15 to 20 days.

During the cage culture process, the cages should be moved according to the actual situation. In order to prevent the cages from being washed away during the flood season, it is necessary to move the cages. Moving the cages can also increase the biological content of erbium in the cages and increase the growth rate of catfish. Although catfish feed on plankton, when the water body is too thin or there are too many nets, it is necessary to increase the biomass of the bait net to provide sufficient bait for silver carp and increase the growth rate of catfish.

The daily management of captive silverfish also needs to be taken seriously. Check the cages frequently, observe the activities of catfish, and find problems in time. The above are the key points of catfish cage farming operation technology for your reference and learning.

The specific size of the cages should be determined based on the area of ​​the aquaculture waters. The cages can be set up in water environments with relatively slow water flow, such as lakes and downstream rivers.

It is necessary to pay attention to the water temperature when breeding silver carp, the fish in the reservoir, the fish breeding methods, the fish preservation process, and the health of the feed. These are all issues that need to be paid attention to when raising fish.

During the actual operation, you should pay attention to preparing oxygen generators and disinfectants, ensuring the water quality is clear, and having surplus bait and feed.

Seeking silver carp (two-bearded) breeding technology

You are talking about a fish called bigmouth catfish.

1. To improve the survival rate and breeding efficiency, the largemouth catfish released must be over 8cm in length and of uniform size. The stocking density is 1000-1500 per mu for 8cm-1ocm size and 800-1200 per mu for 10cm-12cm size. 100-120 large-sized silver carp and bighead carp weighing 150g-250g are added to the pond to regulate water quality.

2. Feeding: Catfish is a carnivorous fish, and mainly feeds on live fish, fresh-frozen fish, and animal viscera, but it can also be fed with artificial compound feed through artificial domestication.

(1) Carnivorous bait: When releasing largemouth catfish, corresponding fish species that are slightly smaller than largemouth catfish should be released. The main daily food is still fresh ice fish chunks. Animal offal such as pig lungs and cow lungs can also be fed. When these animal feeds are not available, artificial feeding can be used to feed artificial compound feeds, which can achieve better results.

(2) Artificial compound feed: The protein content of compound feed is 41%-50%. When feeding, each pond is equipped with (2-4) feeding tables to facilitate observation of feeding conditions.

1. According to the specifications of the fish species, there are three types of cages with different mesh sizes: first-level fish cages, second-level fish cages and adult fish cages. First-level fish cages: mesh size 0.6cm-0.8cm, specifications 4mx4mx2m or 5mx5mx2m, single-layer warp-knitted knotless polyethylene open cages; second-level fish cages: mesh size 1cm-1.5cm polyethylene knot open cages, specifications 4mx4mx3m or 5mx5mx3m; adult fish cages: mesh size 2.5cm-4cm, specifications 4mx4mx3m or 5mx5mx3m double-layer polyethylene knot closed cages.

2. Fish stocking The best time to stock largemouth catfish for primary stocking is in early and mid-May each year. The stocking density is 500-600 largemouth catfish/m2 according to the size of 4cm-5cm. After 15d-20d, they are divided into boxes according to size. For the size of 8cm-10cm, 350-450 are stocked/m2. When the size is over 15cm, they are promptly transferred to the secondary box for stocking, 250-300 are stocked/m2. When the fish weigh about 25g, they are transferred to the adult fish box, 40-60 are stocked/m20.

3. Feeding: A feeding table is set up in the cage to facilitate observation of fish feeding and full utilization of bait. Generally, one feeding table is set up for every 1om2, hanging 20cm-30cm away from the bottom of the net in the box. When the total length of the bigmouth catfish is 5cm-10cm, the daily feeding rate is 8%-10% of the fish weight; when the total length is 10cm-20cm, it can be adjusted to 4%-6%; when the total length is above 20cm, the feeding rate is 1%-3%. Feed three times a day in the morning, afternoon and evening. Among them, the amount of feeding is slightly increased at night. The bait can be mainly wild fish, iced fish, and animal offal. It can also be fed with artificial compound feed through artificial training. The method is: after the fish species enter the box, stop feeding for 1d-2d to make them feel a little hungry, then put a small amount of attractant on the bait table every day, and slowly feed artificial compound feed. As the bigmouth catfish adapts to the artificial compound feed, the amount of attractant is reduced accordingly until the bigmouth catfish is fully adapted to eating artificial compound feed.