The daily management focus of cage culture of eating fish

The daily management focus of cage culture of eating fish

Cage culture of predatory fish refers to all fish other than planktonic predatory fish (mainly carp) in cage culture, mainly including carp, carp, grass carp, carp, tilapia, and freshwater fish. , squid, squid, leather beard, etc. The cage fish culture has the advantages of investment, efficiency, high output, and significant economic benefits, and is favored by the majority of fish farmers. However, if you want to use cage culture to succeed, you must strengthen day-to-day management, including the following aspects:

Feeding of feed: The feed used for cage fish farming generally uses compound feed. According to the type of farming, appropriate feed can be used for formulating, and self-preparation can be made, and commodity feed can also be purchased directly for feeding. Feeding frequency and feeding amount should be flexibly controlled according to the type of fish, season of fish, water temperature, water quality, weather changes, and feeding conditions of fish. Generally, they are fed 6-8 times a day, and the fish body weight is 2-7% per day. Feeding.

Check the cages in time: Before the cages are placed, they should be carefully inspected. After the fishes are stocked, they must be checked again. The purpose is to find out whether the cages are damaged or not and prevent them from being stolen in order to reduce the losses. Anti-escape inspections are generally conducted in the evening and on the following morning. Anti-theft inspections are mainly carried out in the later period of culture, especially before the arrest. After the storm and flood, temporary inspections are required.

Cleaning of cage attachments: After the cages are launched into water, a large amount of dirt and filamentous algae and other organisms will be attached after 3-5 days, blocking meshes and affecting the exchange of water bodies, resulting in the lack of dissolved oxygen and food in the tanks. Affect the growth of fish and even cause the fish to die. The cage should be cleaned regularly by lifting the net, rubbing it with your hand, and swinging it in water. The operation should be meticulous and do not damage the net. Mechanical cleaning, drug cleaning, and biological cleaning can also be used.

Move the cage regularly: In the breeding process, according to the flooding of the water area, the change of the water level, the position of the water tank in time to move the cage, avoid the bad breeding environment, and select the suitable place.

Management when disaster weather occurs: Disaster weather mainly refers to the atmosphere, storms, and floods. High winds often accompany heavy rain, and the cage area has stronger wind power than land. Net cages set up in lakes and reservoirs can sometimes cause cages to tip over or be submerged under the waves. Therefore, before the winds are blown, it must be checked whether the frame and piles of the cages are firm. Fixed cages should be reinforced with ropes, check for looseness at the ligation site, and properly increase the height of exposed parts of the cage. Floating cages are to prevent breakage and breakage of the bottom of the cage as it is caught in the bottom of the cage during heavy winds. Floods can accelerate the flow of water in the cage setting area, flush the cage pilings, or cause the floating cages to displace the anchors. As the water level rises, the fixed cages do not escape the fish. Therefore, before the flood occurrence period, it must be reinforced. Net cages, heighten the cages to expose the surface of the net, if necessary, cover the open cage with a net cap. Regardless of high winds or heavy rain or flood, check the cages immediately afterwards to see if there are any damaged areas, whether the piles and ropes are damaged, and whether the fish groups have died. If problems are found, immediately repair and rescue them.

Regular inspection of fish schools: The purpose of periodic inspections is to check the disease so that preventive measures can be taken in time; second is to observe the growth of fish so as to promptly investigate the feed rate; and thirdly, to know whether fishes in cages are Pirates and fish escape. Generally check every 7-10 days, and then adjust the feeding rate, no more than 15 days to check once, otherwise the amount of bait is not easy to grasp, easy to feed more food to cause waste or less feeding caused poor growth of fingerlings. Examination of fish diseases can generally be performed in combination with growth tests before the onset of the disease in early May. And decide whether to immediately take preventive measures against drugs.

Strengthen disease prevention: Diseases of fish cages, focusing on prevention, should be combined with prevention and control methods. The commonly used prevention methods include fish disinfection, tool disinfection, food table disinfection, drug hanging bags, hanging larvae disinfection, fingerling immersion disinfection, etc. Generally within a production cycle, it can be sterilized 2-3 times, that is, the first time in the net. Boxes were placed at the time of stocking; the second was conducted before the onset of the season in early May; and the third was before and after the beginning of autumn in August.

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