Cage fish culture is a fast and High-yielding fish culture technology, which uses special artificial cages, placed in lakes, reservoirs, rivers and large ponds, adopts strict artificial control means, maximizes the use of natural resources of water body, and increases artificial bait.

First, the production of cage.

The cage is usually made up of frames, buoy and netting. The frame is multi-purpose bamboo or wood. It can be used as a frame to support the net and float. But Phyllostachys pubescens is not durable. It is best to use wood impregnation. Float is mostly made of foam plastic or floating bucket, which has strong buoyancy, strong load and durable. It is better to use polyethylene nodular double net clothing for net clothing, and the specifications of the mesh can be chosen at around 2.5cm-3.5cm. In order to prevent the net from sinking, tie a float every 1.5m to 1.5m in the net, and leave a 1-1.5m long opening at one end of the net as a feeding and starting fishing. The size, shape and size of the cage and the size of the mesh must be determined according to the production scale, fish species, fish age and feeding conditions. At present, it is better to use rectangular shape and specifications 6m * 8m * 2.5m.

Two. Stocking of fingerlings.

When stocking fish species, we must pay attention to the variety and density of stocking. Green, grass, silver carp, bighead carp, crucian carp, Mandarin fish, black fish and so on can be used as cage fish breeds. It can be mixed with many varieties or single raised. The proportion of mixed culture should be determined according to the amount of food sources. The stocking density of cage fish depends on the ecological conditions of water area, especially water temperature, dissolved oxygen, water flow, wind and wave, water quality, mesh size, the basis of natural bait in water body, the area of cage, the cultivation of fish species in cage or the cultivation of adult fish. The water quality is especially fertile and living, about 70-100 fish species per square meter can be thrown, and 30-70 fish can be thrown into eutrophic water.

Three. Breeding and management of cage culture.

According to the characteristics of cage fish culture, in order to obtain high yield under the conditions of small area, high density and short time, feeding and management measures centered on food must be throughout.

1. Bait: High-quality mixed food with high protein content, rich carbohydrates, and rich in vitamins, inorganic salts and other nutrients.

2, bait Taiwan: the need to set up nylon screen silk or polyethylene monofilament woven bait Taiwan. The size and size of the food table are determined according to the size and specifications of the cage and the size of the fish.

3. Feeding criteria: The daily feeding criteria should be adjusted at any time according to the changes of fish body, water temperature and season in the process of cultivation and growth. It is generally appropriate to control 70-80% of their satiety, and the effect of overfeeding is not ideal.

4, bait method: fish into the box 1-2 days after the beginning of bait. At the initial stage, the proper sound is generated, and the habit of feeding the fish to the table or at the food court is trained. The number of bait thrown is generally 4-6 times a day. The amount of bait thrown is less and more, with a certain interval of time when the standard of bait is strictly controlled.

5. Safety Inspection: Check the cage regularly whether it is intact, whether the water depth is suitable (should be maintained at 3-5 meters), whether the fish activities are normal, etc.

6. mesh cleaning: mesh (mesh) is easy to be adhered to by other organisms such as sponge and binary algae after the cage is filled with water, which seriously affects the renewal of water body and the ability of feeding, so the mesh must be washed frequently.

Four. Disease prevention and control: cage fish culture because of the good water environment, water can always keep fresh, water dissolved oxygen content is high, artificial bait, high quality and adequate quantity, if properly raised and managed, generally not easy to get sick. However, due to the high density of feeding, once the disease occurs, the infection is particularly rapid, the mortality rate is higher, and the economic losses are greater. Therefore, we must observe carefully. Once we find the disease, we can take the method of hanging bags and feeding the bait.

Five. Fishing: when deciding to catch, it is usually possible to stop baiting on the 1-2 day before catching. When fishing, the cage can be towed to the flat and barrier-free shallow water area for wading and netting; and the other is to use small boats in deep water area for in-situ fishing, that is, to use bamboo poles across the bottom of the net, to drive the fish in the corner of the cage or to receive all the net clothes on the boat, leaving only a corner, with small net fishing.