Technology of fish culture in cage

Cage fish culture is the use of synthetic fiber woven into a net, assembled into a certain shape and specifications of the box, set in a larger body of water suitable for fish culture, raising fish species or adult fish.

Characteristics of fish culture in cage

Compared with traditional fish culture, cage fish culture has the characteristics of running water, close release, intensive culture, high yield, flexibility, simplicity, high yield and good benefit. This is mainly through the box mesh, continuous water exchange, so that the box often maintain sufficient oxygen and bait, in order to provide fish in a small volume of highly close breeding living conditions; at the same time, can avoid the harm of ferocious fish and prevent fish escape, maintain a high survival rate, so as to achieve the goal of high yield. The technology of "small cage fish culture" has been introduced into Jiuquan area since 1996. after three years of culture experiment, the culture technology has been basically mature, the yield is high and the benefit is good. Summing up three years of aquaculture experience, "small cage fish culture" has the following advantages:

1. The land and labor needed for the excavation of fish ponds can be saved. After investment, the net cage can be used continuously for 3 years.

2. Cage fish culture can make full use of water body, do not waste water resources, carry out mixed culture and close culture of upper, middle and lower layers of fish, and have a high survival rate, so it can achieve the goal of high yield.

3. The feeding cycle is short, the management is convenient, the mobility is flexible and the operation is simple. The location of the cage can be moved at any time according to the change of the environmental conditions of the water area. Ensure the harvest by drought and waterlogging, and achieve high and stable yield.

4. It is easy to start fishing, and no special fishing tools are needed during harvest. It can be listed at one time, or can be caught in batches according to the needs of the market, so as to facilitate the transportation and storage of live fish.

Selection of water area for cage setting

Cage fish culture is a high-density culture method, which is very strict to the environmental conditions. Cage fish culture mainly depends on the exchange of water bodies inside and outside the cage. On the one hand, it continuously supplies rich dissolved oxygen and bait with the water flow, on the other hand, it discharges a large amount of fish excreta out of the box in time with the current. Therefore, the cage setting of water light, water temperature, water flow, natural bait and so on, is very important, must choose well. The specific conditions for choosing water areas for cage fish culture are:

1, leeward to the sun, the water surface is wide, the water level is more stable, there is enough dissolved oxygen, does not hinder traffic and other water conservancy facilities.

2. There is a certain amount of micro-running water, and the flow rate is generally 3Mu6 meters per minute. The water depth is generally more than 3 meters, ensuring that the bottom of the cage is more than 0.5 meters from the bottom of the water.

3. The water quality is good, clear and pollution-free. The fork of Kuwan Lake near the mouth of the lake where the bait life is abundant.

4. Choose not far from the shore, convenient transportation and easy operation.