The water areas for cage fish culture are mostly reservoirs, lakes or rivers with extremely slow water flow. These waters have their own characteristics. For example, the environmental characteristics of reservoirs are between rivers and lakes, and the water flow is slow, which is the similarity between reservoirs and lakes.

Generally, reservoirs can be divided into three sections: upper, middle and lower reaches, with some differences in water depth, and the lower reaches are the deepest; The upstream is the shallowest. Fish live in water, so the environmental conditions of water are very important.

In order for the fish raised in cages to grow well, the water quality must be good, the dissolved oxygen in the water should be sufficient, and the water temperature and hydrochemical composition should be appropriate. In addition, we should also understand the habits, feeding habits and requirements for the ecological environment of cultured fish, so as to facilitate cage culture production.

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Selection of water area for cage fish culture

In a pond with sufficient depth, cage culture can keep fish out of contact with soil, improve the processing performance and quality of fish and raise the price of fish. It is best to arrange the cages in a "needle" shape or a "plum blossom" shape, so that the cages can be staggered, which is beneficial to the growth of fish. The spacing between cages should be as large as possible, preferably more than 20 meters.

If large reservoirs choose series cages, each group of series cages should not exceed 6, and the distance between the two groups should not be less than 500 meters. In addition, consider the density of cages. If the cage density is too high, the natural bait will be in short supply and the growth of fish will be inhibited. If the density of cages is too small, the production potential of waters can not be fully exerted. When setting cages, we should adjust measures to local conditions and be flexible.

(1) Cages should be selected in areas with less adverse environmental factors. There are no pollution and obstacles in the cage setting area, and traffic passages should be avoided.

(2) The waters where cages are set should be reservoirs and lakes with shelter from the wind, sunny, wide water surface and good sunshine conditions. The high water temperature in such waters is beneficial to the growth of fish and can avoid the harm of heavy rain and flood to cages.

(3) In residential areas and areas with more farmland, cages for raising silver carp and bighead carp with natural bait should be selected. In such waters, humus and fertilizer water flowing from mountains, farmland and villages are rich, which is beneficial to the growth of fish.

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