In flat-bottomed rivers with a water depth of more than 2.5 m and little year-round variation in water level, fish farming with cages works very well. 1) Generally speaking, a height of 50 cm between the cage bottom and the riverbed is sufficient. Leaving a gap between the cage bottom and the riverbed facilitates water flow, which first adds oxygen and second serves to exchange water
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<p>In flat-bottomed rivers with a water depth of more than 2.5 m and little year-round variation in water level, fish farming with cages works very well. </p><p></p><p>1) Generally speaking, a height of 50 cm between the cage bottom and the riverbed is sufficient. Leaving a gap between the cage bottom and the riverbed facilitates water flow, which first adds oxygen and second serves to exchange water and improve water quality. The height of the cage body can be 2.5-3 m. After this depth is immersed in water, 50 cm of netting is left above the water surface to prevent jumping fish from escaping. It is best to cover the top with netting to prevent birds from stealing and eating the fish. </p><p>2) It must be noted that the cage should be placed in a sunny spot, a place with a gentle flow speed, or a place with backflow. As far as the whole river channel is concerned, backflow areas are often places where fish gather; backflow areas have gentle flow speeds and abundant feed, making them very suitable for fish growth. </p><p>3) If the river channel is not deep, moso bamboo can be driven in as stakes, the cage tied with ropes, and marker lines indicating the cage's draught depth marked on the stakes, making it easy to adjust in time and stabilize the cage depth. Use slip knots for the ropes to make it easy to raise and lower the cage body. </p><p>4) For this fixed-type cage, tie straight strip-like objects along the top and bottom ropes of the cage body; for example, thin bamboo poles can be used for the top and bottom ropes, and iron bars can also be used for the bottom rope, stretching the entire cage flat and straight, avoiding folding of the netting in the water and reducing capacity. Install rings at the four corners of the cage. When in use, fit the rings at the four corners onto the bamboo stakes, and the formed cage will be firmly tied to the bamboo stakes and ready for farming. The rings can also be tied to the bamboo stakes, four on the top and four on the bottom, using pull ropes to control the entire cage body, following the rise and fall of the water level, and adjusting the draught depth of the cage body in time. In places with gentle flowing water, feed is most abundant. When the cage body is flat and straight, the fish are most comfortable. </p>
For flat-bottomed rivers with a water depth of more than 2.5 m and little year-round fluctuation in water level, cage fish farming works very well.
1) Generally speaking, it is enough for the bottom of the net to be 50 cm above the riverbed. Leaving a gap between the net bottom and the riverbed allows the water to flow, which both adds oxygen and helps exchange the water body and improve water quality. The cage body can be 2.5-3 m high. After this depth is submerged in water, leave 50 cm of netting above the water surface to prevent jumping fish from escaping. It is best to add a net cover on top to prevent birds from stealing the fish.
2) It must be noted that the cage should be placed in a sunny spot, where the current is slow, or where there is backflow. As far as the whole river channel is concerned, places with backflow are often where fish gather; the backflow is slow and gentle and food is abundant, making it very suitable for fish growth.
3) If the river is not deep, bamboo can be driven in as stakes and the cage tied with ropes; mark the stakes with lines showing the cage's draft depth so the cage depth can be adjusted in time and kept stable. Use slip knots for the ropes so the cage body can be raised and lowered easily.
4) For this fixed-type cage, tie straight strip-like objects along the top and bottom of the cage body along the main ropes; for example, thin bamboo poles can be used for the top and bottom ropes, and iron bars can also be used for the bottom rope, so that the whole cage is stretched flat and straight, avoiding the netting folding in the water and reducing capacity. Install rings at the four corners of the cage. When in use, fit the rings at the four corners onto the bamboo stakes, and the formed cage is firmly tied to the bamboo stakes and ready for farming. The rings can also be tied to the bamboo stakes, four on the top and four on the bottom, with pull ropes to control the whole net body, so it rises and falls with the water level and the cage's draft depth can be adjusted in time. Where the current is gentle, food is most abundant. When the cage body is flat, straight and taut, the fish are most comfortable.