CATDOLL : CATDOLL: Why is the yield of fish farming in ponds not as high as that of fish farming in cages?

Why is the yield of fish farming in ponds not as high as that of fish farming in cages?

The reason why pond fish farming does not have as high a yield as cage fish farming is that cages are easy to manage, such as sterilization, spraying pesticides, and feeding bait, and it is convenient for fish to eat, so they grow well and have a high yield.

Cage fish farming is a method of raising fish by placing cages made of mesh in certain waters. Cages are mostly set up in lakes, rivers, reservoirs and other waters with certain water flow, fresh water quality and high dissolved oxygen content. High-density intensive breeding can be implemented. According to the bottom area of ​​the cage, the output per square meter can reach more than ten to dozens of kilograms. The mesh is made of synthetic fiber or metal wire, and the box body is preferably rectangular. Each cage has an area of ​​dozens of square meters and a height of 2-4 meters. There are three types of setting methods: floating, fixed and sinking, and floating is more commonly used.

The main breeding techniques of pond fish farming include polyculture and intensive breeding, rotation of catch and release, daily management and comprehensive operation. Pond fish farming is the fish farming method used in most parts of China. At present, the output accounts for more than 60% of freshwater fish farming. It has the characteristics of small investment, high income, quick effect and stable production.

The core of China's pond fish farming technology is to raise fish species with different habits and feeding habits or the same species but different sizes in the same pond in a mixed culture and reasonable density. Silver carp and bighead carp live in the upper layer of the water body, grass carp and bighead bream live in the middle and lower layers of the water body, and black carp, dace, carp, crucian carp, and non-crucian carp live in the bottom layer of the water body. When these different types of fish are mixed in the same pond, not only can the stocking volume per unit area of ​​the pond be increased, but also, since different fish require different baits, various bait resources in the pond can be fully utilized, a mutually beneficial relationship can be generated, and eutrophication of the water body can be prevented and pond production conditions can be improved. Mixing fish of the same species with different sizes can produce large-sized fish species while producing edible fish, thereby reducing the number of ponds for breeding fish species and expanding the area for raising edible fish. Within a reasonable density range, as long as the water temperature is appropriate, the water quality is good, the proportion of mixed fish and the size of the stocked fish species are appropriate, the bait is of good quality and sufficient, and the feeding and management are meticulous, the yield will be increased.