Method for breeding fishes with net cages capable of separating fishes of different sizes

Abstract

The invention discloses a method for breeding fishes with net cages capable of separating fishes of different sizes. The method comprises the steps that firstly, an inner net cage and an outer net cage are provided, wherein the inner net cage is arranged inside the outer net cage and located at one corner of the outer net cage, the diameter of each mesh of the inner net cage is 3-7 cm, the upper side of the inner net cage is connected with a first feeding pipe, the first feeding pipe is located in the middle of the upper side of the inner net cage, an upper end cover of the outer net cage is connected with a second feeding pipe, and the second feeding pipe is located at another corner of the outer net cage; secondly, fry are bred in the outer net cage; thirdly, when the chest circumferences of all the fry do not reach the diameter of each mesh of the inner net cage, the first feeding pipe is used for feeding fish feed to the inner net cage, and when the chest circumferences of some fry exceed the diameter of each mesh of the inner net cage, the fry are limited by the inner net cage from swimming into the outer net cage, the second feeding pipe is used for feeding feed to the outer net cage, and feeding lasts for 20-30 minutes. By the adoption of the method, the fishes of different sizes can be separated, and the possibility that the fishes of small sizes are attacked is lowered.

Description

technical field [0001] The invention relates to a culture method, in particular to a fish culture method using net cages that can separate fish of different sizes. Background technique [0002] Since 1973, after the introduction of cage fish farming technology in our country, by the 1980s, there were more than 500 hectares of cage culture on large water surfaces such as lakes and reservoirs, and the average fish production per hectare was about 300 tons. . Since the 1990s, the cage fish farming industry has shown a trend of vigorous development. The scale and density of cage farming have continued to increase, and the aquaculture area and production have increased rapidly. [0003] Existing net cage fish culture technology all adopts single casing as net cage. During breeding, different fish may be mixed, and the growth speed of different fish is also different. Certain fast-growing and larger-sized fish will attack slower-growing, smaller-sized fish, causing farmers’ econ...

AI Technical Summary

Problems solved by technology

During breeding, different fish may be mixed, and the growth speed of different fish is also different. Certain fast-growing and larger-sized fish will attack slower-growing, smaller-sized fish, causing farmers’ economic losses. loss

Images