A method of raising fish using cages that can separate fish of different sizes
A net cage fish farming and net cage technology, applied in the field of aquaculture, can solve the problems of attack growth speed, farmers' economic losses, etc., and achieve the effect of increasing activity, reducing the possibility of attack, and enhancing water flow
Active Publication Date: 2017-08-04
黄世仁
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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
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[0019] The present invention will be further described in detail below in conjunction with the accompanying drawings, so that those skilled in the art can implement it with reference to the description.
[0020] Such as figure 1 and figure 2 Shown, the present invention provides a kind of method that uses the net cage fish culture that can separate fish of different body types, comprises the following steps: Step 1, provide an inner net cage 2 and an outer net cage 1, this inner net cage 2 is arranged on The inside of described outer net cage 1 is positioned at a corner of described outer net cage 1, and the mesh diameter of described inner net cage 2 is 3~7cm, and the volume of described inner net cage is the volume of described outer net cage One third, a first agitator 3 is set in the middle of the inner net box, a plurality of second agitators 4 are arranged at the bottom of the outer net box, and the upper side of the inner net box is connected with The first feeding t...
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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...
Claims
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IPC IPC(8): A01K61/10A01K61/60
CPCA01K61/00A01K61/60Y02A40/81
Inventor 李成启
Owner 黄世仁