Fishing device for cultured fishes

Abstract

The invention relates to a finishing device for cultured fishes. The finishing device is arranged in front of a feeding platform and comprises at least three upright posts, a net cage and drag ropes, wherein two upright posts are vertically inserted into two sides of the feeding platform; other upright posts are vertically inserted into a pond; the upper ends of the upright posts are exposed out of the water surface by a certain length; rope penetrating pieces for the drag ropes to pass through are arranged at the upper ends of the upright posts; the net cage is arranged in an area defined by at least three upright posts; when the net cage is not subjected to tensile force of the drag rope, the net cage is sunken into the water bottom for a certain depth; the drag rope sequentially penetrates through each side of a net cage opening and the rope penetrating pieces at the upper end of the upright posts; two ends of the drag rope are used as operating ends at which the net cage is pulled up; when the drag rope is tightened, the net cage is raised; and when the drag rope is loosen, the net cage is sunken. The invention has the advantages of simple and ingenious structure, simpleness, convenience and feasibility for operation, high finishing amount, low production cost, high fishing rate for fishes, scientific fishing mode and low possibility of injuring fish bodies in the fishing process; the labor capacity for fishing can be greatly reduced; and large fishes can be fished and small fishes can be left.

Description

technical field [0001] The invention belongs to the technical field of aquaculture, and in particular relates to a fishing device for cultivating fish. Background technique [0002] Since the reform and opening up, my country has implemented the fishery development policy of "mainly raising fish". In 2006, my country's freshwater aquaculture output reached 21.4831 million tons, accounting for 59.78% of the total aquaculture output (35.9395 million tons). The rapid development of farming technology will inevitably require the corresponding development of fishing technology for farmed fish. Fishing refers to the production operation of catching aquatic animals in waters using fishing tools such as nets, fishing gear, hunting gear, and cages. Generally speaking, the current fishing methods for farmed fish mainly include trawling, purse seine fishing, gillnet fishing, etc. For ponds with small water body areas, drainage and dry ponds can also be used for fishing. Although th...

AI Technical Summary

Problems solved by technology

Although the above-mentioned fishing techniques have been widely used in the fishing of farmed fish, there are also some shortcomings in the application process. It will cause injury to the fish body, and the amount of catch is small; dry pond fishing needs to drain all the water in the pond, which is only suitable for ponds with small aquaculture water bodies. Breeding methods are not suitable (Wheel fishing and wheel placement means that in dense fish ponds, according to the growth of fish, after a certain period of time, some edible fish that have reached the commercial standard are caught, and some fish species are properly replenished to improve the quality of fish. Yield per unit area of ​​pond

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