A device and method for catching cold water fish in large-scale aquaculture cages in summer

Abstract

The invention belongs to the technical field of aquaculture and marine resource development, and relates to a device and method for catching cold-water fish in large-scale culture cages in summer, including a floating frame, a fish collecting part and a fish guiding channel connected in sequence, and the floating frame is fixed It is installed in the upper part of the fish collection part, and the lower part of the fish collection part is connected with the fish guide channel; the light lure device is arranged in the fish guide channel. When in use, the high-temperature water in the fish collection part is pumped out through the water pump, so that the bottom cold water enters the fish collection part; the fish school is induced to enter the fish collection part through bait and light lure device; when the fish school in the fish collection part reaches a certain density, it is closed The connecting part captures the fish in the fish collecting part; after the fishing is completed, the device is removed. The device and method provided by the present invention are used for fishing. After the fishing is completed, the device is removed, and normal cultivation can be resumed in the net cage. The device is simple and the method is easy to implement. Fully considering and utilizing the fish physiological mechanism and fish behavior characteristics, the solution It solves the problem of catching cold-water fish in warm seas in summer.

Description

technical field [0001] The invention belongs to the technical field of aquaculture and marine resources development, and relates to a device for catching cold-water fish in a large-scale culture cage in a warm sea area in summer, and in particular to a device and method for catching cold-water fish in a large-scale culture cage in summer , used to support the expansion of seawater fish cage culture to deep sea. Background technique [0002] The cold water mass of the Yellow Sea is located in the deep layer and bottom of the central part of the Yellow Sea in my country. In summer, the water temperature is low and the water quality is good. The sea area is about 130,000 square kilometers and the water volume is 500 billion cubic meters. It can be used to breed cold-water marine economic species such as salmon and trout. In 2018, my country independently developed and built the world's first fully submersible deep-sea aquaculture cage "Deep Blue No. 1", and is currently buildin...

AI Technical Summary

Problems solved by technology

Practice has proved that the device is prone to failure under the conditions of corrosion and high sea conditions, and it will affect the time-sensitive fishing and production plan

At present, bottom trawling is the main way to catch deep-water fish in batches in the ocean. Fish cultured in ordinary cages are mainly caught by purse seine. There is no simple and reliable fishing technology and method for deep-water fish cultured in large-scale cages. device

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