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An Antarctic krill trawl targeting method based on detection of shrimp population density

An Antarctic krill and trawling technology, which is applied in fishing, fishing nets, and sound wave reradiation, etc., can solve problems such as maximization, inconsistent depth distribution, and inability to achieve catch yield, and achieve the effect of increasing catch yield

Active Publication Date: 2022-05-17
EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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  • Application Information

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Problems solved by technology

Due to the limited area of ​​the trawl net opening and the inconsistent depth distribution of shrimp populations along the sweeping direction of the trawl net, the existing trawling net sweeping fishing method cannot maximize the catch yield

Method used

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  • An Antarctic krill trawl targeting method based on detection of shrimp population density
  • An Antarctic krill trawl targeting method based on detection of shrimp population density
  • An Antarctic krill trawl targeting method based on detection of shrimp population density

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Embodiment Construction

[0032] Below in conjunction with specific embodiment, further illustrate the present invention. It should be understood that these examples are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the teachings of the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0033] Such as figure 1 A targeted fishing method of Antarctic krill trawling based on the detection of shrimp population density is shown, including the following steps:

[0034] (1) During the movement of the fishing boat dragging the trawl, the water depth distribution information of the Antarctic krill population was obtained in real time through the onboard sonar.

[0035] (2) According to the acquired depth distribution...

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Abstract

The invention relates to a targeted fishing method of Antarctic krill trawling based on detection of shrimp population density. The acquired water depth distribution information of the Antarctic krill population and the size of the trawl net mouth are intelligently analyzed by the control system to obtain the core interval of the maximum density of the Antarctic krill population in the sonar vertical area; The distance signal between the fishing boats, and the detection signal is transmitted to the control system; combined with the sailing speed of the fishing boat, analyzed by the control system, and the real-time execution operation signal of the trawl lifting and lowering control is obtained; by actively adjusting the trawl lifting and lowering, the trawl net port is controlled Tracking the path of the core interval of maximum density of Antarctic krill populations for mobile fishing. The invention can improve the fishing yield of Antarctic krill under the same sweeping area.

Description

technical field [0001] The invention belongs to the technical field of Antarctic krill fishing, and in particular relates to an Antarctic krill trawl targeted fishing method based on detection of shrimp population density. Background technique [0002] Antarctic krill is a type of krill that lives in the waters of Antarctica in the Southern Ocean, living in swarms. Antarctic krill swims slowly, and its group movement and distribution changes slowly, basically following the ocean currents, and the horizontal and vertical movement of the group is not large in a short period of time. In addition, Antarctic krill responds slowly to physical stimuli, and when the nets cut the krill population, there will be no obvious instantaneous jumping of the population. The behavior of Antarctic krill has a greater response to light changes, so it has diurnal vertical migration habits. [0003] In the prior art, when fishing for Antarctic krill with trawling nets (including truss trawling ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A01K73/02G01S15/88
CPCA01K73/02A01K73/025G01S15/88Y02A40/81
Inventor 王鲁民张胜茂王永进戴阳齐广瑞
Owner EAST CHINA SEA FISHERIES RES INST CHINESE ACAD OF FISHERY SCI
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