A device for observing fish behavior in trawl mesh pockets

Abstract

The invention discloses a device for observing fish behavior in a trawl net bag, comprising: a frame and a mesh bag matched with the frame; a groove is arranged on the outer side of the frame, and a camera assembly is matched and connected in the groove, and the camera assembly can Slide along the groove; the inside of the frame is a hollow structure, the inside of the frame is provided with a first magnetic ball and a second magnetic ball, a water inlet is provided on one side of the frame, and a swing plate is provided on the side of the water inlet close to the frame to swing The plate can control the flow direction or / and flow rate of the water flow along the inside of the frame; the camera assembly includes a first block and a second block, and the first block and the second block are both arranged in the groove. A clamping block is connected with a first adjusting rod, and a second clamping block is connected with a second adjusting rod, and the first adjusting rod is connected with a probe with the free end of the second adjusting rod; the first clamping block is connected with the first adjusting rod. The magnetic balls are matched, and the second block is matched with the second magnetic balls.

Description

technical field [0001] The invention relates to a fish behavior observation device, in particular to a fish behavior observation device in a trawl net bag. Background technique [0002] Fish ethology is an emerging discipline that studies the laws of fish behavior. It belongs to the category of animal ethology and is closely related to fish ecology, fish psychology and fishery. Various behaviors under conditions, including individual behavior and group behavior, are the research objects of fish behavior. Responses, including swimming, feeding, reproduction, breathing and other movements, in addition to avoiding, attacking, changing body color during courtship and other non-motor forms are also included in the category of behavior, in the process of catching fish through trawling, fish will also produce certain. Behavioral responses, such as startling, escaping and other behaviors, as well as the behavioral changes and behavioral differences of different fish in the trawl, w...

AI Technical Summary

Problems solved by technology

[0003] Most of the traditional observation devices set the camera device in the mesh bag to take pictures of the fish inside the mesh bag. The setting of the camera device is easy to affect the flow state in the mesh and reduce the shooting effect. In addition, the camera device is fixed in the mesh bag. Inside, it cannot be moved, and some areas inside the mesh bag cannot be detected, and some camera devices are directly inserted into the water, located outside the mesh bag, and set separately from the mesh bag. During the movement of the mesh bag, the camera device also needs to be adjusted , it is more troublesome to use

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