Simply-equipped shrimp larva light trapping device

Abstract

The invention relates to a simply-equipped shrimp larva light trapping device which comprises a capturing box and lighting strips. The capturing box is generally of a cylinder shape, the bottom of the capturing box is generally of a cone shape, an upper opening of the capturing box is quite large, the lighting strips are arranged in the capturing box, a release hole is formed in the central position of the bottom of the capturing box, and the release hole at the bottom of the capturing box is provided with an outward flanging, a detachable sealing cover is arranged on the release hole, a semi sphere-shaped sealing mesh enclosure is arranged on the upper opening of the capturing box, the shape of the semi sphere-shaped sealing mesh enclosure is matched with the capturing box, the semi sphere-shaped sealing mesh enclosure is connected with the capturing box in a hinged mode, the sphere-shaped sealing mesh enclosure is connected with the capturing box with an axis of the end face of the capturing box as a rotating shaft in a hinged mode, a digging rope which is arranged on a pulley wheel at one end of a telescopic rod is connected with the sphere-shaped sealing mesh enclosure, and the other end of the dragging rope penetrates through the pulley wheel and is connected on a wire winding device at the other end of the telescopic rod. The simply-equipped shrimp larva light trapping device can enable shrimp larvae to enter the trapping device automatically and rapidly under irradiation of light-emitting diode (LED) light, and collision and friction between the shrimp larva and external objects can not be caused.

Description

technical field [0001] The invention belongs to the technical field of shrimp larvae capture devices in shallow water areas, and in particular relates to a simple light trapping device for shrimp larvae. Background technique [0002] At present, in the field of domestic aquatic fishery scientific research, for the process of collecting and catching small shrimp larvae experimental organisms in water bodies, simple net devices such as hand-made nets or self-made portable nets are often used. Due to material and design limitations, these devices have small net pockets, no closed structure around them, and cannot be hidden in the water body. Often, the shrimp jumps and escapes quickly due to the disturbance of the water body during the capture process, resulting in a low capture success rate. . Especially the characteristics of the living habits of shrimp larvae, most of them inhabit the bottom of the water body during the day, so the success rate of catching during the day is...

AI Technical Summary

Problems solved by technology

Due to material and design limitations, these devices have small net pockets, no closed structure around them, and cannot be hidden in the water body. Often, the shrimp jumps and escapes quickly due to the disturbance of the water body during the capture process, resulting in a low capture success rate.

Especially the characteristics of the living habits of shrimp larvae, they mostly inhabit the bottom of the water body during the day, so the success rate of catching during the day is very low, and they are usually carried out at night

Because shrimp larvae have phototaxis, they are often caught with the help of a flashlight, which is cumbersome to operate

And because the above-mentioned nets are used to move back and forth frequently in the water body, it is easy to cause damage to the shrimp larvae during the capture process, thereby affecting the relevant experimental research results

Moreover, frequent operation of simple nets such as hand-written nets or self-made moving nets for a long time may easily cause damage to the net body, and the reuse rate of the device is low.

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